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Juvigny-Khenafou NPD, Burgazzi G, Steiner N, Harvey E, Terui A, Piggott J, Manfrin A, Feckler A, Leese F, Schäfer RB. Effects of flow reduction and artificial light at night (ALAN) on litter decomposition and invertebrate communities in streams: A flume experiment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168836. [PMID: 38016568 DOI: 10.1016/j.scitotenv.2023.168836] [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: 08/03/2023] [Revised: 11/19/2023] [Accepted: 11/22/2023] [Indexed: 11/30/2023]
Abstract
River ecosystems are heavily impacted by multiple stressors, where effects can cascade downstream of point sources. However, a spatial approach to assess the effects of multiple stressors is missing. We assessed the local and downstream effects on litter decomposition, and associated invertebrate communities of two stressors: flow reduction and artificial light at night (ALAN). We used an 18-flow-through mesocosm system consisting of two tributaries, where we applied the stressors, merging in a downstream section. We assessed the changes in decomposition rate and invertebrate community structure in leaf bags. We found no effect of ALAN or its interaction with flow reduction on the litter decomposition or the invertebrate community in the tributaries. Flow reduction alone led to a 14.8 % reduction in decomposition rate in the tributaries. We recorded no effect of flow reduction on the macroinvertebrates community composition in the litter bags. We also observed no effects of the spatial arrangement of the stressors on the litter decomposition and macroinvertebrate community structure downstream. Overall, our results suggest the impact of stressors on litter decomposition and macroinvertebrate communities remained local in our experiment. Our work thus calls for further studies to identify the mechanisms and the conditions under which spatial effects dominate over local processes.
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Affiliation(s)
- Noël P D Juvigny-Khenafou
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany.
| | - Gemma Burgazzi
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Nikita Steiner
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Eric Harvey
- Centre de Recherche sur les Interactions Bassins-Versants, Écosystèmes Aquatiques (RIVE) Université du Québec à Trois-Rivières, Canada
| | - Akira Terui
- Department of Biology, University of North Carolina at Greensboro, Greensboro, USA
| | - Jeremy Piggott
- Trinity Centre for the Environment & Discipline of Zoology, School of Natural Sciences, Trinity College Dublin, The University of Dublin, College Green, Dublin 2, Ireland
| | - Alessandro Manfrin
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Alexander Feckler
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany; Eußerthal Ecosystem Research Station, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
| | - Florian Leese
- Aquatic Ecosystem Research, University of Duisburg-Essen, Essen, Germany
| | - Ralf B Schäfer
- iES, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau in der Pfalz, Germany
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2
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McKenzie M, Brooks A, Callisto M, Collins AL, Durkota JM, Death RG, Jones JI, Linares MS, Matthaei CD, Monk WA, Murphy JF, Wagenhoff A, Wilkes M, Wood PJ, Mathers KL. Freshwater invertebrate responses to fine sediment stress: A multi-continent perspective. GLOBAL CHANGE BIOLOGY 2024; 30:e17084. [PMID: 38273567 PMCID: PMC10952627 DOI: 10.1111/gcb.17084] [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: 06/16/2023] [Revised: 10/20/2023] [Accepted: 11/10/2023] [Indexed: 01/27/2024]
Abstract
Excessive fine sediment (particles <2 mm) deposition in freshwater systems is a pervasive stressor worldwide. However, understanding of ecological response to excess fine sediment in river systems at the global scale is limited. Here, we aim to address whether there is a consistent response to increasing levels of deposited fine sediment by freshwater invertebrates across multiple geographic regions (Australia, Brazil, New Zealand and the UK). Results indicate ecological responses are not globally consistent and are instead dependent on both the region and the facet of invertebrate diversity considered, that is, taxonomic or functional trait structure. Invertebrate communities of Australia were most sensitive to deposited fine sediment, with the greatest rate of change in communities occurring when fine sediment cover was low (below 25% of the reach). Communities in the UK displayed a greater tolerance with most compositional change occurring between 30% and 60% cover. In both New Zealand and Brazil, which included the most heavily sedimented sampled streams, the communities were more tolerant or demonstrated ambiguous responses, likely due to historic environmental filtering of invertebrate communities. We conclude that ecological responses to fine sediment are not generalisable globally and are dependent on landscape filters with regional context and historic land management playing important roles.
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Affiliation(s)
| | - Andrew Brooks
- Department of Planning and Environment, Surface Water ScienceNSW GovernmentWollongongNew South WalesAustralia
| | - Marcos Callisto
- Laboratory of Ecology of Benthos, Department of Genetics, Ecology and EvolutionInstitute of Biological Sciences, Federal University of Minas GeraisBelo HorizonteBrazil
| | - Adrian L. Collins
- Net Zero and Resilient Farming, Rothamsted ResearchOkehamptonDevonUK
| | | | - Russell G. Death
- Innovative River Solutions, School of Agriculture and EnvironmentMassey UniversityPalmerston NorthNew Zealand
| | - J. Iwan Jones
- School of Biological and Behavioural SciencesQueen Mary University of LondonLondonUK
| | - Marden S. Linares
- Laboratory of Ecology of Benthos, Department of Genetics, Ecology and EvolutionInstitute of Biological Sciences, Federal University of Minas GeraisBelo HorizonteBrazil
| | | | - Wendy A. Monk
- Faculty of Forestry and Environmental ManagementEnvironment and Climate Change Canada, Canadian Rivers Institute, University of New BrunswickFrederictonNew BrunswickCanada
| | - John F. Murphy
- School of Biological and Behavioural SciencesQueen Mary University of LondonLondonUK
| | | | - Martin Wilkes
- School of Life SciencesUniversity of EssexColchesterUK
| | - Paul J. Wood
- Geography and EnvironmentLoughborough UniversityLoughboroughUK
| | - Kate L. Mathers
- Geography and EnvironmentLoughborough UniversityLoughboroughUK
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3
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Wang L, Liu H, Carvalho F, Chen Y, Lai L, Ge J, Tian X, Luo Y. Top-Down Effect of Arthropod Predator Chinese Mitten Crab on Freshwater Nutrient Cycling. Animals (Basel) 2023; 13:2342. [PMID: 37508124 PMCID: PMC10376719 DOI: 10.3390/ani13142342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
Aquatic litter decomposition is highly dependent on contributions and interactions at different trophic levels. The invasion of alien aquatic organisms like the channeled apple snail (Pomacea canaliculata) might lead to changes in the decomposition process through new species interactions in the invaded wetland. However, it is not clear how aquatic macroinvertebrate predators like the Chinese mitten crab (Eriocheir sinensis) will affect the nutrient cycle in freshwater ecosystems in the face of new benthic invasion. We used the litter bag method to explore the top-down effect of crabs on the freshwater nutrient cycle with the help of soil zymography (a technology previously used in terrestrial ecosystems). The results showed significant feeding effects of crabs and snails on lotus leaf litter and cotton strips. Crabs significantly inhibited the intake of lotus litter and cotton strips and the ability to transform the environment of snails by predation. Crabs promoted the decomposition of various litter substrates by affecting the microbial community structure in the sediment. These results suggest that arthropod predators increase the complexity of detrital food webs through direct and indirect interactions, and consequently have an important impact on the material cycle and stability of freshwater ecosystems. This top-down effect makes macrobenthos play a key role in the biological control and engineering construction of freshwater ecosystems.
