UPSC Relevance
- GS 1 (Geography): Coastal landforms, sea-level rise, and human-environment interactions
- GS 2 (Governance): CRZ regulations, environmental governance, and community participation
- GS 3 (Environment & Ecology): Blue carbon ecosystems, biodiversity hotspots, mangroves in climate mitigation and disaster management
- Current Affairs: MISHTI scheme (2023), IUCN Red List of Mangrove Ecosystems, Global Mangrove Alliance
- Essay & Ethics: Sustainable development, ecological justice, balancing conservation with livelihoods
Mangrove forests are among the most productive and valuable ecosystems on Earth. They serve as natural barriers against coastal erosion, provide breeding grounds for marine biodiversity, and are highly efficient in carbon sequestration. Despite these benefits, they are under severe threat from deforestation, aquaculture, urban expansion, and climate change. The IUCN Red List warns that 50% of global mangrove ecosystems are at risk of collapse, underscoring the urgency of conservation efforts.
Importance of Mangroves
- Coastal Protection: Absorb wave energy, reduce storm surges, stabilize coastlines.
- Carbon Sequestration: Store 3–5 times more carbon than terrestrial forests.
- Biodiversity Hotspots: Nurseries for fish, crabs, shrimps; habitats for Bengal tiger and crocodiles.
- Livelihoods: Fisheries, honey collection, eco-tourism.
- Water Filtration: Trap pollutants and protect coral reefs and seagrass.
Global Threats
- Deforestation for aquaculture, agriculture, and urbanization.
- Rising sea levels, ocean acidification, and erratic rainfall.
- Oil spills, chemical runoff, plastic waste.
- Unsustainable wood harvesting.
- Invasive species outcompeting native mangroves.
IUCN Red List Findings
- 50% of global mangroves threatened (VU/EN/CR).
- High-risk countries: Indonesia, India (Sundarbans), Nigeria, Brazil.
- Urgent need for conservation and restoration.
Global Initiatives
- Global Mangrove Alliance (GMA): Restore 15 million hectares by 2030.
- Global Mangrove Watch (GMW): Real-time monitoring with satellites and drones.
- Blue Carbon Initiative: Carbon markets for mangrove restoration.
- Mangrove Action Project (MAP): Community-based conservation.
India’s Conservation Efforts
- Extent: 4,992 sq. km mangroves (ISFR 2021), with 17 sq. km net increase.
- Major States: West Bengal, Gujarat, Andaman & Nicobar, Odisha, Maharashtra, Andhra Pradesh, Tamil Nadu.
- Policies:
- Forest Conservation Act, 1980
- Coastal Regulation Zone, 2011
- National Mangrove Conservation Programme (1987)
- Ramsar Sites: Sundarbans, Bhitarkanika, Gulf of Kutch
- MISHTI (2023): Restore degraded mangroves, enhance carbon storage, link livelihoods with eco-tourism.
Roadblocks and Challenges
- Urban expansion, ports, and tourism projects.
- Shrimp farming in Andhra Pradesh and Tamil Nadu.
- Oil spills and industrial waste in coastal states.
- Climate risks: sea-level rise in Sundarbans.
- Weak enforcement of CRZ and encroachment issues.
- Low awareness and limited local participation.
The Road Ahead
- Stronger enforcement of laws.
- Eco-friendly aquaculture practices.
- Community-based conservation.
- GIS, drone, and satellite-based monitoring.
- CSR and private-sector partnerships.
- Awareness campaigns and education.
Conclusion
Mangroves act as natural shields against disasters, vital carbon sinks, and biodiversity hotspots. India’s conservation programs like NMCP and MISHTI have shown progress, but challenges of enforcement, aquaculture, and pollution remain. Globally, blue carbon markets and alliances are crucial. For UPSC, mangroves are central to the themes of climate action, biodiversity, and sustainable development.