The Rimba Raya Biodiversity Reserve REDD Project

Emissions from aboveground biomass. Carbon stock changes inaboveground biomass and explained in full in the methodologyand are the sum of carbon stock changes due to timber extractionprior to land clearing, biomass burning of the remainingvegetation, and re-growth of replacement vegetation (palm oil).Harvest emissions during rotation years are not included.Timber emissions. The biomass of timber extracted under thebaseline scenario was estimated by implementing stepsoutlined in Section 5.2.1.1 in the methodology. Project-­specificdata were used and are described in the BaselineReport.Step 1. Determine species and minimum diameter of treesthat would have been extracted under the baseline scenario.All tree species above the minimum diameter threshold wereassumed to be harvested. It is conservative to assume alarger proportion of trees extracted before the remainingtrees are burned, because some of the carbon in theextracted timber is stored as long-­‐term wood products. Theminimum diameter that would have been harvested underthe baseline scenario was assumed to be 20 cm. Thisthreshold is based on market survey information collected byBOSF on common practice in the region.Biomass in trees >20 cm for all Rimba Raya landcover classesare shown in Table 20 and reflect project-­‐specific analysisbased on aerial and ground survey data.Weighted average CO 2 e emissions were used in calculationsfor each concession based on the proportion of each landcover type present within each concession area.109