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Li C, Tang Y, Sun W, Xia J, Xia Z, Zhang J, He P, Liu J, Zhao S. Physiological responses of Ampithoe valida and its feeding potential on Ulva prolifera. MARINE ENVIRONMENTAL RESEARCH 2023; 186:105942. [PMID: 36924535 DOI: 10.1016/j.marenvres.2023.105942] [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: 11/25/2022] [Revised: 01/21/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Large numbers of Amphipoda feed on floating green tide macroalgae in the Yellow Sea, among which Ampithoe valida has a high abundance in the stable and decline periods. Amphipoda preferentially feed on Ulva. Under different temperatures, salinities, and pH, the physiological responses of A. valida and its feeding potential on Ulva prolifera were investigated, along with its physiological responses during green tide blooms in the Southern Yellow Sea. Ampithoe valida could survive within a temperature range of 5-30 °C, salinity of 5-40, and pH of 4-10. Optimal environmental conditions for growth were temperature 15-25 °C, salinity 10-40, and pH 6-10. At temperatures of 5-30 °C, salinities of 5-35, and pH of 4-9, A. valida could effectively reduce U. prolifera biomass. The feeding ability of A. valida was greatest in 25-30 °C, 10-25 salinity, and neutral seawater, exceeding 5 mg·ind.-1·d-1. During green tide outbreaks in the Southern Yellow Sea from May to August, the monthly average sea surface temperature, salinity, and pH range is 17.5-27.3 °C, 23.8-29.6, and 7.87-8.17, respectively, within which A. valida showed well growth and could effectively reduce U. prolifera biomass. Finally, this study further discussed the possibility of A. valida as a biological method to control green tide.
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Affiliation(s)
- Chongxiang Li
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361104, China
| | - Yiyuan Tang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
| | - Wenhui Sun
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
| | - Jing Xia
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; School of Oceanography, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Zhangyi Xia
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China
| | - Jianheng Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, 222005, China.
| | - Peimin He
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, 222005, China.
| | - Jinlin Liu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; The Key Laboratory of Zoological Systematics and Application, Hebei University, Baoding, 071002, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, 222005, China.
| | - Shuang Zhao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, 222005, China.
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2
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Díaz-Morales DM, Bommarito C, Knol J, Grabner DS, Noè S, Rilov G, Wahl M, Guy-Haim T, Sures B. Parasitism enhances gastropod feeding on invasive and native algae while altering essential energy reserves for organismal homeostasis upon warming. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 863:160727. [PMID: 36502976 DOI: 10.1016/j.scitotenv.2022.160727] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 11/22/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Marine bioinvasions are of increasing attention due to their potential of causing ecological and economic loss. The seaweed Gracilaria vermiculophylla has recently invaded the Baltic Sea, where, under certain conditions, it was found to outcompete the native alga Fucus vesiculosus. Parasites of grazers and temperature are among the potential factors which might indirectly modulate the interactions between these co-occurring algae through their single and combined effects on grazing rates. We tested the temperature and parasitism effects on the feeding of the gastropod Littorina littorea on F. vesiculosus vs. G. vermiculophylla. Uninfected and trematode-infected gastropods were exposed to 10, 16, 22, and 28 °C for 4 days while fed with either algae. Faeces production was determined as a proxy for grazing rate, and HSP70 expression, glycogen and lipid concentrations were used to assess the gastropod's biochemical condition. Gracilaria vermiculophylla was grazed more than F. vesiculosus. Trematode infection significantly enhanced faeces production, decreased glycogen concentrations, and increased lipid concentrations in the gastropod. Warming significantly affected glycogen and lipid concentrations, with glycogen peaking at 16 °C and lipids at 22 °C. Although not significant, warming and trematode infection increased HSP70 levels. Increased faeces production in infected snails and higher faeces production by L. littorea fed with G. vermiculophylla compared to those which fed on F. vesiculosus, suggest parasitism as an important indirect modulator of the interaction between these algae. The changes in the gastropod's biochemical condition indicate that thermal stress induced the mobilization of energy reserves, suggesting a possible onset of compensatory metabolism. Finally, glycogen decrease in infected snails compared to uninfected ones might make them more susceptible to thermal stress.
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Affiliation(s)
- Dakeishla M Díaz-Morales
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Essen, Germany.
| | - Claudia Bommarito
- Benthic and Experimental Ecology Department, GEOMAR, Helmholtz Centre for Ocean Research, Kiel, Germany.
| | - Jeffrey Knol
- Groningen Institute for Evolutionary Life Sciences - GELIFES, University of Groningen, Groningen, the Netherlands.
| | - Daniel S Grabner
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Essen, Germany.
| | - Simona Noè
- Israel Oceanographic and Limnological Research, National Institute of Oceanography, Haifa, Israel; Stazione Zoologica Anton Dohrn, Marine Animal Conservation and Public Engagement, Naples, Italy.
| | - Gil Rilov
- Israel Oceanographic and Limnological Research, National Institute of Oceanography, Haifa, Israel; The Leon H. Charney School of Marine Sciences, Marine Biology Department, University of Haifa, Mt. Carmel, Haifa, 31905, Israel.
| | - Martin Wahl
- Benthic and Experimental Ecology Department, GEOMAR, Helmholtz Centre for Ocean Research, Kiel, Germany.
| | - Tamar Guy-Haim
- Israel Oceanographic and Limnological Research, National Institute of Oceanography, Haifa, Israel.
| | - Bernd Sures
- Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Essen, Germany; Research Center One Health Ruhr, Research Alliance Ruhr, University Duisburg-Essen, Essen, Germany.
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van Moorsel SJ, Thébault E, Radchuk V, Narwani A, Montoya JM, Dakos V, Holmes M, De Laender F, Pennekamp F. Predicting effects of multiple interacting global change drivers across trophic levels. GLOBAL CHANGE BIOLOGY 2023; 29:1223-1238. [PMID: 36461630 PMCID: PMC7614140 DOI: 10.1111/gcb.16548] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/18/2022] [Accepted: 11/23/2022] [Indexed: 05/26/2023]
Abstract
Global change encompasses many co-occurring anthropogenic drivers, which can act synergistically or antagonistically on ecological systems. Predicting how different global change drivers simultaneously contribute to observed biodiversity change is a key challenge for ecology and conservation. However, we lack the mechanistic understanding of how multiple global change drivers influence the vital rates of multiple interacting species. We propose that reaction norms, the relationships between a driver and vital rates like growth, mortality, and consumption, provide insights to the underlying mechanisms of community responses to multiple drivers. Understanding how multiple drivers interact to affect demographic rates using a reaction-norm perspective can improve our ability to make predictions of interactions at higher levels of organization-that is, community and food web. Building on the framework of consumer-resource interactions and widely studied thermal performance curves, we illustrate how joint driver impacts can be scaled up from the population to the community level. A simple proof-of-concept model demonstrates how reaction norms of vital rates predict the prevalence of driver interactions at the community level. A literature search suggests that our proposed approach is not yet used in multiple driver research. We outline how realistic response surfaces (i.e., multidimensional reaction norms) can be inferred by parametric and nonparametric approaches. Response surfaces have the potential to strengthen our understanding of how multiple drivers affect communities as well as improve our ability to predict when interactive effects emerge, two of the major challenges of ecology today.
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Affiliation(s)
- Sofia J. van Moorsel
- Department of Evolutionary Biology and Environmental StudiesUniversity of ZurichZurichSwitzerland
- Department of GeographyUniversity of ZurichZurichSwitzerland
| | - Elisa Thébault
- Sorbonne Université, CNRS, IRD, INRAE, Université Paris Est Créteil, Université Paris Cité, Institute of Ecology and Environmental Sciences of Paris (iEES‐Paris)ParisFrance
| | - Viktoriia Radchuk
- Department of Ecological DynamicsLeibniz Institute for Zoo and Wildlife ResearchBerlinGermany
| | - Anita Narwani
- Department of Aquatic EcologyEawagDübendorfSwitzerland
| | - José M. Montoya
- Theoretical and Experimental Ecology StationCNRSMoulisFrance
| | - Vasilis Dakos
- Institut des Sciences de l'Evolution de Montpellier (ISEM)Université de Montpellier, IRD, EPHEMontpellierFrance
| | - Mark Holmes
- Namur Institute for Complex Systems (naXys), Institute of Life, Earth, and Environment (ILEE), Research Unit in Environmental and Evolutionary Biology, University of NamurNamurBelgium
| | - Frederik De Laender
- Namur Institute for Complex Systems (naXys), Institute of Life, Earth, and Environment (ILEE), Research Unit in Environmental and Evolutionary Biology, University of NamurNamurBelgium
| | - Frank Pennekamp
- Department of Evolutionary Biology and Environmental StudiesUniversity of ZurichZurichSwitzerland
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4
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Olson AM, Prentice C, Monteith ZL, VanMaanen D, Juanes F, Hessing-Lewis M. Grazing preference and isotopic contributions of kelp to Zostera marina mesograzers. FRONTIERS IN PLANT SCIENCE 2022; 13:991744. [PMID: 36311148 PMCID: PMC9608150 DOI: 10.3389/fpls.2022.991744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
