Carbon Sequestration Potential of Salt-Tolerant Species in the Coastal Ecosystems of Sagar Island, Hugli Estuary, India

This study examines the key biota and their biologically zoned distribution on the tidal flats of Sagar Island. It explores the zonation and succession of salt marsh and mangrove ecosystems and ecological factors. The research includes biomass estimation and assesses the response to sea-level changes. Notable biota include mangroves, salt marshes, polychaetes, molluscs, and avifauna. Biogeography, climate, and substrate influence species distribution, while physiochemical and biological conditions affect species abundance and zonation. Data from 47 villages on Sagar Island, covering 234.35 sq km, identify 21 species, with Harcachkata, Excoecaria Agallocha, and Avicennia Marina dominating. The study reports a total carbon stock of 4549 tons/ha, with significant contributions from Avicennia Marina and Casuarina. The findings highlight Avicennia Marina's carbon sequestration potential, suggesting non-destructive methods for estimating carbon stock in Sagar Island's tree species.