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Distribution and sources of particulate organic matter in the Indian monsoonal estuaries during monsoon

DRS at CSIR-National Institute of Oceanography

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Title Distribution and sources of particulate organic matter in the Indian monsoonal estuaries during monsoon
 
Creator Sarma, V.V.S.S.
Krishna, M.S.
Prasad, V.R.
Kumar, B.S.K.
Naidu, S.A.
Rao, G.D.
Viswanadham, R.
Sridevi, T.
Kumar, P.P.
Reddy, N.P.C.
 
Subject organic matter
phytoplankton
biomass
estuary
 
Description The distribution and sources of particulate organic carbon (POC) and nitrogen (PN) in 27 Indian estuaries were examined during the monsoon using the content and isotopic composition of carbon and nitrogen. Higher phytoplankton biomass was noticed in estuaries with deeper photic zone than other estuaries receiving higher suspended matter. The delta13CPOC and delta15CPN data suggest that relatively higher delta13CPOC (-27.9 to -22.6‰) and lower delta15CPN (0.7 to 5.8‰) were noticed in the estuaries located in the northern India, north of 16°N, and lower delta13CPOC (-31.4 to -28.2‰) and higher delta15CPN (5 to 10.3‰) in the estuaries located in the southern India. This is associated with higher Chl a in the northern than southern estuaries suggesting that in situ production contributed significantly to the POC pool in the former, whereas terrestrial sources are important in the latter estuaries. The spatial distribution pattern of delta15CPN is consistent with fertilizer consumption in the Indian subcontinent, which is twice as much in the northern India as in the south whereas delta13CPOC suggests that in situ production is a dominant source in the southern and terrestrial sources are important in the northern estuaries. Based on the Stable Isotope Analysis in R model, 40–90% (70–90%) of organic matter is contributed by C3 plants (freshwater algae) in the estuaries located in the northern (southern) India.
 
Date 2015-01-08T08:51:48Z
2015-01-08T08:51:48Z
2014
 
Type Journal Article
 
Identifier Journal of Geophysical Research (G: Biogeosciences), vol.119(11); 2014; 2095-2111
no
http://drs.nio.org/drs/handle/2264/4677
 
Language en
 
Relation J_Geophys_Res_G_119_2095.jpg
 
Rights An edited version of this paper was published by AGU. Copyright [2014] AGU. To view the published open abstract, go to http://dx.doi.org/10.1002/2014JG002721
 
Publisher American Geophysical Union