In seagrass food webs, small invertebrate mesograzers often exert top-down control on algal epiphytes growing on seagrass blades, which in turn releases the seagrass from competition for light and nutrients. Yet, nearshore habitat boundaries are permeable, and allochthonous subsidies can provide alternative food sources to in-situ production in seagrass meadows, which may in turn alter mesograzer-epiphyte interactions. We examined the contribution of allochthonous kelp (Nereocystis luetkeana), autochthonous epiphytic macroalgal (Smithora naiadum), Ulva lactuca, and seagrass production to mesograzer diets in a subtidal Zostera marina (eelgrass) meadow. In both choice feeding experiments and isotopic analysis, mesograzer diets revealed a preference for allochthonous N. luetkeana over Z. marina, S. naiadum, and U. lactuca. Notably, Idotea resecata showed an ~20x greater consumption rate for N. luetkeana in feeding experiments over other macrophytes. In the meadow, we found a positive relationship between epiphytic S. naiadum and gammarid amphipod biomass suggesting weak top-down control on the S. naiadum biomass. Epiphyte biomass may be driven by bottom-up factors such as environmental conditions, or the availability and preference of allochthonous kelp, though further work is needed to disentangle these interactions. Additionally, we found that gammarid and caprellid amphipod biomass were positively influenced by adjacency to kelp at seagrass meadow edges. Our findings suggest that N. luetkeana kelp subsidies are important to the diets of mesograzers in Z. marina meadows. Spatial planning and management of marine areas should consider trophic linkages between kelp and eelgrass habitats as a critical seascape feature if the goal is to conserve nearshore food web structure and function.
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Affiliation(s)
- Angeleen M. Olson
- Nearshore Ecology, Hakai Institute, Heriot Bay, BC, Canada
- Fisheries Ecology and Conservation Lab, Department of Biology, University of Victoria, Victoria, BC, Canada
| | | | | | | | - Francis Juanes
- Fisheries Ecology and Conservation Lab, Department of Biology, University of Victoria, Victoria, BC, Canada
| | - Margot Hessing-Lewis
- Nearshore Ecology, Hakai Institute, Heriot Bay, BC, Canada
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada
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5
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Spiecker BJ, Menge BA. El Niño and marine heatwaves: Ecological impacts on Oregon rocky intertidal kelp communities at local to regional scales. ECOL MONOGR 2022. [DOI: 10.1002/ecm.1504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Bruce A. Menge
- Department of Integrative Biology Oregon State University Corvallis OR USA
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6
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Ullah H, Fordham DA, Nagelkerken I. Climate change negates positive CO 2 effects on marine species biomass and productivity by altering the strength and direction of trophic interactions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 801:149624. [PMID: 34419906 DOI: 10.1016/j.scitotenv.2021.149624] [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: 10/18/2020] [Revised: 08/06/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
One of the biggest challenges in more accurately forecasting the effects of climate change on future food web dynamics relates to how climate change affects multi-trophic species interactions, particularly when multiple interacting stressors are considered. Using a dynamic food web model, we investigate the individual and combined effect of ocean warming and acidification on changes in trophic interaction strengths (both direct and indirect) and the consequent effects on biomass structure of food web functional groups. To do this, we mimicked a species-rich multi-trophic-level temperate shallow-water rocky reef food web and integrated empirical data from mesocosm experiments on altered species interactions under warming and acidification, into food-web models. We show that a low number of strong temperature-driven changes in direct trophic interactions (feeding and competition) will largely determine the magnitude of biomass change (either increase or decrease) of high-order consumers, with increasing consumer biomass suppressing that of prey species. Ocean acidification, in contrast, alters a large number of weak indirect interactions (e.g. cascading effects of increased or decreased abundances of other groups), enabling a large increase in consumer and prey biomass. The positive effects of ocean acidification are driven by boosted primary productivity, with energy flowing up to higher trophic levels. We show that warming is a much stronger driver of positive as well as negative modifications of species biomass compared to ocean acidification. Warming affects a much smaller number of existing trophic interactions, though, with direct consumer-resource effects being more important than indirect effects. We conclude that the functional role of consumers in future food webs will be largely regulated by alterations in the strength of direct trophic interactions under ocean warming, with ensuing effects on the biomass structure of marine food webs.
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Affiliation(s)
- Hadayet Ullah
- Southern Seas Ecology Laboratories, School of Biological Sciences and the Environment Institute, The University of Adelaide, Adelaide, Australia
| | - Damien A Fordham
- School of Biological Sciences and the Environment Institute, The University of Adelaide, Adelaide, Australia
| | - Ivan Nagelkerken
- Southern Seas Ecology Laboratories, School of Biological Sciences and the Environment Institute, The University of Adelaide, Adelaide, Australia; School of Biological Sciences and the Environment Institute, The University of Adelaide, Adelaide, Australia.
