GS3 Environment & Bio-diversity
The Vital Role of Mangroves in Climate Adaptation
Exploring how mangroves and marine ecosystems outperform seawalls in protecting India's coastline from climate risks
4 mins read
When Cyclone Dana made landfall near Bhitarkanika in Odisha, coastal mangroves provided a natural shield against climate impacts. This highlighted the growing importance of Ecosystem-Based Adaptation (EbA)—an approach that uses ecosystems and biodiversity to help communities adapt to climate change while supporting livelihoods and ecological health.
Why Coastal Adaptation Matters
India's coastline stretches over 11,000 km and supports nearly 250 million people.
Major climate threats include:
- Sea-level rise
- Saline intrusion
- Stronger cyclones
- Storm surges
- Coastal erosion
These hazards threaten:
- Human settlements
- Fisheries
- Agriculture
- Tourism
- Coastal ecosystems
Climate Change
↓
Sea-Level Rise + Cyclones
↓
Coastal Vulnerability
↓
Need for Adaptation
In this context, EbA offers a sustainable pathway to climate resilience.
What is Ecosystem-Based Adaptation?
"EbA uses biodiversity and ecosystem services to help people adapt to climate change."
Natural ecosystems function as protective barriers while generating ecological and economic benefits.
Key Coastal EbA Ecosystems
| Ecosystem | Adaptation Function |
|---|---|
| Mangroves | Reduce storm surge impacts |
| Seagrass Meadows | Stabilise sediments and store carbon |
| Coral Reefs | Dissipate wave energy |
| Coastal Wetlands | Absorb floodwaters |
These ecosystems help reduce climate risks while sustaining local livelihoods.
India's Preference for Grey Infrastructure
Despite the benefits of EbA, adaptation efforts continue to favour engineered structures.
Common Grey Infrastructure
- Seawalls
- Groynes
- Embankments
- Tetrapods
| Adaptation Approach | Characteristics |
|---|---|
| Grey Infrastructure | Visible, engineered, expensive |
| EbA | Natural, multifunctional, sustainable |
Over the last decade:
| Indicator | Amount |
|---|---|
| Spending on Hard Protection Measures | ₹2,641 crore |
| National Coastal Mission Budget (2022-23) | ₹195 crore |
| National Coastal Mission Budget (2024-25) | ₹50 crore |
This demonstrates a strong policy preference for engineered solutions.
Limitations of Hard Infrastructure
Grey measures remain useful, particularly in densely populated urban areas.
However, challenges include:
- High maintenance costs
- Ecological disruption
- Transfer of risks to nearby areas
Example: Kerala Coast
Seawall Construction
↓
Protection of One Stretch
↓
Increased Erosion Nearby
In several locations, coastal armouring has protected specific sites while accelerating erosion in adjacent regions.
India's Untapped Natural Asset
Research identifies India as a global hotspot for coastal EbA.
A notable advantage:
"India's mangroves protect more people per hectare than almost any other country."
Yet these ecosystems remain underutilised within adaptation planning.
Success Story: Sundarbans Mangrove Restoration
The Sundarbans demonstrate the practical benefits of EbA.
Outcomes
| Indicator | Achievement |
|---|---|
| Women Involved | 18,000+ |
| Mangroves Restored | 4,600 hectares |
| Cyclones Mitigated | Amphan and Yaas |
Additional livelihood benefits included:
- Honey collection
- Crab farming
- Community income generation
Mangrove Restoration
↓
Cyclone Protection
+
Livelihood Generation
+
Ecosystem Recovery
This illustrates the multiple co-benefits of EbA.
Why Does EbA Remain Marginal?
Several barriers limit its recognition.
Institutional Challenges
- Fragmented governance mandates
- Weak monitoring systems
- Preference for visible infrastructure projects
- Limited adaptation-specific assessment
Conceptual Challenges
The policy landscape includes multiple overlapping terms:
- Ecosystem-Based Adaptation (EbA)
- Nature-Based Solutions (NbS)
- Ecosystem-Based Coastal Adaptation (EbCA)
- Ecosystem-Based Disaster Risk Reduction (Eco-DRR)
This creates confusion regarding classification and reporting.
As a result, many adaptation interventions remain hidden within broader development or conservation programmes.
