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Stress and toxicity of biologically important transition metals (Co, Ni, Cu and Zn) on phytoplankton in a tropical freshwater system: An investigation with pigment analysis by HPLC

DRS at CSIR-National Institute of Oceanography

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Title Stress and toxicity of biologically important transition metals (Co, Ni, Cu and Zn) on phytoplankton in a tropical freshwater system: An investigation with pigment analysis by HPLC
 
Creator Chakraborty, P.
Babu, P.V.R.
Acharyya, T.
Bandyopadhyay, D.
 
Subject Trace metal stress
Pigment analysis
Phytoplankton community
 
Description Stress and toxicity of four biologically important transition metals (Co, Ni, Cu and Zn) on phytoplankton in Godavari River (a tropical freshwater system) were studied to understand the fate of phytoplankton of freshwater if it receives metal contaminated water imposed by these four metals. Shift in community structure of phytoplankton and their different tolerance levels for different metals were also investigated. It was found that the variation of metal concentrations at lower level (1 x 10 sup(-9) to 1 x 10 sup(-8) M) did not show a dramatic change in the total biomass or concentrations of the pigment markers. At concentration of 1 x 10 sup(-7) M of metal, Cu acted as a nutrient and helped to increase the biomass followed by Co, Ni and Zn. The variation in biomass in the freshwater system under exposure to different metals at high concentration of 1 x 10 sup(-6) M indicates that Cu had strongest interactions with biotic ligand and was taken up by phytoplankton and acted as the most toxic metal followed by Zn, Co and Ni. Phytoplankton communities in Godavari River have different tolerance levels for different metals. Cu and Zn were found to be lethal at high concentration for both green algae and cyanobacteria. Cyanobacteria were found to be very sensitive to slight variation in Ni concentration and Co was found to be less toxic than Cu and Zn even at high exposed concentration
 
Date 2010-06-21T11:30:01Z
2010-06-21T11:30:01Z
2010
 
Type Journal Article
 
Identifier Chemosphere, vol.80(5); 548-553
no
http://drs.nio.org/drs/handle/2264/3644
 
Language en
 
Relation Chemosphere_80_548.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2010] Elsevier
 
Publisher Elsevier