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7
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Biodiversity of coral reef cryptobiota shuffles but does not decline under the combined stressors of ocean warming and acidification. Proc Natl Acad Sci U S A 2021; 118:2103275118. [PMID: 34544862 PMCID: PMC8488634 DOI: 10.1073/pnas.2103275118] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2021] [Indexed: 12/31/2022] Open
Abstract
Ocean-warming and acidification are predicted to reduce coral reef biodiversity, but the combined effects of these stressors on overall biodiversity are largely unmeasured. Here, we examined the individual and combined effects of elevated temperature (+2 °C) and reduced pH (-0.2 units) on the biodiversity of coral reef communities that developed on standardized sampling units over a 2-y mesocosm experiment. Biodiversity and species composition were measured using amplicon sequencing libraries targeting the cytochrome oxidase I (COI) barcoding gene. Ocean-warming significantly increased species richness relative to present-day control conditions, whereas acidification significantly reduced richness. Contrary to expectations, species richness in the combined future ocean treatment with both warming and acidification was not significantly different from the present-day control treatment. Rather than the predicted collapse of biodiversity under the dual stressors, we find significant changes in the relative abundance but not in the occurrence of species, resulting in a shuffling of coral reef community structure among the highly species-rich cryptobenthic community. The ultimate outcome of altered community structure for coral reef ecosystems will depend on species-specific ecological functions and community interactions. Given that most species on coral reefs are members of the understudied cryptobenthos, holistic research on reef communities is needed to accurately predict diversity-function relationships and ecosystem responses to future climate conditions.
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8
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Falkenberg LJ, Scanes E, Ducker J, Ross PM. Biotic habitats as refugia under ocean acidification. CONSERVATION PHYSIOLOGY 2021; 9:coab077. [PMID: 34540232 PMCID: PMC8445512 DOI: 10.1093/conphys/coab077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 07/25/2021] [Accepted: 08/19/2021] [Indexed: 06/13/2023]
Abstract
Habitat-forming organisms have an important role in ameliorating stressful conditions and may be of particular relevance under a changing climate. Increasing CO2 emissions are driving a range of environmental changes, and one of the key concerns is the rapid acceleration of ocean acidification and associated reduction in pH. Such changes in seawater chemistry are anticipated to have direct negative effects on calcifying organisms, which could, in turn, have negative ecological, economic and human health impacts. However, these calcifying organisms do not exist in isolation, but rather are part of complex ecosystems. Here, we use a qualitative narrative synthesis framework to explore (i) how habitat-forming organisms can act to restrict environmental stress, both now and in the future; (ii) the ways their capacity to do so is modified by local context; and (iii) their potential to buffer the effects of future change through physiological processes and how this can be influenced by management adopted. Specifically, we highlight examples that consider the ability of macroalgae and seagrasses to alter water carbonate chemistry, influence resident organisms under current conditions and their capacity to do so under future conditions, while also recognizing the potential role of other habitats such as adjacent mangroves and saltmarshes. Importantly, we note that the outcome of interactions between these functional groups will be context dependent, influenced by the local abiotic and biotic characteristics. This dependence provides local managers with opportunities to create conditions that enhance the likelihood of successful amelioration. Where individuals and populations are managed effectively, habitat formers could provide local refugia for resident organisms of ecological and economic importance under an acidifying ocean.
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Affiliation(s)
- Laura J Falkenberg
- Simon F.S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR
| | - Elliot Scanes
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, New South Wales, 2006, Australia
- Climate Change Cluster, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia
| | - James Ducker
- Simon F.S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR
| | - Pauline M Ross
- School of Life and Environmental Sciences, The University of Sydney, Camperdown, New South Wales, 2006, Australia
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9
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Martins I, Azevedo A, Goméz I, Valente L. Variation on the standing stock of Gracilaria sp. in a temperate estuary under single-stressor and multiple-stressor climate change scenarios. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Warming and temperature variability determine the performance of two invertebrate predators. Sci Rep 2020; 10:6780. [PMID: 32321937 PMCID: PMC7176636 DOI: 10.1038/s41598-020-63679-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 04/03/2020] [Indexed: 02/05/2023] Open
Abstract
In a warming ocean, temperature variability imposes intensified peak stress, but offers periods of stress release. While field observations on organismic responses to heatwaves are emerging, experimental evidence is rare and almost lacking for shorter-scale environmental variability. For two major invertebrate predators, we simulated sinusoidal temperature variability (±3 °C) around todays' warm summer temperatures and around a future warming scenario (+4 °C) over two months, based on high-resolution 15-year temperature data that allowed implementation of realistic seasonal temperature shifts peaking midpoint. Warming decreased sea stars' (Asterias rubens) energy uptake (Mytilus edulis consumption) and overall growth. Variability around the warming scenario imposed additional stress onto Asterias leading to an earlier collapse in feeding under sinusoidal fluctuations. High-peak temperatures prevented feeding, which was not compensated during phases of stress release (low-temperature peaks). In contrast, increased temperatures increased feeding on Mytilus but not growth rates of the recent invader Hemigrapsus takanoi, irrespective of the scale at which temperature variability was imposed. This study highlights species-specific impacts of warming and identifies temperature variability at the scale of days to weeks/months as important driver of thermal responses. When species' thermal limits are exceeded, temperature variability represents an additional source of stress as seen from future warming scenarios.
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11
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Murphy GEP, Romanuk TN, Worm B. Cascading effects of climate change on plankton community structure. Ecol Evol 2020; 10:2170-2181. [PMID: 32128147 PMCID: PMC7042755 DOI: 10.1002/ece3.6055] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 09/16/2019] [Accepted: 09/26/2019] [Indexed: 12/18/2022] Open
Abstract
Plankton communities account for at least half of global primary production and play a key role in the global carbon cycle. Warming and acidification may alter the interaction chains in these communities from the bottom and top of the food web. Yet, the relative importance of these potentially complex interactions has not yet been quantified. Here, we examine the isolated and combined effects of warming, acidification, and reductions in phytoplankton and predator abundances in a series of factorial experiments. We find that warming directly impacts the top of the food web, but that the intermediate trophic groups are more strongly influenced by indirect effects mediated by altered top-down interactions. Direct manipulations of predator and phytoplankton abundance reveal similar strong top-down interactions following top predator decline. A meta-analysis of published experiments further supports the conclusion that warming has stronger direct impacts on the top and bottom of the food web rather than the intermediate trophic groups, with important differences between freshwater and marine plankton communities. Our results reveal that the trophic effect of warming cascading down from the top of the plankton food web is a powerful agent of global change.
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Affiliation(s)
| | | | - Boris Worm
- Department of BiologyDalhousie UniversityHalifaxNSCanada
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12
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Miranda RJ, Coleman MA, Tagliafico A, Rangel MS, Mamo LT, Barros F, Kelaher BP. Invasion-mediated effects on marine trophic interactions in a changing climate: positive feedbacks favour kelp persistence. Proc Biol Sci 2019; 286:20182866. [PMID: 30900532 PMCID: PMC6452063 DOI: 10.1098/rspb.2018.2866] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/28/2019] [Indexed: 12/24/2022] Open
Abstract
The interactive effects of ocean warming and invasive species are complex and remain a source of uncertainty for projecting future ecological change. Climate-mediated change to trophic interactions can have pervasive ecological consequences, but the role of invasion in mediating trophic effects is largely unstudied. Using manipulative experiments in replicated outdoor mesocosms, we reveal how near-future ocean warming and macrophyte invasion scenarios interactively impact gastropod grazing intensity and preference for consumption of foundation macroalgae ( Ecklonia radiata and Sargassum vestitum). Elevated water temperature increased the consumption of both macroalgae through greater grazing intensity. Given the documented decline of kelp ( E. radiata) growth at higher water temperatures, enhanced grazing could contribute to the shift from kelp-dominated to Sargassum-dominated reefs that is occurring at the low-latitude margins of kelp distribution. However, the presence of a native invader ( Caulerpa filiformis) was related to low consumption by the herbivores on dominant kelp at warmer temperatures. Thus, antagonistic effects between climate change and a range expanding species can favour kelp persistence in a warmer future. Introduction of species should, therefore, not automatically be considered unfavourable under climate change scenarios. Climatic changes are increasing the need for effective management actions to address the interactive effects of multiple stressors and their ecological consequences, rather than single threats in isolation.
