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Variations in concentrations and fluxes of dimethylsulfide (DMS) from the Indian estuaries

DRS at CSIR-National Institute of Oceanography

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Title Variations in concentrations and fluxes of dimethylsulfide (DMS) from the Indian estuaries
 
Creator Viswanadham, R.
Bharathi, M.D.
Sarma, V.V.S.S.
 
Subject OCEANOGRAPHY AND LIMNOLOGY
CHEMISTRY AND BIOGEOCHEMISTRY
CHEMISTRY AND BIOGEOCHEMISTRY
AQUATIC COMMUNITIES
OCEANOGRAPHY AND LIMNOLOGY
 
Description In order to examine the variations in concentrations of dimethylsulfide (DMS) and its fluxes to the atmosphere, 25 major and medium estuaries from Indian subcontinent were sampled during wet and dry periods. River discharge brought substantial amount of nutrients and suspended particulate matter (SPM) to the Indian estuaries; however, the concentration of phytoplankton biomass was severely limited by latter due to shallowing of photic depth. Bacillariophyceae was the dominant phytoplankton group in the Indian estuaries followed by green algae, Cyanophyceae, and Dinophyceae. Relatively higher concentrations of DMS were observed in the estuaries located along the east (3.6 ± 5.7 nM) than the west coast of India (0.8 ± 0.3 nM) during wet period whereas no significant differences were observed during dry period. The concentrations of DMS were significantly lower during wet than dry period and it was consistent with the phytoplankton biomass. The slope of the relation between DMS and phytoplankton biomass displayed a significant spatial variation due to contribution of different groups of phytoplankton in the Indian estuaries. The concentrations of DMS in the Indian estuaries were higher than other estuaries in the world except some Chinese estuaries. The annual mean flux (1.95 ± 2.5 Micromol m-2 day-1) from the Indian estuaries is lower than that of other estuaries in the world, except Pearl River estuary due to inhibition of phytoplankton growth by suspended load and low flushing rates
 
Date 2016-05-12T11:51:41Z
2016-05-12T11:51:41Z
2016
 
Type Journal Article
 
Identifier Estuaries and Coasts, vol.39(3); 2016; 695-706
http://drs.nio.org/drs/handle/2264/4960
 
Language en
 
Rights Copyright [2016]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository
 
Publisher Coastal and Estuarine Research Federation