Mangroves’ ₹2,485 crore value: UPSC’s key ecosystem service insight

03 Sep Mangroves’ ₹2,485 crore value: UPSC’s key ecosystem service insight

✎ Mangrove ecosystems provide a Total Economic Value (TEV) of ₹2,485.38 crore in the Pichavaram case, with soil organic carbon alone accounting for ₹1,224.63 crore, underscoring their irreplaceable role in climate regulation…

Subject Relevance — Where This Topic Fits

• GS Paper III — Environment, Ecology, Biodiversity and Climate Change  |  GS Paper III — Economic and Sustainable Development  |  GS Paper IV — Environmental Ethics and Governance
• Prelims: Mangrove ecosystems, Blue carbon, Ecosystem services valuation, Carbon sequestration, Coastal protection, Wetland conservation, Pichavaram Mangrove Forest, Red List of Ecosystems, IUCN assessment
• Essay: The intrinsic and instrumental value of natural ecosystems in sustainable development, Balancing economic development with ecological conservation in coastal regions

Quick Revision: Mangrove ecosystems provide a Total Economic Value (TEV) of ₹2,485.38 crore in the Pichavaram case, with soil organic carbon alone accounting for ₹1,224.63 crore, underscoring their irreplaceable role in climate regulation, coastal protection, and biodiversity conservation.

Why is this in the news?

A recent study titled *Economic Valuation and Blue Carbon Assessment of Ecosystem Services in the Pichavaram Mangrove Forest* has quantified the Total Economic Value (TEV) of the Pichavaram Mangrove Ecosystem at ₹2,485.38 crore, highlighting its critical role in biodiversity conservation, climate regulation, fisheries productivity, and livelihood security. The study underscores the undervaluation of non-market ecological services in conventional development planning and emphasizes the need for comprehensive assessment of mangrove ecosystems amid escalating climate change impacts and coastal vulnerability.

Background

• Mangrove ecosystems are coastal wetlands that thrive in saline or brackish water, forming a unique and highly productive interface between terrestrial and marine environments.
• India hosts some of the world’s most extensive mangrove forests, with the Sundarbans, Bhitarkanika, and Pichavaram being ecologically significant.
• Mangroves provide a range of ecosystem services, including provisioning (e.g., fish, crabs, timber), regulating (e.g., coastal protection, carbon sequestration), supporting (e.g., nutrient cycling, biodiversity conservation), and cultural services (e.g., tourism, recreation).
• The International Union for Conservation of Nature (IUCN), in its 2024 global assessment, classified 50% of the world’s mangrove ecosystems as at risk of collapse due to climate change, coastal development, and anthropogenic pressures.
• The study was funded by the Deputy Conservator of Forests, Forest Genetics D.

What are Mangrove Ecosystems and their Ecosystem Services?

• Mangroves are salt-tolerant, woody plants that grow in coastal intertidal zones, forming dense forests that stabilize shorelines and protect coasts from erosion, storms, and tsunamis.
• They act as natural barriers, reducing the impact of cyclones and storm surges, thereby safeguarding coastal communities and infrastructure.
• Mangroves are among the most carbon-dense forests globally, with their soils storing significant amounts of carbon (blue carbon), which is crucial for climate regulation and mitigation of greenhouse gas emissions.
• Ecosystem services provided by mangroves include: provisioning services (e.g., fisheries, timber, honey), regulating services (e.g., water purification, flood control), supporting services (e.g., nutrient cycling, habitat provision), and cultural services (e.g., tourism, spiritual value).
• The study’s Total Economic Value (TEV) of ₹2,485.38 crore for Pichavaram includes provisioning services (₹3.47 crore), coastal protection (₹147.17 crore), nutrient cycling (₹10.53 crore), oxygen regulation (₹181.22 crore), carbon sequestration (₹26.86 crore), biodiversity conservation (₹19.48 crore), recreational value (₹484.25 crore), carbon stock (₹387.77 crore), and soil organic carbon (₹1,224.63 crore).
• Mangroves are critical for blue carbon sequestration, with their soils storing carbon for centuries, making them vital for climate change mitigation strategies.
• The economic valuation of mangroves challenges conventional development paradigms by highlighting the non-market benefits of ecosystems that are often overlooked in policy and planning.

