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Hermann M, Polazzo F, Cherta L, Crettaz-Minaglia M, García-Astillero A, Peeters ETHM, Rico A, Van den Brink PJ. Combined stress of an insecticide and heatwaves or elevated temperature induce community and food web effects in a Mediterranean freshwater ecosystem. WATER RESEARCH 2024; 260:121903. [PMID: 38875860 DOI: 10.1016/j.watres.2024.121903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/16/2024]
Abstract
Ongoing global climate change will shift nature towards Anthropocene's unprecedented conditions by increasing average temperatures and the frequency and severity of extreme events, such as heatwaves. While such climatic changes pose an increased threat for freshwater ecosystems, other stressors like pesticides may interact with warming and lead to unpredictable effects. Studies that examine the underpinned mechanisms of multiple stressor effects are scarce and often lack environmental realism. Here, we conducted a multiple stressors experiment using outdoor freshwater mesocosms with natural assemblages of macroinvertebrates, zooplankton, phytoplankton, macrophytes, and microbes. The effects of the neonicotinoid insecticide imidacloprid (1 µg/L) were investigated in combination with three temperature scenarios representing ambient, elevated temperatures (+4 °C), and heatwaves (+0 to 8 °C), the latter two having similar energy input. We found similar imidacloprid dissipation patterns for all temperature treatments with lowest average dissipation half-lives under both warming scenarios (DT50: 3 days) and highest under ambient temperatures (DT50: 4 days) throughout the experiment. Amongst all communities, only the zooplankton community was significantly affected by the combined treatments. This community demonstrated low chemical sensitivity with lagged and significant negative imidacloprid effects only for cyclopoids. Heatwaves caused early and long-lasting significant effects on the zooplankton community as compared to elevated temperatures, with Polyarthra, Daphnia longispina, Lecanidae, and cyclopoids being the most negatively affected taxa, whereas Ceriodaphnia and nauplii showed positive responses to temperature. Community recovery from imidacloprid stress was slower under heatwaves, suggesting temperature-enhanced toxicity. Finally, microbial and macrofauna litter degradation were significantly enhanced by temperature, whereas the latter was also negatively affected by imidacloprid. A structural equation model depicted cascading food web effects of both stressors with stronger relationships and significant negative stressor effects at higher than at lower trophic levels. Our study highlights the threat of a series of heatwaves compared to elevated temperatures for imidacloprid-stressed freshwaters.
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Affiliation(s)
- Markus Hermann
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands.
| | - Francesco Polazzo
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain
| | - Laura Cherta
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain
| | - Melina Crettaz-Minaglia
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain
| | - Ariadna García-Astillero
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain
| | - Edwin T H M Peeters
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Avenida Punto Com 2, 28805 Alcalá de Henares, Madrid, Spain
| | - Paul J Van den Brink
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands
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2
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Dela Cruz J, Lammel D, Kim SW, Bi M, Rillig M. COVID-19 pandemic-related drugs and microplastics from mask fibers jointly affect soil functions and processes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34587-x. [PMID: 39102138 DOI: 10.1007/s11356-024-34587-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Accepted: 07/28/2024] [Indexed: 08/06/2024]
Abstract
The COVID-19 pandemic has led to an unprecedented increase in pharmaceutical drug consumption and plastic waste disposal from personal protective equipment. Most drugs consumed during the COVID-19 pandemic were used to treat other human and animal diseases. Hence, their nearly ubiquitous presence in the soil and the sharp increase in the last 3 years led us to investigate their potential impact on the environment. Similarly, the compulsory use of face masks has led to an enormous amount of plastic waste. Our study aims to investigate the combined effects of COVID-19 drugs and microplastics from FFP2 face masks on important soil processes using soil microcosm experiments. We used three null models (additive, multiplicative, and dominative models) to indicate potential interactions among different pharmaceutical drugs and mask MP. We found that the multiple-factor treatments tend to affect soil respiration and FDA hydrolysis more strongly than the individual treatments. We also found that mask microplastics when combined with pharmaceuticals caused greater negative effects on soil. Additionally, null model predictions show that combinations of high concentrations of pharmaceuticals and mask MP have antagonistic interactions on soil enzyme activities, while the joint effects of low concentrations of pharmaceuticals (with or without MP) on soil enzyme activities are mostly explained by null model predictions. Our study underscores the need for more attention on the environmental side effects of pharmaceutical contamination and their potential interactions with other anthropogenic global change factors.
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Affiliation(s)
- Jeane Dela Cruz
- Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195, Berlin, Germany
| | - Daniel Lammel
- Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195, Berlin, Germany
| | - Shin Woong Kim
- Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195, Berlin, Germany
| | - Mohan Bi
- Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195, Berlin, Germany
| | - Matthias Rillig
- Institute of Biology, Freie Universität Berlin, 14195, Berlin, Germany.
- Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195, Berlin, Germany.
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3
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Parker B, Britton JR, Green ID, Jackson MC, Andreou D. Microplastic-stressor responses are rarely synergistic in freshwater fishes: A meta-analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 947:174566. [PMID: 38986705 DOI: 10.1016/j.scitotenv.2024.174566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/17/2024] [Accepted: 07/04/2024] [Indexed: 07/12/2024]
Abstract
Microplastic exposure can cause a range of negative effects on the biochemistry, condition and ecology of freshwater fishes depending on aspects of the exposure and the exposed fish. However, fishes are typically exposed to microplastics and additional multiple stressors simultaneously, for which the combined effects are poorly understood and may have important management consequences. Additive effects are those where the combined effect is equal to the sum, antagonistic where combined effects are less than the sum and for synergistic effects the combined effect is greater to the sum of the individual effects. Here, we performed a meta-analysis of studies recording freshwater fish responses to microplastic-stressor exposures to test if interactions were primarily non-additive (synergistic or antagonistic), and factors impacting the net response. Individual responses were classified (antagonistic/additive/synergistic) and the fit of net responses to a null additive model determined for 838 responses (36 studies) split by categorical variables for the microplastic exposure (environmental relevance, interacting stressor, microplastic morphology and response category measured), as well as the exposed fish (lifestage, ecology and family). Most responses were classified as antagonistic (48 %) and additive (34 %), with synergistic effects least frequent (17 %). Net responses fitted null additive models for all levels of interacting stressor, fish family and microplastic morphology. In contrast, net antagonism was present for biochemical responses, embryo lifestages, environmentally relevant microplastic exposures and fish with benthopelagic ecology, while synergism was identified for fishes with demersal ecology. While substantial knowledge gaps remain and are discussed, the data thus far suggest microplastic-stressor responses in freshwater fishes are rarely synergistic and, therefore, addressing either or both stressors will likely result in positive management and biological outcomes.
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Affiliation(s)
- Ben Parker
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset, BH12 5BB, UK; Department of Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, Devon EX4 4QD, UK.
| | - J Robert Britton
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset, BH12 5BB, UK
| | - Iain D Green
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset, BH12 5BB, UK
| | | | - Demetra Andreou
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset, BH12 5BB, UK
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4
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Conner LM, Goedert D, Fitzpatrick SW, Fearnley A, Gallagher EL, Peterman JD, Forgione ME, Kokosinska S, Hamilton M, Masala LA, Merola N, Rico H, Samma E, Brady SP. Population origin and heritable effects mediate road salt toxicity and thermal stress in an amphibian. CHEMOSPHERE 2024; 357:141978. [PMID: 38608774 DOI: 10.1016/j.chemosphere.2024.141978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 03/13/2024] [Accepted: 04/09/2024] [Indexed: 04/14/2024]
Abstract
Human impacts on wild populations are numerous and extensive, degrading habitats and causing population declines across taxa. Though these impacts are often studied individually, wild populations typically face suites of stressors acting concomitantly, compromising the fitness of individuals and populations in ways poorly understood and not easily predicted by the effects of any single stressor. Developing understanding of the effects of multiple stressors and their potential interactions remains a critical challenge in environmental biology. Here, we focus on assessing the impacts of two prominent stressors associated with anthropogenic activities that affect many organisms across the planet - elevated salinity (e.g., from road de-icing salt) and temperature (e.g. from climate change). We examined a suite of physiological traits and components of fitness across populations of wood frogs originating from ponds that differ in their proximity to roads and thus their legacy of exposure to pollution from road salt. When experimentally exposed to road salt, wood frogs showed reduced survival (especially those from ponds adjacent to roads), divergent developmental rates, and reduced longevity. Family-level effects mediated these outcomes, but high salinity generally eroded family-level variance. When combined, exposure to both temperature and salt resulted in very low survival, and this effect was strongest in roadside populations. Taken together, these results suggest that temperature is an important stressor capable of exacerbating impacts from a prominent contaminant confronting many freshwater organisms in salinized habitats. More broadly, it appears likely that toxicity might often be underestimated in the absence of multi-stressor approaches.
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Affiliation(s)
- Lauren M Conner
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Debora Goedert
- Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
| | - Sarah W Fitzpatrick
- W.K. Kellogg Biological Station, Michigan State University, Hickory Corners, MI, USA; Department of Integrative Biology, Michigan State University, East Lansing, MI, USA; Ecology, Evolution, and Behavior Program, Michigan State University, East Lansing, MI, USA
| | - Amber Fearnley
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Emma L Gallagher
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Jessica D Peterman
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Mia E Forgione
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Sophia Kokosinska
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Malik Hamilton
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Lydia A Masala
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Neil Merola
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Hennesy Rico
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Eman Samma
- Southern Connecticut State University, Biology Department, New Haven, CT, USA
| | - Steven P Brady
- Southern Connecticut State University, Biology Department, New Haven, CT, USA.
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5
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Orr JA, Macaulay SJ, Mordente A, Burgess B, Albini D, Hunn JG, Restrepo-Sulez K, Wilson R, Schechner A, Robertson AM, Lee B, Stuparyk BR, Singh D, O'Loughlin I, Piggott JJ, Zhu J, Dinh KV, Archer LC, Penk M, Vu MTT, Juvigny-Khenafou NPD, Zhang P, Sanders P, Schäfer RB, Vinebrooke RD, Hilt S, Reed T, Jackson MC. Studying interactions among anthropogenic stressors in freshwater ecosystems: A systematic review of 2396 multiple-stressor experiments. Ecol Lett 2024; 27:e14463. [PMID: 38924275 DOI: 10.1111/ele.14463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/26/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024]
Abstract
Understanding the interactions among anthropogenic stressors is critical for effective conservation and management of ecosystems. Freshwater scientists have invested considerable resources in conducting factorial experiments to disentangle stressor interactions by testing their individual and combined effects. However, the diversity of stressors and systems studied has hindered previous syntheses of this body of research. To overcome this challenge, we used a novel machine learning framework to identify relevant studies from over 235,000 publications. Our synthesis resulted in a new dataset of 2396 multiple-stressor experiments in freshwater systems. By summarizing the methods used in these studies, quantifying trends in the popularity of the investigated stressors, and performing co-occurrence analysis, we produce the most comprehensive overview of this diverse field of research to date. We provide both a taxonomy grouping the 909 investigated stressors into 31 classes and an open-source and interactive version of the dataset (https://jamesaorr.shinyapps.io/freshwater-multiple-stressors/). Inspired by our results, we provide a framework to help clarify whether statistical interactions detected by factorial experiments align with stressor interactions of interest, and we outline general guidelines for the design of multiple-stressor experiments relevant to any system. We conclude by highlighting the research directions required to better understand freshwater ecosystems facing multiple stressors.
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Affiliation(s)
- James A Orr
- Department of Biology, University of Oxford, Oxford, UK
- School of the Environment, University of Queensland, Brisbane, Queensland, Australia
| | | | | | - Benjamin Burgess
- Department of Genetics, Evolution and Environment, University College London, London, UK
| | - Dania Albini
- Department of Biology, University of Oxford, Oxford, UK
| | - Julia G Hunn
- Department of Zoology, University of Otago, Dunedin, New Zealand
| | | | - Ramesh Wilson
- Department of Biology, University of Oxford, Oxford, UK
| | - Anne Schechner
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
- Ruumi ApS, Svendborg, Denmark
| | - Aoife M Robertson
- Zoology, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Bethany Lee
- Department of Biology, University of Oxford, Oxford, UK
| | - Blake R Stuparyk
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Delezia Singh
- Natural Resources Institute, University of Manitoba, Winnipeg, Canada
| | | | - Jeremy J Piggott
- Zoology, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Jiangqiu Zhu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Khuong V Dinh
- Section for Aquatic Biology and Toxicology, Department of Biosciences, University of Oslo, Oslo, Norway
| | - Louise C Archer
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, Canada
| | - Marcin Penk
- Zoology, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
- School of Biology and Environmental Science, University College Dublin, Dublin, Ireland
| | - Minh Thi Thuy Vu
- Section for Aquatic Biology and Toxicology, Department of Biosciences, University of Oslo, Oslo, Norway
| | - Noël P D Juvigny-Khenafou
- Institute of Aquaculture, University of Stirling, Scotland, UK
- Institute of Environmental Sciences, RPTU Kaiserslautern-Landau, Germany
| | - Peiyu Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | | | - Ralf B Schäfer
- Research Center One Health Ruhr, University Alliance Ruhr
- Faculty of Biology, University Duisburg-Essen, Essen, Germany
| | - Rolf D Vinebrooke
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Sabine Hilt
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Thomas Reed
- School of Biological, Earth & Environmental Sciences, University College Cork, Cork, Ireland
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6
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Sun X, Arnott SE. Timing determines zooplankton community responses to multiple stressors. GLOBAL CHANGE BIOLOGY 2024; 30:e17358. [PMID: 38822590 DOI: 10.1111/gcb.17358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 03/31/2024] [Accepted: 04/19/2024] [Indexed: 06/03/2024]
Abstract
Human activities and climate change cause abiotic factors to fluctuate through time, sometimes passing thresholds for organismal reproduction and survival. Multiple stressors can independently or interactively impact organisms; however, few studies have examined how they interact when they overlap spatially but occur asynchronously. Fluctuations in salinity have been found in freshwater habitats worldwide. Meanwhile, heatwaves have become more frequent and extreme. High salinity pulses and heatwaves are often decoupled in time but can still collectively impact freshwater zooplankton. The time intervals between them, during which population growth and community recovery could happen, can influence combined effects, but no one has examined these effects. We conducted a mesocosm experiment to examine how different recovery times (0-, 3-, 6-week) between salt treatment and heatwave exposure influence their combined effects. We hypothesized that antagonistic effects would appear when having short recovery time, because previous study found that similar species were affected by the two stressors, but effects would become additive with longer recovery time since fully recovered communities would respond to heatwave similar to undisturbed communities. Our findings showed that, when combined, the two-stressor joint impacts changed from antagonistic to additive with increased recovery time between stressors. Surprisingly, full compositional recovery was not achieved despite a recovery period that was long enough for population growth, suggesting legacy effects from earlier treatment. The recovery was mainly driven by small organisms, such as rotifers and small cladocerans. As a result, communities recovering from previous salt exposure responded differently to heatwaves than undisturbed communities, leading to similar zooplankton communities regardless of the recovery time between stressors. Our research bolsters the understanding and management of multiple-stressor issues by revealing that prior exposure to one stressor has long-lasting impacts on community recovery that can lead to unexpected joint effects of multiple stressors.
