Introduction
Wetlands are transitional ecosystems bridging terrestrial and aquatic environments, characterized by saturated soils and adapted vegetation, encompassing marshes, peatlands, mangroves, and lakes. In India, they are regulated under the Wetlands (Conservation and Management) Rules, 2017. Recognising their critical ecological value, India has steadily expanded its network of Ramsar Sites, reflecting a strong commitment to wetland conservation.
Ecological and Socio-Economic Significance of Wetlands
- Water Purification ("Kidneys of the Earth"): Wetlands function as natural bio-filters that trap sediments, absorb excess nutrients, and neutralise heavy metals. For example, the East Kolkata Wetlands organically treat millions of litres of municipal sewage daily through biological oxidation.
- Climate Mitigation and Coastal Resilience: Wetland ecosystems, especially coastal mangroves and salt marshes, act as critical "blue carbon" sinks, sequestering carbon faster than terrestrial forests. They also serve as protective bio-shields against cyclones and storm surges, as demonstrated by the Bhitarkanika mangroves mitigating structural damage during coastal cyclones.
- Biodiversity Hotspots: Wetlands host exceptional biological diversity and serve as vital staging grounds for migratory birds along routes like the Central Asian Flyway. For instance, Loktak Lake in Manipur supports unique floating biomass (phumdis) and provides habitat for the endangered Sangai deer.
- Hydrological Regulation and Flood Attenuation: Acting as ecological sponges, wetlands absorb excess runoff during monsoons to curb flood intensity, while simultaneously recharging local aquifers to maintain base flow in rivers during lean seasons.
- Livelihood Security: Wetlands directly sustain millions through inland fisheries, aquaculture, reed harvesting, non-timber forest products, and eco-tourism, anchoring regional rural economies.
Conclusion
Addressing the growing threats of encroachment and pollution requires transitioning towards community stewardship and participatory governance. Initiatives like the Amrit Dharohar scheme operationalise this vision by promoting the 'wise use' principle of the Ramsar Convention, aligning conservation with Sustainable Development Goal 6 (Clean Water) and Goal 13 (Climate Action).