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Almeida RA, Fajgenblat M, Lemmens P, De Meester L. Pesticide exposure enhances dominance patterns in a zooplankton community. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2023; 33:e2900. [PMID: 37335538 DOI: 10.1002/eap.2900] [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: 11/14/2022] [Revised: 05/04/2023] [Accepted: 06/06/2023] [Indexed: 06/21/2023]
Abstract
Exposure to pesticides can profoundly alter community dynamics. It is expected that dominance patterns will be enhanced or reduced depending on whether the dominant species is less or more sensitive to the pesticide than the subdominant species. Community dynamics are, however, also determined by processes linked to population growth as well as competition at carrying capacity. Here, we used a mesocosm experiment to quantify the effect of chlorpyrifos exposure on the population dynamics of four cladoceran species (Daphnia magna, Daphnia pulicaria, Daphnia galeata and Scapholeberis mucronata) in mixed cultures, testing for direct effects of chlorpyrifos and indirect effects mediated by interactions with other species on the timing of population growth and dominance at carrying capacity. We also quantified whether the pesticide-induced changes in community dynamics affected top-down control of phytoplankton. By adding a treatment in which we used different genotype combinations of each species, we also tested to what extent genetic composition affects community responses to pesticide exposure. Immobilization tests showed that D. magna is the least sensitive to chlorpyrifos of the tested species. Chlorpyrifos exposure first leads to a reduction in the abundance of D. galeata to the benefit of D. pulicaria, and subsequently to a reduction in densities of D. pulicaria to the benefit of D. magna. This resulted in D. magna being more dominant in the pesticide than in the control treatment by the end of the experiment. There was no effect of genotypic differences on community patterns, and top-down control of phytoplankton was high in all treatments. Our results suggest that in this community dominance patterns are enhanced in line with the observed among-species differences in sensitivity to the pesticide. Our results also show that the development of the community in pesticide treatment is a complex interaction between direct and indirect effects of the pesticide.
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Affiliation(s)
- Rafaela A Almeida
- Laboratory of Aquatic Ecology, Evolution and Conservation, KU Leuven, Leuven, Belgium
| | - Maxime Fajgenblat
- Laboratory of Aquatic Ecology, Evolution and Conservation, KU Leuven, Leuven, Belgium
- Data Science Institute (DSI), Interuniversity Institute for Biostatistics and statistical Bioinformatics (I-BioStat), Hasselt University, Hasselt, Belgium
| | - Pieter Lemmens
- Laboratory of Aquatic Ecology, Evolution and Conservation, KU Leuven, Leuven, Belgium
- Leibniz Institute für Gewasserökologie und Binnenfischerei (IGB), Berlin, Germany
| | - Luc De Meester
- Laboratory of Aquatic Ecology, Evolution and Conservation, KU Leuven, Leuven, Belgium
- Leibniz Institute für Gewasserökologie und Binnenfischerei (IGB), Berlin, Germany
- Institute of Biology, Freie Universität Berlin, Berlin, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, Germany
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Yousey AM, Chowdhury PR, Biddinger N, Shaw JH, Jeyasingh PD, Weider LJ. Resurrected 'ancient' Daphnia genotypes show reduced thermal stress tolerance compared to modern descendants. ROYAL SOCIETY OPEN SCIENCE 2018; 5:172193. [PMID: 29657812 PMCID: PMC5882736 DOI: 10.1098/rsos.172193] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 02/16/2018] [Indexed: 05/25/2023]
Abstract
Understanding how populations adapt to rising temperatures has been a challenge in ecology. Research often evaluates multiple populations to test whether local adaptation to temperature regimes is occurring. Space-for-time substitutions are common, as temporal constraints limit our ability to observe evolutionary responses. We employed a resurrection ecology approach to understand how thermal tolerance has changed in a Daphnia pulicaria population over time. Temperatures experienced by the oldest genotypes were considerably lower than the youngest. We hypothesized clones were adapted to the thermal regimes of their respective time periods. We performed two thermal shock experiments that varied in length of heat exposure. Overall trends revealed that younger genotypes exhibited higher thermal tolerance than older genotypes; heat shock protein (hsp70) expression increased with temperature and varied among genotypes, but not across time periods. Our results indicate temperature may have been a selective factor on this population, although the observed responses may be a function of multifarious selection. Prior work found striking changes in population genetic structure, and in other traits that were strongly correlated with anthropogenic changes. Resurrection ecology approaches should help our understanding of interactive effects of anthropogenic alterations to temperature and other stressors on the evolutionary fate of natural populations.
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Affiliation(s)
- Aime'e M. Yousey
- Department of Biology, University of Oklahoma, 730 Van Vleet Oval, Norman, OK 73019, USA
| | - Priyanka Roy Chowdhury
- Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, Stillwater, OK 74078, USA
| | - Nicole Biddinger
- Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, Stillwater, OK 74078, USA
| | - Jennifer H. Shaw
- Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, Stillwater, OK 74078, USA
| | - Punidan D. Jeyasingh
- Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, Stillwater, OK 74078, USA
| | - Lawrence J. Weider
- Department of Biology, University of Oklahoma, 730 Van Vleet Oval, Norman, OK 73019, USA
- Program in Ecology and Evolutionary Biology, University of Oklahoma, 730 Van Vleet Oval, Norman, OK 73019, USA
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Li H, Yuan S, Su G, Li M, Wang Q, Zhu G, Letcher RJ, Li Y, Han Z, Liu C. Whole-Life-Stage Characterization in the Basic Biology of Daphnia magna and Effects of TDCIPP on Growth, Reproduction, Survival, and Transcription of Genes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:13967-13975. [PMID: 29115819 DOI: 10.1021/acs.est.7b04569] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Toxicity tests of chemicals have mainly focused on the partial life-cycle evaluation of model animals. Limited information is available for the evaluation of effects of chemicals from a whole-life-stage exposure perspective. The objective of this study was to perform a whole-life-stage characterization in the basic biology of Daphnia magna (D. magna) and evaluate the effects of a known organophosphate ester (OPE) contaminant, tris(1,3-dichloro-2-propyl) phosphate (TDCIPP), on growth, reproduction, survival, and transcription of genes. The whole-life-stage characterization in growth, reproduction, and survival of D. magna was conducted, and representative sampling time points for the three developmental stages were identified (day 6, day 32, and day 62). Transcriptomic profiles for these three stages were compared, and stage-specific PCR arrays of D. magna were developed. The whole-life-stage exposure to environmentally relevant or greater concentrations of TDCIPP significantly inhibited growth and reproduction of D. magna and decreased survival at the later stage of the exposure experiment (≥32 days). Such adverse effects were not observed in the early stage of the exposure (<32 days), suggesting that short-term toxicity tests, such as the standard 21-day test, might underestimate the environmental risk of TDCIPP. Furthermore, expressions of genes selected at day 6, day 32, and day 62 were significantly changed after TDCIPP exposure, and the changes in the expressions of partial genes were correlated to the inhibitory effects on growth, reproduction, and survival.
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Affiliation(s)
- Han Li
- College of Fisheries, Huazhong Agricultural University , Wuhan 430070, China
| | - Siliang Yuan
- College of Fisheries, Huazhong Agricultural University , Wuhan 430070, China
- Hubei Engineering Technology Research Center for Aquatic Animal Diseases Control and Prevention, Wuhan 430070, China
| | - Guanyong Su
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, China
| | - Meng Li
- Institute of Pesticide and Environmental Toxicology, Zhejiang University , Hangzhou 310058, China
| | - Qiangwei Wang
- Institute of Pesticide and Environmental Toxicology, Zhejiang University , Hangzhou 310058, China
| | - Guonian Zhu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University , Hangzhou 310058, China
| | - Robert J Letcher
- Departments of Chemistry and Biology, Carleton University , Ottawa, Ontario K1S 5B6, Canada
| | - Yufei Li
- China Rural Technology Development Centre, Ministry of Science and Technology of PR China , Beijing 100045, China
| | - Zhihua Han
- Nanjing Institute of Environmental Science, MEP, Nanjing 210042, Jiangsu, China
| | - Chunsheng Liu
- College of Fisheries, Huazhong Agricultural University , Wuhan 430070, China
- Collaborative Innovation Centre for Efficient and Health Production of Fisheries in Hunan Province, Changde 415000, China
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Simpson AM, Jeyasingh PD, Belden JB. Assessment of biochemical mechanisms of tolerance to chlorpyrifos in ancient and contemporary Daphnia pulicaria genotypes. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 193:122-127. [PMID: 29059598 DOI: 10.1016/j.aquatox.2017.10.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/14/2017] [Accepted: 10/16/2017] [Indexed: 06/07/2023]
Abstract
The evolution of tolerance to environmental contaminants in non-target taxa has been largely studied by comparing extant populations experiencing contrasting exposure. Previous research has demonstrated that "resurrected" genotypes from a population of Daphnia pulicaria express temporal variation in sensitivity to the insecticide chlorpyrifos. Ancient genotypes (1301-1646AD.) were on average more sensitive to this chemical compared to the contemporary genotypes (1967-1977AD.). To determine the physiological mechanisms of tolerance, a series of biochemical assays was performed on three ancient and three contemporary genotypes; these six genotypes exhibited the most sensitive and most tolerant phenotypes within the population, respectively. Metabolic tolerance mechanisms were evaluated using acute toxicity testing, while target-site tolerance was assessed via in vitro acetylcholinesterase (AChE) assays. Acute toxicity tests were conducted using i) the toxic metabolite chlorpyrifos-oxon (CPF-oxon) and ii) CPF-oxon co-applied with piperonyl butoxide (PBO), a known Phase-I metabolic inhibitor. Both series of toxicity tests reduced the mean variation in sensitivity between tolerant and sensitive genotypes. Exposure to CPF-O reduced the disparity from a 4.7-fold to 1.6-fold difference in sensitivity. The addition of PBO further reduced the variation to a 1.2-fold difference in sensitivity. In vitro acetylcholinesterase assays yielded no significant differences in constitutive activity or target-site sensitivity. These findings suggest that pathways involving Phase-I detoxification and/or bioactivation of chlorpyrifos play a significant role in dictating the microevolutionary trajectories of tolerance in this population.