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Affiliation(s)
- Xinyu Sun
- Biology Department, Queen's University, Kingston, Ontario, Canada
| | - Shelley E Arnott
- Biology Department, Queen's University, Kingston, Ontario, Canada
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7
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Graça D, Arias-Real R, Fernandes I, Cássio F, Pascoal C. Fungal identity mediates the impacts of multiple stressors on freshwater ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 937:173466. [PMID: 38788941 DOI: 10.1016/j.scitotenv.2024.173466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 05/16/2024] [Accepted: 05/21/2024] [Indexed: 05/26/2024]
Abstract
Predicting how multiple anthropogenic stressors affect natural ecosystems is a major challenge in ecology. Freshwater ecosystems are threatened worldwide by multiple co-occurring stressors, which can affect aquatic biodiversity, ecosystem functioning and human wellbeing. In stream ecosystems, aquatic fungi play a crucial role in global biogeochemical cycles and food web dynamics, therefore, assessing the functional consequences of fungal biodiversity loss under multiple stressors is crucial. Here, a microcosm approach was used to investigate the effects of multiple stressors (increased temperature and nutrients, drying, and biodiversity loss) on three ecosystem processes: organic matter decomposition, fungal reproduction, and fungal biomass accrual. Net effects of stressors were antagonistic for organic matter decomposition, but additive for fungal reproduction and biomass accrual. Net effects of biodiversity were mainly positive for all processes, even under stress, demonstrating that diversity assures the maintenance of ecosystem processes. Fungal species displayed distinct contributions to each ecosystem process. Furthermore, species with negligible contributions under control conditions changed their role under stress, either enhancing or impairing the communities' performance, emphasizing the importance of fungal species identity. Our study highlights that distinct fungal species have different sensitivities to environmental variability and have different influence on the overall performance of the community. Therefore, preserving high fungal diversity is crucial to maintain fungal species with key ecosystem functions within aquatic communities in face of environmental change.
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Affiliation(s)
- Diana Graça
- CBMA, Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S, Institute of Science and Innovation for Bio-Sustainability, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Rebeca Arias-Real
- CBMA, Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S, Institute of Science and Innovation for Bio-Sustainability, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
| | - Isabel Fernandes
- CBMA, Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S, Institute of Science and Innovation for Bio-Sustainability, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Fernanda Cássio
- CBMA, Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S, Institute of Science and Innovation for Bio-Sustainability, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Cláudia Pascoal
- CBMA, Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S, Institute of Science and Innovation for Bio-Sustainability, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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8
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Madge Pimentel I, Baikova D, Buchner D, Burfeid Castellanos A, David GM, Deep A, Doliwa A, Hadžiomerović U, Mayombo NAS, Prati S, Spyra MA, Vermiert AM, Beisser D, Dunthorn M, Piggott JJ, Sures B, Tiegs SD, Leese F, Beermann AJ. Assessing the response of an urban stream ecosystem to salinization under different flow regimes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171849. [PMID: 38537828 DOI: 10.1016/j.scitotenv.2024.171849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/08/2024] [Accepted: 03/19/2024] [Indexed: 04/07/2024]
Abstract
Urban streams are exposed to a variety of anthropogenic stressors. Freshwater salinization is a key stressor in these ecosystems that is predicted to be further exacerbated by climate change, which causes simultaneous changes in flow parameters, potentially resulting in non-additive effects on aquatic ecosystems. However, the effects of salinization and flow velocity on urban streams are still poorly understood as multiple-stressor experiments are often conducted at pristine rather than urban sites. Therefore, we conducted a mesocosm experiment at the Boye River, a recently restored stream located in a highly urbanized area in Western Germany, and applied recurrent pulses of salinity along a gradient (NaCl, 9 h daily of +0 to +2.5 mS/cm) in combination with normal and reduced current velocities (20 cm/s vs. 10 cm/s). Using a comprehensive assessment across multiple organism groups (macroinvertebrates, eukaryotic algae, fungi, parasites) and ecosystem functions (primary production, organic-matter decomposition), we show that flow velocity reduction has a pervasive impact, causing community shifts for almost all assessed organism groups (except fungi) and inhibiting organic-matter decomposition. Salinization affected only dynamic components of community assembly by enhancing invertebrate emigration via drift and reducing fungal reproduction. We caution that the comparatively small impact of salt in our study can be due to legacy effects from past salt pollution by coal mining activities >30 years ago. Nevertheless, our results suggest that urban stream management should prioritize the continuity of a minimum discharge to maintain ecosystem integrity. Our study exemplifies a holistic approach for the assessment of multiple-stressor impacts on streams, which is needed to inform the establishment of a salinity threshold above which mitigation actions must be taken.
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Affiliation(s)
- Iris Madge Pimentel
- Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Essen, Germany.
| | - Daria Baikova
- Aquatic Microbiology, Environmental Microbiology and Biotechnology, Faculty of Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Dominik Buchner
- Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | | | - Gwendoline M David
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Department of Plankton and Microbial Ecology, Stechlin, Germany
| | - Aman Deep
- Biodiversity, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Annemie Doliwa
- Aquatic Ecology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
| | - Una Hadžiomerović
- Aquatic Microbiology, Environmental Microbiology and Biotechnology, Faculty of Chemistry, University of Duisburg-Essen, Essen, Germany
| | | | - Sebastian Prati
- Aquatic Ecology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
| | | | - Anna-Maria Vermiert
- Ruhr University Bochum, Department of Animal Ecology, Evolution and Biodiversity, Bochum, Germany
| | - Daniela Beisser
- Department of Engineering and Natural Sciences, Westphalian University of Applied Sciences, Recklinghausen, Germany
| | - Micah Dunthorn
- Natural History Museum, University of Oslo, Oslo, Norway
| | - Jeremy J Piggott
- Zoology and Trinity Centre for the Environment, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
| | - Bernd Sures
- Aquatic Ecology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany; Research Center One Health Ruhr of the University Alliance Ruhr, University of Duisburg-Essen, Essen, Germany
| | - Scott D Tiegs
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Florian Leese
- Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
| | - Arne J Beermann
- Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
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9
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Tong R, Zhang B. Cumulative risk assessment for combinations of environmental and psychosocial stressors: A systematic review. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2024; 20:602-615. [PMID: 37526127 DOI: 10.1002/ieam.4821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/27/2023] [Accepted: 07/28/2023] [Indexed: 08/02/2023]
Abstract
With the growing awareness of stressors, cumulative risk assessment (CRA) has been proposed as a potential method to evaluate possible additive and synergistic effects of multiple stressors on human health, thus informing environmental regulation and protecting public health. However, CRA is still in its exploratory stage due to the lack of generally accepted quantitative approaches. It is an ideal time to summarize the existing progress to guide future research. To this end, a systematic review of the literature on CRA issues dealing with combinations of environmental and psychosocial stressors was conducted in this study. Using typology and bibliometric analysis, the body of knowledge, hot topics, and research gaps in this field were characterized. It was found that research topics and objectives mainly focus on qualitative analysis and community settings; more attention should be paid to the development of quantitative approaches and the inclusion of occupational settings. Further, the roles of air pollution and vulnerability factors in CRA have attracted the most attention. This study concludes with views on future prospects to promote theoretical and practical development in this field; specifically, CRA is a multifaceted topic that requires substantial collaborations with various stakeholders and substantial knowledge from multidisciplinary fields. This study presents an overall review as well as research directions worth investigating in this field, which provides a historical reference for future study. Integr Environ Assess Manag 2024;20:602-615. © 2023 SETAC.
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Affiliation(s)
- Ruipeng Tong
- School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, China
| | - Boling Zhang
- School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, China
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10
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Kokotović I, Veseli M, Ložek F, Karačić Z, Rožman M, Previšić A. Pharmaceuticals and endocrine disrupting compounds modulate adverse effects of climate change on resource quality in freshwater food webs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168751. [PMID: 38008314 DOI: 10.1016/j.scitotenv.2023.168751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 11/13/2023] [Accepted: 11/19/2023] [Indexed: 11/28/2023]
Abstract
Freshwater biodiversity, ecosystem functions and services are changing at an unprecedented rate due to the impacts of vast number of stressors overlapping in time and space. Our study aimed at characterizing individual and combined impacts of pollution with pharmaceuticals (PhACs) and endocrine disrupting compounds (EDCs) and increased water temperature (as a proxy for climate change) on primary producers and first level consumers in freshwaters. We conducted a microcosm experiment with a simplified freshwater food web containing moss (Bryophyta) and shredding caddisfly larvae of Micropterna nycterobia (Trichoptera). The experiment was conducted with four treatments; control (C), increased water temperature + 4 °C (T2), emerging contaminants' mix (EC = 15 PhACs & 5 EDCs), and multiple stressor treatment (MS = EC + T2). Moss exhibited an overall mild response to selected stressors and their combination. Higher water temperature negatively affected development of M. nycterobia through causing earlier emergence of adults and changes in their lipidome profiles. Pollution with PhACs and EDCs had higher impact on metabolism of all life stages of M. nycterobia than warming. Multiple stressor effect was recorded in M. nycterobia adults in metabolic response, lipidome profiles and as a decrease in total lipid content. Sex specific response to stressor effects was observed in adults, with impacts on metabolome generally more pronounced in females, and on lipidome in males. Thus, our study highlights the variability of both single and multiple stressor impacts on different traits, different life stages and sexes of a single insect species. Furthermore, our research suggests that the combined impacts of warming, linked to climate change, and contamination with PhACs and EDCs could have adverse consequences on the population dynamics of aquatic insects. Additionally, these findings point to a potential decrease in the quality of resources available for both aquatic and potentially terrestrial food webs.
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Affiliation(s)
- Iva Kokotović
- Department of Biology, Zoology, Faculty of Science, University of Zagreb, Zagreb, Croatia.
| | - Marina Veseli
- Department of Biology, Zoology, Faculty of Science, University of Zagreb, Zagreb, Croatia.
| | - Filip Ložek
- Department of Biology, Zoology, Faculty of Science, University of Zagreb, Zagreb, Croatia; South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, Czech Republic.
| | | | | | - Ana Previšić
- Department of Biology, Zoology, Faculty of Science, University of Zagreb, Zagreb, Croatia.
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11
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Kefford BJ, Hyne RV, Brooks AJ, Shenton MD, Hills K, Nichols SJ, Bray JP. Do magnesium and chloride ameliorate high sodium bicarbonate concentrations? A comparison between laboratory and mesocosm toxicity experiments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169003. [PMID: 38043815 DOI: 10.1016/j.scitotenv.2023.169003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/16/2023] [Accepted: 11/28/2023] [Indexed: 12/05/2023]
Abstract
Increasing salinity is a concern for biodiversity in many freshwater ecosystems globally. Single species laboratory toxicity tests show major differences in freshwater organism survival depending on the specific ions that comprise salinity types and/or their ion ratios. Toxicity has been shown to be reduced by altering ionic composition, despite increasing (total) salinity. For insistence, single species tests show the toxicity of sodium bicarbonate (NaHCO3, which commonly is a large proportion of the salts from coalbeds) to freshwater invertebrates is reduced by adding magnesium (Mg2+) or chloride (Cl-). However, it is uncertain whether reductions in mortality observed in single-species laboratory tests predict effects within populations, communities and to ecosystem processes in more complex multi-species systems both natural and semi-natural. Here we report the results of an outdoor multi-species mesocosm experiment to determine if the effects of NaHCO3 are reduced by increasing the concentrations of Mg2+ or Cl- on: a) stream macroinvertebrate populations and communities; b) benthic chlorophyll-a and; c) the ecosystem process of leaf litter decomposition. We found a large effect of a high NaHCO3 concentration (≈4.45 mS/cm) with reduced abundances of multiple taxa, reduced emergence of adult insects and reduced species richness, altered community structure and increased leaf litter breakdown rates but no effect on benthic chlorophyll-a. However, despite predictions based on laboratory findings, we found no evidence that the addition of either Mg2+ or Cl- altered the effect of NaHCO3. In semi-natural environments such as mesocosms, and natural environments, organisms are subject to varying temperature and habitat factors, while also interacting with other species and trophic levels (e.g. predation, competition, facilitation), which are absent in single species laboratory tests. Thus, it should not be assumed single-species tests are good predictors of the effects of changing ionic compositions on stream biota in more natural environments.
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Affiliation(s)
- Ben J Kefford
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia.
| | - Ross V Hyne
- Department of Planning, Industry and Environment, Environment Protection Science, Lidcombe Laboratories, NSW 2141, Australia
| | - Andrew J Brooks
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia; Department of Planning and Environment - Water, 53, Wollongong, NSW 2500, Australia
| | - Mark D Shenton
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia
| | - Kasey Hills
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia; New South Wales Environmental Protection Authority, Locked Bag 5022, Parramatta, NSW 2124, Australia
| | - Susan J Nichols
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia
| | - Jonathan P Bray
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia; Department of Pest Management and Conservation, Lincoln University, 85084, Christchurch, Canterbury, New Zealand
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12
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Meidl P, Lehmann A, Bi M, Breitenreiter C, Benkrama J, Li E, Riedo J, Rillig MC. Combined application of up to ten pesticides decreases key soil processes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11995-12004. [PMID: 38227255 PMCID: PMC11289034 DOI: 10.1007/s11356-024-31836-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 12/29/2023] [Indexed: 01/17/2024]
Abstract
Natural systems are under increasing pressure by a range of anthropogenic global change factors. Pesticides represent a nearly ubiquitously occurring global change factor and have the potential to affect soil functions. Currently the use of synthetic pesticides is at an all-time high with over 400 active ingredients being utilized in the EU alone, with dozens of these pesticides occurring concurrently in soil. However, we presently do not understand the impacts of the potential interaction of multiple pesticides when applied simultaneously. Using soil collected from a local grassland, we utilize soil microcosms to examine the role of both rate of change and number of a selection of ten currently used pesticides on soil processes, including litter decomposition, water stable aggregates, aggregate size, soil pH, and EC. Additionally, we used null models to enrich our analyses to examine potential patterns caused by interactions between pesticide treatments. We find that both gradual and abrupt pesticide application have negative consequences for soil processes. Notably, pesticide number plays a significant role in affecting soil health. Null models also reveal potential synergistic behavior between pesticides which can further their consequences on soil processes. Our research highlights the complex impacts of pesticides, and the need for environmental policy to address the threats posed by pesticides.
