首页 | 本学科首页   官方微博 | 高级检索  
   检索      

毛乌素沙地沙生半灌木群落的空间异质性
引用本文:陈玉福,于飞海,董鸣.毛乌素沙地沙生半灌木群落的空间异质性[J].生态学报,2000,20(4):568-572.
作者姓名:陈玉福  于飞海  董鸣
作者单位:中国科学院植物研究所植被数量生态学开放研究实验室,北京,100093
基金项目:国家杰出青年科学基金!(No.39825106),中国科学院资源与生态环境研究重大项目!(KZ951-B1-1 08)资助
摘    要:在使用 5m× 50 0 0 m样带进行调查获得的植被盖度数据的基础上 ,通过半方差分析和分形分析揭示了毛乌素沙化草地沙生半灌木群落植被盖度的空间变异特点。半方差分析揭示出植被盖度的多尺度变异和等级斑块结构 ,在取样范围内至少存在着 3个等级。分形分析得出毛乌素沙地沙生半木群落植被盖度的分维 D=1 .90 ,接近于 2 ,指示着大部分空间变异发生在较小的尺度上 ;分段分形分析得出不同尺度范围内的分维 ,反映了空间异质性的多尺度变异性。这一结果揭示了荒漠化过程引起的生境破碎化

关 键 词:空间异质性  半灌木群落  植被盖度  毛乌素沙地
收稿时间:1999/9/30 0:00:00
修稿时间:3/2/2000 12:00:00 AM

Spatial heterogeneity of the psammophytic half shrub community in Mu Us Sandland
CHEN Yufu,YU Feihai and DONG Ming.Spatial heterogeneity of the psammophytic half shrub community in Mu Us Sandland[J].Acta Ecologica Sinica,2000,20(4):568-572.
Authors:CHEN Yufu  YU Feihai and DONG Ming
Institution:Lab.of Quantitative Vegetation Ecology; Institute of Botany; The Chinese Academy of Sciences; Beijing; China
Abstract:Based on the data from field investigation along a 5 km transect,spatial variant features of the vegetation coverage of the psammophytic half shrub community in Mu Us Sandland was described through semivariance analysis and fractal analysis.Nested structure of the vegetation coverage and its multiple scale of variability were revealed by semivariance analysis.There were at least three scales of variability over the sampling range.Fractal dimension of the vegetation coverage was estimated by fractal analysis.It was 1.90,suggesting the dominance of variations of smaller scales.Fractal dimensions at different scales were obtained through piecewise fractal analysis,which reflecs the multi scale variation in spatial heterogeneity of the community.This result reveals habitat fragmentation caused by the desertification in this region.
Keywords:spatial heterogeneity  the psammophytic half  shrub community  vegetation coverage  semivariance analysis  fractal analysis  Mu Us Sandland
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《生态学报》浏览原始摘要信息
点击此处可从《生态学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号