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Affiliation(s)
- Adam M Simpson
- Oklahoma State University, Stillwater, OK 74078, United States; Penn State Erie, The Behrend College, Erie, PA 16563, United States.
| | | | - Jason B Belden
- Oklahoma State University, Stillwater, OK 74078, United States
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Korosi JB, Thienpont JR, Smol JP, Blais JM. Paleo-ecotoxicology: What Can Lake Sediments Tell Us about Ecosystem Responses to Environmental Pollutants? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:9446-9457. [PMID: 28763202 DOI: 10.1021/acs.est.7b02375] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The development of effective risk reduction strategies for aquatic pollutants requires a comprehensive understanding of toxic impacts on ecosystems. Classical toxicological studies are effective for characterizing pollutant impacts on biota in a controlled, simplified environment. Nonetheless, it is well-acknowledged that predictions based on the results of these studies must be tested over the long-term in a natural ecosystem setting to account for increased complexity and multiple stressors. Paleolimnology (the study of lake sediment cores to reconstruct environmental change) can address many key knowledge gaps. When used as part of a weight-of-evidence framework with more traditional approaches in ecotoxicology, it can facilitate rapid advances in our understanding of the chronic effects of pollutants on ecosystems in an environmentally realistic, multistressor context. Paleolimnology played a central role in the Acid Rain debates, as it was instrumental in demonstrating industrial emissions caused acidification of lakes and associated ecosystem-wide impacts. "Resurrection Ecology" (hatching dormant resting eggs deposited in the past) records evolutionary responses of populations to chronic pollutant exposure. With recent technological advances (e.g., geochemistry, genomic approaches), combined with an emerging paleo-ecotoxicological framework that leverages strengths across multiple disciplines, paleolimnology will continue to provide valuable insights into the most pressing questions in ecotoxicology.
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Affiliation(s)
- Jennifer B Korosi
- Department of Geography, York University , Toronto, Ontario Canada , M3J 1P3
| | - Joshua R Thienpont
- Department of Biology, University of Ottawa , Ottawa, Ontario Canada , K1N 6N5
| | - John P Smol
- Paleoecological Environmental Assessment and Research Lab (PEARL), Department of Biology, Queen's University , Kingston, Ontario Canada , K7L 3N6
| | - Jules M Blais
- Department of Biology, University of Ottawa , Ottawa, Ontario Canada , K1N 6N5
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Simpson AM, Jeyasingh PD, Belden JB. Resurrection ecology and its utility in ecotoxicology. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2017; 13:790-792. [PMID: 28613033 DOI: 10.1002/ieam.1918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Daphnia magna transcriptome by RNA-Seq across 12 environmental stressors. Sci Data 2016; 3:160030. [PMID: 27164179 PMCID: PMC4862326 DOI: 10.1038/sdata.2016.30] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 04/19/2016] [Indexed: 11/08/2022] Open
Abstract
The full exploration of gene-environment interactions requires model organisms with well-characterized ecological interactions in their natural environment, manipulability in the laboratory and genomic tools. The waterflea Daphnia magna is an established ecological and toxicological model species, central to the food webs of freshwater lentic habitats and sentinel for water quality. Its tractability and cyclic parthenogenetic life-cycle are ideal to investigate links between genes and the environment. Capitalizing on this unique model system, the STRESSFLEA consortium generated a comprehensive RNA-Seq data set by exposing two inbred genotypes of D. magna and a recombinant cross of these genotypes to a range of environmental perturbations. Gene models were constructed from the transcriptome data and mapped onto the draft genome of D. magna using EvidentialGene. The transcriptome data generated here, together with the available draft genome sequence of D. magna and a high-density genetic map will be a key asset for future investigations in environmental genomics.
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