CHANGES IN THE BIOMASS CONTENT IN SUNDARBAN AREA: A REMOTE SENSING APPROACH
The Sundarban, covering about one million ha in the delta of the rivers Ganga, Brahmaputra and Meghna at the point where it merges with the Bay of Bengal, is the single largest block of tidal halophytic mangrove forest in the world shared between Bangladesh (62%) and India (38%), which supports a large, biodiversity-rich unique ecosystem. The larger part (62%) is situated in the southwest corner of Bangladesh located between 21°30 ‘ N to 22°30 ‘N and longitude 89° E to 90° E. The forest has a unique biodiversity comprising 334 species of plants. The mangroves of the Sundarban are unique when compared to non-deltaic coastal mangrove forest, the prime species are sundri Heritiera fames and gewa Excoecaria agallocha. The Sundarban can be classified as moist tropical seral forest, comprising a mosaic of beach forest and tidal forest. Of the latter, there are four types: low mangrove forests, tree mangrove forests, salt-water Heritiera forests and freshwater Heritiera forests. Sundarban West occurs within the salt-water zone, which supports sparse Ecoecaria agallocha, a dense understory of Ceriops, and dense patches of hantal palm Phoenixpaludosa on drier soils. Dhundal and passur Xylocalpus spp., and Bruguiera occur sporadically throughout the area. Sundri and gewa cover most of the Sundarban but Oryza coarctata, Nypa fruticans and Imperata cylindrica are prevalent on mud flats. Large stands of keora Sonneratia apetala are found on newly accreted mudbanks and provide important wildlife habitat. (MS Rahman).The main objective of this study is to develop an appropriate classification map to represent the biomass content/forest cover in this area, to evaluate the forest cover change ( sundori, gewa and others ) in study area for the period of 1980- 2012 .
This paper quantifies biomass content /mangrove forest cover change in Sundarban area .The mangrove forests in this area are intermixed...
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