Sundarbans

Sundarbans
Name	Sundarbans
Location	Bay of Bengal, Ganges Delta, West Bengal, Bangladesh
Nearest city	Kolkata, Khulna
Area	~10,000 km²
Established	various dates (protected areas, 1973–1994)
Governing body	multiple authorities (state governments, national agencies)

Sundarbans is the largest contiguous mangrove forest in the world, straddling the Ganges Delta across West Bengal in India and the Khulna Division in Bangladesh. The region forms a complex network of tidal waterways, mudflats, and salt-tolerant vegetation at the interface of the Bay of Bengal and major river systems such as the Ganges, Brahmaputra, and Meghna. It is internationally recognized for its ecological significance, cultural history, and role in regional livelihoods, attracting attention from organizations including the United Nations Educational, Scientific and Cultural Organization, the International Union for Conservation of Nature, and national agencies like the Forest Department, West Bengal and the Bangladesh Forest Department.

Geography and Boundaries

The mangrove landscape occupies the deltaic plain of the Ganges Delta where distributaries such as the Hooghly River, Padma River, and Tetulia River create sedimentary islands and estuaries adjacent to the Bay of Bengal, the Bay of Bengal Shelf, and coastal features mapped by agencies like the Survey of India, the Bangladesh Water Development Board, and NASA remote sensing programs. Political boundaries divide the area between West Bengal districts such as North 24 Parganas, South 24 Parganas, and Kolkata hinterlands, and Bangladeshi divisions including Khulna Division and Satkhira District, with protected zones designated under instruments like the Wildlife Protection Act, 1972 in India and the Wildlife Preservation Ordinance, 1973 in Bangladesh. Tidal regimes are influenced by seasonal monsoonal patterns linked to the Indian Ocean Dipole, the Southwest Monsoon, and cyclone tracks such as Cyclone Sidr and Cyclone Amphan, while geomorphology reflects sediment deposition described in studies by the Geological Survey of India and the Bangladesh Geological Survey.

Ecology and Biodiversity

The ecosystem supports a unique assemblage of flora and fauna, including keystone species such as the elusive royal Bengal tiger, salt-tolerant mangroves like Heritiera littoralis-dominated stands, and diverse bird assemblages recorded by organizations like the BirdLife International and the Wetlands International. Faunal diversity encompasses mammals such as the Indian grey mongoose, estuarine reptiles including the saltwater crocodile and the king cobra, and marine taxa like the Irrawaddy dolphin and various Penaeus monodon populations exploited commercially. Avifauna recorded in inventories include migratory and resident species monitored under initiatives by the Ramsar Convention, the Asian Waterbird Census, and the Royal Society for the Protection of Birds, while invertebrate and fish communities are documented in surveys by the Bangladesh Fisheries Research Institute and the Central Inland Fisheries Research Institute. The area’s primary productivity and carbon sequestration roles have been quantified in studies led by the Intergovernmental Panel on Climate Change, the United Nations Environment Programme, and national research institutes such as the Indian Council of Forestry Research and Education.

History and Human Settlement

Human habitation in the delta dates to prehistoric and medieval periods referenced in archaeological work by the Archaeological Survey of India and the Bangladesh Archaeological Department, with later settlement patterns shaped by colonial-era policies under the British East India Company, land revenue systems such as the Permanent Settlement (1793), and agrarian changes during the British Raj. Local communities include ethnic groups like the Munda people, Oraon people, and Bengali people whose livelihoods historically depended on rice cultivation, aquaculture, and forest products documented by scholars at the School of Oriental and African Studies and the University of Calcutta. Colonial and postcolonial events—such as the Partition of India and the Bangladesh Liberation War—affected demographics, governance, and resource access, prompting migration patterns studied by institutions like the International Organization for Migration and the United Nations Development Programme.

Economy and Resource Use

Economic activities in the region revolve around fisheries monitored by the Food and Agriculture Organization, timber and non-timber forest product extraction regulated by the Forest Department, West Bengal and the Bangladesh Forestry Research Institute, salt production linked to coastal salt pans, and horticulture promoted by agricultural research from the Indian Council of Agricultural Research and the Bangladesh Agricultural Research Institute. Mangrove-dependent livelihoods include honey collection by licensed honey hunters registered with local panchayats and unions, crab fattening developed in projects funded by the World Bank and bilateral development agencies like the Asian Development Bank, and eco-tourism enterprises operating in collaboration with organizations such as the Ministry of Environment, Forest and Climate Change (India) and the Ministry of Environment, Forest and Climate Change (Bangladesh). Trade routes connect riverine markets to urban centers like Kolkata and Port of Mongla, and supply chains for commercially valuable species are subject to regulations under international agreements including the Convention on International Trade in Endangered Species of Wild Fauna and Flora.

Conservation and Management

Conservation measures include transboundary protected areas such as national parks and wildlife sanctuaries managed by the Sundarban Tiger Reserve authorities, biosphere initiatives aligned with the UNESCO Biosphere Reserve designation, and Ramsar listings coordinated through the Ramsar Convention Secretariat. Management strategies draw on integrated coastal zone management frameworks advocated by the International Union for Conservation of Nature, community-based forestry projects supported by the World Wildlife Fund, and climate adaptation planning financed by the Green Climate Fund and implemented with technical support from the United Nations Development Programme. Research collaborations involve universities such as the Jadavpur University, the University of Dhaka, and international centers like the International Centre for Integrated Mountain Development and the Stockholm Environment Institute, focusing on biodiversity monitoring, patrolling against illegal logging and poaching coordinated with law enforcement bodies like the Indian Forest Service and the Bangladesh Police.

Threats and Climate Change impacts

The region faces multiple threats including habitat fragmentation from embankment construction advocated during colonial projects and modern infrastructure schemes by agencies like the National Highways Authority of India, pollution from upstream activities in the Ganges and Brahmaputra basins, and resource overexploitation documented by the World Bank and the International Union for Conservation of Nature. Sea-level rise linked to IPCC assessments, increased cyclone intensity exemplified by Cyclone Aila, saline intrusion studied by the Bangladesh Centre for Advanced Studies, and land subsidence investigated by the National Geophysical Research Institute exacerbate habitat loss and threaten human settlements monitored by humanitarian organizations such as the International Federation of Red Cross and Red Crescent Societies and the United Nations Office for the Coordination of Humanitarian Affairs. Adaptation measures promoted by multilateral donors include mangrove restoration projects led by the Food and Agriculture Organization and disaster risk reduction initiatives integrated into national plans by the Ministry of Home Affairs (India) and the Ministry of Disaster Management and Relief (Bangladesh).

Category:Mangrove forests Category:Protected areas of India Category:Protected areas of Bangladesh