06 · GS-III: Environment, Marine Mammals & Coastal Biodiversity
Dugong Conservation and Seagrass Meadows: Gulf of Mannar Dugong Reserve, Coastal Trawling and Carbon Sequestration
NEWS PEG
- The Tamil Nadu Forest Department and Wildlife Institute of India (WII) released a telemetry monitoring report from India's first Dugong Conservation Reserve in the Palk Bay, recording a stable population of over 150 Dugongs (Dugong dugon).
- The report emphasized that protecting seagrass meadows (the exclusive food source for herbivorous dugongs) provides massive blue carbon benefits, sequestering carbon up to 35 times faster than tropical rainforests.
- Coastal fisheries authorities implemented strict acoustic pinger regulations and seasonal bans on mechanized bottom-trawling to prevent dugong mortality from propeller strikes and accidental gill-net entanglements.
STATIC FOUNDATION
- Dugong (Dugong dugon - 'Sea Cow'): Only existing strictly herbivorous marine mammal; feeds exclusively on marine seagrasses; listed as Vulnerable (IUCN Red List), Schedule I of Wildlife (Protection) Act, 1972, and Appendix I of CITES.
- Distribution in India: Found in Gulf of Mannar, Palk Bay, Gulf of Kachchh, and Andaman and Nicobar Islands.
- Palk Bay Dugong Conservation Reserve (2022): India's first dedicated dugong reserve covering 448 sq km of coastal waters in Thanjavur and Pudukkottai districts of Tamil Nadu.
- Seagrass Ecosystem Services: Marine flowering plants that form dense underwater meadows; act as fish nursery grounds, stabilize coastal seabed sediments, and store up to 10% of the ocean's total carbon pool (Blue Carbon).
PRELIMS TRAP & PYQ BRIDGE
MAINS ENHANCEMENT
- Marine Habitat Restoration: Reviving Degraded Seagrass Meadows — Eliminating destructive bottom-trawling in shallow coastal bays to restore marine foraging grounds.
- Community-Led Marine Stewardship: Incentivizing Artisanal Fisherfolk — Providing cash compensation to fishermen who rescue and safely release entangled dugongs from fishing nets.
- Blue Carbon Monetization: Integrating Seagrass Meadows into National NDC Targets — Quantifying coastal wetland carbon stocks for international climate financing.