Développement d'une tolérance au cadmium et de coûts associés au sein d'une population de Gammarus fossarum présente dans une rivière faiblement contaminée
| Autor: | Marina Coquery, Hervé Quéau, Adeline François, Arnaud Chaumot, Olivier Geffard, Amandine Vigneron |
|---|---|
| Přispěvatelé: | Milieux aquatiques, écologie et pollutions (UR MALY), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Health
Toxicology and Mutagenesis Population chemistry.chemical_element COST OF TOLERANCE Management Monitoring Policy and Law Biology Toxicology Acclimatization Rivers Gammarus ACCLIMATION Biomonitoring Ecotoxicology Animals Amphipoda 14. Life underwater education Water pollution ADAPTATION GAMMARIDS education.field_of_study Cadmium General Medicine Drug Tolerance EVOLUTIONARY ECOTOXICOLOGY biology.organism_classification chemistry 13. Climate action Environmental chemistry [SDE]Environmental Sciences Water quality France METALS Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Ecotoxicology Ecotoxicology, Springer Verlag, 2015, 24 (6), pp.1239-1249. ⟨10.1007/s10646-015-1491-z⟩ |
| ISSN: | 0963-9292 1573-3017 |
| DOI: | 10.1007/s10646-015-1491-z⟩ |
| Popis: | International audience; Deciphering evolutionary processes occurring within long-term contaminated wild populations is essential for the ecological risk assessment of persistent chemical contaminations. Using field populations of Gammarus, a commonly-used genus in aquatic ecotoxicology, the present study sought to gain insights into the extent to which long-term exposure to metals in the field could effectively lead to shifts in toxicological sensitivities. For this, we identified a Gammarus population inhabiting a stream contaminated by cadmium (Cd). We compared the Cd-exposure and Cd-sensitivity of this population to those of five reference populations. Active biomonitoring determined in different years and seasons that significant levels of Cd were bioavailable in the contaminated site. Laboratory sensitivity tests under common garden conditions established that this long-term field exposure led to the development of a moderate Cd tolerance, which was maintained after a 3-week acclimatization in the laboratory, and transmitted to offspring produced under clean conditions. The potential physiological costs of tolerance were assessed by means of feeding rate measurements (in the laboratory and in situ). They revealed that, unlike for reference populations, the feeding activity of organisms from the tolerant population was greatly decreased when they were maintained under laboratory conditions, potentially indicating a high population vulnerability to environmental perturbations. Because dissolved Cd concentrations in water from the contaminated site were low (averaging 0.045 µg L-1) and below the current European environmental quality standard for Cd for inland surface waters (fixed at 0.08 µg L-1 in soft water environments), this case study sheds light onto the extent to which current environmental quality standards are protective against potential adverse outcomes of adaptive and micro-evolutionary processes occurring in contaminated environments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink