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Title: | Pesticide exposure enhances dominance patterns in a zooplankton community | Data Creator - person: | Almeida, Rafaela FAJGENBLAT, Maxime Lemmens, Pieter De Meester, Luc |
Data Creator - organization: | KU Leuven Leibniz Institute für Gewasserökologie und Binnenfischerei (IGB) Hasselt University Freie Universität Berlin Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), |
Data Curator - person: | Almeida, Rafaela | Data Curator - organization: | KU Leuven | Rights Holder - person: | Almeida, Rafaela | Rights Holder - organization: | KU Leuven | Publisher: | Dryad | Issue Date: | 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, D. pulicaria, D. galeata and Scapholeberis mucronata) in mixed cultures, testing for direct effects of chlorpyrifos and indirect effects mediated by interactions with other species on timing of population growth and dominance at carrying capacity. We also quantified whether the pesticide-induced changes in community dynamics affect 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 led 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 the pesticide treatment is a complex interaction between direct and indirect effects of the pesticide. | Research Discipline: | Natural sciences > Environmental sciences > Aquatic sciences, challenges and pollution > Aquatic sciences, challenges and pollution not elsewhere classified (01070199) | Keywords: | interspecific interactions;competition;Cladocera;chlorpyrifos;Ecosystem functioning;genetic variation;Mesocosms;FOS: Biological sciences;FOS: Biological sciences | DOI: | 10.5061/dryad.7pvmcvf00 | Link to publication/dataset: | https://datadryad.org/stash/dataset/doi:10.5061/dryad.7pvmcvf00 | Source: | Dryad. 10.5061/dryad.7pvmcvf00 https://datadryad.org/stash/dataset/doi:10.5061/dryad.7pvmcvf00 | Publications related to the dataset: | 10.1002/eap.2900 | License: | Creative Commons Zero v1.0 Universal (CC0-1.0) | Access Rights: | Open Access | Version: | 1.0 | Category: | DS | Type: | Dataset |
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