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Pichavaram Mangrove Ecosystem Valued at ₹2,485 Crore in New Blue Carbon Study

A new research assessment has estimated the Total Economic Value of the Pichavaram mangrove ecosystem at ₹2,485.38 crore (approximately $289 million). With an estimated per-hectare value of ₹1.83 crore, the findings emphasize the critical ecological, monetary, and community benefits delivered by this coastal wetland forest.

What Happened

The study, titled Economic Valuation and Blue Carbon Assessment of Ecosystem Services (ESV) in the Pichavaram Mangrove Forest, was authored by M. Balasubramanian, an associate professor at the Centre for Ecological Economics and Natural Resources at the Institute for Social and Economic Change, Bengaluru. Funded by the Deputy Conservator of Forests, Forest Genetics Division, Coimbatore, the assessment utilized both primary and secondary data.

To capture direct community impacts and ecosystem reliance, field researchers collected primary data from 302 households spread across five mangrove-dependent villages: MGR Thittu, Kalaignar Nagar, Chinnavaikal, Patriadi, and Mudasalodai. The research mapped both tangible resources and non-market ecological services that are typically left out of standard development budgets.

Key Highlights

  • Total Valuation: The ecosystem’s Total Economic Value is pegged at ₹2,485.38 crore, averaging ₹1.83 crore per hectare.
  • Substantial Carbon Asset: Combined vegetation and soil pools represent a total blue carbon asset value of ₹1,612.40 crore.
  • Underground Sediments Lead: Soil organic carbon forms the largest single contributor to the valuation at ₹1,224.63 crore, holding an average of 251.14 tonnes of carbon per hectare valued at ₹90.24 lakh per hectare.
  • Vegetation Carbon: Mangrove vegetation stores an average of 79.449 tonnes of carbon per hectare (around 291.33 tonnes of CO2 equivalent per hectare), representing a carbon stock value of ₹387.77 crore.
  • Recreation and Tourism: Tourism and recreational services were estimated at ₹484.25 crore.
  • Regulating Services: The system contributes ₹181.22 crore in oxygen regulation, ₹147.17 crore in coastal protection, and ₹26.86 crore in annual carbon sequestration flows.
  • Supporting and Provisioning Roles: Biodiversity conservation was valued at ₹19.48 crore, nutrient cycling at ₹10.53 crore, and provisioning services (such as fish, crab, and shrimp harvests) at ₹3.47 crore.

Why This Matters

As noted in the study, conventional development planning regularly undervalues mangrove forests because many of their key services are non-market benefits that do not appear in regular commercial transactions. However, Pichavaram plays a crucial role in stabilizing shorelines, protecting against coastal risks, and supporting regional livelihood security.

The study’s blue carbon assessment demonstrates that the vast majority of carbon storage occurs below ground in sedimentary deposits rather than solely in above-ground branches and leaves. This evidence supports conserving entire wetland soil matrices along with standing forests. The urgency of these protections is underscored by broader conservation data; in 2024, the International Union for Conservation of Nature (IUCN) reported on its Red List of Ecosystems that 50% of the world’s mangrove ecosystems are at risk of collapse.

What to Watch Next

Based on the study’s conclusions, researchers recommended several direct policy and financial interventions for environmental planners:

  • Incorporating formal ecosystem service valuations into broader coastal development decisions and environmental planning.
  • Designing targeted blue carbon financing mechanisms, carbon credit programs, and Payment for Ecosystem Services (PES) frameworks.
  • Integrating mangrove asset values into natural capital accounting systems and Green GDP calculations.
  • Fostering community-level livelihood options through eco-tourism, sustainable fisheries, and collaborative mangrove restoration programs.
  • Developing long-term ecosystem-based management strategies to boost climate adaptation and disaster risk reduction.

Frequently Asked Questions

What is the Total Economic Value calculated for Pichavaram?

The study estimates the Total Economic Value of the Pichavaram mangrove ecosystem at ₹2,485.38 crore ($289 million), which equates to ₹1.83 crore per hectare.

Where is most of the carbon stored in the ecosystem?

Field analysis revealed that mangrove sediments store the vast majority of carbon. Soil organic carbon accounts for ₹1,224.63 crore of the total ₹1,612.40 crore blue carbon value, with an average of 251.14 tonnes of carbon per hectare.

Who conducted and funded the research?

The study was conducted by M. Balasubramanian of the Institute for Social and Economic Change, Bengaluru, and funded by the Deputy Conservator of Forests, Forest Genetics Division, Coimbatore.

Source: Based on reporting and study findings published by The Hindu.