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Affiliation(s)
- Peter Meidl
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Anika Lehmann
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Mohan Bi
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Carla Breitenreiter
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Jasmina Benkrama
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Erqin Li
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Judith Riedo
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
| | - Matthias C Rillig
- Institut Für Biologie, Freie Universität Berlin, Berlin, Germany.
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany.
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13
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Jarvis L, Rosenfeld J, Gonzalez-Espinosa PC, Enders EC. A process framework for integrating stressor-response functions into cumulative effects models. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167456. [PMID: 37839475 DOI: 10.1016/j.scitotenv.2023.167456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/24/2023] [Accepted: 09/27/2023] [Indexed: 10/17/2023]
Abstract
Stressor-response (SR) functions quantify ecological responses to natural environmental variation or anthropogenic stressors. They are also core drivers of cumulative effects (CE) models, which are increasingly recognized as essential management tools to grapple with the diffuse footprint of human impacts. Here, we provide a process framework for the identification, development, and integration of SR functions into CE models, and highlight their consequential properties, behaviour, criteria for selecting appropriate stressors and responses, and general approaches for deriving them. Management objectives (and causal effect pathways) will determine the ultimate stressor and target response variables of interest (i.e., individual growth/survival, population size, community structure, ecosystem processes), but data availability will constrain whether proxies need to be used for the target stressor or response variables. Available data and confidence in underlying mechanisms will determine whether empirical or mechanistic (theoretical) SR functions are optimal. Uncertainty in underlying SR functions is often the primary source of error in CE modelling, and monitoring outcomes through adaptive management to iteratively refine parameterization of SR functions is a key element of model application. Dealing with stressor interactions is an additional challenge, and in the absence of known or suspected interaction mechanisms, controlling main effects should remain the primary focus. Indicators of suspected interaction presence (i.e., much larger or smaller responses to stressor reduction than expected during monitoring) should be confirmed through adaptive management cycles or targeted stressor manipulations. Where possible, management decisions should selectively take advantage of interactions to strategically mitigate stressor impacts (i.e., by using antagonisms to suppress stressor impacts, and by using synergisms to efficiently reduce them).
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Affiliation(s)
- Lauren Jarvis
- Fisheries and Oceans Canada, Ontario & Prairie Region, Freshwater Institute, 501 University Avenue, Winnipeg, MB R3T 2N6, Canada.
| | - Jordan Rosenfeld
- UBC Institute for the Oceans and Fisheries, 2202 Main Mall, Vancouver, BC V6T 1Z4, Canada; B.C. Ministry of Environment, Vancouver, BC, Canada.
| | - Pedro C Gonzalez-Espinosa
- Nippon Foundation Ocean Nexus, Simon Fraser University, School of Resource and Environmental Management, Technology and Science Complex 1, 643A Science Rd, Burnaby, BC V5A 1S6, Canada
| | - Eva C Enders
- Institut National de la Recherche Scientifique, Eau Terre Environnement Research Centre, 490 de la Couronne Street, Quebec City, QC G1K 9A9, Canada.
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14
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Jourdan J, El Toum Abdel Fadil S, Oehlmann J, Hupało K. Rapid development of increased neonicotinoid tolerance in non-target freshwater amphipods. ENVIRONMENT INTERNATIONAL 2024; 183:108368. [PMID: 38070438 DOI: 10.1016/j.envint.2023.108368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/23/2023] [Accepted: 12/02/2023] [Indexed: 01/25/2024]
Abstract
The comprehensive assessment of the long-term impacts of constant exposure to pollutants on wildlife populations remains a relatively unexplored area of ecological risk assessment. Empirical evidence to suggest that multigenerational exposure affects the susceptibility of organisms is scarce, and the underlying mechanisms in the natural environment have yet to be fully understood. In this study, we first examined the arthropod candidate species, Gammarus roeselii that - unlike closely related species - commonly occurs in many contaminated river systems of Central Europe. This makes it a suitable study organism to investigate the development of tolerances and phenotypic adaptations along pollution gradients. In a 96-h acute toxicity assay with the neonicotinoid thiacloprid, we indeed observed a successive increase in tolerance in populations coming from contaminated regions. This was accompanied by a certain phenotypic change, with increased investment into reproduction. To address the question of whether these changes are plastic or emerged from longer lasting evolutionary processes, we conducted a multigeneration experiment in the second part of our study. Here, we used closely-related Hyalella azteca and pre-exposed them for multiple generations to sublethal concentrations of thiacloprid in a semi-static design (one week renewal of media containing 0.1 or 1.0 µg/L thiacloprid). The pre-exposed individuals were then used in acute toxicity assays to see how quickly such adaptive responses can develop. Over only two generations, the tolerance to the neonicotinoid almost doubled, suggesting developmental plasticity as a plausible mechanism for the rapid adaptive response to strong selection factors such as neonicotinoid insecticides. It remains to be discovered whether the plasticity of rapidly developed tolerance is species-specific and explains why closely related species - which may not have comparable adaptive response capabilities - disappear in polluted habitats. Overall, our findings highlight the neglected role of developmental plasticity during short- and long-term exposure of natural populations to pollution. Moreover, our results show that even pollutant levels seven times lower than concentrations found in the study region have a clear impact on the developmental trajectories of non-target species.
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Affiliation(s)
- Jonas Jourdan
- Department Aquatic Ecotoxicology, Institute for Ecology, Evolution and Diversity, Goethe University, Frankfurt am Main, Germany; Kompetenzzentrum Wasser Hessen, Max-von-Laue-Straße 13 D-60438, Frankfurt am Main, Germany.
| | - Safia El Toum Abdel Fadil
- Department Aquatic Ecotoxicology, Institute for Ecology, Evolution and Diversity, Goethe University, Frankfurt am Main, Germany; Faculty of Life Sciences, Hamburg University of Applied Sciences, Ulmenliet 20 D-21033, Hamburg, Germany
| | - Jörg Oehlmann
- Department Aquatic Ecotoxicology, Institute for Ecology, Evolution and Diversity, Goethe University, Frankfurt am Main, Germany; Kompetenzzentrum Wasser Hessen, Max-von-Laue-Straße 13 D-60438, Frankfurt am Main, Germany
| | - Kamil Hupało
- Department of Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
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15
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Mangold-Döring A, Baas J, van den Brink PJ, Focks A, van Nes EH. Toxicokinetic-Toxicodynamic Model to Assess Thermal Stress. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:21029-21037. [PMID: 38062939 PMCID: PMC10734255 DOI: 10.1021/acs.est.3c05079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/23/2023] [Accepted: 11/27/2023] [Indexed: 12/20/2023]
Abstract
Temperature is a crucial environmental factor affecting the distribution and performance of ectothermic organisms. This study introduces a new temperature damage model to interpret their thermal stress. Inspired by the ecotoxicological damage model in the General Unified Threshold model for Survival (GUTS) framework, the temperature damage model assumes that damage depends on the balance between temperature-dependent accumulation and constant repair. Mortality due to temperature stress is driven by the damage level exceeding a threshold. Model calibration showed a good agreement with the measured survival of Gammarus pulex exposed to different constant temperatures. Further, model simulations, including constant temperatures, daily temperature fluctuations, and heatwaves, demonstrated the model's ability to predict temperature effects for various environmental scenarios. With this, the present study contributes to the mechanistic understanding of temperature as a single stressor while facilitating the incorporation of temperature as an additional stressor alongside chemicals in mechanistic multistressor effect models.
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Affiliation(s)
- Annika Mangold-Döring
- Department
of Aquatic Ecology and Water Quality Management, Wageningen University and Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands
- Wageningen
Environmental Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands
| | - Jan Baas
- Wageningen
Environmental Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands
| | - Paul J. van den Brink
- Department
of Aquatic Ecology and Water Quality Management, Wageningen University and Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands
- Wageningen
Environmental Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands
| | - Andreas Focks
- System
Science Group/Institute of Mathematics, Osnabrück University, Barbarastrasse 12, D-49076 Osnabrück, Germany
| | - Egbert H. van Nes
- Department
of Aquatic Ecology and Water Quality Management, Wageningen University and Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands
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16
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Ravanbakhsh R, Agh N, Nouraein M, Bossier P. Prolonged ecological changes can affect morphometrics and gene expression profile? Focusing on Hsp-70 and NLHS-induced Hsp-70 of Artemia urmiana. ENVIRONMENTAL RESEARCH 2023; 238:117254. [PMID: 37775000 DOI: 10.1016/j.envres.2023.117254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 10/01/2023]
Abstract
BACKGROUND In recent years, many aquatic ecosystems, including Urmia Lake, have undergone severe ecological tensions. This lake, the largest natural habitat of the brine shrimp Artemia urmiana, has progressively desiccated and its salinity has dramatically increased over the last three decades. In the face of the long period environmental stresses, understanding the adaptation and ecological plasticity mechanisms is the most interesting challenges in genetic and applied ecology. These mechanisms may probably be driven by inducing expression of some genes involved in adaptation such as Hsp-70 and also adjusting morphological parameters. But they are yet to be understood. Hence, the present work aimed to study the mechanisms, along with testing the hypothesis that non-lethal heat shocked nauplii originating from drought period can evoke Hsp-70 expression more than those from rainy period. METHODS This study measured and analyzed morphometrical characters of adult male and female Artemia urmiana over three decades. Then, the influence of three-decade ecological crisis on Hsp-70 and non-lethal heat shock (NLHS)-induced Hsp-70 expression levels of nauplii of Artemia urmiana habiting Urmia Lake using Real-time PCR technique, based on cyst collections in 1994 (rainy period) to 2020 (drought period), was evaluated. RESULTS The morphometrics results showed that the morphological characters were significantly shrunk in 2020 compared to 1994 (CI 95%, p < 0.05). Furthermore, our results depicted that, Hsp-70 expression level was significantly upregulated in response to the prolonged ecological crisis, (CI 95%, P < 0.0001), and also interestingly, the nauplii exposed to longe-term ecological crisis (belong to 2020) were able to increase Hsp-70 expression more than other ones in response to environmental stressors including heat. CONCLUSIONS The present results showed the involvement of Hsp-70 in the adaptation of Artemia urmiana to long term ecological alteration at the cost of shrinking morphometric parameters.
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Affiliation(s)
- Reyhaneh Ravanbakhsh
- Department of Aquatic Biotechnology, Artemia and Aquaculture Research Institute, Urmia University, Urmia, Iran.
| | - Naser Agh
- Department of Biology and Aquaculture, Artemia and Aquaculture Research Institute, Urmia University, Urmia, Iran
| | - Mojtaba Nouraein
- Department of Plant Genetics and Production, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
| | - Peter Bossier
- Laboratory of Aquaculture and Artemia Reference Center, Ghent University, Gent, Belgium
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17
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Bhattacharyya S, Bray JP, Gupta A, Gupta S, Nichols SJ, Kefford BJ. Short-term insecticide exposure amid co-occurring stressors reduces diversity and densities in north-east Indian experimental aquatic invertebrate communities. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 264:106691. [PMID: 37866165 DOI: 10.1016/j.aquatox.2023.106691] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 08/25/2023] [Accepted: 09/07/2023] [Indexed: 10/24/2023]
Abstract
Globally, river pesticide concentrations are associated with regional and local stream invertebrate diversity declines. Pesticides often co-occur with elevated nutrients (e.g. nitrogen and phosphorus) and sediments related to agriculture, making their individual effects difficult to disentangle. These effects are also less well studied in Asia, than in other geographic regions. Within Asia, India is one of the largest producers and users of pesticides and has approximately 60% of total land mass used for agriculture. Here we examine the responses of Indian river invertebrate communities subjected to malathion, nutrients, and sediment additions in a semi-orthogonal design, in three sequential (through time) short-term (120 h) mesocosm experiments. Additionally, a series of single-species toxicity tests were run that used 24 h exposure and 72 h recovery to examine the sensitivity of 13 local invertebrate taxa to malathion, and 9 taxa to cypermethrin, comparing these results to those from other biogeographic regions. Mesocosm results indicate that malathion exposure had a major effect compared to other stressors on communities, with a lesser effect of nutrients and/or sediments. In mesocosms, taxa richness, total abundance and the abundance of sensitive species all declined associated with malathion concentrations. Comparisons of organism sensitivities from other geographic locations and those in the current paper suggest taxa in India are relatively tolerant to malathion and cypermethrin. Our results further reinforce that the high observed aquatic pesticide concentrations known to occur in Asian freshwater ecosystems are likely to be negatively affecting biodiversity, homogenising biota towards those most stress tolerant.
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Affiliation(s)
- Saurav Bhattacharyya
- Assam University, Silchar, Assam, India; DIMES, University of Calabria, Via Pietro Bucci, Cubo 42A, Rende, 87036, Italy
| | - Jon P Bray
- Centre for Applied Water Sciences, Institute for Applied Ecology, University of Canberra, Canberra, Australia; Department of Pest Management and Conservation, Lincoln University, PO Box 85084, Christchurch, Canterbury, New Zealand; The Centre for One Biosecurity Research, Analysis and Synthesis, Lincoln University, PO Box 85084, Christchurch, Canterbury, New Zealand.
| | | | | | - Susan J Nichols
- Centre for Applied Water Sciences, Institute for Applied Ecology, University of Canberra, Canberra, Australia
| | - Ben J Kefford
- Centre for Applied Water Sciences, Institute for Applied Ecology, University of Canberra, Canberra, Australia
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18
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Cedergreen N, Pedersen KE, Fredensborg BL. Quantifying synergistic interactions: a meta-analysis of joint effects of chemical and parasitic stressors. Sci Rep 2023; 13:13641. [PMID: 37608060 PMCID: PMC10444819 DOI: 10.1038/s41598-023-40847-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/17/2023] [Indexed: 08/24/2023] Open
Abstract
The global biodiversity crisis emphasizes our need to understand how different stressors (climatic, chemical, parasitic, etc.) interact and affect biological communities. We provide a comprehensive meta-analysis investigating joint effects of chemical and parasitic stressors for 1064 chemical-parasitic combinations using the Multiplicative model on mortality of arthropods. We tested both features of the experimental setup (control mortality, stressor effect level) and the chemical mode of action, host and parasite phylogeny, and parasite-host interaction traits as explanatory factors for deviations from the reference model. Synergistic interactions, defined as higher mortality than predicted, were significantly more frequent than no interactions or antagony. Experimental setup significantly affected the results, with studies reporting high (> 10%) control mortality or using low stressor effects (< 20%) being more synergistic. Chemical mode of action played a significant role for synergy, but there was no effects of host and parasite phylogeny, or parasite-host interaction traits. The finding that experimental design played a greater role in finding synergy than biological factors, emphasize the need to standardize the design of mixed stressor studies across scientific disciplines. In addition, combinations testing more biological traits e.g. avoidance, coping, and repair processes are needed to test biology-based hypotheses for synergistic interactions.