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Affiliation(s)
- Lin Wang
- School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Hongjun Liu
- School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Francisco Carvalho
- CBMA-Center of Molecular and Environmental Biology, Biology Department, University of Minho, 4710-057 Braga, Portugal
| | - Yunru Chen
- School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
- Beijing Municipal Ecological and Environmental Monitoring Center, 14 Chegongzhuangxi Road, Beijing 100048, China
| | - Linshiyu Lai
- School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Jiachun Ge
- School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
- Freshwater Fishery Institute of Jiangsu Province, Nanjing 210017, China
| | - Xingjun Tian
- School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Yunchao Luo
- School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
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4
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Burdon FJ, Reyes M, Schönenberger U, Räsänen K, Tiegs SD, Eggen RIL, Stamm C. Environmental context determines pollution impacts on ecosystem functioning. OIKOS 2022. [DOI: 10.1111/oik.09131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Francis J. Burdon
- Eawag – Swiss Federal Inst. of Aquatic Science and Technology Dübendorf Switzerland
- Te Aka Mātuatua – School of Science, Univ. of Waikato Hamilton New Zealand
| | - Marta Reyes
- Eawag – Swiss Federal Inst. of Aquatic Science and Technology Dübendorf Switzerland
| | - Urs Schönenberger
- Eawag – Swiss Federal Inst. of Aquatic Science and Technology Dübendorf Switzerland
| | - Katja Räsänen
- Eawag – Swiss Federal Inst. of Aquatic Science and Technology Dübendorf Switzerland
- Dept of Biological and Environmental Science, Univ. of Jyväskylä Jyväskylä Finland
| | - Scott D. Tiegs
- Dept of Biological Sciences, Oakland Univ. Rochester MI USA
| | - Rik I. L. Eggen
- Eawag – Swiss Federal Inst. of Aquatic Science and Technology Dübendorf Switzerland
- ETH Zürich, Inst. of Biogeochemistry and Pollutant Dynamics Zürich Switzerland
| | - Christian Stamm
- Eawag – Swiss Federal Inst. of Aquatic Science and Technology Dübendorf Switzerland
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5
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Harrison LJ, Pearson KA, Wheatley CJ, Hill JK, Maltby L, Rivetti C, Speirs L, White PCL. Functional measures as potential indicators of down-the-drain chemical stress in freshwater ecological risk assessment. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2022; 18:1135-1147. [PMID: 34951104 PMCID: PMC9543243 DOI: 10.1002/ieam.4568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Conventional ecological risk assessment (ERA) predominately evaluates the impact of individual chemical stressors on a limited range of taxa, which are assumed to act as proxies to predict impacts on freshwater ecosystem function. However, it is recognized that this approach has limited ecological relevance. We reviewed the published literature to identify measures that are potential functional indicators of down-the-drain chemical stress, as an approach to building more ecological relevance into ERA. We found wide variation in the use of the term "ecosystem function," and concluded it is important to distinguish between measures of processes and measures of the capacity for processes (i.e., species' functional traits). Here, we present a classification of potential functional indicators and suggest that including indicators more directly connected with processes will improve the detection of impacts on ecosystem functioning. The rate of leaf litter breakdown, oxygen production, carbon dioxide consumption, and biomass production have great potential to be used as functional indicators. However, the limited supporting evidence means that further study is needed before these measures can be fully implemented and interpreted within an ERA and regulatory context. Sensitivity to chemical stress is likely to vary among functional indicators depending on the stressor and ecosystem context. Therefore, we recommend that ERA incorporates a variety of indicators relevant to each aspect of the function of interest, such as a direct measure of a process (e.g., rate of leaf litter breakdown) and a capacity for a process (e.g., functional composition of macroinvertebrates), alongside structural indicators (e.g., taxonomic diversity of macroinvertebrates). Overall, we believe that the consideration of functional indicators can add value to ERA by providing greater ecological relevance, particularly in relation to indirect effects, functional compensation (Box 1), interactions of multiple stressors, and the importance of ecosystem context. Environ Assess Manag 2022;18:1135-1147. © 2022 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
- Laura J. Harrison
- Department of Environment and GeographyUniversity of YorkYorkHeslingtonUK
| | - Katie A. Pearson
- Department of Environment and GeographyUniversity of YorkYorkHeslingtonUK
| | - Christopher J. Wheatley
- Department of BiologyLeverhulme Centre for Anthropocene Biodiversity, University of YorkYorkHeslingtonUK
| | - Jane K. Hill
- Department of BiologyLeverhulme Centre for Anthropocene Biodiversity, University of YorkYorkHeslingtonUK
| | - Lorraine Maltby
- School of Biosciences, The University of SheffieldSheffieldWestern BankUK
| | - Claudia Rivetti
- Safety and Environmental Assurance Centre, Unilever, Colworth Science ParkSharnbrookUK
| | - Lucy Speirs
- Safety and Environmental Assurance Centre, Unilever, Colworth Science ParkSharnbrookUK
| | - Piran C. L. White
- Department of Environment and GeographyUniversity of YorkYorkHeslingtonUK
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6
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Gentilin-Avanci C, Pinha GD, Ratz Scoarize MM, Petsch DK, Benedito E. Warming water and leaf litter quality but not plant origin drive decomposition and fungal diversity in an experiment. Fungal Biol 2022; 126:631-639. [DOI: 10.1016/j.funbio.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 07/12/2022] [Accepted: 08/08/2022] [Indexed: 11/26/2022]
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7
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Mancuso J, Messick E, Tiegs SD. Parsing spatial and temporal variation in stream ecosystem functioning. Ecosphere 2022. [DOI: 10.1002/ecs2.4202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Jasmine Mancuso
- Department of Biological Sciences Oakland University Rochester Michigan USA
| | - Emily Messick
- Department of Biological Sciences Oakland University Rochester Michigan USA
| | - Scott D. Tiegs
- Department of Biological Sciences Oakland University Rochester Michigan USA
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8
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Yue K, De Frenne P, Van Meerbeek K, Ferreira V, Fornara DA, Wu Q, Ni X, Peng Y, Wang D, Heděnec P, Yang Y, Wu F, Peñuelas J. Litter quality and stream physicochemical properties drive global invertebrate effects on instream litter decomposition. Biol Rev Camb Philos Soc 2022; 97:2023-2038. [PMID: 35811333 DOI: 10.1111/brv.12880] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 06/01/2022] [Accepted: 06/06/2022] [Indexed: 11/28/2022]
Abstract
Plant litter is the major source of energy and nutrients in stream ecosystems and its decomposition is vital for ecosystem nutrient cycling and functioning. Invertebrates are key contributors to instream litter decomposition, yet quantification of their effects and drivers at the global scale remains lacking. Here, we systematically synthesized data comprising 2707 observations from 141 studies of stream litter decomposition to assess the contribution and drivers of invertebrates to the decomposition process across the globe. We found that (1) the presence of invertebrates enhanced instream litter decomposition globally by an average of 74%; (2) initial litter quality and stream water physicochemical properties were equal drivers of invertebrate effects on litter decomposition, while invertebrate effects on litter decomposition were not affected by climatic region, mesh size of coarse-mesh bags or mycorrhizal association of plants providing leaf litter; and (3) the contribution of invertebrates to litter decomposition was greatest during the early stages of litter mass loss (0-20%). Our results, besides quantitatively synthesizing the global pattern of invertebrate contribution to instream litter decomposition, highlight the most significant effects of invertebrates on litter decomposition at early rather than middle or late decomposition stages, providing support for the inclusion of invertebrates in global dynamic models of litter decomposition in streams to explore mechanisms and impacts of terrestrial, aquatic, and atmospheric carbon fluxes.