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Affiliation(s)
- Ricardo J. Miranda
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
- Laboratório de Ecologia Bentônica, Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Centro Interdisciplinar em Energia e Meio Ambiente, Universidade Federal da Bahia, Salvador, BA 40170-290, Brazil
| | - Melinda A. Coleman
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
- Department of Primary Industries, New South Wales Fisheries, National Marine Science Centre, 2 Bay Drive, Coffs Harbour, New South Wales 2450, Australia
| | - Alejandro Tagliafico
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
| | - Maria S. Rangel
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
| | - Lea T. Mamo
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
| | - Francisco Barros
- Laboratório de Ecologia Bentônica, Programa de Pós-Graduação em Ecologia, Instituto de Biologia, Centro Interdisciplinar em Energia e Meio Ambiente, Universidade Federal da Bahia, Salvador, BA 40170-290, Brazil
| | - Brendan P. Kelaher
- National Marine Science Centre, Southern Cross University, Coffs Harbour, New South Wales 2450, Australia
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13
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Grilo TF, Repolho T, Rosa R, Cardoso PG. Performance and herbivory of the tropical topshell Trochus histrio under short-term temperature increase and high CO 2. MARINE POLLUTION BULLETIN 2019; 138:295-301. [PMID: 30660276 DOI: 10.1016/j.marpolbul.2018.11.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 11/03/2018] [Accepted: 11/08/2018] [Indexed: 06/09/2023]
Abstract
Within tropical environments, short-term impacts of increased seawater temperature and pCO2 on algae-herbivore interactions remain poorly understood. We investigated the isolated and combined 7-day effects of increased temperature (+4 °C) and pCO2 (~1000 μatm) on the trophic interaction Ulva sp./Trochus histrio, by assessing: i) topshells' survival and condition index; ii) grazer consumption rates, nutritional composition and interaction strength expressed as a dynamic index. No survival differences were observed whilst body condition varied significantly. Topshells under high pCO2 displayed poor performance, concomitant with lower consumption of macroalgae. Individuals exposed to increased temperature had better physical condition, thus stimulating herbivory, which in turn was negatively correlated with carbon and nitrogen contents. The dynamic index was temperature- and pCO2- interactively dependent, suggesting lower grazing pressure under single acidification. Despite some limitations inherent to a short-term exposure, this study provides new insights to accurately predict tropical species' phenotypic responses in a changing ocean.
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Affiliation(s)
- Tiago F Grilo
- MARE - Centro de Ciências do Mar e do Ambiente, Laboratório Marítimo da Guia, Faculdade de Ciências da Universidade de Lisboa, Av. Nossa Senhora do Cabo, 939, 2750-374 Cascais, Portugal.
| | - Tiago Repolho
- MARE - Centro de Ciências do Mar e do Ambiente, Laboratório Marítimo da Guia, Faculdade de Ciências da Universidade de Lisboa, Av. Nossa Senhora do Cabo, 939, 2750-374 Cascais, Portugal
| | - Rui Rosa
- MARE - Centro de Ciências do Mar e do Ambiente, Laboratório Marítimo da Guia, Faculdade de Ciências da Universidade de Lisboa, Av. Nossa Senhora do Cabo, 939, 2750-374 Cascais, Portugal
| | - Patrícia G Cardoso
- MARE - Centro de Ciencias do Mar e do Ambiente, Universidade de Coimbra, 3004-517 Coimbra, Portugal
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14
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White L, Donohue I, Emmerson MC, O'Connor NE. Combined effects of warming and nutrients on marine communities are moderated by predators and vary across functional groups. GLOBAL CHANGE BIOLOGY 2018; 24:5853-5866. [PMID: 30246490 DOI: 10.1111/gcb.14456] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 08/08/2018] [Accepted: 09/07/2018] [Indexed: 06/08/2023]
Abstract
Warming, nutrient enrichment and biodiversity modification are among the most pervasive components of human-induced global environmental change. We know little about their cumulative effects on ecosystems; however, even though this knowledge is fundamental to predicting and managing their consequences in a changing world. Here, we show that shifts in predator species composition can moderate both the individual and combined effects of warming and nutrient enrichment in marine systems. However, all three aspects of global change also acted independently to alter different functional groups in our flow-through marine rock-pool mesocosms. Specifically, warming reduced macroalgal biomass and assemblage productivity, whereas enrichment led to increased abundance of meso-invertebrate consumers, and loss of predator species led to increased gastropod grazer biomass. This disparity in responses, both across trophic levels (macroalgae and intermediate consumers), and between detecting additive effects on aggregate measures of ecosystem functioning, yet interactive effects on community composition, illustrates that our forecasting ability depends strongly on the level of ecological complexity incorporated within global change experiments. We conclude that biodiversity change-and loss of predator species in particular-plays a critical and overarching role in determining how ecological communities respond to stressors.
