A Global Success Story: Scaling Community-Led Blue Carbon in Tanzania
Location: Tanzania (Pemba)
Year of Support: 2022 onwards
Ocean Impact Area: Blue Carbon and ecosystem-based livelihoods
On the mangrove edge in Mkoani District, Pemba, livelihoods and ecosystems are tightly braided together. For the 38 households of the Mapape Cooperative, protecting mangroves is not a side mission. It is the foundation that makes everything else possible: food, income, and a coastline that can keep doing its job as a carbon sink and storm buffer.
Mapape already had the coastal wisdom and a working model, combining sea cucumber farming with mangrove beekeeping. The challenge was translating that proven local system into something the global blue carbon economy can recognize and invest in. That meant becoming more than an informal group. It meant building the governance, infrastructure, and operational discipline to absorb capital and deliver consistently, without losing what makes the model regenerative.
Through the IUCN Bahari-Mali project, OceanHub Africa played an institutional bridge role. Since 2022, we helped mobilize grant support and technical assistance to professionalize operations and strengthen the “management hardware” needed to scale.
We worked alongside the cooperative to improve readiness across practical pillars:
- Infrastructure updates: Supported pond rehabilitation and construction of a 40m² farm (capacity: 1,500 units), including procurement of equipment like plastic nets and galvanized pipes.
- Market intelligence: Conducted customer discovery with 8 local traders to align supply with requirements for quality, quantity, and delivery.
- Asset security and monitoring: Supported a surveillance tower and tracking systems to protect high-value stock and monitor seedling health and size.
- Diversification: Supported installation of 24 beehives and rehabilitation of a crab farming site to strengthen a multi-income “Blue Carbon+” model.
Results
- Environmental: 3,000+ sea cucumbers produced—a 2,900% increase in production—reinforcing incentives to protect carbon-sequestering mangrove habitats.
- Social: 38 households strengthened through the shift from an informal group to a professionalized enterprise with clear governance and financial structures.
- Economic: 833% revenue growth, increasing from €1,814 to €15,120 annually.
- Capital Unlocked: $150,000 secured through the Blue Carbon+ Challenge (2025), moving Mapape toward a bankable, climate-aligned enterprise.
This is what community-led blue carbon can look like when it is built for durability: local stewardship that stays rooted in place, but gains the structure and credibility needed to attract investment and scale without compromising the ecosystem it depends on.
