1. Organochlorine pollution in tropical rivers (Guadeloupe): role of ecological factors in food web bioaccumulation.
- Author
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Coat S, Monti D, Legendre P, Bouchon C, Massat F, and Lepoint G
- Subjects
- Animals, Biota, Chlordecone analysis, Chlordecone metabolism, Decapoda metabolism, Ecosystem, Environmental Monitoring, Fishes metabolism, Food Chain, Hexachlorocyclohexane analysis, Hexachlorocyclohexane metabolism, Hydrocarbons, Chlorinated metabolism, Mexico, Mollusca metabolism, Pesticides metabolism, Tropical Climate, Water Pollutants, Chemical metabolism, Water Pollution, Chemical statistics & numerical data, Aquatic Organisms metabolism, Hydrocarbons, Chlorinated analysis, Pesticides analysis, Rivers chemistry, Water Pollutants, Chemical analysis
- Abstract
Concentrations of organochlorine pesticides and stable isotope ratios of nitrogen and carbon were measured in a tropical freshwater ecosystem to evaluate the contamination level of biota and examine the bioaccumulation patterns of pollutants through the food web. Chemical analyses showed a general and heavy contamination of the entire food web. They revealed the strong accumulation of pollutants by juveniles of diadromous fishes and shrimps, as they re-enter the river. The role of ecological factors in the bioaccumulation of pesticides was evaluated. Whereas the most persistent pollutants (chlordecone and monohydro-chlordecone) were related to the organisms diet and habitat, bioaccumulation of β-HCH was only influenced by animal lipid content. The biomagnification potential of chlordecone through the food chain has been demonstrated. It highlighted the importance of trophic transfer in this compound bioaccumulation process. In contrast, bioconcentration by passive diffusion from water seemed to be the main exposure route of biota to β-HCH., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2011
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