Ecotoxicology and spatial modeling in population dynamics: An illustration with brown trout
Identifieur interne : 000203 ( Main/Exploration ); précédent : 000202; suivant : 000204Ecotoxicology and spatial modeling in population dynamics: An illustration with brown trout
Auteurs : Arnaud Chaumot [France] ; Sandrine Charles [France] ; Patrick Flammarion [France] ; Pierre Auger [France]Source :
- Environmental Toxicology and Chemistry [ 0730-7268 ] ; 2003-05.
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Abstract
We developed a multiregion matrix population model to explore how the demography of a hypothetical brown trout population living in a river network varies in response to different spatial scenarios of cadmium contamination. Age structure, spatial distribution, and demographic and migration processes are taken into account in the model. Chronic or acute cadmium concentrations affect the demographic parameters at the scale of the river range. The outputs of the model constitute population‐level end points (the asymptotic population growth rate, the stable age structure, and the asymptotic spatial distribution) that allow comparing the different spatial scenarios of contamination regarding the demographic response at the scale of the whole river network. An analysis of the sensitivity of these end points to lower order parameters enables us to link the local effects of cadmium to the global demographic behavior of the brown trout population. Such a link is of broad interest in the point of view of ecotoxicological management.
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DOI: 10.1002/etc.5620220502
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type="abstract" xml:lang="en">We developed a multiregion matrix population model to explore how the demography of a hypothetical brown trout population living in a river network varies in response to different spatial scenarios of cadmium contamination. Age structure, spatial distribution, and demographic and migration processes are taken into account in the model. Chronic or acute cadmium concentrations affect the demographic parameters at the scale of the river range. The outputs of the model constitute population‐level end points (the asymptotic population growth rate, the stable age structure, and the asymptotic spatial distribution) that allow comparing the different spatial scenarios of contamination regarding the demographic response at the scale of the whole river network. An analysis of the sensitivity of these end points to lower order parameters enables us to link the local effects of cadmium to the global demographic behavior of the brown trout population. 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