کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4424161 | 1308869 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Interspecific variation in heavy metal body concentrations in biota of Sunderban mangrove wetland, northeast India Interspecific variation in heavy metal body concentrations in biota of Sunderban mangrove wetland, northeast India](/preview/png/4424161.png)
The coastal environment of West Bengal, recognized as the most diversified and productive ecosystem among all the maritime states of India, faces organic pollution from domestic sewage and urban and industrial effluents leading serious impacts on biota. The present paper aims at providing information on concentration level of heavy metals among the tissues of benthic polychaetes, bivalve molluscs and finfishes collected from Sundarban mangrove wetland, northeast coast of India. An overall common trend in bioaccumulation was revealed with the following decreasing order: Zn > Mn > Cu > Cr > Se > Hg with few exceptions. Both species dependent variability and temporal variations were pronounced. A high degree of organ specificity was evident in the bivalves where gill and mantle exhibited higher metal accumulation due to ion exchange property of the mucous layer covering these organs. Variability between closely related species is a reflection of different uptake rates, physiology and impact of environmental factors. The results of this analysis suggest that mollusks can play a significant role in trace metal trophic transfer studies, especially as their representatives are intertidally and subtidally ubiquitous.
Journal: Environment International - Volume 32, Issue 2, February 2006, Pages 203–207