River ecosystems in Bangladesh are among the richest and most dynamic aquatic habitats in the world. The country is crisscrossed by over 700 rivers, including major ones like the Padma, Jamuna, Meghna, and Brahmaputra, creating an extensive network of freshwater ecosystems. These rivers support a diverse array of flora and fauna, including numerous fish species, aquatic plants, invertebrates, amphibians, reptiles, and birds.
These ecosystems are vital for maintaining water quality, regulating floods, recharging groundwater, and supporting agriculture, fisheries, and transportation. River ecosystems also provide critical habitats for endangered species such as the Ganges river dolphin and the hilsa fish (ilish), which is the national fish of Bangladesh.
However, river ecosystems face significant threats from pollution, sedimentation, overfishing, riverbank erosion, encroachment, and climate change-induced changes in water flow and salinity. Seasonal flooding and riverine erosion affect livelihoods but also replenish soil fertility and maintain ecosystem functions.
Conservation and management efforts focus on sustainable fisheries, pollution control, habitat restoration, and integrated water resource management. Agencies like the Department of Environment, Department of Fisheries, and Bangladesh Water Development Board collaborate to balance ecological health with socio-economic needs, aiming to safeguard these vital ecosystems for future generations.