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Affiliation(s)
- Lydia White
- School of Biological Sciences, Queen's University Belfast, Belfast, UK
| | - Ian Donohue
- Department of Zoology, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Mark C Emmerson
- School of Biological Sciences, Queen's University Belfast, Belfast, UK
| | - Nessa E O'Connor
- School of Biological Sciences, Queen's University Belfast, Belfast, UK
- Department of Zoology, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
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15
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Liu C, Zou D, Yang Y. Comparative physiological behaviors of Ulva lactuca and Gracilariopsis lemaneiformis in responses to elevated atmospheric CO 2 and temperature. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:27493-27502. [PMID: 30047019 DOI: 10.1007/s11356-018-2792-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 07/18/2018] [Indexed: 06/08/2023]
Abstract
Physiological metabolisms of seaweeds usually suffered climate changes in the field. Gracilariopsis lemaneiformis and Ulva lactuca, collected from Nan'ao Island, Shantou, China, were cultured under ambient and elevated CO2 supply (390 and 800 μl L-1), with low and high temperatures (15 °C and 25 °C) for 2 weeks, aiming to compare the difference of the main physiological metabolism between two seaweed species in response to the elevated CO2 and high temperature. At 15 °C, the pH reduction in the culture medium caused by elevated CO2 was larger in G. lemaneiformis than in U. lactuca. At 25 °C, elevated CO2 significantly increased photosynthetic rates (Pn or Pg) and maintained constant respiratory rates (Rd) in G. lemaneiformis. However, for 25 °C-grown U. lactuca, the increment of CO2 did not enhance the Pn (Pg) rates but rapidly decreased the Rd rates itself. With the higher Rd/Pg ratios in G. lemaneiformis than U. lactuca, the warming thereby promoted more allocation of photosynthetic products to respiratory consumption in G. lemaneiformis. Both Pg and Rd rates exhibited lower temperature acclimation in two seaweeds. In addition, elevated CO2 markedly increased the relative growth rate (RGR) and phycobiliprotein (PB) contents at 25 °C, but exhibited no enhancement of chlorophyll a (Chl a), carotenoids (Car), soluble carbohydrate (SC), and soluble protein (SP) contents in G. lemaneiformis, with the reduction of SC when temperature increased only. We suggested that climate changes were probably a more benefit to U. lactuca than to G. lemaneiformis, inherently justifying the metabolism during G. lemaneiformis maricultivation.
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Affiliation(s)
- Chunxiang Liu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
- College of life Sciences, Huaibei Normal University, Huaibei, 235000, China
| | - Dinghui Zou
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou, 510006, China.
| | - Yufeng Yang
- Institute of Hydrobiology, Jinan University, Guangzhou, 510000, China
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16
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Cardoso PG, Loganimoce EM, Neuparth T, Rocha MJ, Rocha E, Arenas F. Interactive effects of increased temperature, pCO 2 and the synthetic progestin levonorgestrel on the fitness and breeding of the amphipod Gammarus locusta. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 236:937-947. [PMID: 29102173 DOI: 10.1016/j.envpol.2017.10.065] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 10/07/2017] [Accepted: 10/15/2017] [Indexed: 06/07/2023]
Abstract
Given the lack of knowledge regarding climate change-chemical exposure interactions, it is vital to evaluate how these two drivers jointly impact aquatic species. Thus, for the first time, we aimed at investigating the combined effects of increased temperature, pCO2 and the synthetic progestin levonorgestrel on survival, growth, consumption rate and reproduction of the amphipod Gammarus locusta. For that, a full factorial design manipulating temperature [ambient temperature and warming (+4 °C)], pCO2 [normocapnia and hypercapnia (Δ pH 0.5 units)] and the progestin levonorgestrel (LNG: L1 - 10 ngLL-1 and L2 - 1000 ngLL-1, control - no progestin and solvent control - vehicle ethanol (0.01%)) was implemented for 21 days. G. locusta was strongly negatively affected by warming, experiencing higher mortality rates (50-80%) than in any other treatments. Instead, growth rates were significantly affected by interactions of LNG with temperature and pCO2. It was observed, in the short-term (7d) that under ambient temperature (18 °C) and hypercapnic conditions (pH 7.6), the LNG presence promoted the amphipod's growth, while in the medium-term (21d) this response was not observed. Relative consumption rates (RCRs), during the first week were higher than in the third week. Furthermore, in the first week, RCRs were negatively affected by higher temperature while in the third week, RCRs were negatively affected by acidification. Furthermore, it was observed a negative effect of higher temperature and acidification on G. locusta fecundity, contrarily to LNG. Concluding, the impact of increased temperature and pCO2 was clearly more adverse for the species than exposure to the synthetic progestin, however, some interactions between the progestin and the climate factors were observed. Thus, in a future scenario of global change, the presence of LNG (and other progestins alike) may modulate to a certain level the effects of climate drivers (and vice-versa) on the gammarids fitness and reproduction.
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Affiliation(s)
- P G Cardoso
- Group of Histomorphology, Physiopathology and Applied Toxicology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal.
