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Rise of the dormant: Simulated disturbance improves culturable abundance, diversity, and functions of deep-sea bacteria of Central Indian Ocean Basin

DRS at CSIR-National Institute of Oceanography

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Title Rise of the dormant: Simulated disturbance improves culturable abundance, diversity, and functions of deep-sea bacteria of Central Indian Ocean Basin
 
Creator LokaBharathi, P.A.
Nair, S.
 
Subject microorganisms
aquaculture techniques
abundance
ecosystem disturbance
sediments
benthos
dry weight
dominant species
genetic diversity
biodiversity
 
Description The abundance of baroduric bacteria from nine sediment cores (0-10 cm below sea floor) was examined for their response to simulated benthic disturbance in the Central Indian basin (CIB). While the total counts of bacteria decreased from 10 sup(9 ) to 10 sup(6) g sup(-1) dry wt sediment, the average retrievable counts (CFU-colony forming units) improved by two orders of magnitude, i.e., from 10 sup(2) to 10s sup(4) g sup(-1) dry wt sediment. The baroduric retrievable forms were dominated by Acinetobacter and Moraxella sp before the disturbance. After the disturbance the generic diversity was represented by Staphylococcus sp, Enterobacter sp, Micrococcus sp, Coryneforms sp, and Pseudomonas sp in addition to Acinetobacter. These observations were corroborated by changes in enzymatic activities of the retrievable bacteria, which could lead to changes in the biochemical characteristics of the sediment. Thus the simulated disturbance brought about an increase in culturable abundance, taxonomic and functional diversity of deep-sea sediment of the CIB.
 
Date 2008-02-22T04:36:13Z
2008-02-22T04:36:13Z
2005
 
Type Journal Article
 
Identifier Marine georesources and geotechnology, Vol.23; 419-428p.
http://drs.nio.org/drs/handle/2264/875
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Taylor and Francis