生态学杂志2012，Vol.31Issue(1)：66-73,8.
围栏封育和自由放牧对克氏针茅草原植被空间异质性的影响水
Effects of exdosure and uncontrolled grazing on spatial heterogeneity of Stipa krylovii steppe vegetation
摘要
Abstract
The heterogeneity of plant community species composition is the main attribute of plant community dynamics. By using line transect and quadrat methods, and based on species frequency and power law, this paper analyzed the variations of plant community species composition and spatial heterogeneity in an Inner Mongolian Stipa krylovii steppe under exclosure and uncontrolled grazing conditions. Inside and outside of the exclosure, the plant species all presented a centralized distribution. In terms of functional groups, xerophytes and mesoxerophytes were widely distributed inside and outside of the enclosure. Perennial herbaceous species dominated in life form. More than 60% of the species spread their seeds by gravity. Gramineae, Liliaceae, Compositae, and Leguminosae had a comparative advantage. Under exclosure, species diversity increased while community heterogeneity decreased, suggesting that the degraded grassland due to grazing was changing better.关键词
克氏针茅草原/幂函数法则/物种结构/空间异质性Key words
Stipa krylovii steppe/power law/species structure/spatial heterogeneity分类
农业科技引用本文复制引用
霍光伟,乌云娜,雒文涛,吕建洲..围栏封育和自由放牧对克氏针茅草原植被空间异质性的影响水[J].生态学杂志,2012,31(1):66-73,8.基金项目
国家自然科学基金项目(30870423、31170402)、中央高校基本科研业务费专项(DC10050101)和国家973项目(2009CB421308)资助. （30870423、31170402）
