Research On Habitat Fragmentation Of Fran(?)ois Langur Based On 3S Technology

Fran(?)ois langur (Trachypithecus fran(?)ois) is the endangered and protected species around the world and it distributes restrictedly in Guangxi, Guizhou, Chongqing in China and northern Vietnam. It has been defined the First-Class National Protected Species in China and Endangered-Class in the world. Habitat fragmentation is the major threat to Fran(?)ois langur.Based on 3S technology, we analyzed landscape pattern and habitat fragmentation of fran(?)ois langur, revealed the relationship between human activities and habitat fragmentation, and analyzed habitat restoration by GIS simulation, which is a scientific reference for fran(?)ois langur protection and management. The study areas include Longzhou, Fusui, Daxin, Long'an Buye, Long'an Qunxu, Debao, Jinxi Yuexu, Jinxi Nanpo, Jinxi Xinxin,Longlin in Guangxi province and Mayanghe natural reserve, Daozhen natural reserve in Guizhou. The main results are as following:1,The habitat landscape pattern of fran(?)ois langur was studied by means of TM remote sensing image, electron map and relief map as the main information source and GIS as the main tool.2,We analyzed the main index of landscape pattern and habitat fragmentation of Longzhou, Fusui, Daxin, Long'an, Debao, Jinxi, Longlin in Guangxi province and Mayanghe natural reserve, Daozhen natural reserve in Guizhou with GIS, Fragstats and Patch Analyst:2.1 The total area of study regions are 6821.39ha,3703.37ha,4974.72ha,1014.94ha,1163.69ha,2520.16ha,2051.69ha,1054.61ha,1528.75ha,2061.80ha,32498.74ha,10665.86ha respectively.2.2 The Shannon-Weinner index of study regions are 0.27,0.96,0.81,1.20,0.98,0.95,0.83,0.76,0.96,0.93,1.31,0.79 respectively.2.3 The Contagion index of study regions are 91.27,72.73,77.12,65.86,72.24,73.15,71.11,78.16,77.50,73.84,52.42,77.94 respectively.2.4 The mean patch areas are 32.18ha,16.10 ha,20.39 ha,12.08 ha,14.55 ha,15.00 ha,21.83 ha,20.68 ha,10.26 ha,17.62 ha,11.74ha,28.22ha respectively.2.5 The forest patch area fragmentation index are 0.0584,0.4511,0.2816,0.4083,0.4490,0.2790,0.2629,0.2383,0.2505,0.1187,0.5110,0.2364.3,We regarded farmland and residential area as human impact sources, and natural areas within a 400m distance as disturbance area. Through analyzing, we find the fragmentation index of disturbance area is higher than the natural area, and the Karst forest proportion is lower, so we...