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From biomarkers to population responses in Nereis diversicolor: assessment of stress in estuarine ecosystems.
- Source :
-
Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2007 Mar; Vol. 66 (3), pp. 402-11. Date of Electronic Publication: 2006 Apr 18. - Publication Year :
- 2007
-
Abstract
- Suborganismal responses to toxicants can be sensitive tools to assess marine pollution, but their ecological significance is a matter of debate. Among these biomarkers, those linked to reproduction are most probably related to populational effects. To test this hypothesis, Nereis diversicolor were collected in the multipolluted Seine estuary and the comparatively clean Authie estuary (France). Energy reserves were higher in Authie worms, suggesting a better physiological status. The number of oocytes per female was higher for the polychaetes from the Authie, but it was related to the size of animals, which was higher at this site. Densities of worms were depleted in the Seine compared to those in Authie. Demographic structure of the Seine population was also altered. The concomitant changes in energy reserves, egg production, and population structure and density suggest that the effects on biomarkers and at the population level are related.
Details
- Language :
- English
- ISSN :
- 1090-2414
- Volume :
- 66
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Ecotoxicology and environmental safety
- Publication Type :
- Academic Journal
- Accession number :
- 16620980
- Full Text :
- https://doi.org/10.1016/j.ecoenv.2006.02.016