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Affiliation(s)
- Kai Yue
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China.,Forest & Nature Lab, Ghent University, Geraardsbergsesteenweg 267, 9090, Gontrode, Belgium
| | - Pieter De Frenne
- Forest & Nature Lab, Ghent University, Geraardsbergsesteenweg 267, 9090, Gontrode, Belgium
| | - Koenraad Van Meerbeek
- Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, 3001, Leuven, Belgium
| | - Verónica Ferreira
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, 3000-456, Coimbra, Portugal
| | - Dario A Fornara
- Davines Group-Rodale Institute European Regenerative Organic Center (EROC), Via Don Angelo Calzolari 55/a, 43126, Parma, Italy
| | - Qiqian Wu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an, 311300, China
| | - Xiangyin Ni
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Yan Peng
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China.,Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg, 1958, Denmark
| | - Dingyi Wang
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Petr Heděnec
- Institute of Tropical Biodiversity and Sustainable Development, University Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.,Agritec Plant Research Ltd., Zemědělská 16, Šumperk, 78701, Czech Republic
| | - Yusheng Yang
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Fuzhong Wu
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China
| | - Josep Peñuelas
- CREAF, E08193, Cerdanyola del Vallès, Catalonia, Spain.,CSIC, Global Ecology Unit, CREAF-CSIC-UAB, E08193, Cerdanyola del Vallès, Catalonia, Spain
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9
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Jabiol J, Chauvet E, Guérold F, Bouquerel J, Usseglio-Polatera P, Artigas J, Margoum C, Le Dréau M, Moreira A, Mazzella N, Gouy V. The combination of chemical, structural, and functional indicators to evaluate the anthropogenic impacts on agricultural stream ecosystems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:29296-29313. [PMID: 34647214 DOI: 10.1007/s11356-021-16925-5] [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: 04/12/2021] [Accepted: 10/03/2021] [Indexed: 06/13/2023]
Abstract
Freshwater contamination by pesticides in agricultural landscapes is of increasing concern worldwide, with strong pesticide impacts on biodiversity, ecosystem functions, and ultimately human health (drinking water, fishing). In addition, the excessively large number of substances, as well as their low - and temporally variable - concentrations in water, make the chemical monitoring by grab sampling very demanding and not fully representative of the actual contamination. Tools that integrate temporal variations and that are ecologically relevant are clearly needed to improve the monitoring of freshwater contamination and assess its biological effects. Here, we studied pesticide contamination and its biological impacts in 10 stream sections (sites) belonging to 3 agricultural catchments in France. In each site, we deployed a combination of pesticide integrative samplers, biocenotic indicators based on benthic macroinvertebrates, and functional indicators based on leaf litter decomposition and associated fungal communities. The 3 approaches largely proved complementary: structural and functional indicators did not respond equally to different agricultural impacts such as pesticide contamination (as revealed by integrative samplers), nutrients, or oxygen depletion. Combining chemical, structural, and functional indicators thus seems an excellent strategy to provide a comprehensive picture of agricultural impacts on stream ecosystems.
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Affiliation(s)
- Jérémy Jabiol
- HYFE (Hydrobiologie Et Fonctionnement Des Ecosystèmes), Elven, France.
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, INPT, Toulouse, France.
- LIEC (Laboratoire Interdisciplinaire Des Environnements Continentaux), Université de Lorraine, CNRS, Metz, France.
- Laboratoire Microorganismes : Génome Et Environnement (LMGE), Université Clermont Auvergne, CNRS, Clermont-Ferrand, France.
| | - Eric Chauvet
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, INPT, Toulouse, France
| | - François Guérold
- LIEC (Laboratoire Interdisciplinaire Des Environnements Continentaux), Université de Lorraine, CNRS, Metz, France
| | - Jonathan Bouquerel
- LIEC (Laboratoire Interdisciplinaire Des Environnements Continentaux), Université de Lorraine, CNRS, Metz, France
| | - Philippe Usseglio-Polatera
- LIEC (Laboratoire Interdisciplinaire Des Environnements Continentaux), Université de Lorraine, CNRS, Metz, France
| | - Joan Artigas
- Laboratoire Microorganismes : Génome Et Environnement (LMGE), Université Clermont Auvergne, CNRS, Clermont-Ferrand, France
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10
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Arias Font R, Khamis K, Milner AM, Sambrook Smith GH, Ledger ME. Low flow and heatwaves alter ecosystem functioning in a stream mesocosm experiment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 777:146067. [PMID: 33677285 DOI: 10.1016/j.scitotenv.2021.146067] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 02/16/2021] [Accepted: 02/20/2021] [Indexed: 05/12/2023]
Abstract
Climate change is expected to intensify the effect of environmental stressors on riverine ecosystems. Extreme events, such as low flow and heatwaves, could have profound consequences for stream ecosystem functioning, but research on the impact of these stressors and their interaction across multiple processes, remains scarce. Here, we report the results of a two-month stream mesocosm experiment testing the effect of low flow (66% water level reduction, without gravel exposure) and heatwaves (three 8-d episodes of +5 °C above ambient with 10-15 days recovery between each episode) on a suite of ecosystem processes (i.e. detrital decomposition, biofilm accrual, ecosystem metabolism and DOC quantity and quality). Low flow reduced whole system metabolism, suppressing the rates of gross primary production (GPP) and ecosystem respiration (ER), but elevated DOC concentration. Overall, habitat contraction was the main driver of reduced ecosystem functioning in the low flow treatment. By contrast, heatwaves increased decomposition, algal accrual, and humic-like DOC, but reduced leaf decomposition efficiency. Net ecosystem production (NEP) generally decreased across the experiment but was most pronounced for low flow and heatwaves when occurring independently. Assessment of NEP responses to the three successive heatwave events revealed that responses later in the sequence were more reduced (i.e. more similar to controls), suggesting biofilm communities may acclimate to autumn heatwaves. However, when heatwaves co-occurred with low flow, a strong reduction in both ER and GPP was observed, suggesting increased microbial mortality and reduced acclimation. Our study reveals autumn heatwaves potentially elongate the growth season for primary producers and stimulate decomposers. With climate change, river ecosystems may become more heterotrophic, with faster processing of recalcitrant carbon. Further research is required to identify the impacts on higher trophic levels, meta-community dynamics and the potential for legacy effects generated by successive low flows and heatwaves.
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Affiliation(s)
- Raquel Arias Font
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
| | - Kieran Khamis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Alexander M Milner
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Gregory H Sambrook Smith
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Mark E Ledger
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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11
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Erdozain M, Kidd KA, Emilson EJS, Capell SS, Luu T, Kreutzweiser DP, Gray MA. Forest management impacts on stream integrity at varying intensities and spatial scales: Do biological effects accumulate spatially? THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 763:144043. [PMID: 33383512 DOI: 10.1016/j.scitotenv.2020.144043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/19/2020] [Accepted: 11/19/2020] [Indexed: 06/12/2023]
Abstract
The effects of forest harvesting on headwaters are quite well understood, yet our understanding of whether impacts accumulate or dissipate downstream is limited. To address this, we investigated whether several biotic indicators changed from smaller to larger downstream sites (n = 6) within three basins that had intensive, extensive or minimal forest management in New Brunswick (Canada). Biofilm biomass and grazer abundance significantly increased from upstream to downstream, whereas organic matter decomposition and the autotrophic index of biofilms decreased. However, some spatial trends differed among basins and indicated either cumulative (macroinvertebrate abundance, predator density, sculpin GSI) or dissipative (autotrophic index, cotton decomposition) effects downstream, potentially explained by sediment and nutrient dynamics related to harvesting. No such among-basin differences were observed for leaf decomposition, biofilm biomass, macroinvertebrate richness or sculpin condition. Additionally, results suggest that some of the same biological impacts of forestry observed in small headwaters also occurred in larger systems. Although the intensive and extensive basins had lower macroinvertebrate diversity, there were no other signs of biological impairment, suggesting that, overall, current best management practices protect biological integrity downstream despite abiotic effects.
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Affiliation(s)
- Maitane Erdozain
- Canadian Rivers Institute and Biology Department, University of New Brunswick, 100 Tucker Park Road, Saint John, New Brunswick E2L 4L5, Canada.
| | - Karen A Kidd
- Canadian Rivers Institute and Biology Department, University of New Brunswick, 100 Tucker Park Road, Saint John, New Brunswick E2L 4L5, Canada; Department of Biology and School of Earth, Environment and Society, McMaster University, 1280 Main St. W., Hamilton, Ontario L8S 4K1, Canada
| | - Erik J S Emilson
- Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen St. East, Sault Ste. Marie, Ontario P6A 2E5, Canada
| | - Scott S Capell
- Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen St. East, Sault Ste. Marie, Ontario P6A 2E5, Canada
| | - Taylor Luu
- Department of Biology and School of Earth, Environment and Society, McMaster University, 1280 Main St. W., Hamilton, Ontario L8S 4K1, Canada
| | - David P Kreutzweiser
- Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen St. East, Sault Ste. Marie, Ontario P6A 2E5, Canada
| | - Michelle A Gray
- Canadian Rivers Institute and Faculty of Forestry and Environmental Management, University of New Brunswick, 28 Dineen Drive, Fredericton, New Brunswick E3B 5A3, Canada
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12
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Ferreira V, Figueiredo A, Graça MAS, Marchante E, Pereira A. Invasion of temperate deciduous broadleaf forests by N-fixing tree species - consequences for stream ecosystems. Biol Rev Camb Philos Soc 2021; 96:877-902. [PMID: 33426804 DOI: 10.1111/brv.12682] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 01/27/2023]
Abstract
Biological invasions are a major threat to biodiversity and ecosystem functioning. Forest invasion by alien woody species can have cross-ecosystem effects. This is especially relevant in the case of stream-riparian forest meta-ecosystems as forest streams depend strongly on riparian vegetation for carbon, nutrients and energy. Forest invasion by woody species with dissimilar characteristics from native species may be particularly troublesome. The invasion of temperate deciduous broadleaf forests with low representation of nitrogen (N)-fixing species by N-fixers has the potential to induce ecosystem changes at the stream level. Although effects of tree invasion on stream ecosystems have been under assessed, knowledge of native and invasive tree characteristics allows prediction of invasion effects on streams. Here we present a conceptual model to predict the effects of forest invasion by alien N-fixing species on streams, using as a background the invasion of temperate deciduous broadleaf forests by leguminous Acacia species, which are among the most aggressive invaders worldwide. Effects are discussed using a trait-based approach to allow the model to be applied to other pairs of invaded ecosystem-invasive species, taking into account differences in species traits and environmental conditions. Anticipated effects of N-fixing species invasions include changes in water quality (increase in N concentration) and quantity (decrease in flow) and changes in litter input characteristics (altered diversity, seasonality, typology, quantity and quality). The magnitude of these changes will depend on the magnitude of differences in species traits, the extent and duration of the invasion and stream characteristics (e.g. basal nutrient concentration). The extensive literature on effects of nutrient enrichment of stream water, water scarcity and changes in litter input characteristics on aquatic communities and processes allows prediction of invasion effects on stream structure and function. The magnitude of invasion effects on aquatic communities and processes may, however, depend on interactions among different pathways (e.g. effects mediated by increases in stream nutrient concentration may contrast with those mediated by decreases in water availability or by decreases in litter nutritional quality). A review of the literature addressing effects of increasing cover of N-fixing species on streams suggests a wide application of the model, while it highlights the need to consider differences in the type of system and species when making generalizations. Changes induced by N-fixing species invasion on streams can jeopardize multiple ecosystem services (e.g. good quality water, hydroelectricity, leisure activities), with relevant social and economic consequences.
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Affiliation(s)
- Verónica Ferreira
- Department of Life Sciences, MARE - Marine and Environmental Sciences Centre, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Albano Figueiredo
- Department of Geography and Tourism, CEGOT - Centre for Studies in Geography and Spatial Planning, University of Coimbra, Largo da Porta Férrea, 3004-530, Coimbra, Portugal
| | - Manuel A S Graça
- Department of Life Sciences, MARE - Marine and Environmental Sciences Centre, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Elizabete Marchante
- Department of Life Sciences, CFE - Centre for Functional Ecology, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Ana Pereira
- Department of Life Sciences, MARE - Marine and Environmental Sciences Centre, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
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13
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Juvigny-Khenafou NPD, Piggott JJ, Atkinson D, Zhang Y, Wu N, Matthaei CD. Fine sediment and flow velocity impact bacterial community and functional profile more than nutrient enrichment. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2021; 31:e02212. [PMID: 32754996 DOI: 10.1002/eap.2212] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
Freshwater ecosystems face many simultaneous pressures due to human activities. Consequently, there has been a rapid loss of freshwater biodiversity and an increase in biomonitoring programs. Our study assessed the potential of benthic stream bacterial communities as indicators of multiple-stressor impacts associated with urbanization and agricultural intensification. We conducted a fully crossed four-factor experiment in 64 flow-through mesocosms fed by a pristine montane stream (21 d of colonization, 21 d of manipulations) and investigated the effects of nutrient enrichment, flow-velocity reduction and added fine sediment after 2 and 3 weeks of stressor exposure. We used high-throughput sequencing and metabarcoding techniques (16S rRNA genes), as well as curated biological databases (METAGENassit, MetaCyc), to identify changes in bacterial relative abundances and predicted metabolic functional profile. Sediment addition and flow-velocity reduction were the most pervasive stressors. They both increased α-diversity and had strong taxon-specific effects on community composition and predicted functions. Sediment and flow velocity also interacted frequently, with 88% of all bacterial response variables showing two-way interactions and 33% showing three-way interactions including nutrient enrichment. Changes in relative abundances of common taxa were associated with shifts in dominant predicted functions, which can be extrapolated to underlaying stream-wide mechanisms such as carbon use and bacterial energy production pathways. Observed changes were largely stable over time and occurred after just 2 weeks of exposure, demonstrating that bacterial communities can be well-suited for early detection of multiple stressors. Overall, added sediment and reduced flow velocity impacted both bacterial community structure and predicted function more than nutrient enrichment. In future research and stream management, a holistic approach to studying multiple-stressor impacts should include multiple trophic levels with their functional responses, to enhance our mechanistic understanding of complex stressor effects and promote establishment of more efficient biomonitoring programs.
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Affiliation(s)
- Noël P D Juvigny-Khenafou
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Biosciences Building, Crown Street, Liverpool, L69 7ZB, UK
- Department of Health and Environmental Science, Xi'an Jiaotong-Liverpool University, 111 Ren'ai Road Suzhou, Jiangsu, 215123, China
| | - Jeremy J Piggott
- Trinity Centre for the Environment & Department of Zoology, School of Natural Sciences, Trinity College Dublin, The University of Dublin, College Green, Dublin 2, Ireland
| | - David Atkinson
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Biosciences Building, Crown Street, Liverpool, L69 7ZB, UK
| | - Yixin Zhang
- Department of Landscape Architecture, Soochow University, Suzhou, 215123, China
| | - Naicheng Wu
- Department of Health and Environmental Science, Xi'an Jiaotong-Liverpool University, 111 Ren'ai Road Suzhou, Jiangsu, 215123, China
| | - Christoph D Matthaei
- Department of Zoology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
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14
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Organic Matter Decomposition and Ecosystem Metabolism as Tools to Assess the Functional Integrity of Streams and Rivers–A Systematic Review. WATER 2020. [DOI: 10.3390/w12123523] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Streams and rivers provide important services to humans, and therefore, their ecological integrity should be a societal goal. Although ecological integrity encompasses structural and functional integrity, stream bioassessment rarely considers ecosystem functioning. Organic matter decomposition and ecosystem metabolism are prime candidate indicators of stream functional integrity, and here we review each of these functions, the methods used for their determination, and their strengths and limitations for bioassessment. We also provide a systematic review of studies that have addressed organic matter decomposition (88 studies) and ecosystem metabolism (50 studies) for stream bioassessment since the year 2000. Most studies were conducted in temperate regions. Bioassessment based on organic matter decomposition mostly used leaf litter in coarse-mesh bags, but fine-mesh bags were also common, and cotton strips and wood were frequent in New Zealand. Ecosystem metabolism was most often based on the open-channel method and used a single-station approach. Organic matter decomposition and ecosystem metabolism performed well at detecting environmental change (≈75% studies), with performances varying between 50 and 100% depending on the type of environmental change; both functions were sensitive to restoration practices in 100% of the studies examined. Finally, we provide examples where functional tools are used to complement the assessments of stream ecological integrity. With this review, we hope to facilitate the widespread incorporation of ecosystem processes into bioassessment programs with the broader aim of more effectively managing stream and river ecosystems.
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15
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Li F, Altermatt F, Yang J, An S, Li A, Zhang X. Human activities' fingerprint on multitrophic biodiversity and ecosystem functions across a major river catchment in China. GLOBAL CHANGE BIOLOGY 2020; 26:6867-6879. [PMID: 32936984 DOI: 10.1111/gcb.15357] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 08/20/2020] [Accepted: 09/04/2020] [Indexed: 06/11/2023]
Abstract
Human-induced global change dramatically alters individual aspects of river biodiversity, such as taxonomic, phylogenetic or functional diversity, and is predicted to lead to losses of associated ecosystem functions. Understanding these losses and dependencies are critical to human well-being. Until now, however, most studies have only looked either at individual organismal groups or single functions, and little is known on the effect of human activities on multitrophic biodiversity and on ecosystem multifunctionality in riverine ecosystem. Here we profiled biodiversity from bacteria to invertebrates based on environmental DNA (hereafter, 'eDNA') samples across a major river catchment in China, and analysed their dependencies with multiple ecosystem functions, especially linked to C/N/P-cycling. Firstly, we found a spatial cross-taxon congruence pattern of communities' structure in the network of the Shaying river, which was related to strong environmental filtering due to human land use. Secondly, human land use explained the decline of multitrophic and multifaceted biodiversity and ecosystem functions, but increased functional redundancy in the riverine ecosystem. Thirdly, biodiversity and ecosystem function relationships at an integrative level showed a concave-up (non-saturating) shape. Finally, structural equation modeling suggested that land use affects ecosystem functions through biodiversity-mediated pathways, including biodiversity loss and altered community interdependence in multitrophic groups. Our study highlights the value of a complete and inclusive assessment of biodiversity and ecosystem functions for an integrated land-use management of riverine ecosystems.
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Affiliation(s)
- Feilong Li
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China
| | - Florian Altermatt
- Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland
| | - Jianghua Yang
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China
| | - Shuqing An
- School of Life Sciences and Institute of Wetland Ecology, Nanjing University, Nanjing, P. R. China
- Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu, P. R. China
| | - Aimin Li
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China
| | - Xiaowei Zhang
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China
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16
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Wang F, Lin D, Li W, Dou P, Han L, Huang M, Qian S, Yao J. Meiofauna promotes litter decomposition in stream ecosystems depending on leaf species. Ecol Evol 2020; 10:9257-9270. [PMID: 32953059 PMCID: PMC7487239 DOI: 10.1002/ece3.6610] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 11/10/2022] Open
Abstract
Litter decomposition, a fundamental process of nutrient cycling and energy flow in freshwater ecosystems, is driven by a diverse array of decomposers. As an important component of the heterotrophic food web, meiofauna can provide a trophic link between leaf-associated microbes (i.e., bacteria and fungi)/plant detritus and macroinvertebrates, though their contribution to litter decomposition is not well understood. To investigate the role of different decomposer communities in litter decomposition, especially meiofauna, we compared the litter decomposition of three leaf species with different lignin to nitrogen ratios in litter bags with different mesh sizes (0.05, 0.25, and 2 mm) in a forested stream, in China for 78 days. The meiofauna significantly enhanced the decomposition of leaves of high-and medium- quality, while decreasing (negative effect) or increasing (positive effect) the fungal biomass and diversity. Macrofauna and meiofauna together contributed to the decomposition of low-quality leaf species. The presence of meiofauna and macrofauna triggered different aspects of the microbial community, with their effects on litter decomposition varying as a function of leaf quality. This study reveals that the meiofauna increased the trophic complexity and modulated their interactions with microbes, highlighting the important yet underestimated role of meiofauna in detritus-based ecosystems.
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Affiliation(s)
- Fang Wang
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Dunmei Lin
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Wei Li
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Pengpeng Dou
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Le Han
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Mingfen Huang
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Shenhua Qian
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
| | - Jingmei Yao
- Key Laboratory of the Three Gorges Reservoir Region's Eco‐EnvironmentMinistry of EducationChongqing UniversityChongqingChina
- College of Environment and EcologyChongqing UniversityChongqingChina
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17
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Biasi C, Fontana LE, Restello RM, Hepp LU. Effect of invasive Hovenia dulcis on microbial decomposition and diversity of hyphomycetes in Atlantic forest streams. FUNGAL ECOL 2020. [DOI: 10.1016/j.funeco.2019.100890] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Lemes da Silva AL, Lemes WP, Andriotti J, Petrucio MM, Feio MJ. Recent land-use changes affect stream ecosystem processes in a subtropical island in Brazil. AUSTRAL ECOL 2020. [DOI: 10.1111/aec.12879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Aurea Luiza Lemes da Silva
- Programa de Pós-Graduação em Ecologia; Departamento de Ecologia e Zoologia; Centro de Ciências Biológicas; Universidade Federal de Santa Catarina; Campus Universitário, s/n, Sala 05 - Córrego Grande 88040-900 Florianópolis Santa Catarina Brazil
| | - William Padilha Lemes
- Centro de Ciências Biológicas; Universidade Federal de Santa Catarina; Florianópolis Santa Catarina Brazil
| | - Jéssica Andriotti
- Centro de Ciências Biológicas; Universidade Federal de Santa Catarina; Florianópolis Santa Catarina Brazil
| | - Mauricio Mello Petrucio
- Programa de Pós-Graduação em Ecologia; Departamento de Ecologia e Zoologia; Centro de Ciências Biológicas; Universidade Federal de Santa Catarina; Campus Universitário, s/n, Sala 05 - Córrego Grande 88040-900 Florianópolis Santa Catarina Brazil
| | - Maria João Feio
- Departamento de Ciências da Vida; Faculdade de Ciências e Tecnologia; MARE - Centro do Mar e Ambiente; Universidade de Coimbra; Coimbra Portugal
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19
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Seena S, Casotti C, Cornut J. Inter- and intraspecific functional variability of aquatic fungal decomposers and freshwater ecosystem processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 707:135570. [PMID: 31784168 DOI: 10.1016/j.scitotenv.2019.135570] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/14/2019] [Accepted: 11/15/2019] [Indexed: 05/25/2023]
Abstract
Although considerable intraspecific trait variation is common, research dedicated to ecosystem functioning has focused mainly on species diversity. Organic matter breakdown, a key ecosystem-level process in woodland streams is mainly driven by aquatic hyphomycetes. These aquatic fungal decomposers constitute a critical link between plant litter and invertebrate detritivores in detritus-based food webs in streams. In this study, we evaluated the functional variability across a set of ten isolates each belonging to five widespread aquatic hyphomycete species, namely Articulospora tetracladia, Anguillospora crassa, Lemonniera terrestris, Neonectria lugdunensis and Tetracladium marchalianum. All the isolates originated from undisturbed streams. We estimated inter- and intraspecific variability on growth rates, litter decomposition and sporulation rates of the isolates. In addition, we also assessed the invertebrate consumption rates on leaves colonized by different isolates. Significant differences were observed within the fungal species in growth rates (A. crassa, L. terrestris, N. lugdunensis and T. marchalianum), leaf litter decomposition (A. tetracladia, L. terrestris and N. lugdunensis) and sporulation rates (A. crassa, A. tetracladia, L. terrestris and N. lugdunensis). The relative consumption rates of the shredder Schizopelex festiva significantly differed when fed with leaves colonized by isolates of L. terrestris and N. lugdunensis, however differences were not seen when fed with leaves conditioned by different species. Overall, results indicate substantial intraspecific functional variability among the isolates of aquatic hyphomycetes. Besides, our study also provides a novel insight that intraspecific functional variability is a natural phenomenon exhibited by isolates not only from polluted but also from undisturbed streams. Here the isolates demonstrated marked inter- and intraspecific functional variability, calling for a greater understanding of the functional role of aquatic hyphomycetes and its ability to influence higher trophic levels.