Why Classification Matters
The Mangrove Initiative for Shoreline Habitats & Tangible Incomes (MISHTI) illustrates this challenge.
MISHTI Programme
| Objective | Target |
|---|---|
| Mangrove Restoration | 540 sq km |
| States Covered | 9 |
Although designed to protect communities from climate impacts, MISHTI is primarily classified as a restoration initiative rather than an adaptation programme.
Without clear recognition:
- Adaptation outcomes remain undercounted.
- Financing opportunities are missed.
- Monitoring becomes difficult.
- Policy prioritisation weakens.
Way Forward
- Integrate EbA into national and state coastal adaptation plans.
- Develop clear definitions and classification frameworks for EbA.
- Strengthen monitoring and evaluation systems.
- Expand mangrove, seagrass, coral reef, and wetland restoration.
- Promote community-led ecosystem management.
- Increase dedicated funding for ecosystem-based adaptation.
- Align adaptation reporting with Global Goal on Adaptation frameworks.
- Combine grey and green infrastructure where appropriate.
Conclusion
India's coastal ecosystems are already functioning as powerful climate adaptation assets. Mangroves, wetlands, coral reefs, and seagrass meadows not only reduce disaster risks but also strengthen livelihoods and ecological resilience. The challenge today is not proving that ecosystem-based adaptation works, but ensuring that policy frameworks recognise, measure, finance, and scale these interventions. By placing natural capital at the centre of adaptation planning, India can build a more resilient, equitable, and sustainable coastal future.
Attribution
Original content sources and authors
Syllabus classification
How this article maps to GS papers
Main syllabus
GS3Environment & Bio-diversityQuick Q&A
What is Ecosystem-based Adaptation and why is it emerging as a significant strategy for climate resilience along India's coastline?
Ecosystem-based Adaptation (EbA) refers to the use of biodiversity and ecosystem services to help communities adapt to the adverse impacts of climate change. It integrates conservation, restoration and sustainable management of ecosystems to reduce vulnerability while simultaneously supporting livelihoods and ecological health. Coastal ecosystems such as mangroves, seagrass meadows, wetlands and coral reefs function as natural buffers against cyclones, storm surges, sea-level rise and saline intrusion.
India possesses an approximately 11,000-kilometre coastline, supporting nearly 250 million people whose lives and livelihoods are increasingly threatened by climate change. Scientific studies identify India as a global hotspot for coastal EbA, with mangrove ecosystems protecting more people per hectare than in most other countries. The protective role of mangroves during Cyclone Dana near Bhitarkanika and the reduced impacts of Cyclones Amphan and Yaas in the Sundarbans demonstrate the effectiveness of EbA.
Unlike conventional engineering measures, EbA generates multiple co-benefits. It supports fisheries, tourism, agriculture, carbon sequestration and biodiversity conservation. Restoration activities in the Sundarbans involving more than 18,000 women and 4,600 hectares of mangroves also strengthened local livelihoods through honey collection and crab farming.
For UPSC GS-III (Environment and Disaster Management), EbA is important because it links biodiversity conservation, climate adaptation, sustainable development and community participation. It also aligns with international climate commitments and illustrates how natural capital can serve as an equitable and resilient defence mechanism against future climate risks.
Why is ecosystem-based adaptation considered important for India's climate policy and for UPSC aspirants studying environmental governance?
Ecosystem-based Adaptation has become increasingly important because climate change is no longer a distant threat but a lived reality for millions residing in India's coastal regions. Rising sea levels in the Arabian Sea and Bay of Bengal, increasing cyclonic intensity, saline intrusion and coastal erosion have created complex challenges that require sustainable and economically viable responses.
EbA is significant because it simultaneously addresses adaptation, biodiversity conservation and socio-economic development. Healthy mangroves, wetlands and coral reefs reduce disaster risks while supporting fisheries, agriculture and tourism. Such multiple benefits make EbA more sustainable than many single-purpose infrastructure projects.
From a policy perspective, EbA aligns with India's commitments under the Paris Agreement, the Convention on Biological Diversity and the Sustainable Development Goals. It also contributes to the Global Goal on Adaptation, which emphasises measuring adaptation outcomes and resilience-building. However, despite its effectiveness, adaptation financing has favoured hard infrastructure. Coastal States spent approximately ₹2,641 crore on engineered structures over the last decade, whereas the National Coastal Mission's budget declined from ₹195 crore in 2022-23 to ₹50 crore in 2024-25.
