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Trace metal dynamics in zooplankton from the Bay of Bengal during summer monsoon

DRS at CSIR-National Institute of Oceanography

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Title Trace metal dynamics in zooplankton from the Bay of Bengal during summer monsoon
 
Creator Rejomon, G.
DineshKumar, P.K.
Nair, M.
Muraleedharan, K.R.
 
Subject trace metals
pollution effects
pollution tolerance
zooplankton
 
Description Trace metal (Fe, Co, Ni, Cu, Zn, Cd, and Pb) concentrations in zooplankton from the mixed layer were investigated at 8 coastal and 20 offshore stations in the western Bay of Bengal during the summer monsoon of 2003. The ecotoxicological importance of trace metal uptake was apparent within the Bay of Bengal zooplankton. There was a distinct spatial heterogeneity of metals, with highest concentrations in the upwelling zones of the southeast coast, moderate concentrations in the cyclonic eddy of the northeast coast, and lowest concentrations in the open ocean warm gyre regions. The average trace metal concentrations (mu g g su(-1)) in coastal zooplankton (Fe, 44894.1 + or – 12198.2; Co, 46.2 + or – 4.6; Ni, 62.8 + or – 6.5; Cu, 84.9 + or – 6.7; Zn, 7546.8 + or – 1051.7; Cd, 46.2 + or – 5.6; Pb, 19.2 + or – 2.6) were higher than in offshore zooplankton (Fe, 3423.4 + or – 681.6; Co, 19.5 + or – 3.81; Ni, 25.3 + or – 7.3; Cu, 29.4 + or – 4.2; Zn, 502.3 + or – 124.3; Cd, 14.3 + or – 2.9; Pb, 3.2 + or – 2.0). A comparison of average trace metal concentrations in zooplankton from the Bay of Bengal showed enrichment of Fe, Co, Ni, Cu, Zn, Cd, and Pb in coastal zooplankton may be related to metal absorption from primary producers, and differences in metal concentrations in phytoplankton from coastal waters (upwelling zone and cyclonic eddy) compared with offshore waters (warm gyre). Zooplankton showed a great capacity for accumulations of trace metals, with average concentration factors of 4 867 929 + or - 569 971, 246 757 + or - 51 321, 337 180 + or - 125 725, 43 480 + or - 11 212, 1 046 371 + or - 110 286, 601 679 + or - 213 949, and 15 420 + or - 9201 for Fe, Co, Ni, Cu, Zn, Cd, and Pb with respect to dissolved concentrations in coastal and offshore waters of the Bay of Bengal.
 
Date 2010-11-29T07:40:21Z
2010-11-29T07:40:21Z
2010
 
Type Journal Article
 
Identifier Environmental Toxicology, vol.25(6); 622-633
http://drs.nio.org/drs/handle/2264/3749
 
Language en
 
Rights Copyright © [2009] Wiley Periodicals, Inc. This is a preprint of an article published in [Environ. Toxicol., vol.25(6); 622-633]”and should provide an electronic link to the Journal’s WWW site, located at the following Wiley URL: http://onlinelibrary.wiley.com/doi/10.1002/tox.20544/abstract
 
Publisher Wiley Periodicals, Inc.