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Affiliation(s)
- Sahadevan Seena
- MARE-Marine and Environmental Sciences Centre, University of Coimbra, PT-3004-517 Coimbra, Portugal.
| | - Cinthia Casotti
- Laboratory of Aquatic Insect Ecology, University of Vila Velha, Vila Velha, Brazil
| | - Julien Cornut
- MARE-Marine and Environmental Sciences Centre, University of Coimbra, PT-3004-517 Coimbra, Portugal; Laboratory of Applied Microbiology, University of Applied Sciences and Arts of Southern Switzerland, via Mirasole 22A, 6501 Bellinzona, Switzerland
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20
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Jabiol J, Colas F, Guérold F. Cotton-strip assays: Let's move on to eco-friendly biomonitoring! WATER RESEARCH 2020; 170:115295. [PMID: 31751890 DOI: 10.1016/j.watres.2019.115295] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 11/03/2019] [Accepted: 11/08/2019] [Indexed: 05/25/2023]
Abstract
There is increasing recognition that functional bioindicators are needed for ecosystem health assessments. In this perspective, cotton strip assays are widely considered as a standard method to account for organic matter decomposition in streams. However, cotton cultivation and manufacture raise both environmental and societal dramatic issues that are - in our opinion - irreconcilable with the objectives of bioindication. In this study, we assessed the relevance of four alternative - eco-friendly - textiles (made of organic cotton, hemp and linen) by comparing their chemical composition and degradation rates in six streams. Chemical composition exhibited low variations among textiles, but contrasted sharply with the expectation that cotton is mostly composed of cellulose. Moreover, surprisingly high nutrient (0.49% N) contents occurred in the conventional cotton strips compared with the organic textiles (N < 0.12%). All textiles provided similar degradation rates across the six streams, meaning that they could be interchangeably used as alternatives to conventional cotton strips. We thus call for the adoption of such ethical and eco-friendly tools as 'next-generation' indicators for the functioning of stream ecosystem.
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Affiliation(s)
- Jérémy Jabiol
- LIEC-CNRS, University of Lorraine, Nancy and Metz, France.
| | - Fanny Colas
- Irstea, UR RECOVER, Pôle ECLA, Aix en Provence, France
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21
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Kielstra BW, Chau J, Richardson JS. Measuring function and structure of urban headwater streams with citizen scientists. Ecosphere 2019. [DOI: 10.1002/ecs2.2720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Brian W. Kielstra
- Department of Forest and Conservation Sciences University of British Columbia Vancouver British Columbia V6T 1Z4 Canada
| | | | - John S. Richardson
- Department of Forest and Conservation Sciences University of British Columbia Vancouver British Columbia V6T 1Z4 Canada
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22
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Seena S, Bärlocher F, Sobral O, Gessner MO, Dudgeon D, McKie BG, Chauvet E, Boyero L, Ferreira V, Frainer A, Bruder A, Matthaei CD, Fenoglio S, Sridhar KR, Albariño RJ, Douglas MM, Encalada AC, Garcia E, Ghate SD, Giling DP, Gonçalves V, Iwata T, Landeira-Dabarca A, McMaster D, Medeiros AO, Naggea J, Pozo J, Raposeiro PM, Swan CM, Tenkiano NSD, Yule CM, Graça MAS. Biodiversity of leaf litter fungi in streams along a latitudinal gradient. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 661:306-315. [PMID: 30677678 DOI: 10.1016/j.scitotenv.2019.01.122] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/09/2019] [Accepted: 01/11/2019] [Indexed: 05/20/2023]
Abstract
Global patterns of biodiversity have emerged for soil microorganisms, plants and animals, and the extraordinary significance of microbial functions in ecosystems is also well established. Virtually unknown, however, are large-scale patterns of microbial diversity in freshwaters, although these aquatic ecosystems are hotspots of biodiversity and biogeochemical processes. Here we report on the first large-scale study of biodiversity of leaf-litter fungi in streams along a latitudinal gradient unravelled by Illumina sequencing. The study is based on fungal communities colonizing standardized plant litter in 19 globally distributed stream locations between 69°N and 44°S. Fungal richness suggests a hump-shaped distribution along the latitudinal gradient. Strikingly, community composition of fungi was more clearly related to thermal preferences than to biogeography. Our results suggest that identifying differences in key environmental drivers, such as temperature, among taxa and ecosystem types is critical to unravel the global patterns of aquatic fungal diversity.
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Affiliation(s)
- Sahadevan Seena
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal; Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Felix Bärlocher
- Department of Biology, Mt. Allison University, Sackville, NB E4L 1G7, Canada
| | - Olímpia Sobral
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal; Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Mark O Gessner
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Alte Fischerhütte 2, 16775 Stechlin, Germany; Department of Ecology, Berlin Institute of Technology (TU Berlin), Ernst-Reuter-Platz 1, 10587 Berlin, Germany; Berlin Brandenburg Institute of Advanced Biodiversity Research (BBIB), Altensteinstraße 34, 14195 Berlin, Germany
| | - David Dudgeon
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Brendan G McKie
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, SE-75007 Uppsala, Sweden
| | - Eric Chauvet
- EcoLab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Luz Boyero
- Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain; IKERBASQUE, Basque Foundation for Science, Bilbao, Spain; College of Science and Engineering, James Cook University, Townsville, Qld, Australia
| | - Verónica Ferreira
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal; Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal
| | - André Frainer
- Norwegian College of Fishery Science, UiT The Arctic University of Norway, 9037 Tromsø, Norway; Department of Arctic and Marine Biology, UiT The Arctic University of Norway, 9037 Tromsø, Norway
| | - Andreas Bruder
- Department of Zoology, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Christoph D Matthaei
- Department of Zoology, University of Otago, PO Box 56, Dunedin 9054, New Zealand
| | - Stefano Fenoglio
- Department of Science and Technological Innovation, University of Piemonte Orientale, Alessandria I-15121, Italy
| | - Kandikere R Sridhar
- Department of Biosciences, Mangalore University, Mangalagangotri, Mangalore 574 199, Karnataka, India
| | | | - Michael M Douglas
- School of Earth and Environment, University of Western Australia, Perth, WA 6009, Australia; Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT 0909, Australia
| | - Andrea C Encalada
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal; Laboratorio de Ecología Acuática, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Diego de Robles y Vía Interoceánica, 17-1200-841 Quito, Ecuador
| | - Erica Garcia
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT 0909, Australia
| | - Sudeep D Ghate
- Department of Biosciences, Mangalore University, Mangalagangotri, Mangalore 574 199, Karnataka, India; Yenepoya Research Center, Yenepoya (Deemed to Be University), Deralakatte, Mangalore 575018, Karnataka, India
| | - Darren P Giling
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Alte Fischerhütte 2, 16775 Stechlin, Germany; Institute of Ecology and Evolution, Friedrich-Schiller University Jena, Dornburger Str. 15, 07743 Jena, Germany
| | - Vítor Gonçalves
- Centro de Investigação em Biodiversidade e Recursos Genéticos, CIBIO, InBIO Laboratório Associado, Pólo dos Açores & Departamento de Biologia da, Universidade dos Açores, Ponta Delgada, Açores, Portugal
| | - Tomoya Iwata
- Faculty of Life and Environmental Sciences, University of Yamanashi, Takeda, Kofu 400-8510, Japan
| | - Andrea Landeira-Dabarca
- Laboratorio de Ecología Acuática, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Diego de Robles y Vía Interoceánica, 17-1200-841 Quito, Ecuador
| | - Damien McMaster
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT 0909, Australia
| | - Adriana O Medeiros
- Laboratório de Microbiologia Ambiental Departamento de Botânica, Instituto de Biologia, Universidade Federal da Bahia, Campus Ondina, 40170-115 Salvador, BA, Brazil
| | - Josheena Naggea
- School of Science, Monash University Malaysia, Bandar Sunway, Selangor 47500, Malaysia
| | - Jesús Pozo
- Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Pedro M Raposeiro
- Centro de Investigação em Biodiversidade e Recursos Genéticos, CIBIO, InBIO Laboratório Associado, Pólo dos Açores & Departamento de Biologia da, Universidade dos Açores, Ponta Delgada, Açores, Portugal
| | - Christopher M Swan
- Department of Geography & Environmental Systems, University of Maryland, Baltimore County, 211 Sondheim Hall, 1000 Hilltop Circle, Baltimore, MD 21250, USA
| | | | - Catherine M Yule
- School of Science, Monash University Malaysia, Bandar Sunway, Selangor 47500, Malaysia; School of Science and Engineering, University of the Sunshine Coast, Queensland, Australia
| | - Manuel A S Graça
- MARE-Marine and Environmental Sciences Centre, Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal; Department of Life Sciences, University of Coimbra, 3004-517 Coimbra, Portugal
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Cristiano G, Cicolani B, Miccoli FP, Di Sabatino A. A modification of the leaf-bags method to assess spring ecosystem functioning: benthic invertebrates and leaf-litter breakdown in Vera Spring (Central Italy). PeerJ 2019; 7:e6250. [PMID: 30783561 PMCID: PMC6377591 DOI: 10.7717/peerj.6250] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/10/2018] [Indexed: 12/02/2022] Open
Abstract
The evaluation of leaf detritus processing (decomposition and breakdown) is one of the most simple and cost-effective method to assess the functional characteristics of freshwater ecosystems. However, in comparison with other freshwater habitats, information on leaf litter breakdown in spring ecosystems is still scarce and fragmentary. In this paper, we present results of the first application of a variant of the leaf-bags method to assess structure of macroinvertebrate assemblages and leaf-litter breakdown in a Central Apennines (Italy) cold spring which was investigated from July 2016 to October 2016. Notwithstanding the stable conditions of almost all hydrological and physico-chemical parameters, we found significant temporal differences in (i) % of mass loss of poplar leaves (ii) number of Ephemeroptera, Plecoptera and Trichoptera taxa, (iii) shredder and predator densities. We demonstrate that detritus processing in cold springs may be faster than or as fast as in warmer streams/rivers. Shredders activity and biocoenotic interactions, rather than temperature and nutrients load, were the main drivers of the process. A routine application of the modified leaf-bags may contribute to expand our knowledge on detritus processing in cold springs and may help to predict impacts of climate warming on freshwater ecosystem functioning.
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Affiliation(s)
- Giovanni Cristiano
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Bruno Cicolani
- Department of Civil, Construction-Architecture & Environmental Engineering, University of L'Aquila, L'Aquila, Italy
| | - Francesco Paolo Miccoli
- Department of Civil, Construction-Architecture & Environmental Engineering, University of L'Aquila, L'Aquila, Italy
| | - Antonio Di Sabatino
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
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24
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Smeti E, von Schiller D, Karaouzas I, Laschou S, Vardakas L, Sabater S, Tornés E, Monllor-Alcaraz LS, Guillem-Argiles N, Martinez E, Barceló D, López de Alda M, Kalogianni E, Elosegi A, Skoulikidis N. Multiple stressor effects on biodiversity and ecosystem functioning in a Mediterranean temporary river. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 647:1179-1187. [PMID: 30180326 DOI: 10.1016/j.scitotenv.2018.08.105] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 08/07/2018] [Accepted: 08/07/2018] [Indexed: 06/08/2023]
Abstract
The hydrological and biological complexity of temporary rivers as well as their importance in providing goods and services is increasingly recognized, as much as it is the vulnerability of the biotic communities in view of climate change and increased anthropogenic pressures. However, the effects of flow intermittency (resulting from both seasonal variations and rising hydrological pressure) and pollution on biodiversity and ecosystem functioning have been overlooked in these ecosystems. We explore the way multiple stressors affect biodiversity and ecosystem functioning, as well as the biodiversity-ecosystem functioning (B-EF) relationship in a Mediterranean temporary river. We measured diversity of benthic communities (i.e. diatoms and macroinvertebrates) and related ecosystem processes (i.e. resource use efficiency-RUE and organic matter breakdown-OMB) across a pollution and flow intermittency gradient. Our results showed decreases in macroinvertebrate diversity and the opposite trend in diatom assemblages, whereas ecosystem functioning was negatively affected by both pollution and flow intermittency. The explored B-EF relationships showed contrasting results: RUE decreased with higher diatom diversity, whereas OMB increased with increased macroinvertebrate diversity. The different responses suggest contrasting operating mechanisms, selection effects possibly driving the B-EF relationship in diatoms and complementarity effects driving the B-EF relationship in macroinvertebrates. The understanding of multiple stressor effects on diversity and ecosystem functioning, as well as the B-EF relationship in temporary rivers could provide insights on the risks affecting ecosystem functioning under global change.
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Affiliation(s)
- Evangelia Smeti
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece.
