Comparison of two approaches for detecting the depth of edge influence on vegetation diversity in the arid valley of southwestern China

编号 zgly0000390648

文献类型 期刊论文

文献题名 Comparison of two approaches for detecting the depth of edge influence on vegetation diversity in the arid valley of southwestern China

学科分类 220.1060;森林生态学

作者 LILiguang  HEXingyuan  LIXiuzhen  WENQingchun  ZHAOYonghua 

作者单位 Instituteof Apphed Ecology Chinese Academy of Sciences 

母体文献 林业研究: 英文版 

年卷期 2005,16(2)

页码 105-108

年份 2005 

分类号 Q948.1  Q149 

关键词 植物多样性  边界  影响域  景观  主成分分析法  移动窗口法  西南地区  干旱河谷区 

文摘内容 Three types of landscape boundary (forest/pepper field, forest/cabbage field, and forest/grassland) were selected in the arid valley of upper reaches of Minjiang River, southwestern China. On the basis of vegetation diversity, the depth of edge influence (DEI) on different types of landscape boundaries was estimated using principal components analysis (PCA) method and moving split-window techniques (MSWT). The results showed that in the 5 transects, PCA method was able to detect the edge influence depth with 3 transects, while MSWT could explain 4 transects. It is concluded that PCA and MSWT both can be used to detect the depth of edge influence within 50 m from the edge to the interior. Similar conclusions were drawn in the forest of each transect with the two methods, but no similar conclusions were drawn in the pepper field of each transect. Although the two methods have advantages and disadvantages respectively, they are useful tools for characterizing edge dynamics. Comparing the two methods, MSWT is more successful。