How Blue Carbon Markets Could Quadruple Mangrove Restoration by 2075

Opening Insight

Imagine a carbon market so undervalued that its current contribution—just 2% of its potential—could expand more than fiftyfold by 2075. This is precisely the paradox of blue carbon projects: critical for climate mitigation and biodiversity, yet persistently sidelined in global carbon finance. Without systemic investment and equitable frameworks, the opportunity to restore mangroves and seagrass ecosystems at scale will remain elusive.

Blue Carbon’s Untapped Climate Potential

Blue carbon ecosystems (BCEs), including mangroves, tidal marshes, and seagrasses, occupy less than 2% of ocean surface but store over 110 gigatonnes CO₂-equivalent (GtCO₂e), matching the terrestrial forest total, and sequester 0.86–1.65 GtCO₂e annually—five times more per hectare than forests (nature.com).

As of March 2025, only 94 blue carbon projects (BCPs) were registered, covering 2 million hectares and committing to reduce just 20.4 Mt CO₂e/year. This pales when compared to the full potential: only ~2% of globally estimated mangrove restoration opportunities have been tapped (nature.com).

The astonishing scale gap—BCPs mobilizing tiny fraction of potential—is both a challenge and an opportunity: expanding their reach can meaningfully impact climate goals and coastal resilience.

Case Study 1: Mikoko Pamoja, Kenya – Community-led Success

The pioneering Mikoko Pamoja project in Gazi Bay, Kenya, launched in 2010 by local communities in partnership with Plan Vivo and ACES, protects and restores 117 hectares of mangroves. Between 2014 and 2018, it avoided 9,880 tonnes of CO₂ emissions and generated $58,591 in community benefits. Full-time stewardship roles and local infrastructure improvements were funded via carbon credit revenues (commonwealthconsultant.com).

Analysis: This grassroots initiative underscores two strengths. First, tangible carbon and financial returns are achievable at small scales. Second, transparency, local ownership, and inclusive governance are foundational to success. Yet, the scale is modest—far from the millions of hectares needed.

Case Study 2: Indigenous Co-management in the Great Barrier Reef

In Queensland, Australia, a blue carbon project combined Traditional Knowledge with scientific carbon assessments in the mangrove ecosystem of the Barron River estuary. Ceriops tagal mangroves dominated with densities of 1,000–4,400 trees per hectare. Sediments stored 69% of carbon and accumulated at 1.84 t C/ha per year respectively. Over three decades, mangrove cover remained stable, illustrating the resilience of co-managed ecosystems (sciencedirect.com).

Analysis: This initiative offers a replicable model where Indigenous stewardship and scientific rigor yield long-term ecosystem stability and high carbon accumulation, essential for scalable conservation models.

Quantitative Context: Global Blue Carbon Metrics

Global biomass carbon stock: Seagrasses store approximately 24–40 Tg C globally (~88–147 Mt CO₂e), with net primary productivity (NPP) of 83–137 Tg C/yr—comparable to tropical rainforests (6,000–10,000 kg C/ha/yr) (nature.com).
Seagrass carbon per area: Biomass holds ~1,551 kg C/ha; soil stocks are ~22,000 kg C/ha—meaning biomass is ~7% of total, yet plays a key role in protecting soil carbon from erosion (nature.com).
Mangrove ecosystem value: Coastal habitats like mangroves are being lost at ~2% annually, and yet deliver ecosystem services valued at $1.6 billion per year (thebluecarboninitiative.org).

These figures highlight the efficiency of blue carbon systems and the need for conservation to avoid losing not just carbon, but livelihoods and biodiversity.

Why Blue Carbon Markets Aren’t Scaling

Despite the obvious climate benefits, blue carbon credits (BCCs) still represent a tiny slice of global carbon markets. By March 2025, only 6.96 million BCCs had been issued, with nearly half (3.65 million) still active, and just 19 projects issuing real credits, led largely by Pakistan (69% market share), India (8%), Senegal (7%), and Indonesia (6%) (nature.com).

In contrast, terrestrial forest projects dominate voluntary carbon markets. Structural barriers—including lack of recognition in some schemes (e.g., ACCU), high transaction costs, complex monitoring, reporting, and verification (MRV), and insufficient inclusion in national climate strategies—limit blue carbon potential.

Ramping Up: Closing the Scale Gap

To align blue carbon’s contribution with its potential, we must:

Scale community-led and Indigenous co-management models that deliver both social equity and resilience.
Streamline MRV through standardized protocols tailored to coastal ecosystems—especially seagrass, mangrove, and tidal marshes.
Integrate blue carbon into national climate frameworks and carbon markets, granting equal eligibility and transparency.
Mobilize finance: The Our Ocean Conference has already unlocked $133 billion across 2,600 ocean action commitments, with $86.8 billion toward ocean-climate initiatives—including blue carbon; yet global need is estimated at $175 billion annually for SDG 14, with ocean-based climate finance as part of a $1.3 trillion annual global climate fund gap (wri.org).

Conclusion: A Tangible 2075 Vision

By focusing on blue carbon equity and finance, we can more than fivefold the area of restored mangroves by 2075 (from 2 Mha to over 10 Mha), delivering billions of tonnes of CO₂ sequestration while enhancing coastal resilience and livelihoods.

Policy Recommendation: National governments should integrate blue carbon into their NDCs (Nationally Determined Contributions) with dedicated finance structures and MRV support, while development banks (like the World Bank) should replicate instruments like sovereign blue bonds (e.g., Thailand’s pioneering example) to mobilize private capital toward community-led and Indigenous-managed blue carbon restoration.

If we align finance, governance, and science, blue carbon projects can move from niche pilots to mainstream climate strategies—realizing both ecological integrity and climate targets.

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