For UPSC aspirants, the topic is relevant to GS-III Environment, Disaster Management, Economy and Governance. Questions may examine climate resilience, nature-based solutions and sustainable development. Debates also arise regarding balancing grey infrastructure with ecological approaches. Understanding EbA enables candidates to provide multidimensional answers incorporating economic efficiency, environmental sustainability and social justice, which are highly valued in Mains and Personality Test discussions.
How do ecosystem-based adaptation measures function differently from conventional hard infrastructure in managing coastal risks?
Ecosystem-based Adaptation and conventional engineering solutions differ fundamentally in their approach to risk management. Hard infrastructure measures such as seawalls, groynes, embankments and tetrapods are designed to provide physical barriers against waves, flooding and erosion. While effective in high-density urban regions, they are often expensive to construct and maintain and may transfer risks to neighbouring areas.
EbA works through natural ecological processes. Mangroves dissipate wave energy, trap sediments and reduce storm surges. Coral reefs act as submerged barriers that weaken wave intensity, while wetlands absorb floodwaters and seagrass ecosystems stabilise sediments. These systems evolve naturally and adapt over time, making them dynamic forms of protection.
The example of Kerala illustrates the limitations of hard engineering. Coastal armouring protected selected stretches but accelerated erosion in adjacent areas, highlighting the problem of risk displacement. In contrast, the Sundarbans demonstrated how mangrove restoration mitigated cyclone impacts while generating livelihood opportunities.
EbA also contributes to carbon sequestration, biodiversity conservation and food security. However, experts acknowledge that grey infrastructure remains necessary in densely populated urban centres. Therefore, an integrated approach combining grey and green infrastructure is increasingly advocated.
From a UPSC perspective, this issue intersects GS-III topics such as Environment, Disaster Management and Infrastructure. It also reflects the broader debate between development and ecological sustainability. Policymakers are now promoting hybrid models where engineered structures complement ecosystem restoration, thereby creating resilient and cost-effective adaptation strategies suitable for long-term climate challenges.
What are the major reasons behind the underutilisation and limited recognition of ecosystem-based adaptation in India?
Despite its proven effectiveness, Ecosystem-based Adaptation remains underutilised in India due to institutional, financial and conceptual challenges. One major reason is the preference for visible infrastructure projects. Policymakers and administrators often favour seawalls and embankments because they provide tangible and politically visible outcomes, whereas ecological interventions produce benefits that are less immediately apparent.
Another challenge is fragmented governance. Different ministries and agencies manage forests, fisheries, coastal zones and climate policy, resulting in overlapping mandates and poor coordination. Weak monitoring mechanisms further limit the ability to assess adaptation outcomes.
Conceptual ambiguity also creates barriers. Terms such as Nature-based Solutions (NbS), Ecosystem-based Coastal Adaptation (EbCA) and Ecosystem-based Disaster Risk Reduction (Eco-DRR) overlap with EbA. This creates uncertainty regarding classification and reporting. Consequently, many ecosystem interventions are implemented under conservation or restoration schemes without explicitly acknowledging their climate adaptation benefits.
Financial prioritisation presents another obstacle. While coastal States allocated around ₹2,641 crore for hard infrastructure over the past decade, funding for the National Coastal Mission declined substantially between 2022-23 and 2024-25. This imbalance limits the scaling up of ecosystem-based initiatives.
Political economy considerations and short-term planning horizons further hinder adoption. Some experts also point to the absence of robust valuation techniques for ecosystem services.
For UPSC GS-III and Governance, this issue highlights challenges of policy implementation, inter-agency coordination and climate finance. Addressing these barriers requires institutional reforms, improved monitoring frameworks and stronger integration of ecological approaches into India's climate adaptation strategy.
What lessons do the Sundarbans and MISHTI programme provide regarding ecosystem-based adaptation and biodiversity conservation in India?
The Sundarbans and the Mangrove Initiative for Shoreline Habitats and Tangible Incomes (MISHTI) programme provide important case studies demonstrating the practical value of Ecosystem-based Adaptation in India.
