放牧和刈割条件下草山草坡群落空间异质性分析

应用生态学报 ›› 2002, Vol. ›› Issue (4): 449-453.

放牧和刈割条件下草山草坡群落空间异质性分析

辛晓平¹, 杨桂霞², 徐斌¹, 李向林¹

1. 中国农业科学院农业自然资源与农业区划研究所, 北京 100081;
2. 中国农业科学院畜牧研究所, 北京 100091

收稿日期:1999-12-13 修回日期:2000-07-21
通讯作者: 辛晓平,女,1971年生,博士,副研究员,主要从事景观生态学、草地生态学模型以及遥感和GIS在生态学中的应用研究,发表论文22篇.Tel:010-68919618E-mail:xxp@mail.caas.net.cn
基金资助:
国家“九五”重点科技攻关项目(960160202);国家自然科学基金资助项目(39899370).

Spatial heterogeneity of grassland pattern under grazing and forage condition

XIN Xiaoping¹, LI Xianglin², YANG Guixia¹, XU Bin¹

1. Institute of Natural Resources and Regional Planning, Chinese Academy of A-gricultural Sciences, Beijing 100081;
2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100091

Received:1999-12-13 Revised:2000-07-21

摘要/Abstract

摘要： 采用变异矩分析和分形方法,研究了草山草坡群落在放牧和刈割条件下的空间异质性及空间自相关性.结果表明,群落空间格局有尺度依赖性,刈割条件下空间异质性及空间自相关性比放牧条件下复杂,具有不同的分形特征的尺度范围(尺度域)更多.刈割地物种多样性空间自相关性弱,多样性梯度即β多样性小.放牧消除地形引起的样地差异,因而使空间异质性简单化.

Abstract: Spatial heterogeneity and spatial autocorrelation of grassland pattern under grazing and forage condition were studied using semivariance analysis and fractal method. The results indicate that vegetation patterns are scale-dependent. Spatial heterogeneity and spatial autocorrelation of foraged grassland are more complex than grazed grassland and have more scale regions which determined by different fractal characteristics. Spatial autocorrelation of species diversity on foraged grassland was weaker, in another word, gradient of species diversity(β-diversity) was smaller. Spatial heterogeneity of grazed grassland was simplified by grazing, because topographical variation was partly wiped out.

Key words: Spatial heterogeneity, Spatial autocorrelation, Semivariance analysis, Fractal method, total phosphorus., iron-carbon, interior electrolytic substrates, COD, ammonium nitrogen, aquatic plant, water purification

中图分类号:

S812.8

辛晓平, 杨桂霞, 徐斌, 李向林. 放牧和刈割条件下草山草坡群落空间异质性分析[J]. 应用生态学报, 2002, (4): 449-453.

XIN Xiaoping, LI Xianglin, YANG Guixia, XU Bin. Spatial heterogeneity of grassland pattern under grazing and forage condition[J]. Chinese Journal of Applied Ecology, 2002, (4): 449-453.

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