Abstract
Sunderban, the mangroves in the Ganga-Brahmaputra-Meghna delta shared between India and Bangladesh are the largest coastal wetland system, well known for their floral diversity. Vegetation survey and analysis was carried out at 42 forest sites randomly selected in Sundarban to record 30 species of mangrove plants belonging to 18 families. Change dynamics of mangrove forests was also studied taking Champion and Seth (1968) forest type classification as a baseline to record striking changes in forest composition. Significant changes were observed in vegetation composition at sites previously demarcated under a particular sub-type. Palm swamp with predominantly Phoenix paludosa have converted into mangrove scrub with mixed species composition. Some new species have emerged in pure mangrove forest (4B/TS2) which has acquired character of salt water mixed forest (Heretiera). These composition and structure changes of Sundarban forests may be attributed climatic change and anthropogenic pressure.
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