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Affiliation(s)
- Nina Cedergreen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
| | - Kathrine Eggers Pedersen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark
| | - Brian Lund Fredensborg
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg, Denmark.
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19
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Arranz I, Grenouillet G, Cucherousset J. Human pressures modulate climate-warming-induced changes in size spectra of stream fish communities. Nat Ecol Evol 2023; 7:1072-1078. [PMID: 37264200 DOI: 10.1038/s41559-023-02083-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 04/26/2023] [Indexed: 06/03/2023]
Abstract
Climate warming can negatively affect the body size of ectothermic organisms and, based on known temperature-size rules, tends to benefit small-bodied organisms. Our understanding of the interactive effects of climate warming and other environmental factors on the temporal changes of body size structure is limited. We quantified the annual trends in size spectra of 583 stream fish communities sampled for more than 20 years across France. The results show that climate warming steepened the slope of the community size spectrum in streams with limited impacts from other human pressures. These changes were caused by increasing abundance of small-bodied individuals and decreasing abundance of large-bodied individuals. However, opposite effects of climate warming on the size spectrum slopes were observed in streams facing high levels of other human pressures. This demonstrates that the effects of temperature on body size structure can depend on other human pressures, disrupting the natural patterns of size spectra in wild communities with potentially strong implications for the fluxes of energy and nutrients in ecosystems.
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Affiliation(s)
- Ignasi Arranz
- Laboratoire Evolution et Diversité Biologique UMR 5174, Université Toulouse III-Paul Sabatier, CNRS, IRD, Toulouse, France.
| | - Gaël Grenouillet
- Laboratoire Evolution et Diversité Biologique UMR 5174, Université Toulouse III-Paul Sabatier, CNRS, IRD, Toulouse, France
- Institut Universitaire de France, Paris, France
| | - Julien Cucherousset
- Laboratoire Evolution et Diversité Biologique UMR 5174, Université Toulouse III-Paul Sabatier, CNRS, IRD, Toulouse, France
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20
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Jorissen S, Janssens L, Verheyen J, Stoks R. Synergistic survival-related effects of larval exposure to an aquatic pollutant and food stress get stronger during and especially after metamorphosis and shape fitness of terrestrial adults. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 326:121471. [PMID: 36958652 DOI: 10.1016/j.envpol.2023.121471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 02/07/2023] [Accepted: 03/19/2023] [Indexed: 06/18/2023]
Abstract
To improve the ecological risk assessment of aquatic pollutants it is needed to study their effects not only in the aquatic larval stage, but also in the terrestrial adult stage of the many animals with a complex life cycle. This remains understudied, especially with regard to interactive effects between aquatic pollutants and natural abiotic stressors. We studied effects of exposure to the pesticide DNP (2,4-Dinitrophenol) and how these were modulated by limited food availability in the aquatic larvae, and the possible delayed effects in the terrestrial adults of the damselfly Lestes viridis. Our results revealed that DNP and low food each had large negative effects on the life history, behaviour and to a lesser extent on the physiology of not only the larvae, but also the adults. Food limitation magnified the negative effects of DNP as seen by a strong decline in larval survival, metamorphosis success and adult lifespan. Notably, the synergism between the aquatic pollutant and food limitation for survival-related traits was stronger in the non-exposed adults than in the exposed larvae, likely because metamorphosis is stressful itself. Our results highlight that identifying effects of aquatic pollutants and synergisms with natural abiotic stressors, not only in the aquatic larval but also in the terrestrial adult stage, is crucial to fully assess the ecological impact of aquatic pollutants and to reveal the impact on the receiving terrestrial ecosystem through a changed aquatic-terrestrial subsidy.
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Affiliation(s)
- Sarah Jorissen
- Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium.
| | - Lizanne Janssens
- Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium
| | - Julie Verheyen
- Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium
| | - Robby Stoks
- Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium
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21
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Vos M, Hering D, Gessner MO, Leese F, Schäfer RB, Tollrian R, Boenigk J, Haase P, Meckenstock R, Baikova D, Bayat H, Beermann A, Beisser D, Beszteri B, Birk S, Boden L, Brauer V, Brauns M, Buchner D, Burfeid-Castellanos A, David G, Deep A, Doliwa A, Dunthorn M, Enß J, Escobar-Sierra C, Feld CK, Fohrer N, Grabner D, Hadziomerovic U, Jähnig SC, Jochmann M, Khaliq S, Kiesel J, Kuppels A, Lampert KP, Le TTY, Lorenz AW, Madariaga GM, Meyer B, Pantel JH, Pimentel IM, Mayombo NS, Nguyen HH, Peters K, Pfeifer SM, Prati S, Probst AJ, Reiner D, Rolauffs P, Schlenker A, Schmidt TC, Shah M, Sieber G, Stach TL, Tielke AK, Vermiert AM, Weiss M, Weitere M, Sures B. The Asymmetric Response Concept explains ecological consequences of multiple stressor exposure and release. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 872:162196. [PMID: 36781140 DOI: 10.1016/j.scitotenv.2023.162196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/01/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Our capacity to predict trajectories of ecosystem degradation and recovery is limited, especially when impairments are caused by multiple stressors. Recovery may be fast or slow and either complete or partial, sometimes result in novel ecosystem states or even fail completely. Here, we introduce the Asymmetric Response Concept (ARC) that provides a basis for exploring and predicting the pace and magnitude of ecological responses to, and release from, multiple stressors. The ARC holds that three key mechanisms govern population, community and ecosystem trajectories. Stress tolerance is the main mechanism determining responses to increasing stressor intensity, whereas dispersal and biotic interactions predominantly govern responses to the release from stressors. The shifting importance of these mechanisms creates asymmetries between the ecological trajectories that follow increasing and decreasing stressor intensities. This recognition helps to understand multiple stressor impacts and to predict which measures will restore communities that are resistant to restoration.
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Affiliation(s)
- Matthijs Vos
- Ruhr University Bochum, Faculty of Biology and Biotechnology, Theoretical and Applied Biodiversity Research, Bochum, Germany
| | - Daniel Hering
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), Essen, Germany.
| | - Mark O Gessner
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany; Department of Ecology, Berlin Institute of Technology (TU Berlin), Berlin, Germany
| | - Florian Leese
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Aquatic Ecosystem Research, University of Duisburg-Essen, Essen, Germany
| | - Ralf B Schäfer
- Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
| | - Ralph Tollrian
- Department of Animal Ecology, Ruhr University Bochum, Evolution and Biodiversity, Germany
| | - Jens Boenigk
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Biodiversity, University of Duisburg-Essen, Essen, Germany
| | - Peter Haase
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany; Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Rainer Meckenstock
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Environmental Microbiology and Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Daria Baikova
- Environmental Microbiology and Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Helena Bayat
- Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
| | - Arne Beermann
- Aquatic Ecosystem Research, University of Duisburg-Essen, Essen, Germany
| | - Daniela Beisser
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Biodiversity, University of Duisburg-Essen, Essen, Germany
| | - Bánk Beszteri
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Phycology, University of Duisburg-Essen, Essen, Germany
| | - Sebastian Birk
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), Essen, Germany
| | - Lisa Boden
- Biodiversity, University of Duisburg-Essen, Essen, Germany
| | - Verena Brauer
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Environmental Microbiology and Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Mario Brauns
- Helmholtz Centre for Environmental Research - UFZ, Department River Ecology, Magdeburg, Germany
| | - Dominik Buchner
- Aquatic Ecosystem Research, University of Duisburg-Essen, Essen, Germany
| | | | - Gwendoline David
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany
| | - Aman Deep
- Biodiversity, University of Duisburg-Essen, Essen, Germany
| | - Annemie Doliwa
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
| | - Micah Dunthorn
- Eukaryotic Microbiology, University of Duisburg-Essen, Essen, Germany; Natural History Museum, University of Oslo, Oslo, Norway
| | - Julian Enß
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
| | | | - Christian K Feld
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), Essen, Germany
| | - Nicola Fohrer
- Department of Hydrology and Water Resources Management, Institute of Natural Resource Conservation, CAU Kiel, Germany
| | - Daniel Grabner
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), Essen, Germany
| | - Una Hadziomerovic
- Environmental Microbiology and Biotechnology, University of Duisburg-Essen, Essen, Germany
| | - Sonja C Jähnig
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Humboldt-Universität zu Berlin, Berlin, Germany
| | - Maik Jochmann
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Instrumental Analytical Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Shaista Khaliq
- Instrumental Analytical Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Jens Kiesel
- Department of Hydrology and Water Resources Management, Institute of Natural Resource Conservation, CAU Kiel, Germany
| | - Annabel Kuppels
- Ruhr University Bochum, Faculty of Biology and Biotechnology, Theoretical and Applied Biodiversity Research, Bochum, Germany
| | | | - T T Yen Le
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
| | - Armin W Lorenz
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
| | - Graciela Medina Madariaga
- Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Humboldt-Universität zu Berlin, Berlin, Germany
| | - Benjamin Meyer
- Aquatic Microbial Ecology, University of Duisburg-, Essen, Germany
| | - Jelena H Pantel
- Ecological Modelling, University of Duisburg-Essen, Essen, Germany
| | | | | | - Hong Hanh Nguyen
- Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany; Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Kristin Peters
- Department of Hydrology and Water Resources Management, Institute of Natural Resource Conservation, CAU Kiel, Germany
| | | | - Sebastian Prati
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
| | | | - Dominik Reiner
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
| | - Peter Rolauffs
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany
| | - Alexandra Schlenker
- Helmholtz Centre for Environmental Research - UFZ, Department River Ecology, Magdeburg, Germany
| | - Torsten C Schmidt
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Instrumental Analytical Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Manan Shah
- Biodiversity, University of Duisburg-Essen, Essen, Germany; Aquatic Microbial Ecology, University of Duisburg-, Essen, Germany
| | - Guido Sieber
- Biodiversity, University of Duisburg-Essen, Essen, Germany
| | | | - Ann-Kathrin Tielke
- Ruhr University Bochum, Faculty of Biology and Biotechnology, Theoretical and Applied Biodiversity Research, Bochum, Germany
| | - Anna-Maria Vermiert
- Department of Animal Ecology, Ruhr University Bochum, Evolution and Biodiversity, Germany
| | - Martina Weiss
- Centre for Water and Environmental Research (ZWU), Essen, Germany; Aquatic Ecosystem Research, University of Duisburg-Essen, Essen, Germany
| | - Markus Weitere
- Helmholtz Centre for Environmental Research - UFZ, Department River Ecology, Magdeburg, Germany
| | - Bernd Sures
- Aquatic Ecology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), Essen, Germany
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22
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Lourenço J, Gutiérrez-Cánovas C, Carvalho F, Cássio F, Pascoal C, Pace G. Non-interactive effects drive multiple stressor impacts on the taxonomic and functional diversity of atlantic stream macroinvertebrates. ENVIRONMENTAL RESEARCH 2023; 229:115965. [PMID: 37105281 DOI: 10.1016/j.envres.2023.115965] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 03/18/2023] [Accepted: 04/19/2023] [Indexed: 05/05/2023]
Abstract
Freshwaters are considered among the most endangered ecosystems globally due to multiple stressors, which coincide in time and space. These local stressors typically result from land-use intensification or hydroclimatic alterations, among others. Despite recent advances on multiple stressor effects, current knowledge is still limited to manipulative approaches minimizing biological and abiotic variability. Thus, the assessment of multiple stressor effects in real-world ecosystems is required. Using an extensive survey of 50 stream reaches across North Portugal, we evaluated taxonomic and functional macroinvertebrate responses to multiple stressors, including marked gradients of nutrient enrichment, flow reduction, riparian vegetation structure, thermal stress and dissolved oxygen depletion. We analyzed multiple stressor effects on two taxonomic (taxon richness, Shannon-diversity) and two trait-based diversity indices (functional richness, functional dispersion), as well as changes in trait composition. We found that multiple stressors had additive effects on all diversity metrics, with nutrient enrichment identified as the most important stressor in three out of four metrics, followed by dissolved oxygen depletion and thermal stress. Taxon richness, Shannon-diversity and functional richness responded similarly, whereas functional dispersion was driven by changes in flow velocity and thermal stress. Functional trait composition changed along a major stress gradient determined by nutrient enrichment and oxygen depletion, which was positively correlated with organisms possessing fast-living strategies, aerial respiration, adult phases, and gathering-collector feeding habits. Overall, our results reinforce the need to consider complementary facets of biodiversity to better identify assembly processes in response to multiple stressors. Our data suggest that stressor interactions may be less frequent in real-word streams than predicted by manipulative experiments, which can facilitate mitigation strategies. By combining an extensive field survey with an integrative consideration of multiple biodiversity facets, our study provides new insights that can help to better assess and manage rivers in a global change context.
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Affiliation(s)
- J Lourenço
- Centre of Molecular and Environmental Biology (CBMA) / Aquatic Research Network (ARNET) Associate Laboratory, Department of Biology, University of Minho, Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Braga, Portugal.
| | - C Gutiérrez-Cánovas
- Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933, Móstoles, Madrid, Spain
| | - F Carvalho
- Centre of Molecular and Environmental Biology (CBMA) / Aquatic Research Network (ARNET) Associate Laboratory, Department of Biology, University of Minho, Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Braga, Portugal
| | - F Cássio
- Centre of Molecular and Environmental Biology (CBMA) / Aquatic Research Network (ARNET) Associate Laboratory, Department of Biology, University of Minho, Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Braga, Portugal
| | - C Pascoal
- Centre of Molecular and Environmental Biology (CBMA) / Aquatic Research Network (ARNET) Associate Laboratory, Department of Biology, University of Minho, Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Braga, Portugal
| | - G Pace
- Centre of Molecular and Environmental Biology (CBMA) / Aquatic Research Network (ARNET) Associate Laboratory, Department of Biology, University of Minho, Braga, Portugal; Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Braga, Portugal
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23
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Cooke SJ, Madliger CL, Lennox RJ, Olden JD, Eliason EJ, Cramp RL, Fuller A, Franklin CE, Seebacher F. Biological mechanisms matter in contemporary wildlife conservation. iScience 2023; 26:106192. [PMID: 36895647 PMCID: PMC9988666 DOI: 10.1016/j.isci.2023.106192] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Given limited resources for wildlife conservation paired with an urgency to halt declines and rebuild populations, it is imperative that management actions are tactical and effective. Mechanisms are about how a system works and can inform threat identification and mitigation such that conservation actions that work can be identified. Here, we call for a more mechanistic approach to wildlife conservation and management where behavioral and physiological tools and knowledge are used to characterize drivers of decline, identify environmental thresholds, reveal strategies that would restore populations, and prioritize conservation actions. With a growing toolbox for doing mechanistic conservation research as well as a suite of decision-support tools (e.g., mechanistic models), the time is now to fully embrace the concept that mechanisms matter in conservation ensuring that management actions are tactical and focus on actions that have the potential to directly benefit and restore wildlife populations.
