DTM在高黎贡山羚牛潜在生境研究中的应用

Application of Digital Terrain Model in the Potential Habitat of Takin in the Gaoligong Mountain

本文建立了高黎贡山自然保护区北段范围的数字地形模型,并将其应用在濒危珍稀动物——羚牛潜在生境评价研究中。通过叠加羚牛活动区的海拔高度、坡度及植被类型,获得了羚牛的潜在生境区,结合羚牛的生态习性与实地调查资料,选择海拔高度、坡度、植被因子3个指标对其潜在生境的适宜性进行了划分和评价。结果表明:在没有人类活动的影响下,羚牛可在研究区内大部分地区生存。从1974￣2004年,适宜羚牛生存的各等级生境面积逐年减少,而不适宜生境的面积逐年增加。

Digital elevation model （DEM） was buih and used in habitats research of Takin （B.taxicolor. taxcicolor）, a kind endangered and rare species anintal distributed mainly in Gaoligong Mountain area. DEM, slope model and vegetation distribution model were overlapped to pruduce digital terrain model （DTM）. DTM was appliecl very well in the research of Takin habitat in the north Gaoligong mountain. Comparing with the ecological behavior of Takin and filed work, the potential habitat area of Takin had been identified based on indicators （elevation, slope and vegetatiun area）. Elevation, slope, vegetation were used to assess and to classify Takin＇s potential habitat. The result shows that large region is suitable for Takin＇s living in the study area without human disturbance, meanwhile, it illuminates that it is possible for Takin had been distributed in this region long ago. The habitat＇s area is suitable for Takin living is reduced and the area of unsuitable habitat is increased year after year, during the period from 1974 to 2004.