| 放牧和刈割条件下草山草坡群落空间异质性分析 |
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| 引用本文： | 辛晓平,李向林,杨桂霞,徐斌. 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, 13(4): 449-453 |
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| 作者姓名： | 辛晓平 李向林 杨桂霞 徐斌 |
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| 作者单位： | 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 |
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| 基金项目： | 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). |
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| 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，刈割条件下空物异质性及空间相关性弱，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。
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| 关 键 词： | 放牧 刈割条件 草山草坡群落 空间异质 空间自相关性 变异矩分析 分形方法 |
| 文章编号： | 1001-9332(2002)04-0449-05 |
| 修稿时间： | 1999-12-13 |
Spatial heterogeneity of grassland pattern under grazing and forage condition |
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| XIN Xiaoping,LI Xianglin,YANG Guixia and XU Bin. Spatial heterogeneity of grassland pattern under grazing and forage condition[J]. The journal of applied ecology, 2002, 13(4): 449-453 |
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| Authors: | XIN Xiaoping LI Xianglin YANG Guixia XU Bin |
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| Affiliation: | Institute of Natural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081. xxpmail.caas.net.cn |
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| 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(beta-diversity) was smaller. Spatial heterogeneity of grazed grassland was simplified by grazing, because topographical variation was partly wiped out. |
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| Keywords: | Spatial heterogeneity Spatial autocorrelation Semivariance analysis Fractal method. |
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