Key Features

Ecosystem Service	Economic Value (₹ crore)
Provisioning services (Fish, Crab, Shrimp)	3.47
Coastal protection function	147.17
Nutrient cycling	10.53
Oxygen regulation	181.22
Carbon sequestration (annual flow)	26.86
Biodiversity conservation	19.48
Recreational and tourism value	484.25
Carbon stock value (vegetation)	387.77
Soil organic carbon	1224.63

Why it Matters

Ecological Significance

• Mangroves act as natural barriers, mitigating coastal erosion and storm surges, thereby reducing vulnerability of coastal communities to climate-induced disasters.
• They serve as critical nursery grounds for marine species, supporting fisheries productivity and biodiversity conservation in the Pichavaram ecosystem.
• Pichavaram Mangrove Forest is recognised as one of India’s most ecologically significant coastal wetland ecosystems, hosting diverse flora and fauna.
• Mangroves contribute to ‘blue carbon’ sequestration, storing atmospheric carbon in biomass and soil, thus aiding climate regulation.

Economic Significance

• The Total Economic Value (TEV) of ₹2,485.38 crore highlights the substantial economic contribution of mangroves to local and regional economies.
• Recreational and tourism value (₹484.25 crore) underscores the potential for sustainable eco-tourism, generating livelihoods for coastal communities.
• Coastal protection function (₹147.17 crore) reduces expenditure on artificial coastal defence infrastructure, offering cost-effective natural resilience.
• Carbon stock value (₹387.77 crore) and soil organic carbon (₹1224.63 crore) represent long-term climate mitigation assets with potential for carbon credit markets.

Social and Livelihood Significance

• Mangrove-dependent communities derive direct livelihoods from fisheries, crab and shrimp harvesting, and eco-tourism activities.
• The study’s primary data from 302 households across five villages illustrates the socio-economic dependence on mangrove ecosystems.
• Biodiversity conservation value (₹19.48 crore) supports traditional knowledge systems and cultural practices tied to mangrove ecosystems.

Climate Change and Policy Relevance

• Mangroves are among the most carbon-dense ecosystems globally, making their conservation critical for Nationally Determined Contributions (NDCs) under the Paris Agreement.
• The IUCN’s 2024 global assessment indicates 50% of mangrove ecosystems are at risk of collapse, necessitating urgent conservation and restoration efforts.
• Economic valuation studies like this provide evidence for integrating ecosystem services into national and sub-national climate adaptation and disaster risk reduction strategies.

Challenges

1. Climate Change Impacts

• Sea-level rise and increased frequency of cyclones threaten the structural integrity and survival of mangrove ecosystems like Pichavaram.
• Altered hydrological regimes and salinity intrusion may degrade mangrove habitats, reducing their ecological and economic value.
• Increased storm surges and coastal flooding pose risks to mangrove-dependent communities, exacerbating socio-economic vulnerabilities.

UPSC Link: GS3: Climate Change (Disaster Management)

2. Anthropogenic Pressures

• Unsustainable aquaculture, agriculture, and urban expansion encroach upon mangrove habitats, leading to habitat fragmentation and loss.
• Industrial pollution, including heavy metals and plastics, degrades water quality, affecting mangrove health and the services they provide.
• Overharvesting of mangrove resources for timber, fuelwood, and non-timber forest products reduces ecosystem resilience.

UPSC Link: GS3: Environmental Pollution (Conservation)

3. Institutional and Governance Challenges

• Limited awareness among policymakers and local communities about the economic and ecological value of mangroves hinders effective conservation.
• Fragmented governance across multiple agencies (e.g., forest departments, coastal zone management authorities) complicates integrated management.
• Insufficient funding and technical capacity for mangrove restoration and monitoring programmes constrain conservation efforts.

UPSC Link: GS2: Governance (Institutional Mechanisms)

4. Market and Policy Failures

• Non-market nature of many ecosystem services (e.g., carbon sequestration, nutrient cycling) leads to undervaluation in development planning and policy.
• Absence of robust valuation frameworks for ecosystem services in national accounting systems (e.g., GDP) undermines their recognition in economic decision-making.
• Limited integration of mangrove conservation into national climate finance mechanisms (e.g., Green Climate Fund, National Adaptation Fund).

UPSC Link: GS3: Economic Development (Sustainable Development)

Challenges — UPSC Perspective

Challenge	Concern
Climate change impacts	Increased sea-level rise and storm surges threaten mangrove survival and coastal protection services.
Habitat degradation	Anthropogenic pressures such as aquaculture, pollution, and urbanisation reduce mangrove extent and functionality.
Institutional fragmentation	Overlapping mandates among agencies hinder coordinated conservation and management efforts.
Economic undervaluation	Non-market ecosystem services are not adequately reflected in policy and development planning.
Limited funding	Insufficient financial resources for restoration, monitoring, and community livelihood programmes.
Policy gaps	Lack of integration of mangrove conservation into climate adaptation and disaster risk reduction strategies.

