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

Autor: Abhilash KR; National Institute of Oceanography, Regional Centre, Council of Scientific and Industrial Research (CSIR), Kochi 682 018, Kerala, India. abhilashk@nio.org, Raveendran TV, Limna Mol VP, Deepak MP
Jazyk: angličtina
Zdroj: Marine environmental research [Mar Environ Res] 2012 Aug; Vol. 79, pp. 160-6. Date of Electronic Publication: 2012 May 27.
DOI: 10.1016/j.marenvres.2012.05.005
Abstrakt: 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). The present study forms a pioneering attempt 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 μmol O(2) m(-2) h(-1)) was almost twice that of the wet season (1431.28 μmol O(2) m(-2) h(-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.
(Copyright © 2012 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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