Ecological risk assessment of PCBs and other organic contaminant residues in Laguna de Terminos, Mexico
Ecological risk assessment of PCBs and other organic contaminant residues in Laguna de Terminos, Mexico
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DOI：
10.1007/s10646-008-0295-9
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发表时间：
2009-01
期刊：
影响因子：
2.7
通讯作者：
F. Carvalho;J. Villeneuve;C. Cattini;J. Rendón;J. Oliveira
中科院分区：
文献类型：
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作者：
F. Carvalho;J. Villeneuve;C. Cattini;J. Rendón;J. Oliveira
拉古纳德Terminos，一个广泛的沿海泻湖系统在坎佩切，墨西哥，调查的污染多氯联苯（PCBs）。这些工业化学污染物的分布沿着与农药残留在泻湖，以及它们的沉积物-水的分区和生物积累的牡蛎和鱼类进行了评估。泻湖中的污染物浓度与水生生物的毒性数据进行了比较，并讨论了生态毒理学风险。目前的污染物浓度一般比最敏感的水生物种的急性毒性水平低几个数量级，这似乎与针对拉古纳德Terminos的自然保护区的地位和功能是一致的。特别是，Penaeidaeshrimp物种是坎佩切最宝贵的渔业资源，在拉古纳有重要的种群，目前这些污染物的水平很低，没有受到损害。然而，由于已知的环境持久性，建议对泻湖生态系统中的氯化污染物水平进行监测。
Laguna de Terminos, a wide coastal lagoon system in Campeche, Mexico, was investigated for the contamination by polychlorobiphenyls (PCBs). Distribution of these industrial chemical contaminants along with pesticide residues in the lagoon, as well as their sediment–water partitioning and bioaccumulation by oysters and fish were assessed. Contaminant concentrations in the lagoon were compared with toxicity data for aquatic organisms and the ecotoxicological risks discussed. Current contaminant concentrations generally were several orders of magnitude below acute toxic levels for the most sensitive aquatic species and this seems compatible with the status of nature reserve and functions aimed at Laguna de Terminos. In particular,Penaeidaeshrimp species that are the most valuable fisheries resources of Campeche with important populations in the Laguna are not impaired with the current low levels of these contaminants. Nevertheless, due to known environmental persistence, the surveillance of chlorinated contaminant levels in the lagoon ecosystems is recommended.