Modelling and in situ caging for a realistic extrapolation of ecotoxicological effects at the population level: a methodological approach with Gammarus fossarum (Crustacean) and Potamopyrgus antipodarum (Gastropod) - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Papers Year : 2010

Modelling and in situ caging for a realistic extrapolation of ecotoxicological effects at the population level: a methodological approach with Gammarus fossarum (Crustacean) and Potamopyrgus antipodarum (Gastropod)

Modélisation et encagement in situ pour l'extrapolation des effets écotoxicologique au niveau populationnel : approche méthodologique chez Gammarus fossarum et Potamopyrgus antipodarum

Abstract

Population models are now recognized as useful tools to solve the issue of extrapolating toxicological effects measured at the organism level to potential impacts on populations. Nevertheless, the environmental realism of models employed in predictive approaches could be improved in order to yield a more pertinent risk assessment taking into account variability in population vulnerability and applicable with native species. Morevover, this could allow transferring the population extrapolation approach to the diagnostic framework. This work considers two phylogenetically and ecologically contrasted species (the Crustacean Amphipod Gammarus and the Mollusk Gastropod Potamopyrgus), widely present in European rivers and for which ecotoxicological (sub)individual biomarkers are available. First, we present how we developed environmentally realistic population models by using in situ caging methodologies. These Leslie models, which consider size-structured populations, link mechanistically individual-level demographic parameters (survival, growth, reproductive activity, fecundity, size at maturity) and the dynamics of reference native populations all along a year. Second, we illustrate with the case study of a wastewater treatment plant impact, how our modelling methodology coupled with in situ water quality biotests can propose population level assessment of water quality, and how the mechanistic analysis of population indicators sensibility could help to improve assessment of potential contamination impacts on ecologically relevant biological levels.
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hal-02593331 , version 1 (15-05-2020)

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Romain Coulaud, O. Adam, Olivier Geffard, H. Quéau, Jeanne Garric, et al.. Modelling and in situ caging for a realistic extrapolation of ecotoxicological effects at the population level: a methodological approach with Gammarus fossarum (Crustacean) and Potamopyrgus antipodarum (Gastropod). 20th SETAC annual meeting, May 2010, Seville, Spain. pp.24. ⟨hal-02593331⟩
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