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Seasonal shift in net ecosystem production in a tropical estuary

DRS at CSIR-National Institute of Oceanography

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Title Seasonal shift in net ecosystem production in a tropical estuary
 
Creator Ram, A.S.P.
Nair, S.
Chandramohan, D.
 
Subject ecosystems
estuaries
tropical environment
seasonal variations
organic matter
biological production
heterotrophy
 
Description Net ecosystem production was examined in the Mandovi and Zuari estuaries (southwestern India) and the adjoining coastal waters for a period of 1 yr (January to December 1998). The study period encompassed premonsoon, monsoon, and postmonsoon seasons. At the estuarine stations, net ecosystem production showed monthly variation and a transition from net autotrophy of 49 mmol C m u-2 d u-1 during the nonmonsoon seasons (premonsoon and postmonsoon) to net heterotrophy of -46 mmol C m u-2 d u-1 in the monsoon season. Seasonal monsoon-driven changes such as increased allochthonous inputs resulted in enhanced heterotrophic respiration and reduced primary production in the estuaries. In the coastal station, the monthly variation in net ecosystem production was not significant, and net heterotrophy was prevalent whenever measurements were made, thereby potentially serving as the net source of carbon dioxide to the atmosphere. Results suggest that the excess organic matter from these tropical estuaries supports heterotrophy in the adjacent coastal ecosystem.
 
Date 2008-07-18T05:07:21Z
2008-07-18T05:07:21Z
2003
 
Type Journal Article
 
Identifier Limnology and Oceanography, Vol.48; 1601-1607p.
http://drs.nio.org/drs/handle/2264/1213
 
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 If it is brought to our notice that the rights are violated then the item would be withdrawn.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 American Society of Limnology and Oceanography