Good practice

Tahiry Honko — Community Mangrove Blue Carbon Project, Velondriake LMMA (Madagascar)

Madagascar · Andavadoaka · See the Madagascar profile

Blue Ventures and Velondriake communities protect 1,200+ hectares of mangroves in southwest Madagascar under Plan Vivo + CCB Gold—the world's first validated community blue carbon project—generating USD 27,000/year in carbon credits for 12,000+ people.

1,200+ ha

Mangroves protected

USD 27,000 /yr

Annual carbon revenue

12,000+

People benefiting

Tahiry Honko — Community Mangrove Blue Carbon Project, Velondriake LMMA (Madagascar)

Details

Maturity: Established
Promoter: Blue Ventures / Velondriake LMMA
Period: 2019–2039
Keywords: civil society, community, blue carbon, marine, mangrove

Context

Tahiry Honko, run by Blue Ventures with the Velondriake communities in south-west Madagascar, is the world's first validated community blue-carbon project, certified under Plan Vivo and CCB Gold.

Results

It protects over 1,200 ha of mangroves, generating about USD 27,000 per year in carbon credits for more than 12,000 people.

Implementation

Implementation detail (cost, timeline, staffing, conditions for success) is not yet available for this practice.

Data sources

Where this practice's information was retrieved from, and when.

C-NAPSE web research — accessed 2026-06-22
Blue Ventures / Velondriake LMMA — accessed 2026-06-22
Plan Vivo Project Page — accessed 2026-06-22
Blue Ventures Launch Announcement — accessed 2026-06-22
Commonwealth Case Study — accessed 2026-06-22
PANORAMA Pathfinder Award 2021 — accessed 2026-06-22

Attachments

Quality score: 67/100

How is this calculated?

Evidence: Observational / pre–post

Top 8% in this catalogue (335 scored practices)

Scores cluster high, so position within the catalogue is often more telling than the number alone.

Evaluation

Evaluated by C-NAPSE

Score profile — the dimensions behind the score — how it's computed

Carbon — sequestration / storage, evidenced2/3

Plan Vivo validates 1,300+ tCO₂e/year of avoided mangrove deforestation; the modest annual figure reflects the 1,200 ha project area under a conservative deforestation baseline, not a methodology weakness.

Biodiversity — conservation / improvement, evidenced3/3

CCB Gold certification independently verifies mangrove habitat conservation for marine biodiversity; Blue Ventures field monitoring documents fish nursery function and recovery of mangrove-dependent species.

Water & soil — retention, infiltration, erosion control2/3

Mangroves demonstrably reduce coastal erosion and maintain nearshore sediment quality; the Commonwealth and Blue Ventures case studies cite storm-surge buffering as a documented co-benefit.

Fire resilience — risk reduction, evidenced0/3

Coastal mangrove wetlands are not susceptible to fire; this dimension does not apply to blue carbon projects.

Governance, certification & transferability3/3

Plan Vivo and CCB Gold certification, community-led governance through the Velondriake LMMA (a locally managed MPA), and 73% revenue retention by local actors demonstrate exemplary accountability and transferability.

Cite this

Evidoria. Tahiry Honko — Community Mangrove Blue Carbon Project, Velondriake LMMA (Madagascar). Persistent ID: 4ca573fe-0919-4c09-9bf2-c2f223257281.

Export as decision brief (PDF)

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