The Rimba Raya Biodiversity Reserve REDD Project

that contribute substantially to commercial timber volumes in alogging concession – provided that a management plan is in placeto ensure long term population viability through sustainableharvesting. In this situation, management of commercial HCV 1.2plants becomes identical to that of HCV 1.3, namely to retainsufficient habitat for maintaining viable populations. In the caseof the Rimba Raya project, this management provision of HCV 1.2would permit limited selective timber harvesting of CRdipterocarps for local use by communities within the Project Zoneas part of a broader livelihoods development program.Herptofauna. Only one HCV 1.2 species of herptofauna wasidentified as potentially present in the Project Zone, the CRPainted river terrapin (Callagur borneoensis). This species isknown to inhabit the tidal portions of rivers and estuarinemangrove areas and to feed on fruit, leaves, and clams. As theproject aims to prevent further degradation of the Seruyan Riverand its tributaries through stabilizing land use and replantingsome areas to restore riparian zone and flood plain buffers, thesesuccessful conservation actions will have a positive net impact onthis HCV 1.2 species, if present.Conclusion. Overall, conservation efforts planned by the projectto protect remaining natural forests and prevent furtherdegradation of river quality will result in net positive impacts onHCV 1.2 species likely present in the Project Zone.HCV 1.3 Areas that Contain Habitat for Viable Populations ofEndangered, Restricted-­‐Range, or Protected SpeciesThe aim of HCV 1.3 is to identify areas where viable populationsof endangered, restricted-­‐range, or protected species are knownor likely to occur, and to ensure that management action is takento conserve sufficient habitat for long-­‐term viability of thepopulation. In the assessment of this HCV, populations of speciesconfirmed or likely present are assumed to be viable untilcredibly proven otherwise through population modeling, analysisof habitat extent and condition, or exhaustive field surveys. HCV1.3 species also include viable populations of CR species listedabove under HCV 1.2.Conservation activities of the project will have net positiveimpacts on HCV 1.3 bird, mammal, or plant species as follows:Birds. A total of 110 HCV 1.3 bird species are considered likelypresent in the project zone (see Table 9). Of these, 38 (35%) arethought to depend solely on natural forest, while another 34(31%) use natural forest as well as disturbed forests. Nineteenspecies are known to use converted non-­‐forest lands, but only 3of these exist solely in non-­‐forested areas. Thirty-­‐nine speciesare wetland and/or coastal species.Major threats to HCV 1.3 birds include habitat loss anddegradation, especially of riparian and wetland habitat foraquatic birds. As with other parts of Kalimantan, bird capture forlocal consumption and the commercial pet trade may represent afurther threat to HCV 1.3 birds, but there were no indications ofsuch activity during preliminary field visits to villages in theProject Zone.Based on habitat needs for HCV 1.3 birds, long-­‐term populationviability will require protecting forests and non-­‐forestedwetlands. Project conservation measures to protect all remainingforests and to restore targeted riparian and floodplain bufferzones in the Project Area will address the most important threatto HCV 1.3 species by securing remaining habitat and preventing257