Skip to Content

*Estimated carbon sequestration is 20 kg of CO2e per tree accumulated over five years, based on low estimates of dry and humid tropical growth rates from global restoration databases.

Actual carbon impact of each Priceless Planet Coalition restoration project will be assessed after five years based on data collected throughout the monitoring process.

Watershed restoration to benefit biodiversity and the local economy

Lake Alaotra is the largest lake in Madagascar, a Ramsar site whose watershed provides water to the island’s main rice-growing region and contributes to the production of freshwater fish. The flagship landscape for restoration is neighboring the Lake Alaotra region and contiguous to the Zahamena and Corridor Ankeniheny-Zahamena protected areas. There is no restoration program in Madagascar at this scale that combines diverse cost-effective restoration strategies backed by local knowledge and science. Led by local stakeholders, implementation of this flagship project will contribute to climate mitigation and adaptation and benefit the local economy and biodiversity.

Restoration methods

Active tree planting
The planting of seedlings over an area with little or no forest canopy to meet specific goals.

Assisted natural regeneration
The exclusion of threats (i.e., grazing, fire, invasive plants) that had previously prevented the natural regrowth of a forested area from seeds already present in the soil or from natural seed dispersal from nearby trees.

Applied nucleation/tree islands
A form of enrichment planting where trees are planted in groups, clusters or even rows, dispersed throughout an area, to encourage natural regeneration in the matrix between the non-planted areas.

The intentional mixing and cultivation of woody perennial species (trees, shrubs, bamboos) alongside agricultural crops in a way that improves the agricultural productivity and ecological function of a site.

Direct seeding
The active dispersal of seeds (preferably ecologically diverse, native seed mixes) that will allow for natural regeneration to occur, provided the area is protected from disturbances. This is a differentiated category from planting young trees.

Tree species

Native species:

  • Dombeya (Dombeya spp)
  • Macaranga (Macaranga spp)
  • Hemp (Trema orientalis)
  • Croton mongue (Croton mongue)
  • Spurge (Euphorbia tetraptera)
  • Canthium (Canthium spp)

ANR species:

  • Sweetwood (Ocotea spp)
  • Symphonia spp
  • Weinmannia spp
  • Prothorus dintimena
  • Sugar plum (Uapaca spp)
  • Sary (Beilschmiedia oppositifolia)

Direct seeding species:

  • Copal (Trachylobium verrucosum)

Enrichment planting species:

  • Rosewood (Dalbergia spp)
  • Sweetwood (Ocotea spp)
  • Pacific almond (Canarium madagascariensis)

Agroforestry species:

  • Coffee (Coffea spp)
  • Cloves (Syzygium aromaticum)