生态环境学报2012，Vol.21Issue(3)：422-427,6.
人工封育区沙化草地植被生态位研究
The studies on sandy grassland vegetable niche of artificial fencing area
摘要
Abstract
Using sample line and sample approaches for field survey in artificial fencing of Ningxia Hui Nationality Autonomous Region. In order to reveal the sandy grassland plants niche variation in three kinds of fencing measures including outside area, edge area and core area. The niche breadth and niche overlap were measured using important value, Levins index and Pianka index. The results showed that the biggest of important value were Artemisia ordosica Krasch. and Salsola ruthenica IIjin., which were 689.53 and 455.83. The niche breadth of Artemisia ordosica Krasch. was both the biggest in the outside area and edge area, which were 0.846 and 0.790. In the core area, the niche breadth of Heteropappus altaicus (Willd.) Novopokr. was 0.640, It's the dominant species in the artificial fencing. The results of niche overlap showed that the niche breadth didn't have directly liner relation with niche overlap. The average value of niche overlap and percentage of overlap showed that outside area>core area>edge area. The difference of niche breadth and niche overlap in three kinds of fencing measures showed that moderate fencing was conducive to the recovery of vegetation, but with the fencing time extension, artificial fencing would inhibit plant regeneration and seedling formation.关键词
人工封育/沙化草地/重要值/生态位宽度/生态位重叠Key words
artificial fencing/ sandy grassland/ important value/ niche breadth/ niche overlap分类
农业科技引用本文复制引用
苏鹏飞,张克斌,王瑞斌,王晓,庞吉林,刘帅华..人工封育区沙化草地植被生态位研究[J].生态环境学报,2012,21(3):422-427,6.基金项目
国家自然科学基金项目(30771764) （30771764）
国家林业局宁夏盐池荒漠化定位监测项目 （）