| | - E M Loganimoce
- Group of Histomorphology, Physiopathology and Applied Toxicology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - T Neuparth
- Group of Endocrine Disruptors and Emergent Contaminants, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
| | - M J Rocha
- Group of Histomorphology, Physiopathology and Applied Toxicology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal; Laboratory of Histology and Embryology, Department of Microscopy, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - E Rocha
- Group of Histomorphology, Physiopathology and Applied Toxicology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal; Laboratory of Histology and Embryology, Department of Microscopy, Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - F Arenas
- Group of Aquatic Ecology and Evolution, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Porto, Portugal
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17
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Legrand E, Riera P, Bohner O, Coudret J, Schlicklin F, Derrien M, Martin S. Impact of ocean acidification and warming on the productivity of a rock pool community. MARINE ENVIRONMENTAL RESEARCH 2018; 136:78-88. [PMID: 29472033 DOI: 10.1016/j.marenvres.2018.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 02/05/2018] [Accepted: 02/11/2018] [Indexed: 06/08/2023]
Abstract
This study examined experimentally the combined effect of ocean acidification and warming on the productivity of rock pool multi-specific assemblages, composed of coralline algae, fleshy algae, and grazers. Natural rock pool communities experience high environmental fluctuations. This may confer physiological advantage to rock pool communities when facing predicted acidification and warming. The effect of ocean acidification and warming have been assessed at both individual and assemblage level to examine the importance of species interactions in the response of assemblages. We hypothesized that rock pool assemblages have physiological advantage when facing predicted ocean acidification and warming. Species exhibited species-specific responses to increased temperature and pCO2. Increased temperature and pCO2 have no effect on assemblage photosynthesis, which was mostly influenced by fleshy algal primary production. The response of coralline algae to ocean acidification and warming depended on the season, which evidenced the importance of physiological adaptations to their environment in their response to climate change. We suggest that rock pool assemblages are relatively robust to changes in temperature and pCO2, in terms of primary production.
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Affiliation(s)
- Erwann Legrand
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France.
| | - Pascal Riera
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Olivier Bohner
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Jérôme Coudret
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Ferdinand Schlicklin
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Marie Derrien
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Sophie Martin
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
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18
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Sampaio E, Lopes AR, Francisco S, Paula JR, Pimentel M, Maulvault AL, Repolho T, Grilo TF, Pousão-Ferreira P, Marques A, Rosa R. Ocean acidification dampens physiological stress response to warming and contamination in a commercially-important fish (Argyrosomus regius). THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 618:388-398. [PMID: 29132006 DOI: 10.1016/j.scitotenv.2017.11.059] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 11/05/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
Increases in carbon dioxide (CO2) and other greenhouse gases emissions are changing ocean temperature and carbonate chemistry (warming and acidification, respectively). Moreover, the simultaneous occurrence of highly toxic and persistent contaminants, such as methylmercury, will play a key role in further shaping the ecophysiology of marine organisms. Despite recent studies reporting mostly additive interactions between contaminant and climate change effects, the consequences of multi-stressor exposure are still largely unknown. Here we disentangled how Argyrosomus regius physiology will be affected by future stressors, by analysing organ-dependent mercury (Hg) accumulation (gills, liver and muscle) within isolated/combined warming (ΔT=4°C) and acidification (ΔpCO2=1100μatm) scenarios, as well as direct deleterious effects and phenotypic stress response over multi-stressor contexts. After 30days of exposure, although no mortalities were observed in any treatments, Hg concentration was enhanced under warming conditions, especially in the liver. On the other hand, elevated CO2 decreased Hg accumulation and consistently elicited a dampening effect on warming and contamination-elicited oxidative stress (catalase, superoxide dismutase and glutathione-S-transferase activities) and heat shock responses. Thus, potentially unpinned on CO2-promoted protein removal and ionic equilibrium between hydrogen and reactive oxygen species, we found that co-occurring acidification decreased heavy metal accumulation and contributed to physiological homeostasis. Although this indicates that fish can be physiologically capable of withstanding future ocean conditions, additional experiments are needed to fully understand the biochemical repercussions of interactive stressors (additive, synergistic or antagonistic).
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Affiliation(s)
- Eduardo Sampaio
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal.
| | - Ana R Lopes
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal; UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Caparica, Portugal
| | - Sofia Francisco
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal
| | - Jose R Paula
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal
| | - Marta Pimentel
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal
| | - Ana L Maulvault
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal; Divisão de Aquacultura e Valorização (DivAV), Instituto Português do Mar e da Atmosfera (IPMA, I.P.), Av. Brasília, 1449-006 Lisboa, Portugal; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Rua das Bragas, 289, 4050-123 Porto, Portugal
| | - Tiago Repolho
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal
| | - Tiago F Grilo
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal
| | - Pedro Pousão-Ferreira
- Divisão de Aquacultura e Valorização (DivAV), Instituto Português do Mar e da Atmosfera (IPMA, I.P.), Av. Brasília, 1449-006 Lisboa, Portugal
| | - António Marques
- Divisão de Aquacultura e Valorização (DivAV), Instituto Português do Mar e da Atmosfera (IPMA, I.P.), Av. Brasília, 1449-006 Lisboa, Portugal; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Rua das Bragas, 289, 4050-123 Porto, Portugal
| | - Rui Rosa
- MARE - Marine Environmental Sciences Centre & Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal
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