Way Forward

• Integrate mangrove ecosystem services into national and state-level climate adaptation and disaster risk reduction plans, leveraging economic valuation data.
• Strengthen multi-stakeholder governance frameworks to address fragmentation, including coordination between forest departments, coastal zone authorities, and local communities.
• Expand funding mechanisms for mangrove conservation, including public-private partnerships, carbon credit markets, and international climate finance.
• Promote sustainable livelihood programmes for mangrove-dependent communities, such as eco-tourism, non-timber forest product certification, and alternative income generation.
• Enhance monitoring and research on mangrove ecosystems, utilising remote sensing, community-based monitoring, and carbon stock assessments.
• Develop and implement mangrove restoration and afforestation programmes in degraded areas, prioritising climate-resilient species.
• Raise awareness among policymakers, practitioners, and the public about the economic, ecological, and social value of mangroves through targeted education and outreach.
• Align national policies (e.g., National Mangrove Management Plan, Coastal Regulation Zone notifications) with international commitments (e.g., UN Sustainable Development Goals, Paris Agreement).

UPSC Value Addition

Prelims Practice Questions

Q1. Consider the following statements regarding mangrove ecosystems:
1. Mangroves primarily provide provisioning services such as fish, crab, and shrimp.
2. The Pichavaram Mangrove Forest in India has been assessed to have a Total Economic Value of ₹2,485.38 crore.
3. Mangroves contribute significantly to carbon sequestration, termed as ‘blue carbon’.
4. The IUCN Red List of Ecosystems classifies 50% of global mangrove ecosystems as stable and secure.
How many of the above statements are correct?

1. Only one
2. Only two
3. Only three
4. All four

Answer: Only three — Statements 1, 2, and 3 are correct. Statement 4 is incorrect as the IUCN assessment indicates that 50% of mangrove ecosystems are at risk of collapse, not stable and secure.

Q2. Assertion (A): The economic valuation of ecosystem services, such as those provided by mangroves, often remains undervalued in conventional development planning.
Reason (R): Many ecological benefits are non-market in nature and are not reflected in market transactions.
Options:
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true.

Answer: ? — Both the assertion and reason are true, and the reason correctly explains the assertion. Non-market ecological benefits are often excluded from conventional economic assessments.

Q3. Match the following ecosystem services provided by mangroves with their corresponding categories:
Column I (Ecosystem Service)
1. Fish, crab, and shrimp
2. Coastal protection
3. Carbon sequestration
4. Recreational and tourism value

Column II (Category)
A. Provisioning services
B. Regulating services
C. Supporting services
D. Cultural services

Options:
A. 1-A, 2-B, 3-C, 4-D
B. 1-A, 2-B, 3-B, 4-D
C. 1-C, 2-B, 3-A, 4-D
D. 1-A, 2-C, 3-B, 4-D

Answer: ? — 1-A (Provisioning services), 2-B (Regulating services), 3-B (Regulating services), 4-D (Cultural services).

Mains Practice Question

✍ Critically examine the role of mangrove ecosystems in climate change mitigation and coastal resilience. Substantiate your answer with reference to the economic valuation of ecosystem services, citing the Pichavaram Mangrove Forest case study. Also, discuss the implications of their degradation for coastal communities and biodiversity. (15 Marks)

Approach: MODEL-ANSWER SKELETON:

1. **Introduction (2 Marks)**
– Define mangrove ecosystems and their global distribution.
– Highlight their classification under ‘blue carbon’ ecosystems.

2. **Climate Change Mitigation (4 Marks)**
– Explain carbon sequestration and storage mechanisms in mangroves (e.g., soil organic carbon, vegetation carbon stock).
– Cite the Pichavaram study: Total Economic Value (₹2,485.38 crore) and per-hectare value (₹1.83 crore).
– Reference the IUCN Red List of Ecosystems (50% of global mangroves at risk of collapse).

3. **Coastal Resilience and Ecosystem Services (4 Marks)**
– List and explain key ecosystem services: provisioning (fisheries), regulating (coastal protection, nutrient cycling), supporting (biodiversity), and cultural (recreation).
– Use Pichavaram data: coastal protection (₹147.17 crore), oxygen regulation (₹181.22 crore), biodiversity conservation (₹19.48 crore).

4. **Implications of Degradation (3 Marks)**
– Discuss impacts on coastal communities: livelihoods, food security, and vulnerability to sea-level rise.
– Highlight biodiversity loss and ecosystem collapse risks.
– Link to broader climate adaptation and sustainable development goals.

5. **Conclusion (2 Marks)**
– Emphasise the need for integrated coastal zone management and conservation policies.
– Suggest measures: community-based conservation, blue carbon financing, and ecosystem-based adaptation.

Source: The Hindu

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