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Affiliation(s)
- Steven J. Cooke
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental and Interdisciplinary Science, Carleton University, 1125 Colonel By Dr., Ottawa, ON K1S 5B6, Canada
- Corresponding author
| | - Christine L. Madliger
- Department of Biology, Algoma University, 1520 Queen St. East, Sault Ste. Marie, ON P6A 2G4, Canada
| | - Robert J. Lennox
- Norwegian Research Centre (NORCE), Laboratory for Freshwater Ecology and Inland Fisheries, 5008 Bergen, Norway
| | - Julian D. Olden
- School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195-5020, USA
| | - Erika J. Eliason
- Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
| | - Rebecca L. Cramp
- School of Biological Sciences, University of Queensland, Brisbane, QLD 4072, Australia
| | - Andrea Fuller
- Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Parktown 2193, South Africa
| | - Craig E. Franklin
- School of Biological Sciences, University of Queensland, Brisbane, QLD 4072, Australia
| | - Frank Seebacher
- School of Life and Environmental Sciences A08, University of Sydney, Sydney, NSW 2006, Australia
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24
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Verheyen J, Stoks R. Thermal Performance Curves in a Polluted World: Too Cold and Too Hot Temperatures Synergistically Increase Pesticide Toxicity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3270-3279. [PMID: 36787409 DOI: 10.1021/acs.est.2c07567] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Ecotoxicological studies typically cover only a limited part of the natural thermal range of populations and ignore daily temperature fluctuations (DTFs). Therefore, we may miss important stressor interaction patterns and have poor knowledge on how pollutants affect thermal performance curves (TPCs), which is needed to improve insights into the fate of populations to warming in a polluted world. We tested the single and combined effects of pesticide exposure and DTFs on the TPCs of low- and high-latitude populations of Ischnura elegans damselfly larvae. While chlorpyrifos did not have any effect at the intermediate mean temperatures (20-24 °C), it became toxic (reflecting synergisms) at lower (≤16 °C, reduced growth) and especially at higher (≥28 °C, reduced survival and growth) mean temperatures, resulting in more concave-shaped TPCs. Remarkably, these toxicity patterns were largely consistent at both latitudes and hence across a natural thermal gradient. Moreover, DTFs magnified the pesticide-induced survival reductions at 34 °C. The TPC perspective allowed us to identify different toxicity patterns and interaction types (mainly additive vs synergistic) across the thermal gradient. This highlights the importance of using thermal gradients to make more realistic predictions about the impact of pesticides in a warming world and of warming in a polluted world.
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Affiliation(s)
- Julie Verheyen
- Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium
| | - Robby Stoks
- Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium
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25
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Sun S, Dziuba MK, Jaye RN, Duffy MA. Transgenerational plasticity in a zooplankton in response to elevated temperature and parasitism. Ecol Evol 2023; 13:e9767. [PMID: 36760704 PMCID: PMC9897957 DOI: 10.1002/ece3.9767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 02/05/2023] Open
Abstract
Organisms are increasingly facing multiple stressors, which can simultaneously interact to cause unpredictable impacts compared with a single stressor alone. Recent evidence suggests that phenotypic plasticity can allow for rapid responses to altered environments, including biotic and abiotic stressors, both within a generation and across generations (transgenerational plasticity). Parents can potentially "prime" their offspring to better cope with similar stressors or, alternatively, might produce offspring that are less fit because of energetic constraints. At present, it remains unclear exactly how biotic and abiotic stressors jointly mediate the responses of transgenerational plasticity and whether this plasticity is adaptive. Here, we test the effects of biotic and abiotic environmental changes on within- and transgenerational plasticity using a Daphnia-Metschnikowia zooplankton-fungal parasite system. By exposing parents and their offspring consecutively to the single and combined effects of elevated temperature and parasite infection, we showed that transgenerational plasticity induced by temperature and parasite stress influenced host fecundity and lifespan; offsprings of mothers who were exposed to one of the stressors were better able to tolerate elevated temperature, compared with the offspring of mothers who were exposed to neither or both stressors. Yet, the negative effects caused by parasite infection were much stronger, and this greater reduction in host fitness was not mitigated by transgenerational plasticity. We also showed that elevated temperature led to a lower average immune response, and that the relationship between immune response and lifetime fecundity reversed under elevated temperature: the daughters of exposed mothers showed decreased fecundity with increased hemocyte production at ambient temperature but the opposite relationship at elevated temperature. Together, our results highlight the need to address questions at the interface of multiple stressors and transgenerational plasticity and the importance of considering multiple fitness-associated traits when evaluating the adaptive value of transgenerational plasticity under changing environments.
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Affiliation(s)
- Syuan‐Jyun Sun
- Department of Ecology and Evolutionary BiologyUniversity of MichiganAnn ArborMichiganUSA,International Degree Program in Climate Change and Sustainable DevelopmentNational Taiwan UniversityTaipeiTaiwan
| | - Marcin K. Dziuba
- Department of Ecology and Evolutionary BiologyUniversity of MichiganAnn ArborMichiganUSA
| | - Riley N. Jaye
- Department of Ecology and Evolutionary BiologyUniversity of MichiganAnn ArborMichiganUSA
| | - Meghan A. Duffy
- Department of Ecology and Evolutionary BiologyUniversity of MichiganAnn ArborMichiganUSA
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26
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Beckerman AP. The context dependency of multiple stressor effects on biodiversity: A commentary on Kefford et al. (2022). GLOBAL CHANGE BIOLOGY 2023; 29:563-565. [PMID: 36300879 PMCID: PMC10091756 DOI: 10.1111/gcb.16483] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Affiliation(s)
- Andrew P. Beckerman
- School of Biosciences, Ecology and Evolutionary BiologyThe University of SheffieldSheffieldUK
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27
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Kefford BJ, Nichols SJ, Duncan RP. The cumulative impacts of anthropogenic stressors vary markedly along environmental gradients. GLOBAL CHANGE BIOLOGY 2023; 29:590-602. [PMID: 36114730 PMCID: PMC10087255 DOI: 10.1111/gcb.16435] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/21/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Understanding the cumulative effects of multiple stressors on biodiversity is key to managing their impacts. Stressor interactions are often studied using an additive/antagonistic/synergistic typology, aimed at identifying situations where individual stressor effects are reduced or amplified when they act in combination. Here, we analysed variation in the family richness of stream macroinvertebrates in the groups Ephemeroptera, Plecoptera and Trichoptera (EPT) at 4658 sites spanning a 32° latitudinal range in eastern Australia in relation to two largely human-induced stressors, salinity and turbidity, and two environmental gradients, temperature and slope. The cumulative and interactive effect of salinity and turbidity on EPT family richness varied across the landscape and by habitat (edge or riffle) such that we observed additive, antagonistic and synergistic outcomes depending on the environmental context. Our findings highlight the importance of understanding the consistency of multiple stressor impacts, which will involve higher-order interactions between multiple stressors and environmental factors.
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Affiliation(s)
- Ben J. Kefford
- Centre for Applied Water ScienceInstitute for Applied Ecology, University of CanberraCanberraAustralian Capital TerritoryAustralia
| | - Susan J. Nichols
- Centre for Applied Water ScienceInstitute for Applied Ecology, University of CanberraCanberraAustralian Capital TerritoryAustralia
| | - Richard P. Duncan
- Centre for Conservation Ecology and GenomicsInstitute for Applied Ecology, University of CanberraCanberraAustralian Capital TerritoryAustralia
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28
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Number of simultaneously acting global change factors affects composition, diversity and productivity of grassland plant communities. Nat Commun 2022; 13:7811. [PMID: 36535931 PMCID: PMC9763497 DOI: 10.1038/s41467-022-35473-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 12/06/2022] [Indexed: 12/23/2022] Open
Abstract
Plant communities experience impacts of increasing numbers of global change factors (e.g., warming, eutrophication, pollution). Consequently, unpredictable global change effects could arise. However, information about multi-factor effects on plant communities is scarce. To test plant-community responses to multiple global change factors (GCFs), we subjected sown and transplanted-seedling communities to increasing numbers (0, 1, 2, 4, 6) of co-acting GCFs, and assessed effects of individual factors and increasing numbers of GCFs on community composition and productivity. GCF number reduced species diversity and evenness of both community types, whereas none of the individual factors alone affected these measures. In contrast, GCF number positively affected the productivity of the transplanted-seedling community. Our findings show that simultaneously acting GCFs can affect plant communities in ways differing from those expected from single factor effects, which may be due to biological effects, sampling effects, or both. Consequently, exploring the multifactorial nature of global change is crucial to better understand ecological impacts of global change.
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29
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Qu Y, Wu N, Guse B, Fohrer N. Distinct indicators of land use and hydrology characterize different aspects of riverine phytoplankton communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158209. [PMID: 36049691 DOI: 10.1016/j.scitotenv.2022.158209] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
Given the many threats to freshwater biodiversity, we need to be able to resolve which of the multiple stressors present in rivers are most important in driving change. Phytoplankton are a key component of the aquatic ecosystem, their abundance, species richness and functional richness are important indicators of ecosystem health. In this study, spatial variables, physiochemical conditions, water flow alterations and land use patterns were considered as the joint stressors from a lowland rural catchment. A modeling approach combining an ecohydrological model with machine learning was applied. The results implied that land use and flow regime, rather than nutrients, were most important in explaining differences in the phytoplankton community. In particular, the percentage of water body area and medium level residential urban area were key to driving the rising phytoplankton abundance in this rural catchment. The proportion of forest and pasture area were the leading factors controlling the variations of species richness. In this case deciduous forest cover affected the species richness in a positive way, while, pasture share had a negative effect. Indicators of hydrological alteration were found to be the best predictors for the differences in functional richness. This integrated model framework was found to be suitable for analysis of complex environmental conditions in river basin management. A key message would be the significance of forest area preservation and ecohydrological restoration in maintaining both phytoplankton richness and their functional role in river ecosystems.
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Affiliation(s)
- Yueming Qu
- Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, Kiel, Germany; UK Centre for Ecology and Hydrology, Wallingford, United Kingdom.
| | - Naicheng Wu
- Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, Kiel, Germany; Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo, China.
| | - Björn Guse
- Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, Kiel, Germany; Section Hydrology, GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - Nicola Fohrer
- Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, Kiel, Germany
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30
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Tyack PL, Thomas L, Costa DP, Hall AJ, Harris CM, Harwood J, Kraus SD, Miller PJO, Moore M, Photopoulou T, Pirotta E, Rolland RM, Schwacke LH, Simmons SE, Southall BL. Managing the effects of multiple stressors on wildlife populations in their ecosystems: developing a cumulative risk approach. Proc Biol Sci 2022; 289:20222058. [PMID: 36448280 PMCID: PMC9709579 DOI: 10.1098/rspb.2022.2058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Assessing cumulative effects of human activities on ecosystems is required by many jurisdictions, but current science cannot meet regulatory demands. Regulations define them as effect(s) of one human action combined with other actions. Here we argue for an approach that evaluates the cumulative risk of multiple stressors for protected wildlife populations within their ecosystems. Monitoring effects of each stressor is necessary but not sufficient to estimate how multiple stressors interact to affect wildlife populations. Examining the mechanistic pathways, from cellular to ecological, by which stressors affect individuals can help prioritize stressors and interpret how they interact. Our approach uses health indicators to accumulate the effects of stressors on individuals and to estimate changes in vital rates, driving population status. We advocate using methods well-established in human health and integrating them into ecosystem-based management to protect the health of commercially and culturally important wildlife populations and to protect against risk of extinction for threatened species. Our approach will improve abilities to conserve and manage ecosystems but will also demand significant increases in research and monitoring effort. We advocate for increased investment proportional to the economic scale of human activities in the Anthropocene and their pervasive effects on ecology and biodiversity.
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Affiliation(s)
- Peter L Tyack
- Sea Mammal Research Unit, School of Biology, Scottish Oceans Institute, University of St Andrews, St Andrews, UK
| | - Len Thomas
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK
| | - Daniel P Costa
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, USA.,Institute of Marine Sciences, University of California, Santa Cruz, CA, USA
| | - Ailsa J Hall
- Sea Mammal Research Unit, School of Biology, Scottish Oceans Institute, University of St Andrews, St Andrews, UK
| | - Catriona M Harris
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK
| | - John Harwood
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK
| | - Scott D Kraus
- Anderson-Cabot Center for Ocean Life, New England Aquarium, Boston, MA, USA
| | - Patrick J O Miller
- Sea Mammal Research Unit, School of Biology, Scottish Oceans Institute, University of St Andrews, St Andrews, UK
| | - Michael Moore
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
| | - Theoni Photopoulou
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK
| | - Enrico Pirotta
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK
| | - Rosalind M Rolland
- Anderson-Cabot Center for Ocean Life, New England Aquarium, Boston, MA, USA
| | | | - Samantha E Simmons
- SMRU Consulting, Scottish Oceans Institute, University of St Andrews, St Andrews, UK
| | - Brandon L Southall
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, USA.,Southall Environmental Associates, Inc., Aptos, CA, USA
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31
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Morris OF, Loewen CJG, Woodward G, Schäfer RB, Piggott JJ, Vinebrooke RD, Jackson MC. Local stressors mask the effects of warming in freshwater ecosystems. Ecol Lett 2022; 25:2540-2551. [PMID: 36161435 PMCID: PMC9826496 DOI: 10.1111/ele.14108] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 08/11/2022] [Accepted: 08/11/2022] [Indexed: 01/11/2023]
Abstract
Climate warming is a ubiquitous stressor in freshwater ecosystems, yet its interactive effects with other stressors are poorly understood. We address this knowledge gap by testing the ability of three contrasting null models to predict the joint impacts of warming and a range of other aquatic stressors using a new database of 296 experimental combinations. Despite concerns that stressors will interact to cause synergisms, we found that net impacts were usually best explained by the effect of the stronger stressor alone (the dominance null model), especially if this stressor was a local disturbance associated with human land use. Prediction accuracy depended on stressor identity and how asymmetric stressors were in the magnitude of their effects. These findings suggest we can effectively predict the impacts of multiple stressors by focusing on the stronger stressor, as habitat alteration, nutrients and contamination often override the biological consequences of higher temperatures in freshwater ecosystems.
