Research On Potential Distribution Of The White-headed Langur Based On GIS Technology

Based on GIS technology,using the model of MaxEnt predicted potential distribution of the white-headed langur.and thinking the impaction of distribution of history,habitation,farmland,roads and information of vegetation,using spatial analysis evaluated potential distribution of the white-headed langur.Based on the result of above, provide corresponding protection countermeasures.The main results are as following:1,Based on TM remote sensing image,using the valuation Index of optimal bands .Using Unsupervised classification,Supervised classification and Decision tree classification classified the image of study area,which classified for farmland,vegetation,habitation and water.The rustle showed that Decision tree classification is the best classification,water area is 966.15km~2,habitation area is 2971.38 km~2,farmland area is 344.05km~2 and vegetation area is 9866.07km~2。2,Predicted the potential distribution of the white-headed langur by the model of MaxEnt. The study show that:the first step get 6 mainly environment,they are radiation(46.1﹪),precipitation of wettest quarter(19.2﹪),mean diurnal range(9.8﹪),river(7﹪),min temperature of coldest month(6.9﹪) and the value of soil PH(4﹪),accumulative contribution rate is 93﹪.The AUC result of the second run is 0.927,it show that the result has high reliability.3,Reclassify the potential distribution of the white-headed langur to the most suitable area(432.48 km~2),suitable area(941.38 km~2) and unsuitable area(15873.79 km~2).4,Evaluate the habitat of the white-headed langur by GIS based on its biological habit ,vegetation and historical distribution data. the most suitable area is 112.60 km~2,suitable area is 78.92 km~2 and unsuitable area is 17056.13 km~2.Analyze the main reason of quantity and habitat of the white-headed langur, finally put forward some protection measures.