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Seasonality and composition of phytoplankton in the Arabian Sea

DRS at CSIR-National Institute of Oceanography

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Title Seasonality and composition of phytoplankton in the Arabian Sea
 
Creator Sawant, S.S.
Madhupratap, M.
 
Subject phytoplankton
abundance
composition
seasonality
population density
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Bacillariophyceae
 
Description Phytoplankton abundance and composition were studied from the central and eastern Arabian Sea during three seasons namely inter-monsoon, winter and summer. Overall, phytoplankton population density was high during winter and summer periods and low during the inter-monsoon. Integrated cell numbers in the upper 120 m was from 0.4 to 1.2, 1.7 to 170 and 0.3 to 10 (X 10 sup(8)) cells m sup(-2) during inter-monsoon, winter and summer monsoon periods, respectively. Diatoms comprised 86% of the total population when three seasons were combined, followed by cyanobacteria (7%) and dinoflagellate (6%). The common diatoms were Nitzschia sp., N. seriata, N. longissima, Thalassiothrix spp., Rhizosolenia spp. and Chaetoceros spp. Some diatoms like Fragilaria sp., Thalassiothrix longissima, N. longissima, Rhizosolenia sp. and Chaetoceros pendulus were more abundant during the summer monsoon. The genera Fragilaria, Guinardia, Hemiaulus, Leptocylindrus and Lauderia appeared only during this season. A large number of diatoms were observed in sediment traps during winter.
 
Date 2009-01-20T11:49:31Z
2009-01-20T11:49:31Z
1996
 
Type Journal Article
 
Identifier Current Science, Vol.71; 869-873p.
http://drs.nio.org/drs/handle/2264/2142
 
Language en
 
Rights Copyright [1996]. 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 Current Science Association, Bangalore, India