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Affiliation(s)
- Olivia F. Morris
- Georgina Mace Centre for the Living PlanetDepartment of Life SciencesSilwood Park CampusImperial College LondonBerkshireUK
| | - Charlie J. G. Loewen
- Department of Ecology and Evolutionary BiologyUniversity of TorontoTorontoCanada
| | - Guy Woodward
- Georgina Mace Centre for the Living PlanetDepartment of Life SciencesSilwood Park CampusImperial College LondonBerkshireUK
| | - Ralf B. Schäfer
- Institute for Environmental SciencesUniversity Koblenz‐LandauLandau in der PfalzGermany
| | - Jeremy J. Piggott
- Department of ZoologyTrinity College DublinThe University of DublinDublinIreland
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32
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Bart S, Short S, Jager T, Eagles EJ, Robinson A, Badder C, Lahive E, Spurgeon DJ, Ashauer R. How to analyse and account for interactions in mixture toxicity with toxicokinetic-toxicodynamic models. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 843:157048. [PMID: 35779734 DOI: 10.1016/j.scitotenv.2022.157048] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/20/2022] [Accepted: 06/25/2022] [Indexed: 05/28/2023]
Abstract
The assessment of chemical mixture toxicity is one of the major challenges in ecotoxicology. Chemicals can interact, leading to more or less effects than expected, commonly named synergism and antagonism respectively. The classic ad hoc approach for the assessment of mixture effects is based on dose-response curves at a single time point, and is limited to identifying a mixture interaction but cannot provide predictions for untested exposure durations, nor for scenarios where exposure varies in time. We here propose a new approach using toxicokinetic-toxicodynamic modelling: The General Unified Threshold model of Survival (GUTS) framework, recently extended for mixture toxicity assessment. We designed a dedicated mechanistic interaction module coupled with the GUTS mixture model to i) identify interactions, ii) test hypotheses to identify which chemical is likely responsible for the interaction, and finally iii) simulate and predict the effect of synergistic and antagonistic mixtures. We tested the modelling approach experimentally with two species (Enchytraeus crypticus and Mamestra brassicae) exposed to different potentially synergistic mixtures (composed of: prochloraz, imidacloprid, cypermethrin, azoxystrobin, chlorothalonil, and chlorpyrifos). Furthermore, we also tested the model with previously published experimental data on two other species (Bombus terrestris and Daphnia magna) exposed to pesticide mixtures (clothianidin, propiconazole, dimethoate, imidacloprid and thiacloprid) found to be synergistic or antagonistic with the classic approach. The results showed an accurate simulation of synergistic and antagonistic effects for the different tested species and mixtures. This modelling approach can identify interactions accounting for the entire time of exposure, and not only at one time point as in the classic approach, and provides predictions of the mixture effect for untested mixture exposure scenarios, including those with time-variable mixture composition.
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Affiliation(s)
- Sylvain Bart
- Department of Environment and Geography, University of York, Heslington, York YO10 5NG, UK; UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK; MO-ECO(2) (Modelling and data analyses for ecology and ecotoxicology), Paris, France.
| | - Stephen Short
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK; Cardiff School of Biosciences, BIOSI 1, University of Cardiff, P.O. Box 915, Cardiff CF10 3TL, UK
| | | | - Emily J Eagles
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
| | - Alex Robinson
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
| | - Claire Badder
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK; Cardiff School of Biosciences, BIOSI 1, University of Cardiff, P.O. Box 915, Cardiff CF10 3TL, UK
| | - Elma Lahive
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
| | - David J Spurgeon
- UK Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Wallingford, Oxfordshire OX10 8BB, UK
| | - Roman Ashauer
- Department of Environment and Geography, University of York, Heslington, York YO10 5NG, UK; Syngenta Crop Protection AG, Basel, Switzerland
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Holzinger A, Mair MM, Lücker D, Seidenath D, Opel T, Langhof N, Otti O, Feldhaar H. Comparison of fitness effects in the earthworm Eisenia fetida after exposure to single or multiple anthropogenic pollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156387. [PMID: 35660620 DOI: 10.1016/j.scitotenv.2022.156387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/25/2022] [Accepted: 05/28/2022] [Indexed: 05/16/2023]
Abstract
Terrestrial ecosystems are exposed to many anthropogenic pollutants. Non-target effects of pesticides and fertilizers have put agricultural intensification in the focus as a driver for biodiversity loss. However, other pollutants, such as heavy metals, particulate matter, or microplastic also enter the environment, e.g. via traffic and industrial activities in urban areas. As soil acts as a potential sink for such pollutants, soil invertebrates like earthworms may be particularly affected by them. Under natural conditions soil invertebrates will likely be exposed to combinations of pollutants simultaneously, which may result in stronger negative effects if pollutants act synergistically. Within this work we study how multiple pollutants affect the soil-dwelling, substrate feeding earthworm Eisenia fetida. We compared the effects of the single stressors, polystyrene microplastic fragments, polystyrene fibers, brake dust and carbon black, with the combined effect of these pollutants when applied as a mixture. Endpoints measured were survival, increase in body weight, reproductive fitness, and changes in three oxidative stress markers (glutathione S-transferase, catalase and malondialdehyde). We found that among single pollutant treatments, brake dust imposed the strongest negative effects on earthworms in all measured endpoints including increased mortality rates. Sub-lethal effects were found for all pollutants. Exposing earthworms to all four pollutants simultaneously led to effects on mortality and oxidative stress markers that were smaller than expected by the respective null models. These antagonistic effects are likely a result of the adsorption of toxic substances found in brake dust to the other pollutants. With this study we show that effects of combinations of pollutants cannot necessarily be predicted from their individual effects and that combined effects will likely depend on identity and concentration of the pollutants.
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Affiliation(s)
- Anja Holzinger
- Animal Population Ecology, Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Magdalena M Mair
- Statistical Ecotoxicology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany.
| | - Darleen Lücker
- Animal Population Ecology, Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Dimitri Seidenath
- Animal Population Ecology, Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Thorsten Opel
- Department of Ceramic Materials Engineering, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Nico Langhof
- Department of Ceramic Materials Engineering, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Oliver Otti
- Animal Population Ecology, Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Heike Feldhaar
- Animal Population Ecology, Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
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35
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Burgess BJ, Jackson MC, Murrell DJ. Are experiment sample sizes adequate to detect biologically important interactions between multiple stressors? Ecol Evol 2022. [PMID: 36177120 DOI: 10.1101/2021.07.21.453207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023] Open
Abstract
As most ecosystems are being challenged by multiple, co-occurring stressors, an important challenge is to understand and predict how stressors interact to affect biological responses. A popular approach is to design factorial experiments that measure biological responses to pairs of stressors and compare the observed response to a null model expectation. Unfortunately, we believe experiment sample sizes are inadequate to detect most non-null stressor interaction responses, greatly hindering progress. Using both real and simulated data, we show sample sizes typical of many experiments (<6) can (i) only detect very large deviations from the additive null model, implying many important non-null stressor-pair interactions are being missed, and (ii) potentially lead to mostly statistical outliers being reported. Computer code that simulates data under either additive or multiplicative null models is provided to estimate statistical power for user-defined responses and sample sizes, and we recommend this is used to aid experimental design and interpretation of results. We suspect that most experiments may require 20 or more replicates per treatment to have adequate power to detect nonadditive. However, estimates of power need to be made while considering the smallest interaction of interest, i.e., the lower limit for a biologically important interaction, which is likely to be system-specific, meaning a general guide is unavailable. We discuss ways in which the smallest interaction of interest can be chosen, and how sample sizes can be increased. Our main analyses relate to the additive null model, but we show similar problems occur for the multiplicative null model, and we encourage similar investigations into the statistical power of other null models and inference methods. Without knowledge of the detection abilities of the statistical tools at hand or the definition of the smallest meaningful interaction, we will undoubtedly continue to miss important ecosystem stressor interactions.
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Affiliation(s)
- Benjamin J Burgess
- Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment University College London London UK
- RTI Health Solutions Didsbury, Manchester UK
| | | | - David J Murrell
- Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment University College London London UK
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36
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Burgess BJ, Jackson MC, Murrell DJ. Are experiment sample sizes adequate to detect biologically important interactions between multiple stressors? Ecol Evol 2022; 12:e9289. [PMID: 36177120 PMCID: PMC9475135 DOI: 10.1002/ece3.9289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 08/05/2022] [Accepted: 08/22/2022] [Indexed: 11/29/2022] Open
Abstract
As most ecosystems are being challenged by multiple, co‐occurring stressors, an important challenge is to understand and predict how stressors interact to affect biological responses. A popular approach is to design factorial experiments that measure biological responses to pairs of stressors and compare the observed response to a null model expectation. Unfortunately, we believe experiment sample sizes are inadequate to detect most non‐null stressor interaction responses, greatly hindering progress. Using both real and simulated data, we show sample sizes typical of many experiments (<6) can (i) only detect very large deviations from the additive null model, implying many important non‐null stressor‐pair interactions are being missed, and (ii) potentially lead to mostly statistical outliers being reported. Computer code that simulates data under either additive or multiplicative null models is provided to estimate statistical power for user‐defined responses and sample sizes, and we recommend this is used to aid experimental design and interpretation of results. We suspect that most experiments may require 20 or more replicates per treatment to have adequate power to detect nonadditive. However, estimates of power need to be made while considering the smallest interaction of interest, i.e., the lower limit for a biologically important interaction, which is likely to be system‐specific, meaning a general guide is unavailable. We discuss ways in which the smallest interaction of interest can be chosen, and how sample sizes can be increased. Our main analyses relate to the additive null model, but we show similar problems occur for the multiplicative null model, and we encourage similar investigations into the statistical power of other null models and inference methods. Without knowledge of the detection abilities of the statistical tools at hand or the definition of the smallest meaningful interaction, we will undoubtedly continue to miss important ecosystem stressor interactions.
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Affiliation(s)
- Benjamin J Burgess
- Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment University College London London UK.,RTI Health Solutions Didsbury, Manchester UK
| | | | - David J Murrell
- Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment University College London London UK
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37
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Vlaeminck K, Viaene KPJ, Van Sprang P, De Schamphelaere KAC. Predicting Combined Effects of Chemical Stressors: Population-Level Effects of Organic Chemical Mixtures with a Dynamic Energy Budget Individual-Based Model. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:2240-2258. [PMID: 35723450 DOI: 10.1002/etc.5409] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/11/2022] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
Most regulatory ecological risk-assessment frameworks largely disregard discrepancies between the laboratory, where effects of single substances are assessed on individual organisms, and the real environment, where organisms live together in populations and are often exposed to multiple simultaneously occurring substances. We assessed the capability of individual-based models (IBMs) with a foundation in the dynamic energy budget (DEB) theory to predict combined effects of chemical mixtures on populations when they are calibrated on toxicity data of single substances at the individual level only. We calibrated a DEB-IBM for Daphnia magna for four compounds (pyrene, dicofol, α-hexachlorocyclohexane, and endosulfan), covering different physiological modes of action. We then performed a 17-week population experiment with D. magna (designed using the DEB-IBM), in which we tested mixture combinations of these chemicals at relevant concentrations, in a constant exposure phase (7-week exposure and recovery), followed by a pulsed exposure phase (3-day pulse exposure and recovery). The DEB-IBM was validated by comparing blind predictions of mixture toxicity effects with the population data. The DEB-IBM accurately predicted mixture toxicity effects on population abundance in both phases when assuming independent action at the effect mechanism level. The population recovery after the constant exposure was well predicted, but recovery after the pulse was not. The latter could be related to insufficient consideration of stochasticity in experimental design, model implementation, or both. Importantly, the mechanistic DEB-IBM performed better than conventional statistical mixture assessment methods. We conclude that the DEB-IBM, calibrated using only single-substance individual-level toxicity data, produces accurate predictions of population-level mixture effects and can therefore provide meaningful contributions to ecological risk assessment of environmentally realistic mixture exposure scenarios. Environ Toxicol Chem 2022;41:2240-2258. © 2022 SETAC.
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Affiliation(s)
- Karel Vlaeminck
- Laboratory of Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit (GhEnToxLab), Ghent University (UGent), Campus Coupure, Ghent, Belgium
- Assessing Risks of Chemicals (ARCHE) Consulting, Ghent, Wondelgem, Belgium
| | - Karel P J Viaene
- Assessing Risks of Chemicals (ARCHE) Consulting, Ghent, Wondelgem, Belgium
| | - Patrick Van Sprang
- Assessing Risks of Chemicals (ARCHE) Consulting, Ghent, Wondelgem, Belgium
| | - Karel A C De Schamphelaere
- Laboratory of Environmental Toxicology and Aquatic Ecology, Environmental Toxicology Unit (GhEnToxLab), Ghent University (UGent), Campus Coupure, Ghent, Belgium
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38
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Delnat V, Verheyen J, Van Hileghem I, Stoks R. Genetic variation of the interaction type between two stressors in a single population: From antagonism to synergism when combining a heat spike and a pesticide. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 308:119654. [PMID: 35738518 DOI: 10.1016/j.envpol.2022.119654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/27/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Despite the surging interest in the interactions between toxicants and non-chemical stressors, and in evolutionary ecotoxicology, we have poor knowledge whether these patterns differ among genotypes within a population. Warming and toxicants are two widespread stressors in aquatic systems that are known to modify each other's effects. We studied to what extent effects of sequential exposure to a heat spike and the pesticide esfenvalerate differed among genotypes in the water flea Daphnia magna. Esfenvalerate had similar negative effects on survival and body size across genotypes, and for most genotypes it increased time to maturation, yet the effects on the reproductive performance were only detected in some genotypes and were inconsistent in direction. Across genotypes, the heat spike increased the heat tolerance, yet the negative effects of the heat spike on survival, reproductive performance and body size, and the positive effects on grazing rate and the shortened time to maturation were only seen in some genotypes. Notably, the interaction type between both stressors differed among genotypes. In contrast to our expectation, the impact of esfenvalerate was only magnified by the heat spike in some genotypes and only for a subset of the traits. For survival and time to maturation, the interaction type for the same stressor combination covered all three categories: additions, synergisms and antagonisms. This illustrates that categorizing the interaction type between stressors at the level of populations may hide considerable intrapopulation variation among genotypes. Opposite to our expectation, the more pesticide-tolerant genotypes showed a stronger synergism between both stressors. Genotype-dependent interaction patterns between toxicants and non-chemical stressors may explain inconsistencies among studies and challenges ecological risk assessment based on single genotypes. The observed genetic differences in the responses to the (combined) stressors may fuel the evolution of the stressor interaction pattern, a largely ignored topic in evolutionary ecotoxicology.
