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Distribution of diatom Pseudo-nitzschia and dinoflagellates of Dinophysis spp along coast off Goa

DRS at CSIR-National Institute of Oceanography

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Title Distribution of diatom Pseudo-nitzschia and dinoflagellates of Dinophysis spp along coast off Goa
 
Creator Alkawri, A.A.S.
Ramaiah, N.
 
Subject phytoplankton
Diatom
Dinoflagellates
Toxic phytoplankton
 
Description As a part of an annual analysis on the phytoplankton distribution and composition, regular monthly sampling carried out during October 2007-September 2008 from salinity gradient zones in the intertidal waters along the coast of Goa (India). Among the 179 species of phytoplankton observed during this study, as many as 11 of them are recognized, potentially toxic ones. The toxic diatom species, Pseudo-nitzschia pungens was quite preponderant, in particular during the pre-monsoon month of May 2008 off Chapora, a perennially low salinity location. Among the 10 toxic dinoflagellate species detected, the known toxic species, Alexandrium minutum followed by Dinophysis acuminata were found to attain maximum cell numbers in the study area. It is apparent from our results that the toxic species do occur in all salinity zones sampled and during many months of the year in coastal waters off Goa. Though directly governed by the variations in nutrient concentrations, some of these toxic phytoplankton species attain high cell numbers. It is reasonable for us to therefore caution that the toxic species do prevail in these waters
 
Date 2011-01-31T05:03:57Z
2011-01-31T05:03:57Z
2011
 
Type Journal Article
 
Identifier Journal of Environmental Biology, vol.32(1); 2011; 65-70
http://drs.nio.org/drs/handle/2264/3783
 
Language en
 
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