Wetlands, Ramsar sites, mangroves & coral reefs

Wetlands, Ramsar sites, mangroves and coral reefs are asked together because they sit at the junction of hydrology, biodiversity, disaster-risk reduction and climate adaptation.

• Wetland core idea: A wetland is an area where water is the controlling factor for soil, vegetation and animal life; it may be natural or human-made, permanent or temporary, freshwater, brackish or saline.
• Ramsar definition is wider than a lake: Under the Ramsar Convention, wetlands include marshes, peatlands, floodplains, lakes, rivers, estuaries, deltas, tidal flats, mangroves, coral reefs and even marine areas up to 6 metres deep at low tide.
• UPSC trap: Every Ramsar site is a wetland of international importance, but every important Indian wetland is not automatically a Ramsar site; designation follows Ramsar criteria and national nomination.
• Mangroves as wetland forests: Mangroves are salt-tolerant intertidal plant communities in deltas, estuaries, creeks and sheltered coasts. They link land, river and sea, so they are governed by wetland, forest, wildlife and coastal-zone rules.
• Coral reefs as marine wetlands: Coral reefs are living calcium-carbonate structures built mainly by coral polyps with symbiotic algae. In India they occur chiefly around the Gulf of Kachchh, Gulf of Mannar, Lakshadweep, Andaman and Nicobar Islands, and Malvan.
• Why this is high-weight: Prelims often turns this cluster into statement traps on definitions, legal coverage, Ramsar criteria, excluded wetlands under Indian rules, CRZ-I A categories, Montreux Record, and latest site counts.
• Functional link: Wetlands store and filter water; mangroves reduce storm-surge energy and bind sediments; coral reefs support fisheries and buffer waves; together they form India’s blue-green natural infrastructure.
• Conservative current fact: MoEFCC’s Ramsar list dated 21 April 2026 records 99 Ramsar sites in India, covering about 13.84 lakh hectares. Use the date with the number because additions change frequently.
• Adjacent topics: This note directly connects with biodiversity hotspots, protected areas, climate change adaptation, EIA, coastal regulation, invasive species, water pollution and disaster management.