GIS支持下的秦岭植被景观梯度分析

秦岭植被景观类型丰富，具有过渡性和复杂性特点，植被垂直分带明显. 在分析了大尺度秦岭植被景观空间水平分布格局的基础上，利用基于GIS梯度分析方法，分析秦岭的植被与海拔梯度的关系，得到秦岭不同植被景观类型的斑块数、分布范围、植被分布的海拨高度平均值和标准差，并以太白山为例，对太白山植物种进行了梯度分析. 结果表明，随着海拔高度的增加，太白山依次出现7种植被景观类型:温带草丛→温带落叶灌丛→温带落叶阔叶林→亚热带针叶林→亚热带和热带山地针叶林→草甸→高寒草甸等植被类型，植物种亦发生相应的变化. 

Vegetation Landscape Gradient Analysis Based on GIS in Qinling Mountains

Vegetation landscape types of Qinling Mountains (Mts.) are rich and have characteristics of transition and complexity, and the vertical belts are evident too. Applying the gradient analysis method based on the horizontal spatial patterns of vegetation and GIS platform, the effects of altitudinal gradient on vegetations of Qinling Mts. were analyzed, and the results of patches'sum, distribution range, mean value and standard deviation of different vegetation types calculated. Exemplified with the plant species of Taibai Mts., the gradient analysis method was conducted. The results of gradient analysis of Taibai Mts. are asfollows: with the increase of the elevation, the vegetation types change in theorder of temperate grassland→temperate deciduous scrub→temperate deciduous broad-leaved forest→subtropical coniferous forest→subtropical and tropical mountain coniferous forest→meadow→high-cold meadow, and the corresponding plant species change with the elevation too.