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Bacterial abundance and production in the central and eastern Arabian Sea

DRS at CSIR-National Institute of Oceanography

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Title Bacterial abundance and production in the central and eastern Arabian Sea
 
Creator Ramaiah, N.
Raghukumar, S.
Gauns, M.
 
Subject plankton
primary production
abundance
seasonal variations
spatial variations
Bacteria
 
Description Seasonal and spatial variations in bacterial and picoplankton abundances and bacterial production (thymidine incorporation rates) were determined in the water column up to 150 m in several stations in the central and eastern Arabian Sea. Higher bacterial densities of about 1 x 10 sup(9) cells L sup(-1) were observed during the intermonsoon periods of September and April/May compared to the southwest monsoon period of July/August and the winter period of February/March. Although primary production was low during April/May, bacterial production was much higher during this period unlike July/August. It also showed an increase from the northern to the southern Arabian Sea, suggesting the presence of high amounts of dissolved organic carbon in this area. High picoplankton densities, ranging up to 45 x 10 sup(6) cells L sup(-1) were observed during February, particularly in the northern Arabian Sea. Rapid turnover of bacteria during the intermonsoon period of April/May suggests the predominance of a 'microbial loop' in the foodweb and a prevailing source of dissolved organic carbon in the oceanic waters.
 
Date 2009-01-20T08:46:49Z
2009-01-20T08:46:49Z
1996
 
Type Journal Article
 
Identifier Current Science, Vol.71; 878-882p.
http://drs.nio.org/drs/handle/2264/2134
 
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