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Journal articles
In situ reproductive bioassay with caged Gammarus fossarum (Crustacea): Part 2 – evaluating the relevance of using a molt cycle temperature‐dependent model as reference to assess toxicity in freshwater monitoring
Abstract : Active biomonitoring approaches are now recognized as relevant for monitoring water contamination and toxicity. Nevertheless, due to the confounding influence of variable and uncontrolled environmental conditions such as temperature, biological markers measured on transplanted individuals to assess water quality are difficult to interpret. The purpose of this study aims is to propose a methodology for adapting a laboratory test of chronic sub‐lethal toxicity based on the molting cycle of Gammarus fossarum to in situ assays. To this end, we (1) adapted the molt cycle temperature‐dependent model developed in Part 1 to the fluctuating temperatures measured in the field; (2) assessed the predictive power of our approach as “reference value” from gammarids caged in nine non‐impacted sites at different seasons; and (3) tested the relevance of our tool to interpret in situ reproductive bioassays from five upstream/downstream studies and a large‐scale deployment in twelve sites. Our approach based on modeling the progress of gammarid molting cycle as a function of temperature appeared as a relevant and robust tool for interpreting in situ observations in different environmental contexts in time and space. By avoiding using a “reference” or upstream situation as a baseline from which water quality could be assessed, this approach provides a real added value to water quality diagnosis in biomonitoring programs.
https://hal-normandie-univ.archives-ouvertes.fr/hal-02425965
Contributor : Benoit Xuereb <>
Submitted on : Tuesday, December 31, 2019 - 6:46:38 PM
Last modification on : Wednesday, October 14, 2020 - 4:10:18 AM
Contributor : Benoit Xuereb <>
Submitted on : Tuesday, December 31, 2019 - 6:46:38 PM
Last modification on : Wednesday, October 14, 2020 - 4:10:18 AM
