Sundarbans mangroves

The Sundarbans mangroves is a mangroves ecoregion located in the Indomalaya biogeographic realm, covering South and Southeast Asia, extending from the Indian subcontinent to southern China, spanning approximately 20,383 km². Classified under the WWF ecoregion code IM1406, this region represents a distinct ecological community shaped by its unique combination of climate, geography, and evolutionary history.

Climate and Vegetation

This ecoregion experiences tropical to subtropical coastal zones with brackish water and tidal influence. The dominant vegetation consists of salt-tolerant trees and shrubs with specialised root systems. These conditions create the foundation for the ecological communities found within the Sundarbans mangroves.

Ecological Significance

Mangrove forests protect coastlines from erosion and storms, serve as nurseries for commercial fish species, and sequester carbon at rates exceeding most terrestrial forests per unit area. The Sundarbans mangroves contributes to the broader biodiversity patterns of the Indomalaya realm.

Geographic Distribution

The Sundarbans mangroves extends entirely within Bangladesh. This geographic range places it within the Indomalaya realm, one of the eight major biogeographic divisions of the world.

Notable Species

The Sundarbans mangroves supports a range of wildlife, including African payal (Salvinia auriculata), Alligatorweed (Alternanthera philoxeroides), Allspice (Pimenta dioica), Arrowleaf elephant's ear (Xanthosoma sagittifolium), Asian paddle crab (Charybdis japonica), Barnyard Grass (Echinochloa crus-galli), Beach sheoak (Casuarina equisetifolia), Bermudagrass (Cynodon dactylon), and 42 more species.

Conservation

Like many mangroves ecosystems, the Sundarbans mangroves faces threats from coastal development, aquaculture expansion, sea-level rise, and pollution. Conservation efforts in this ecoregion focus on habitat preservation, sustainable land management, and protecting corridors that connect fragmented habitat patches.