Ecotoxicology and population dynamics: on the use of DEBtox models in a Leslie modelling approach - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Ecological Modelling Year : 2005

Ecotoxicology and population dynamics: on the use of DEBtox models in a Leslie modelling approach

Ecotoxicologie et dynamique de population : utilisation des modèles DEBtox dans une approche de modélisation Leslie

Abstract

Although the ecological risks of toxic chemicals are usually assessed on the basis of individual responses, such as survival, reproduction or growth, ecotoxicologists are now attempting to assess the impact of environmental pollution on the dynamics of naturally exposed populations. The main issue is how to infer the likely impact on the population of the toxic effects observed at the individual level. Dynamic energy budget in toxicology (DEBtox) is the most user-friendly software currently available to analyze the experimental data obtained in toxicity tests performed on individuals. Because toxic effects are diverse and because the sensitivity of individuals varies considerably depending on life-cycle stage, Leslie models offer a convenient way of predicting toxicant effects on population dynamics. In the present study, we first show how parameter inputs, estimated from individual data using DEBtox, can be coupled using a Leslie matrix population model. Then, using experimental data obtained With Chironomus riparius, we show how the effects of a pesticide (methiocarb) on the population growth rate of a laboratory population can be estimated. Lastly, we perform a complex sensitivity analysis to pinpoint critical age classes within the population for the purposes of the field management of populations.
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Dates and versions

hal-02587157 , version 1 (15-05-2020)

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C. Lopes, A. Pery, Arnaud Chaumot, S. Charles. Ecotoxicology and population dynamics: on the use of DEBtox models in a Leslie modelling approach. Ecological Modelling, 2005, 188, pp.30-40. ⟨hal-02587157⟩
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