Predicting Distribution, Habitat Suitability and the Potential Loss of Habitat for Sitta formosa , The Beautiful Nuthatch

摘要: The beautiful nuthatch, Sitta formosa, occurs in high-altitudc evergreen and semi­ forests throughout the south southeastern extent of Himalayan Mountains. Populations S. formosa are small, declining severely fragmented as a result habitat degradation fragmentation, therefore it is considered vulnerable by World Conservation Union included 2004 Red List o f Threatened Species. I used ecological niche factor analysis to model potential distribution predict suitable for formosa. By using 59 presence locations, collected from museum specimens biodiversity surveys, together with topographic climate variables, found be linked much greater than average rainfall slopes study area. points were highly correlated mature (frequency = 0.86), consisting broadleaf, deciduous broadleaf mixed forests. Core (habitat suitability index > 80) was predicted 918,000 km^ within southeast Asia, yet current cover type maps indicate that only 57% this area remains forested. Potentially, 270,000 historically has been converted croplands. At coarse scale, populations threatened agriculture timber extraction potentially most loss, fragmentation population isolation; however, closer look at biological needs species necessary effective management. models derived