Skip to Main content Skip to Navigation
Theses

Modélisation et changements d'échelles pour l'évaluation écotoxicologique : application à deux macroinvertébrés aquatiques, Gammarus fossarum (crustacé amphipode) et potamopyrgus antipodarum (mollusque gastéropode)

Abstract : The regulatory framework lead to increase the assessments of the ecological risk linked to the dischaarge of chemical substances in aquatic environment with the aim to protect natural populations. However, this target level of protection cannot be used so easily to etablish a direcet link between a contamination and its effects. In order to overcome this difficulty, the multi-scale approaches based on the study of the effects of the contaminations on individual markers and then on the extrapolation of these effects at the population level with population dynamic models reprensent promising tools and start to bewell accepted in predictive processes. Yet, their use for the diagnosis of water quality remainsrare for the moment, on the one hand, because of the important varaibility of answers of individual makers in situ linked to the influence of diverse confounding environmental factors for the assessments of toxicity and, on the other hand, because pf the lack of environmental relevance of models currently proposed. Focused on the use of 2 species widely observed in European rivers and presenting contrastingecological and phylogenetic characteristics : the Grammar fossarum crutacean and the Potamopyrgus antipodarum mollusc, this doctoral degree first propose a methodology to consider the influenceof confounding factors in order to improve the reading of biological in situ tests based on the measurment of individual markers on caged organisms and second, to develop ecologically relevant population models. Thus, this work allowed to underline the importance of the consideration of confounding factors (i.e. temperature), in different in situ tests based on the measurment of individul markers on caged organisms. Moreover, population models for both species have been defined in order to test the influence of life histories and seasonal variations on demographic sensitivity of populations.
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-01127488
Contributor : Abes Star :  Contact
Submitted on : Saturday, March 7, 2015 - 2:54:52 AM
Last modification on : Monday, May 18, 2020 - 2:37:19 PM
Long-term archiving on: : Monday, June 8, 2015 - 3:11:09 PM

File

2012LYO10018.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01127488, version 1

Collections

Citation

Romain Coulaud. Modélisation et changements d'échelles pour l'évaluation écotoxicologique : application à deux macroinvertébrés aquatiques, Gammarus fossarum (crustacé amphipode) et potamopyrgus antipodarum (mollusque gastéropode). Biodiversité et Ecologie. Université Claude Bernard - Lyon I, 2012. Français. ⟨NNT : 2012LYO10018⟩. ⟨tel-01127488⟩

Share

Metrics

Record views

386

Files downloads

1520