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Affiliation(s)
- Vienna Delnat
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium
| | - Julie Verheyen
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium.
| | - Ine Van Hileghem
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium
| | - Robby Stoks
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000, Leuven, Belgium
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Truong KN, Vu N, Doan NX, Bui CV, Le M, Vu MTT, Dinh KV. Transgenerational exposure to marine heatwaves ameliorates the lethal effect on tropical copepods regardless of predation stress. Ecol Evol 2022; 12:e9149. [PMID: 35949526 PMCID: PMC9350982 DOI: 10.1002/ece3.9149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/21/2022] [Accepted: 07/04/2022] [Indexed: 12/02/2022] Open
Abstract
Marine heatwaves (MHWs) are emerging as a severe stressor in marine ecosystems. Extreme warm sea surface temperatures during MHWs often exceed the optimal thermal range for more than one generation of tropical coastal zooplankton. However, it is relatively unknown whether transgenerational plasticity (TGP) to MHWs may shape the offspring's fitness, particularly in an ecologically relevant context with biotic interactions such as predation stress. We addressed these novel research questions by determining the survival, reproductive success, and grazing rate of the copepod Pseudodiaptomus incisus exposed to MHW and fish predator cues (FPC) for two generations (F1 and F2). The experiment was designed in a full orthogonal manner with 4 treatments in F1 and 16 treatments in F2 generation. In both generations, MHW reduced P. incisus survival, reproductive parameters, and grazing by 10%–62% in MHW, but these parameters increased by 2%–15% with exposure to FPC, particularly at control temperature. F2 reproductive success and grazing rate as indicated by cumulative fecal pellets were reduced by 20%–30% in F1‐MHW, but increased by ~2% in F1‐FPC. Strikingly, MHW exposure reduced 17%–18% survival, but transgenerational exposure to MHWs fully ameliorated its lethal effect and this transgenerational effect was independent of FPC. Increased survival came with a cost of reduced reproductive success, constrained by reduced grazing. The rapid transgenerational MHW acclimation and its associated costs are likely widespread and crucial mechanisms underlying the resilience of coastal tropical zooplankton to MHWs in tropical coastal marine ecosystems.
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Affiliation(s)
- Kiem N. Truong
- Department of Ecology University of Science, Vietnam National University Hanoi Vietnam
| | - Ngoc‐Anh Vu
- Department of Ecology University of Science, Vietnam National University Hanoi Vietnam
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture Nha Trang University Nha Trang City Vietnam
| | - Nam X. Doan
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture Nha Trang University Nha Trang City Vietnam
| | - Canh V. Bui
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture Nha Trang University Nha Trang City Vietnam
| | - Minh‐Hoang Le
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture Nha Trang University Nha Trang City Vietnam
| | - Minh T. T. Vu
- Section for Aquatic Biology and Toxicology, Department of Biosciences University of Oslo Oslo Norway
| | - Khuong V. Dinh
- Cam Ranh Centre for Tropical Marine Research and Aquaculture, Institute of Aquaculture Nha Trang University Nha Trang City Vietnam
- Section for Aquatic Biology and Toxicology, Department of Biosciences University of Oslo Oslo Norway
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40
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Pirotta E, Thomas L, Costa DP, Hall AJ, Harris CM, Harwood J, Kraus SD, Miller PJO, Moore MJ, Photopoulou T, Rolland RM, Schwacke L, Simmons SE, Southall BL, Tyack PL. Understanding the combined effects of multiple stressors: A new perspective on a longstanding challenge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 821:153322. [PMID: 35074373 DOI: 10.1016/j.scitotenv.2022.153322] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 01/17/2022] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Wildlife populations and their habitats are exposed to an expanding diversity and intensity of stressors caused by human activities, within the broader context of natural processes and increasing pressure from climate change. Estimating how these multiple stressors affect individuals, populations, and ecosystems is thus of growing importance. However, their combined effects often cannot be predicted reliably from the individual effects of each stressor, and we lack the mechanistic understanding and analytical tools to predict their joint outcomes. We review the science of multiple stressors and present a conceptual framework that captures and reconciles the variety of existing approaches for assessing combined effects. Specifically, we show that all approaches lie along a spectrum, reflecting increasing assumptions about the mechanisms that regulate the action of single stressors and their combined effects. An emphasis on mechanisms improves analytical precision and predictive power but could introduce bias if the underlying assumptions are incorrect. A purely empirical approach has less risk of bias but requires adequate data on the effects of the full range of anticipated combinations of stressor types and magnitudes. We illustrate how this spectrum can be formalised into specific analytical methods, using an example of North Atlantic right whales feeding on limited prey resources while simultaneously being affected by entanglement in fishing gear. In practice, case-specific management needs and data availability will guide the exploration of the stressor combinations of interest and the selection of a suitable trade-off between precision and bias. We argue that the primary goal for adaptive management should be to identify the most practical and effective ways to remove or reduce specific combinations of stressors, bringing the risk of adverse impacts on populations and ecosystems below acceptable thresholds.
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Affiliation(s)
- Enrico Pirotta
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK; School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland.
| | - Len Thomas
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK.
| | - Daniel P Costa
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, USA; Institute of Marine Sciences, University of California, Santa Cruz, CA, USA.
| | - Ailsa J Hall
- Sea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, UK.
| | - Catriona M Harris
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK.
| | - John Harwood
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK.
| | - Scott D Kraus
- Anderson-Cabot Center for Ocean Life, New England Aquarium, Boston, MA, USA.
| | - Patrick J O Miller
- Sea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, UK.
| | - Michael J Moore
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA.
| | - Theoni Photopoulou
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK.
| | - Rosalind M Rolland
- Anderson-Cabot Center for Ocean Life, New England Aquarium, Boston, MA, USA.
| | - Lori Schwacke
- National Marine Mammal Foundation, Johns Island, SC, USA.
| | | | - Brandon L Southall
- Institute of Marine Sciences, University of California, Santa Cruz, CA, USA; Southall Environmental Associates, Inc., Aptos, CA, USA.
| | - Peter L Tyack
- Sea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, UK.
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41
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King OC, van de Merwe JP, Campbell MD, Smith RA, Warne MSJ, Brown CJ. Interactions among multiple stressors vary with exposure duration and biological response. Proc Biol Sci 2022; 289:20220348. [PMID: 35538782 PMCID: PMC9091850 DOI: 10.1098/rspb.2022.0348] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Coastal ecosystems are exposed to multiple anthropogenic stressors. Effective management actions would be better informed from generalized predictions of the individual, combined and interactive effects of multiple stressors; however, few generalities are shared across different meta-analyses. Using an experimental study, we present an approach for analysing regression-based designs with generalized additive models that allowed us to capture nonlinear effects of exposure duration and stressor intensity and access interactions among stressors. We tested the approach on a globally distributed marine diatom, using 72 h photosynthesis and growth assays to quantify the individual and combined effects of three common water quality stressors; photosystem II-inhibiting herbicide exposure, dissolved inorganic nitrogen (DIN) enrichment and reduced light (due to excess suspended sediment). Exposure to DIN and reduced light generally resulted in additivity, while exposure to diuron and reduced light resulted in additive, antagonistic or synergistic interactions, depending on the stressor intensity, exposure period and biological response. We thus find the context of experimental studies to be a primary driver of interactions. The experimental and modelling approaches used here bridge the gap between two-way designs and regression-based studies, which provides a way forward to identify generalities in multiple stressor interactions.
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Affiliation(s)
- Olivia C. King
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Jason P. van de Merwe
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Max D. Campbell
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
| | - Rachael A. Smith
- Office of the Great Barrier Reef, Department of Environment and Science, Queensland Government, Brisbane, Queensland 4000, Australia
| | - Michael St. J Warne
- School of Earth and Environmental Sciences, University of Queensland, Brisbane, Queensland 4067, Australia,Water Quality and Investigations, Queensland Department of Environment and Science, Brisbane, Queensland 4102, Australia,Centre for Agroecology, Water and Resilience, Coventry University, West Midlands, CV1 5FB, UK
| | - Christopher J. Brown
- Coastal and Marine Research Centre, Australian Rivers Institute, School of Environment and Science, Griffith University, Gold Coast, Queensland 4222, Australia
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42
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Turschwell MP, Connolly SR, Schäfer RB, De Laender F, Campbell MD, Mantyka-Pringle C, Jackson MC, Kattwinkel M, Sievers M, Ashauer R, Côté IM, Connolly RM, van den Brink PJ, Brown CJ. Interactive effects of multiple stressors vary with consumer interactions, stressor dynamics and magnitude. Ecol Lett 2022; 25:1483-1496. [PMID: 35478314 PMCID: PMC9320941 DOI: 10.1111/ele.14013] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 03/30/2022] [Accepted: 04/04/2022] [Indexed: 01/09/2023]
Abstract
Predicting the impacts of multiple stressors is important for informing ecosystem management but is impeded by a lack of a general framework for predicting whether stressors interact synergistically, additively or antagonistically. Here, we use process-based models to study how interactions generalise across three levels of biological organisation (physiological, population and consumer-resource) for a two-stressor experiment on a seagrass model system. We found that the same underlying processes could result in synergistic, additive or antagonistic interactions, with interaction type depending on initial conditions, experiment duration, stressor dynamics and consumer presence. Our results help explain why meta-analyses of multiple stressor experimental results have struggled to identify predictors of consistently non-additive interactions in the natural environment. Experiments run over extended temporal scales, with treatments across gradients of stressor magnitude, are needed to identify the processes that underpin how stressors interact and provide useful predictions to management.
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Affiliation(s)
- Mischa P Turschwell
- Coastal and Marine Research Centre, School of Environment and Science, Australian Rivers Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Sean R Connolly
- Naos Marine Laboratories, Smithsonian Tropical Research Institute, Balboa Ancón, Republic of Panama.,College of Science and Engineering, James Cook University, Townsville, Australia
| | - Ralf B Schäfer
- Quantitative Landscape Ecology, iES-Institute for Environmental Sciences, University Koblenz-Landau, Landau in der Pfalz, Germany
| | - Frederik De Laender
- Research Unit of Environmental and Evolutionary Biology, Namur Institute of Complex Systems and Institute of Life, Earth, and the Environment, University of Namur, Namur, Belgium
| | - Max D Campbell
- Coastal and Marine Research Centre, School of Environment and Science, Australian Rivers Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Chrystal Mantyka-Pringle
- Wildlife Conservation Society Canada, Whitehorse, Yukon Territory, Canada.,School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | | | - Mira Kattwinkel
- Quantitative Landscape Ecology, iES-Institute for Environmental Sciences, University Koblenz-Landau, Landau in der Pfalz, Germany
| | - Michael Sievers
- Coastal and Marine Research Centre, School of Environment and Science, Australian Rivers Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Roman Ashauer
- Environment Department, University of York, York, UK.,Syngenta Crop Protection AG, Basel, Switzerland
| | - Isabelle M Côté
- Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Rod M Connolly
- Coastal and Marine Research Centre, School of Environment and Science, Australian Rivers Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Paul J van den Brink
- Aquatic Ecology and Water Quality Management Group, Wageningen University, Wageningen, The Netherlands.,Wageningen Environmental Research, Wageningen, The Netherlands
| | - Christopher J Brown
- Coastal and Marine Research Centre, School of Environment and Science, Australian Rivers Institute, Griffith University, Gold Coast, Queensland, Australia
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43
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Streib L, Juvigny-Khenafou N, Heer H, Kattwinkel M, Schäfer RB. Spatiotemporal dynamics drive synergism of land use and climatic extreme events in insect meta-populations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:152602. [PMID: 34958839 DOI: 10.1016/j.scitotenv.2021.152602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 12/04/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
Ecosystems are increasingly threatened by co-occurring stressors associated with anthropogenic global change. Spatial stressor patterns range from local to regional to global, and temporal stressor patterns from discrete to continuous. To date, most multiple stressor studies covered short periods and focused on local effects and interactions. However, it remains largely unknown how stressors with different spatiotemporal patterns interact in their effects over longer periods. In particular, at higher spatial scales, biotic dynamics in ecological networks complicate the understanding of stressor interactions. We used a spatially explicit meta-population model for a generic freshwater insect, parameterized based on traits of the European damselfly Coenagrion mercuriale, to simulate scenarios of discrete climatic extreme events and continuous land use-related stress. Climatic extreme events were modeled as recurring mortality in all patches, whereas land use permanently influenced meta-populations via patch qualities and network connectivity. We found that the risk of discrete climatic extreme events to meta-populations depended strongly on the proportion of land use types, with effects ranging from negligible to extinction. Land use-related stress limited recovery in meta-populations from effects of climatic extreme events, resulting in synergistic stressor interactions. Moreover, the spatial configuration of land use type influenced the combined stressor effects with clustered configurations resulting in lower effects compared to a random configuration. Finally, we found that combined stressor effects can vary with the time point at which they were determined, indicating that inconclusive results in multiple stressor research can partly be due to differences in the time of determination. We conclude that conservation should focus on regional landscape management to mitigate risks on meta-populations from future, intensified extreme climate events. Reducing land use effects, thus improving patch quality and network connectivity, can compensate for effects of additional discrete stressors and, in turn, synergistic interactions.
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Affiliation(s)
- Lucas Streib
- iES - Institute for Environmental Sciences, University of Koblenz-Landau, 76829 Landau i. d. Pfalz, Germany.
| | - Noel Juvigny-Khenafou
- iES - Institute for Environmental Sciences, University of Koblenz-Landau, 76829 Landau i. d. Pfalz, Germany.
| | - Henriette Heer
- iES - Institute for Environmental Sciences, University of Koblenz-Landau, 76829 Landau i. d. Pfalz, Germany.
| | - Mira Kattwinkel
- iES - Institute for Environmental Sciences, University of Koblenz-Landau, 76829 Landau i. d. Pfalz, Germany.
| | - Ralf B Schäfer
- iES - Institute for Environmental Sciences, University of Koblenz-Landau, 76829 Landau i. d. Pfalz, Germany.
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44
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Orr JA, Luijckx P, Arnoldi JF, Jackson AL, Piggott JJ. Rapid evolution generates synergism between multiple stressors: Linking theory and an evolution experiment. GLOBAL CHANGE BIOLOGY 2022; 28:1740-1752. [PMID: 33829610 DOI: 10.1111/gcb.15633] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
Global change encompasses many co-occurring anthropogenic stressors. Understanding the interactions between these multiple stressors, whether they be additive, antagonistic or synergistic, is critical for ecosystem managers when prioritizing which stressors to mitigate in the face of global change. While such interactions between stressors appear prevalent, it remains unclear if and how these interactions change over time, as the majority of multiple-stressor studies rarely span multiple generations of study organisms. Although meta-analyses have reported some intriguing temporal trends in stressor interactions, for example that synergism may take time to emerge, the mechanistic basis for such observations is unknown. In this study, by analysing data from an evolution experiment with the rotifer Brachionus calyciflorus (~35 generations and 31,320 observations), we show that adaptation to multiple stressors shifts stressor interactions towards synergism. We show that trade-offs, where populations cannot optimally perform multiple tasks (i.e. adapting to multiple stressors), generate this bias towards synergism. We also show that removal of stressors from evolved populations does not necessarily increase fitness and that there is variation in the evolutionary trajectories of populations that experienced the same stressor regimes. Our results highlight outstanding questions at the interface between evolution and global change biology, and illustrate the importance of considering rapid adaptation when managing or restoring ecosystems subjected to multiple stressors under global change.
