Good practice

Tahiry Honko — Projet Communautaire de Carbone Bleu des Mangroves, LMMA de Velondriake (Madagascar)

Madagascar · Andavadoaka · See the Madagascar profile

Blue Ventures et les communautés de Velondriake protègent plus de 1 200 hectares de mangroves dans le sud-ouest de Madagascar sous Plan Vivo + CCB Or — premier projet communautaire de carbone bleu validé au monde — générant USD 27 000/an en crédits carbone pour plus de 12 000 personnes.

1,200+ ha

Mangroves protégées

USD 27,000 /yr

Revenu carbone annuel

12,000+

Personnes bénéficiaires

Tahiry Honko — Projet Communautaire de Carbone Bleu des Mangroves, LMMA de Velondriake (Madagascar)

Details

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

Context

Tahiry Honko, géré par Blue Ventures avec les communautés de Velondriake dans le sud-ouest de Madagascar, est le premier projet communautaire de carbone bleu validé au monde, certifié selon Plan Vivo et CCB Gold.

Results

Il protège plus de 1 200 ha de mangroves, générant environ 27 000 USD par an en crédits carbone pour plus de 12 000 personnes.

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 — Projet Communautaire de Carbone Bleu des Mangroves, LMMA de Velondriake (Madagascar). Persistent ID: 4ca573fe-0919-4c09-9bf2-c2f223257281.

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