| | - Daniel von Schiller
- Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Ioannis Karaouzas
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Sofia Laschou
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Leonidas Vardakas
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Sergi Sabater
- Catalan Institute for Water Research (ICRA), Scientific and Technologic Park of the University of Girona, Girona, Spain; Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Elisabet Tornés
- Catalan Institute for Water Research (ICRA), Scientific and Technologic Park of the University of Girona, Girona, Spain; Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Luis Simón Monllor-Alcaraz
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Nuria Guillem-Argiles
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Elena Martinez
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Damià Barceló
- Catalan Institute for Water Research (ICRA), Scientific and Technologic Park of the University of Girona, Girona, Spain; Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Miren López de Alda
- Water and Soil Quality Research Group, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Eleni Kalogianni
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
| | - Arturo Elosegi
- Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Nikolaos Skoulikidis
- Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research (HCMR), 46.7 km Athens-Sounio Ave., Anavyssos, 19013 Athens, Greece
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Similar recovery time of microbial functions from fungicide stress across biogeographical regions. Sci Rep 2018; 8:17021. [PMID: 30451978 PMCID: PMC6242862 DOI: 10.1038/s41598-018-35397-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 11/05/2018] [Indexed: 11/09/2022] Open
Abstract
Determining whether the structural and functional stress responses of communities are similar across space and time is paramount for forecasting and extrapolating the consequences of anthropogenic pressures on ecosystems and their services. Stream ecosystems are under high anthropogenic pressure; however, studies have only examined the response of stream communities across large scales over multiple generations. We studied the responses of leaf-associated microbial communities in streams within three European biogeographical regions to chemical stress in a microcosm experiment with multiple cycles of fungicide pollution and resource colonisation. Fungal community composition and the ecosystem function leaf decomposition were measured as response variables. Microbial leaf decomposition showed similar recovery times under environmental levels of fungicide exposure across regions. Initially, the decomposition declined (between 19 and 53%) under fungicide stress and recovered to control levels during the third cycle of pollution and colonisation. Although community composition and its stress response varied between regions, this suggests similar functional community adaptation towards fungicide stress over time. Genetic, epigenetic and physiological adaptations, as well as species turnover, may have contributed to community adaptation but further studies are required to determine if and to which extent these mechanisms are operating. Overall, our findings provide the first evidence of a similar functional response of microbial leaf decomposition to chemical stress across space and time.
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Yeung ACY, Musetta-Lambert JL, Kreutzweiser DP, Sibley PK, Richardson JS. Relations of interannual differences in stream litter breakdown with discharge: bioassessment implications. Ecosphere 2018. [DOI: 10.1002/ecs2.2423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Alex C. Y. Yeung
- Department of Forest and Conservation Sciences; The University of British Columbia; Vancouver British Columbia V6T 1Z4 Canada
| | | | - David P. Kreutzweiser
- Canadian Forest Service; Natural Resources Canada; Sault Ste. Marie Ontario P6A 2E5 Canada
| | - Paul K. Sibley
- School of Environmental Sciences; University of Guelph; Guelph Ontario N1G 2W1 Canada
| | - John S. Richardson
- Department of Forest and Conservation Sciences; The University of British Columbia; Vancouver British Columbia V6T 1Z4 Canada
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Priming of leaf litter decomposition by algae seems of minor importance in natural streams during autumn. PLoS One 2018; 13:e0200180. [PMID: 30192753 PMCID: PMC6128472 DOI: 10.1371/journal.pone.0200180] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 08/15/2018] [Indexed: 11/19/2022] Open
Abstract
Allochthonous detritus of terrestrial origin is one of the main energy sources in forested headwater streams, but its poor nutritional quality makes it difficult to use by heterotrophs. It has been suggested that algae growing on this detritus can enhance its nutritional quality and promote decomposition. So far, most evidence of this "priming effect” is derived from laboratory or mesocosm experiments, and its importance under natural conditions is unclear. We measured accrual of algae, phosphorus uptake capacity, and decomposition of poplar leaves in autumn in open- and closed-canopy reaches in 3 forest and 3 agricultural streams. Chlorophyll a abundance did not change significantly with stream type or with canopy cover, although in some agricultural streams it was higher in open than in closed canopy reaches. Canopy cover did not affect either phosphate uptake capacity or microbial decomposition. On the other hand, although there was no effect of canopy cover on invertebrate fragmentation rate, a significant interaction between canopy cover and stream suggests priming occurs at least in some streams. Overall, the results point to a weak or no priming effect of algae on litter decomposition in natural streams during autumn.
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von Schiller D, Acuña V, Aristi I, Arroita M, Basaguren A, Bellin A, Boyero L, Butturini A, Ginebreda A, Kalogianni E, Larrañaga A, Majone B, Martínez A, Monroy S, Muñoz I, Paunović M, Pereda O, Petrovic M, Pozo J, Rodríguez-Mozaz S, Rivas D, Sabater S, Sabater F, Skoulikidis N, Solagaistua L, Vardakas L, Elosegi A. River ecosystem processes: A synthesis of approaches, criteria of use and sensitivity to environmental stressors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 596-597:465-480. [PMID: 28458222 DOI: 10.1016/j.scitotenv.2017.04.081] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/11/2017] [Accepted: 04/11/2017] [Indexed: 06/07/2023]
Abstract
River ecosystems are subject to multiple stressors that affect their structure and functioning. Ecosystem structure refers to characteristics such as channel form, water quality or the composition of biological communities, whereas ecosystem functioning refers to processes such as metabolism, organic matter decomposition or secondary production. Structure and functioning respond in contrasting and complementary ways to environmental stressors. Moreover, assessing the response of ecosystem functioning to stressors is critical to understand the effects on the ecosystem services that produce direct benefits to humans. Yet, there is more information on structural than on functional parameters, and despite the many approaches available to measure river ecosystem processes, structural approaches are more widely used, especially in management. One reason for this discrepancy is the lack of synthetic studies analyzing river ecosystem functioning in a way that is useful for both scientists and managers. Here, we present a synthesis of key river ecosystem processes, which provides a description of the main characteristics of each process, including criteria guiding their measurement as well as their respective sensitivity to stressors. We also discuss the current limitations, potential improvements and future steps that the use of functional measures in rivers needs to face.
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Affiliation(s)
- Daniel von Schiller
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain.
| | - Vicenç Acuña
- Catalan Institute for Water Research (ICRA), Carrer Emili Grahit 101, 17003 Girona, Spain
| | - Ibon Aristi
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Maite Arroita
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Ana Basaguren
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Alberto Bellin
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, I-38123 Trento, Italy
| | - Luz Boyero
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain; IKERBASQUE, Basque Foundation for Science, María Díaz Haroko 3, 48013 Bilbao, Spain; College of Marine and Environmental Sciences, James Cook University, 4811 Townsville, Queensland, Australia
| | - Andrea Butturini
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Antoni Ginebreda
- Water and Soil Quality Research Group, Department of Environmental Chemistry (IDAEA-CSIC), Carrer Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Eleni Kalogianni
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, P.O. Box 712, 19013 Anavissos Attica, Greece
| | - Aitor Larrañaga
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Bruno Majone
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, I-38123 Trento, Italy
| | - Aingeru Martínez
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Silvia Monroy
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Isabel Muñoz
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Momir Paunović
- Institute for Biological Research "Siniša Stanković", University of Belgrade, Bulevardespota Stefana 142, 11000 Belgrade, Serbia
| | - Olatz Pereda
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Mira Petrovic
- Catalan Institute for Water Research (ICRA), Carrer Emili Grahit 101, 17003 Girona, Spain; ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | - Jesús Pozo
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Sara Rodríguez-Mozaz
- Catalan Institute for Water Research (ICRA), Carrer Emili Grahit 101, 17003 Girona, Spain
| | - Daniel Rivas
- Water and Soil Quality Research Group, Department of Environmental Chemistry (IDAEA-CSIC), Carrer Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Sergi Sabater
- Catalan Institute for Water Research (ICRA), Carrer Emili Grahit 101, 17003 Girona, Spain; GRECO, Institute of Aquatic Ecology, University of Girona, Campus Montilivi, 17071 Girona, Spain
| | - Francesc Sabater
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Nikolaos Skoulikidis
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, P.O. Box 712, 19013 Anavissos Attica, Greece
| | - Libe Solagaistua
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Leonidas Vardakas
- Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters, P.O. Box 712, 19013 Anavissos Attica, Greece
| | - Arturo Elosegi
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
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Kamenova S, Bartley T, Bohan D, Boutain J, Colautti R, Domaizon I, Fontaine C, Lemainque A, Le Viol I, Mollot G, Perga ME, Ravigné V, Massol F. Invasions Toolkit. ADV ECOL RES 2017. [DOI: 10.1016/bs.aecr.2016.10.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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