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Affiliation(s)
- James A Orr
- School of Natural Sciences, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Pepijn Luijckx
- School of Natural Sciences, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Jean-François Arnoldi
- School of Natural Sciences, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- Centre National de la Recherche Scientifique, Experimental and Theoretical Ecology Station, Moulis, France
| | - Andrew L Jackson
- School of Natural Sciences, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Jeremy J Piggott
- School of Natural Sciences, Trinity College Dublin, The University of Dublin, Dublin, Ireland
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45
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Kelly MG, Phillips G, Teixeira H, Várbíró G, Salas Herrero F, Willby NJ, Poikane S. Establishing ecologically-relevant nutrient thresholds: A tool-kit with guidance on its use. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150977. [PMID: 34656586 DOI: 10.1016/j.scitotenv.2021.150977] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/20/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
One key component of any eutrophication management strategy is establishment of realistic thresholds above which negative impacts become significant and provision of ecosystem services is threatened. This paper introduces a toolkit of statistical approaches with which such thresholds can be set, explaining their rationale and situations under which each is effective. All methods assume a causal relationship between nutrients and biota, but we also recognise that nutrients rarely act in isolation. Many of the simpler methods have limited applicability when other stressors are present. Where relationships between nutrients and biota are strong, regression is recommended. Regression relationships can be extended to include additional stressors or variables responsible for variation between water bodies. However, when the relationship between nutrients and biota is weaker, categorical approaches are recommended. Of these, binomial regression and an approach based on classification mismatch are most effective although both will underestimate threshold concentrations if a second stressor is present. Whilst approaches such as changepoint analysis are not particularly useful for meeting the specific needs of EU legislation, other multivariate approaches (e.g. decision trees) may have a role to play. When other stressors are present quantile regression allows thresholds to be established which set limits above which nutrients are likely to influence the biota, irrespective of other pressures. The statistical methods in the toolkit may be useful as part of a management strategy, but more sophisticated approaches, often generating thresholds appropriate to individual water bodies rather than to broadly defined "types", are likely to be necessary too. The importance of understanding underlying ecological processes as well as correct selection and application of methods is emphasised, along with the need to consider local regulatory and decision-making systems, and the ease with which outcomes can be communicated to non-technical audiences.
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Affiliation(s)
- Martyn G Kelly
- Bowburn Consultancy, 11 Monteigne Drive, Bowburn, Durham DH6 5QB, UK; School of Geography, Nottingham University, Nottingham NG7 2RD, UK.
| | - Geoff Phillips
- Biological and Environmental Sciences, University of Stirling, Stirling FK9 4LA, UK
| | - Heliana Teixeira
- Department of Biology & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Gábor Várbíró
- Department of Tisza Research, Institute of Aquatic Ecology, Centre for Ecological Research, Bem t'er 18/c, H-4026 Debrecen, Hungary
| | | | - Nigel J Willby
- Biological and Environmental Sciences, University of Stirling, Stirling FK9 4LA, UK
| | - Sandra Poikane
- European Commission Joint Research Centre (JRC), I-21027 Ispra, Italy
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46
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Hollarsmith JA, Therriault TW, Côté IM. Practical implementation of cumulative‐effects management of marine ecosystems in western North America. CONSERVATION BIOLOGY 2022; 36:e13841. [PMCID: PMC9305205 DOI: 10.1111/cobi.13841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 05/26/2023]
Abstract
Globally, ecosystem structure and function have been degraded by the cumulative effects (CE) of multiple stressors. To maintain ecosystem resilience, there is an urgent need to better account for CE in management decision‐making at various scales. Current laws and regulations are supported by a multitude of frameworks and strategies that vary in application and terminology use across management agencies and geopolitical boundaries. We synthesized management frameworks that accounted for CE in marine ecosystems at the regional and national levels across western North America (Canada, United States, Mexico) to identify similarities and shared challenges to successful implementation. We examined examples of solutions to the identified challenges (e.g., interagency and cross‐border partnerships to overcome challenges of managing for ecologically relevant spatial scales). Management frameworks in general consisted of 3 phases: scoping and structuring the system; characterizing relationships; and evaluating management options. Challenges in the robust implementation of these phases included lack of interagency coordination, minimal incorporation of diverse perspectives, and data deficiencies. Cases that provided solutions to these challenges encouraged coordination at ecological rather than jurisdictional scales, enhanced involvement of stakeholders and Indigenous groups, and used nontraditional data sources for decision‐making. Broader implementation of these approaches, combined with increased interagency and international coordination and collaboration, should facilitate the rapid advancement of more effective CE assessment and ecosystem management in North America and elsewhere.
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Affiliation(s)
- Jordan A. Hollarsmith
- Department of Biological SciencesSimon Fraser UniversityBurnabyBritish ColumbiaCanada
- Pacific Biological StationFisheries and Oceans CanadaNanaimoBritish ColumbiaCanada
| | - Thomas W. Therriault
- Pacific Biological StationFisheries and Oceans CanadaNanaimoBritish ColumbiaCanada
| | - Isabelle M. Côté
- Department of Biological SciencesSimon Fraser UniversityBurnabyBritish ColumbiaCanada
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47
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Polazzo F, Roth SK, Hermann M, Mangold‐Döring A, Rico A, Sobek A, Van den Brink PJ, Jackson M. Combined effects of heatwaves and micropollutants on freshwater ecosystems: Towards an integrated assessment of extreme events in multiple stressors research. GLOBAL CHANGE BIOLOGY 2022; 28:1248-1267. [PMID: 34735747 PMCID: PMC9298819 DOI: 10.1111/gcb.15971] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 10/14/2021] [Accepted: 10/29/2021] [Indexed: 05/11/2023]
Abstract
Freshwater ecosystems are strongly influenced by weather extremes such as heatwaves (HWs), which are predicted to increase in frequency and magnitude in the future. In addition to these climate extremes, the freshwater realm is impacted by the exposure to various classes of chemicals emitted by anthropogenic activities. Currently, there is limited knowledge on how the combined exposure to HWs and chemicals affects the structure and functioning of freshwater ecosystems. Here, we review the available literature describing the single and combined effects of HWs and chemicals on different levels of biological organization, to obtain a holistic view of their potential interactive effects. We only found a few studies (13 out of the 61 studies included in this review) that investigated the biological effects of HWs in combination with chemical pollution. The reported interactive effects of HWs and chemicals varied largely not only within the different trophic levels but also depending on the studied endpoints for populations or individuals. Hence, owing also to the little number of studies available, no consistent interactive effects could be highlighted at any level of biological organization. Moreover, we found an imbalance towards single species and population experiments, with only five studies using a multitrophic approach. This results in a knowledge gap for relevant community and ecosystem level endpoints, which prevents the exploration of important indirect effects that can compromise food web stability. Moreover, this knowledge gap impairs the validity of chemical risk assessments and our ability to protect ecosystems. Finally, we highlight the urgency of integrating extreme events into multiple stressors studies and provide specific recommendations to guide further experimental research in this regard.
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Affiliation(s)
- Francesco Polazzo
- IMDEA Water Institute, Science and Technology Campus of the University of AlcaláAlcalá de HenaresSpain
| | - Sabrina K. Roth
- Department of Environmental ScienceStockholm UniversityStockholmSweden
| | - Markus Hermann
- Aquatic Ecology and Water Quality Management GroupWageningen UniversityWageningenThe Netherlands
| | - Annika Mangold‐Döring
- Aquatic Ecology and Water Quality Management GroupWageningen UniversityWageningenThe Netherlands
| | - Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of AlcaláAlcalá de HenaresSpain
- Cavanilles Institute of Biodiversity and Evolutionary BiologyUniversity of ValenciaValenciaSpain
| | - Anna Sobek
- Department of Environmental ScienceStockholm UniversityStockholmSweden
| | - Paul J. Van den Brink
- Aquatic Ecology and Water Quality Management GroupWageningen UniversityWageningenThe Netherlands
- Wageningen Environmental ResearchWageningenThe Netherlands
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48
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Meng S, Delnat V, Stoks R. Multigenerational effects modify the tolerance of mosquito larvae to chlorpyrifos but not to a heat spike and do not change their synergism. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118333. [PMID: 34637829 DOI: 10.1016/j.envpol.2021.118333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 10/03/2021] [Accepted: 10/07/2021] [Indexed: 06/13/2023]
Abstract
While interactions with global warming and multigenerational effects are considered crucial to improve risk assessment of pesticides, these have rarely been studied in an integrated way. While heat extremes can magnify pesticide toxicity, no studies tested how their combined effects may transmit to the next generation. We exposed mosquito larvae in a full factorial, two-generation experiment to a heat spike followed by chlorpyrifos exposure. As expected, the heat spike magnified the chlorpyrifos-induced lethal and sublethal effects within both generations. Only when preceded by the heat spike, chlorpyrifos increased mortality and reduced the population growth rate. Moreover, chlorpyrifos-induced reductions in heat tolerance (CTmax), acetylcholinesterase (AChE) activity and development time were further magnified by the heat spike. Notably, when parents were exposed to chlorpyrifos, the chlorpyrifos-induced lethal and sublethal effects in the offspring were smaller, indicating increased tolerance to chlorpyrifos. In contrast, there was no such multigenerational effect for the heat spike. Despite the adaptive multigenerational effect to the pesticide, the synergism with the heat spike was still present in the offspring generation. Generally, our results provide important evidence that short exposure to pulse-like global change stressors can strongly affect organisms within and across generations, and highlight the importance of considering multigenerational effects in risk assessment.
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Affiliation(s)
- Shandong Meng
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Belgium.
| | - Vienna Delnat
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Belgium
| | - Robby Stoks
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Belgium
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49
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Bruijning M, Fossen EIF, Jongejans E, Vanvelk H, Raeymaekers JAM, Govaert L, Brans KI, Einum S, De Meester L. Host–parasite dynamics shaped by temperature and genotype: Quantifying the role of underlying vital rates. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13966] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marjolein Bruijning
- Department of Ecology and Evolutionary Biology Princeton University Princeton NJ USA
- Department of Animal Ecology and Physiology Radboud University Nijmegen The Netherlands
| | - Erlend I. F. Fossen
- Centre for Biodiversity Dynamics Department of Biology NTNUNorwegian University of Science and Technology Trondheim Norway
- Animal Ecology Department of Ecology and Genetics Uppsala University Uppsala Sweden
| | - Eelke Jongejans
- Department of Animal Ecology and Physiology Radboud University Nijmegen The Netherlands
- Animal Ecology NIOO‐KNAW Wageningen The Netherlands
| | - Héléne Vanvelk
- Laboratory of Aquatic Ecology, Evolution and Conservation KU Leuven Leuven Belgium
| | | | - Lynn Govaert
- Laboratory of Aquatic Ecology, Evolution and Conservation KU Leuven Leuven Belgium
- Department of Evolutionary Biology and Environmental Studies University of Zurich Zürich Switzerland
- Department of Aquatic Ecology Eawag Swiss Federal Institute of Aquatic Science and Technology Dübendorf Switzerland
| | - Kristien I. Brans
- Laboratory of Aquatic Ecology, Evolution and Conservation KU Leuven Leuven Belgium
| | - Sigurd Einum
- Centre for Biodiversity Dynamics Department of Biology NTNUNorwegian University of Science and Technology Trondheim Norway
| | - Luc De Meester
- Laboratory of Aquatic Ecology, Evolution and Conservation KU Leuven Leuven Belgium
- Leibniz Institüt für Gewasserökologie und Binnenfischerei (IGB) Berlin Germany
- Institute of Biology Freie Universität Berlin Berlin Germany
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50
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Macaulay SJ, Hageman KJ, Piggott JJ, Juvigny-Khenafou NPD, Matthaei CD. Warming and imidacloprid pulses determine macroinvertebrate community dynamics in experimental streams. GLOBAL CHANGE BIOLOGY 2021; 27:5469-5490. [PMID: 34418243 DOI: 10.1111/gcb.15856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 06/16/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
Sustainable management of freshwater and pesticide use is essential for mitigating the impacts of intensive agriculture in the context of a changing climate. To better understand how climate change will affect the vulnerability of freshwater ecosystems to chemical pollutants, more empirical evidence is needed on the combined effects of climatic and chemical stressors in environmentally realistic conditions. Our experiment provides the first empirical evaluation of stream macroinvertebrate community dynamics in response to one of the world's most widely used insecticides, imidacloprid, and increased water temperature. In a 7-week streamside experiment using 128 flow-through circular mesocosms, we investigated the effects of pulsed imidacloprid exposure (four environmentally relevant levels between 0 and 4.6 µg/L) and raised water temperature (ambient, 3°C above) on invertebrate communities representative of fast- and slow-flowing microhabitats. Invertebrate drift and insect emergence were monitored during three pesticide pulses (10 days apart), and benthic invertebrate communities were sampled after 24 days of heating and pesticide manipulations. All three manipulated factors strongly affected drift community composition. The first imidacloprid pulse and increased temperature had a greater impact on communities in fast-flowing mesocosms, which contained more pollution-sensitive EPT taxa (mayflies, stoneflies and caddisflies). Heating and imidacloprid caused increased emigration by drift, weak reductions in emergence, and negatively affected the benthic community. The combined effect of stressor manipulations and a 10-day natural heatwave drastically reduced relative abundances of EPT and insects overall and caused a shift to oligochaete-, crustacean- and gastropod-dominated communities. Contrary to our hypothesis, the very high yet realistic water temperatures reached in our experiment meant the negative effects of imidacloprid were clearest at ambient temperatures and fast flow. These findings demonstrate the potential combined impacts of imidacloprid contamination and heatwaves on freshwater invertebrate communities under future climate scenarios and highlight the need for more countries to take regulatory action to control neonicotinoid use.
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Affiliation(s)
- Samuel J Macaulay
- Department of Zoology, University of Otago, Dunedin, Otago, New Zealand
| | - Kimberly J Hageman
- Department of Chemistry and Biochemistry, Utah State University, Logan, USA
| | - Jeremy J Piggott
- Department of Zoology, Trinity College Dublin, The University of Dublin, Dublin, Ireland
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