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Particle-associated bacterial dynamics in a tropical tidal plain (Zuari estuary, India)

DRS at CSIR-National Institute of Oceanography

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Title Particle-associated bacterial dynamics in a tropical tidal plain (Zuari estuary, India)
 
Creator DeSouza, M.J.B.D.
Nair, S.
LokaBharathi, P.A.
Chandramohan, D.
 
Subject biological production
biomass
abundance
enzymatic activity
physicochemical properties
biological properties
annual variations
water column
Bacteria
 
Description The dynamics of particle-associated bacteria (PAB) in a tropical estuary, Zuari, in Goa on the west coast of India, was studied for a year from September 1997 to October 1998. Bacterial abundance, productivity and enzymatic activities were measured at fixed station in the estuary. The study period covered pre-monsoon (February to May), southwest monsoon (June to September) and post-monsoon (October to January) seasons. Particulate organic carbon ranged from 0.5 to 17.5 mg C l u-1. Particles of size range is greater than 3 to less than 220 mu m were the most abundant, were rich in organic carbon (approx. 60%), and formed 55% of the suspended load (ave. approx. 0.1 g l u-1) in the estuary. PAB ranged from 8.8 x 10 u7 to 3.9 x 10 u10 l u-1 and the waters close to the sediment had a higher abundance than the surface waters. PAB varied seasonally and accounted for 20 to 80% of the total bacterial population. The mean rate of production as measured by u3H-Thymidine incorporation was 70 mu g C l u-1 d u-1 in the surface and 35 mu g C l u-1 d u-1 in the bottom waters. Monthly production varied by 2 orders and was not coupled to abundance. However, high production during the monsoon was fuelled by allochthonous input of organic matter. No linear relationship was observed between biological parameters and other measured environmental parameters except for temperature, which showed a linear relationship with PAB and particle numbers. The bacterial carbon demand (BCD) at the station was higher than the primary production (PP) and was met by allochthonous input. The study demonstrates that the PAB dynamics were determined by the availability of substrates and resuspension of sedimented materials
 
Date 2008-07-18T05:07:18Z
2008-07-18T05:07:18Z
2003
 
Type Journal Article
 
Identifier Aquatic Microbial Ecology, Vol.33; 29-40p.
http://drs.nio.org/drs/handle/2264/1204
 
Language en
 
Rights Copyright [2003]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
 
Publisher Inter Research