Tamil Nadu's Mangrove Restoration Efforts

On July 26, 2025, which marks World Mangrove Day, Environment and Climate Change Minister Thangam Thennarasu initiated the planting of mangrove saplings at the Adyar estuary in Chennai, Tamil Nadu. This initiative forms part of the state's broader strategy to combat climate challenges and protect its extensive coastline.

Key Points:

• World Mangrove Day: Celebrated annually on July 26. The observation began to raise awareness of the necessity and benefits of mangroves.

• Mangrove Planting and Restoration: Since 2022, Tamil Nadu has effectively planted and restored over 2,900 hectares of mangroves across nine coastal districts to mitigate the impacts of cyclones, tidal surges, erosion, and to bolster biodiversity and local economies.

• Geographical Context: Tamil Nadu's coastline stretches 1,076 kilometers across 14 districts, increasingly becoming vulnerable to climate-related risks.

• Government Initiatives:

  • In February 2023, the government rolled out a three-year Mangrove Restoration Scheme with an allocation of ₹25 crore. This initiative focuses on both planting new mangroves and rehabilitating degraded mangrove areas.
  • The scheme will run until 2026, targeting ten districts that encompass both forest and revenue lands conducive for mangrove growth.

• Planting Statistics:

  • In the first year (2022-23), 1,181.4 hectares were planted, with significant efforts centered in Thiruvarur, Nagapattinam, Mayiladuthurai, and Thoothukudi, alongside the restoration of 200 hectares of degraded mangroves, mostly in Thiruvarur.
  • The following year (2023-24) saw the addition of 720 hectares of new plantations and the restoration of 732 hectares.
  • For 2024-25, a further 275 hectares are expected to be planted.

• Planting Techniques: Innovative techniques employed in the planting process include:

  • Linear planting of propagules.
  • Intertidal nursery cultivation.
  • Modified fish-bone planting patterns intended to maximize seedling survival.

• Focus on Rare Species: The restoration initiative emphasizes reintroducing rare mangrove species such as Sonneratia apetala, Xylocarpus granatum, and Kandelia candel, which had dwindled in population in the region.

• Bio-Shield Plantations: The initiative includes the establishment of bio-shield plantations comprising trees like casuarina, palmyrah, and cashew to mitigate wind and wave actions.

• Associated Programs: The mangrove plantation efforts align with several governmental initiatives including:

  • Tamil Nadu Biodiversity Conservation and Greening Project for Climate Change Response (TBGPCCR).
  • Compensatory Afforestation Fund Management and Planning Authority (CAMPA).
  • Chennai River Restoration Trust (CRRT).
  • Other centrally sponsored schemes.

• Challenges: Despite these advancements, challenges persist, particularly in districts such as Chengalpattu and Pudukkottai, where plantation activities are hampered due to ecological or hydrological issues.

This comprehensive set of initiatives demonstrates Tamil Nadu's commitment to restoring and enhancing its coastal ecosystems while addressing significant climate challenges. The state’s efforts reflect a proactive approach to safeguarding biodiversity and supporting local communities through resilience-building in the face of climate change.