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Sediment Oxygen Demand in Cochin backwaters, a tropical estuarine system in the south-west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Sediment Oxygen Demand in Cochin backwaters, a tropical estuarine system in the south-west coast of India
 
Creator Abhilash, K.R.
Raveendran, T.V.
LimnaMol, V.P.
Deepak, M.P.
 
Subject sediments
oxygen demand
spatial variations
temporal variations
 
Description Eutrophication has often been one of the major problems encountered in estuaries and coastal waters. The oxic/anoxic status of an estuary can be effectively determined by measurement of the Sediment Oxygen Demand (SOD). An attempt is made to evaluate the SOD of the Cochin Backwater System (CBS), a tropical eutrophic estuary in the south-west coast of India. The CBS exhibited significant spatio-temporal variations in SOD. The mean net SOD during the dry season (2569.73 mu mol O sub(2) m sup(−2) h sup(−1)) was almost twice that of the wet season (1431.28 mu O sub(2) m sup(−2) h sup(−1)), presumably due to higher discharge during the latter season. The observed pockets of net oxygen release indicate that the CBS still retains certain autotrophic regions in spite of heavy organic drains. The low oxygen flux in light chambers points towards the role of microphytobenthos in maintaining the oxygen reservoir of the estuarine system.
 
Date 2012-07-27T11:52:18Z
2012-07-27T11:52:18Z
2012
 
Type Journal Article
 
Identifier Marine Environmental Research, vol.79; 2012; 160-166
no
http://drs.nio.org/drs/handle/2264/4105
 
Language en
 
Relation Mar_Environ_Res_79_160.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2012] Elsevier
 
Publisher Elsevier