Mangrove ecosystems are India’s most cost-effective coastal infrastructure. Examine their distribution, ecological role and the policy regime that protects them.
Subtopic: Biogeography · Coastal Ecosystems
How to structure your answer
Introduction: India has 4,992 sq km of mangrove cover as per India State of Forest Report 2021, distributed mainly along the east coast deltas, west coast estuaries and Andaman-Nicobar Islands.
Body — three dimensions: (1) Distribution: Sundarbans (West Bengal, 2,114 sq km) — world's largest contiguous mangrove forest; Bhitarkanika (Odisha, Brahmani-Baitarani delta) — saltwater crocodile habitat; Pichavaram (Tamil Nadu); Gulf of Kutch (Gujarat); Mahanadi delta. (2) Ecological role: coastal bio-shield reducing wave energy by up to 66% (NRSC studies post-2004 tsunami); carbon sequestration 3–5 times tropical forests (blue carbon); fish nursery for over 250 commercial species; livelihood for fishers, honey collectors. (3) Protection regime: Coastal Regulation Zone 2019 categorises mangroves as CRZ-IA (no-development); Mangroves for the Future programme; MISHTI scheme launched February 2023 to restore 540 sq km by 2027–28; participation in Mangrove Alliance for Climate (COP-27). Threats: shrimp aquaculture, urban expansion (Mumbai), sea-level rise.
Conclusion: Mangroves protect 7,500 km of Indian coastline at a fraction of the cost of engineered sea walls; their integration into CRZ enforcement is overdue.
Written within the word limit
139 words · target 150 words · 9 min
Introduction: India holds 4,992 sq km of mangrove cover (ISFR 2021), spread across east-coast deltas, west-coast estuaries and the Andaman-Nicobar Islands — its most cost-effective natural coastal infrastructure.
Body: The Sundarbans (West Bengal, 2,114 sq km) form the world's largest contiguous mangrove belt and a Royal Bengal Tiger habitat; Bhitarkanika (Odisha) shelters saltwater crocodiles and Olive Ridley nesting at Gahirmatha; Pichavaram (Tamil Nadu), Gulf of Kutch and the Mahanadi delta complete the network. NRSC analysis after the 2004 tsunami showed wave-energy reduction up to 66%; blue-carbon sequestration is 3–5 times that of tropical forests; over 250 commercial fish species use mangroves as nurseries. CRZ 2019 categorises mangroves as CRZ-IA (no-development); MISHTI (1 February 2023) targets 540 sq km restoration by 2027–28; India joined the Mangrove Alliance for Climate at COP-27.
Conclusion: Mangroves defend 7,500 km of coast at a fraction of sea-wall cost — CRZ-IA enforcement against shrimp aquaculture and urban encroachment is overdue.
What an examiner expects to see
- Mangrove cover 4,992 sq km, ISFR 2021
- Sundarbans 2,114 sq km, world's largest contiguous mangrove
- Bhitarkanika in Odisha — saltwater crocodile habitat
- Wave energy reduction up to 66% (NRSC)
- Blue carbon — 3–5x sequestration over tropical forests
- CRZ 2019 classifies mangroves as CRZ-IA
- MISHTI scheme launched 1 February 2023
- 540 sq km target by 2027–28
- Mangrove Alliance for Climate, COP-27
Concrete cases, schemes and judgments
- Sundarbans biosphere reserve, Royal Bengal Tiger habitat
- Bhitarkanika — Olive Ridley turtle nesting at Gahirmatha
- Pichavaram in Tamil Nadu
- Gulf of Kutch (Marine National Park)
- Mumbai mangroves under Bombay HC supervision