庐山自然保护区不同功能区植被动态变化格局分析

vegetation Dynamics and patterns of change in Different Functional protection subzones of Lushan Nature Reserve

摘要:

借助 RS、GIS和景观分析工具 , 利用 1992、2015年 LAndsAt TM/ OLI影像计算归一化差值植被指数(NDVI) , 对 庐 山 自然保护区植被动态变化进行分析 , 并利用景观指数按增加、减少和无变化 3 种类型模拟变化格局 , 并不同功能区的 植被动态及其变化格局的空间分异性进行对比 。结果表明:保护区内的植被基本保持稳定并得到改善;核心区的植被稳定 类型主要集中于中心 , 增加类型聚集在区域边缘;缓冲区的植被动态呈现出了 一定的集聚特征;实验区受附近村庄和旅游 等人为活动影响 , 稳定性低、变化幅度较大、增加与减少共存。

Abstract:

In this paper , the Normalized Difference vegetation Index (NDVI) was extracted from Landsat TM/ OLI images in 1992and 2015by RS, GIS and landscape analysis tools . The dynamic changes of vegetation in Lushan Nature Reserve were analyzed and the landscape pattern was simulated accoding to the three index patterns including increasing , decreasing and non — changing to compare the spatial dynamics of vegetation dynamics and their changing patterns in dif- ferent functional areas . The results show that the vegetation in the reserve was basically stable and improved ; the vegeta- tion — stable types in the core area were mainly concentrated in the center , and the increasing types are concentrated in the edge of the region; the vegetation dynamics in the buffer area showed certain aggregation characteristics; the experi- mental area was affected by human activities such as nearby villages and tourism , and the stability was low and changable , and the increasing extent was larger , and the increasement and decreasement coexisted.