In the Sundarbans, more than 18,000 women participated in restoring approximately 4,600 hectares of mangrove forests. These restored ecosystems played a crucial role in reducing the impacts of Cyclones Amphan (2020) and Yaas (2021). Besides disaster mitigation, the initiative generated livelihood opportunities through activities such as honey collection and crab farming. Thus, the Sundarbans illustrate how ecological restoration can simultaneously promote climate resilience, gender empowerment and rural development.
The MISHTI programme, announced by the Government of India, aims to restore around 540 square kilometres of mangroves across nine States. Although its primary framing is ecological restoration, the programme has significant climate adaptation benefits because mangroves reduce storm surges, minimise coastal erosion and support fisheries.
These examples demonstrate that adaptation and conservation should not be viewed as separate objectives. Instead, they reinforce each other. However, experts argue that many such programmes are inadequately classified as EbA, leading to underestimation of their contribution to climate resilience.
For UPSC preparation, these case studies are relevant to GS-III Environment, Disaster Management and Inclusive Development. They also illustrate themes such as women-led development, sustainable livelihoods and community participation. Such examples are useful in essay papers and interview discussions where candidates are expected to combine theory with practical evidence and policy outcomes.
Critically analyse the debate between grey infrastructure and ecosystem-based adaptation in achieving coastal resilience in India.
The debate between grey infrastructure and Ecosystem-based Adaptation reflects differing approaches to climate resilience. Grey infrastructure includes seawalls, groynes, embankments and tetrapods that provide immediate and targeted protection. These measures are particularly important in densely populated urban areas and industrial zones where the value of assets is extremely high.
Supporters of engineered solutions argue that they offer predictable performance and can be implemented relatively quickly. However, critics point out that such structures are expensive, require continuous maintenance and often create unintended consequences. Kerala's experience shows that hard armouring protected specific areas while accelerating erosion in neighbouring stretches.
On the other hand, EbA provides long-term resilience through natural systems such as mangroves, wetlands and coral reefs. These ecosystems reduce storm surges, support biodiversity and enhance livelihoods. They also contribute to carbon sequestration and ecosystem services. Nevertheless, EbA has limitations. Ecosystem restoration requires time, suitable ecological conditions and effective community participation. In certain highly urbanised settings, ecological measures alone may not be sufficient.
Therefore, many experts advocate hybrid solutions that combine green and grey infrastructure. Such integrated approaches maximise resilience while minimising ecological damage and economic costs.
From a UPSC perspective, the issue represents a classic development-versus-environment debate involving economics, governance and sustainability. It connects with GS-III topics on infrastructure, environment and disaster management, while also raising questions of climate justice and intergenerational equity. A balanced policy framework rather than an exclusive reliance on either approach appears to be the most practical way forward for India's coastal adaptation strategy.
Why does proper classification and measurement of ecosystem-based adaptation matter for India's climate governance and adaptation finance framework?
Proper classification and measurement of Ecosystem-based Adaptation are essential because they determine how adaptation efforts are recognised, financed and evaluated. Although numerous ecosystem restoration projects are underway in India, many are categorised under conservation or development schemes rather than being explicitly identified as climate adaptation initiatives. This leads to underreporting of their actual contribution to resilience-building.
The policy landscape contains overlapping concepts such as Nature-based Solutions, Ecosystem-based Coastal Adaptation and Ecosystem-based Disaster Risk Reduction. Such terminological confusion complicates monitoring and creates uncertainty regarding what qualifies as EbA. Consequently, adaptation outcomes are often not separately measured.
This issue has gained importance because of the renewed emphasis on the Global Goal on Adaptation under international climate negotiations. Countries are increasingly expected to demonstrate measurable progress in adaptation planning and implementation. Without standardised classification systems, India risks undercounting some of its most effective climate responses.
Clear recognition also has financial implications. Better classification facilitates access to domestic and international climate finance and helps policymakers assess socio-economic benefits more accurately. It strengthens evidence-based planning and improves accountability.
From the perspective of governance, proper classification encourages inter-sectoral coordination and mainstreaming of EbA into coastal planning. It also supports better evaluation of programmes such as MISHTI.
For UPSC aspirants, this topic links GS-III Environment with Governance and International Relations. It highlights how terminology, data systems and institutional frameworks influence public policy outcomes. Ultimately, effective measurement is crucial for transforming dispersed ecological projects into a coherent and scalable climate adaptation strategy.
Practice questions
1 question for mains preparation