India’s Wetlands
Wetlands are among the most productive ecosystems on Earth, providing vital ecological services and supporting millions of lives. They occupy a unique space as transitional zones between terrestrial and aquatic ecosystems, offering both biodiversity richness and livelihood opportunities.
Ecological and Socio-economic Significance of Wetlands
- Wetlands act as natural buffers, absorbing floodwaters, mitigating storm impacts, and preventing coastal erosion.
- They help in water purification by filtering sediments, pollutants, and excess nutrients.
- Wetlands play a crucial role in groundwater recharge, maintaining stream flow even during dry seasons.
- Provide habitats for diverse flora and fauna, including migratory and endangered species.
- Act as carbon sinks, storing significant amounts of carbon and helping mitigate climate change.
- Support the livelihoods of millions of people, supplying water, fish, fodder, fuelwood, food grains (like paddy), and raw materials like reeds and thatch.
- Offer recreational, cultural, and educational value, promoting eco-tourism and preserving heritage sites.
Status of Wetlands in India
- India has about 27,403 wetlands, covering approximately 15.26 million hectares (~4.6% of India’s land area).
- Inland wetlands: ~23,444
- Coastal wetlands: ~3,959
- Wetlands account for 18.4% of the country’s area, with ~70% under paddy cultivation.
- India is home to 75 Ramsar Sites (Wetlands of International Importance) covering ~1.093 million hectares.
- Wetlands are found in varied forms:
- High-altitude wetlands in the Himalayas
- Floodplains of major river systems (Ganga, Brahmaputra)
- Saline and seasonal wetlands in arid/semi-arid regions
- Coastal wetlands: estuaries, lagoons, mangroves, swamps, coral reefs
Major Threats to Wetlands
- Land conversion for agriculture, aquaculture, and urban development.
- Overgrazing and sand mining that degrade wetland ecology.
- Pollution from domestic waste, agricultural runoff, and industrial effluents.
- Encroachment and deforestation in wetland areas.
- Climate change impacts such as rising sea levels and altered precipitation patterns.