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Identification of non-indigenous phytoplankton species dominated bloom off Goa using inverted microscopy and pigment (HPLC) analysis

DRS at CSIR-National Institute of Oceanography

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Title Identification of non-indigenous phytoplankton species dominated bloom off Goa using inverted microscopy and pigment (HPLC) analysis
 
Creator Bhaskar, P.V.
Roy, R.
Gauns, M.
Shenoy, D.M.
Rao, V.D.
Mochemadkar, S.
 
Subject phytoplankton
algal blooms
pigments
Heterocapsa
Scripsiella
Gymnodinium
 
Description An unusual phytoplankton bloom dominated by unidentified green coloured spherical algal cells (approx 5 mu m diameter) and dinoflagellates (Heterocapsa, Scripsiella and Gymnodinium) was encountered along the coast of Goa, India during 27 and 29 January, 2005. Pigment analysis was carried out using both fluorometric and HPLC methods. Seawater samples collected from various depths within the intense bloom area showed high concentrations of Chl a (up to 106 mg m sup(-3)) associated with low bacterial production (0.31 to 0.52 mg C m sup(-3) h sup-1)) and mesozooplankton biomass (0.03 ml m sup(-3)). Pigment analyses of the seawater samples were done using HPLC detected marker pigments corresponding to prasinophytes, dinoflagellates and diatoms. Chlorophyll b (36?56%) followed by peridinin (15?30%), prasinoxanthin (11?17%) and fucoxanthin (7?15%) were the major diagnostic pigments while pigments of cryptophytes and cyanobacteria including alloxanthin and zeaxanthin formed
 
Date 2012-08-24T07:47:26Z
2012-08-24T07:47:26Z
2011-12
 
Type Journal Article
 
Identifier Journal of Earth System Science, vol.120(6); 1145-1154p. 393-403
http://drs.nio.org/drs/handle/2264/4124
 
Language en
 
Rights ? Indian Academy of Sciences. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Indian Academy of Sciences