Non-redfieldian C:N:P ratio in the inorganic and organic pools of the bay of Bengal during the summer monsoon

Show simple item record Sahoo, Deepika Saxena, Himanshu Tripathi, Nidhi Khan, Mohammad Atif Rahman, Abdur Kumar, Sanjeev Sudheer, A. K. Singh, Arvind 2020-11-20T07:45:54Z 2020-11-20T07:45:54Z 2020-10
dc.identifier.citation Sahoo, Deepika; Saxena, Himanshu; Tripathi, Nidhi; Khan, Mohammad Atif; Rahman, Abdur; Kumar, Sanjeev; Sudheer, A. K. and Singh, Arvind, "Non-redfieldian C:N:P ratio in the inorganic and organic pools of the bay of Bengal during the summer monsoon", Marine Ecology Progress Series, DOI: 10.3354/meps13498, vol. 653, pp. 41-55, Oct. 2020. en_US
dc.identifier.issn 0171-8630
dc.identifier.issn 1616-1599
dc.description.abstract Nitrogen (N) and phosphorus (P) determine the strength of the oceans biological carbon (C) pump, and variation in the N:P ratio is key to phytoplankton growth. A fixed C:N:P ratio (106:16:1) in organic matter and deep-water nutrients was observed by Alfred C. Redfield. However, recent studies have challenged the concept of the Redfield Ratio, and its veracity remains to be examined in oceanic basins like the Bay of Bengal. For this purpose, we sampled the water in the Bay of Bengal for C, N, and P content in the organic and inorganic pools from the surface to 2000 m. Overall, the C:N:P ratio deviated greatly from the Redfield Ratio. The C:N:P ratio in particulate organic matter varied from 232:25:1 in the top layer (surface to the depth of the chlorophyll maximum) to 966:72:1 in the deep water (300-2000 m). In dissolved organic matter, the ratio varied from 357:30:1 in the top layer to 245:66:1 in the deep water. The N:P ratio in nutrients varied from 3 in the top layer to 12 in the deep water. The nutrient-depleted top layer (average NO3- + NO2- ~ 0.7 �mol l-1) with a low N:P ratio coupled with reported low primary production rates in the Bay suggested that the production was N limited. Concurrent N2 fixation rates were not sufficient to alter the observed C:N:P ratio. Eddies showed a mixed effect on the C:N:P ratio. Our C:N:P ratios in particulate organic matter are comparable to other tropical basins and supports the nutrient supply hypothesis for low latitude ecosystems.
dc.description.statementofresponsibility by Deepika Sahoo, Himanshu Saxena, Nidhi Tripathi, Mohammad Atif Khan, Abdur Rahman, Sanjeev Kumar, A. K. Sudheer and Arvind Singh
dc.language.iso en_US en_US
dc.publisher Inter Research en_US
dc.subject Northern Indian Ocean en_US
dc.subject Elemental Stoichiometry en_US
dc.subject Organic Matter en_US
dc.subject Nitrogen Limitation en_US
dc.title Non-redfieldian C:N:P ratio in the inorganic and organic pools of the bay of Bengal during the summer monsoon en_US
dc.type Article en_US
dc.relation.journal Marine Ecology Progress Series

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