Human livelihoods, ecosystem services and the habitat of the Sumatran orangutan: Rapid assessment in Batang Toru and Tripa

The World Agroforestry Centre (ICRAF), in collaboration with PanEco and Yayasan Ekosistem Lestari (YEL), conducted a rapid assessment of ecosystem services and human livelihood options provided by the remaining habitat of the Sumatran orangutan outside the Gunung Leuser National Park. We used a rapid analysis of carbon stock assessment (RaCSA) method to assess the carbon stock (aboveand belowground) at plot level and calculated land cover for carbon stock at landscape level. We calculated the net present value of important crop and tree commodities in Tripa and Batang Toru and analysed the costs and benefits of each commodity. To find solutions for better management at the two study sites, applications of the FALLOW model were developed, which allowed comparison of several possible scenarios. An attempt was made to translate such scenarios into opportunities for human livelihoods, orangutan population size and carbon emissions and stocks.