What is it about?
Biogeochemical processes was studied using elemental rations of particulate C and N in Asia's largest brackish water lagoon, Chilika, India. The results showed significant influence of terrestrial organic matter in the lagoon biogeochemistry. Re-mineralised nutrients provide strong support to the primary productivity of the Lagoon. Spatio-temporal variation in carbon and nitrogen processes of the shallow water column was significant.
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Why is it important?
This work was undertaken in order to understand the influence of anthropocentric nutrients on the primary production of the lagoon. Significance of new production in this shallow lagoon was also determined.
Perspectives
This is work required multidisciplinary expertise and was conducted as a joint research study under the ecosystem modelling program on Chilika lagoon, India. Efforts were made for the first time to study isotopic signatures of suspended solid in the shallow lagoon. Dependency of the primary producers on re-mineralised inorganic nitrogen was estimated. In the context of ever-increasing supply of anthropogenic nutrients to the coastal waters, the physiological and biochemical response by the autotrophs need to be resolved in order to prepare a better water quality management plan.
Dipnarayan Ganguly
National centre for sustainable coastal management
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This page is a summary of: Isotopic composition (C & N) of the suspended particles and N uptake by phytoplankton in a shallow tropical coastal lagoon, Chemistry and Ecology, August 2017, Taylor & Francis,
DOI: 10.1080/02757540.2017.1356292.
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