干旱区生态环境知识资源中心(Arid): 浑善达克沙地小叶锦鸡儿灌丛的空间异质性

Arid

	浑善达克沙地小叶锦鸡儿灌丛的空间异质性
其他题名	Spatial heterogeneity of Caragana microphylla shrub communities in the Otindag Sandland
	初玉 1; 杨慧玲 2; 朱选伟 1; 董鸣 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2005
卷号	25 期号:12 页码:3294-3300
中文摘要	豆科锦鸡儿属（Caragana）植物冈其可以生物固氮而在草原生态系统中具有特殊的地位。定量分析小叶锦鸡儿（Caragana microphylla）灌丛在浑善达克沙地不同生境条件下的分布格局，有助于理解植被与土壤养分循环之间的关系和合理制定退化沙地的恢复对策。采用地统计学中的半方差分析和分形分析两种方法研究了浑善达克沙地小叶锦鸡儿灌丛的空间分布格局，分析了不同生境中小叶锦鸡儿灌丛的植被、土壤水分和养分间的相关性。结果表明：（1）小叶锦鸡儿灌丛在3种生境条件下（滩地、固定沙丘和半固定沙丘）的盖度、土壤有机质和伞氮的空间分布符合球状模型，空间自相关显著；（2）土壤pH值在滩地和固定沙丘的空问分布符合球状模型且空间自相关显著，但在半固定沙丘空间自相关不显著；（3）土壤水分在3种生境中的空间分布都符合线性模型，空问自相关显著。（4）植被的变异尺度（变程）小于各个土壤要素的变异尺度。植被（小叶锦鸡儿灌丛）的分布和形成过程决定了土壤养分的分布和形成过程。当地的小叶锦鸡儿灌丛在养分沃岛现象的形成中起了重要作用，合理的利用和布局当地的小叶锦鸡儿灌丛的分布，可以更加有效地补充草地生态系统的养分，从而有利于加快生态系统的恢复进程。
英文摘要	Caragana plants are among the important nitrogen-fixers in the Otindag Sandland, semi-arid area in China. They can provide with useful information about the relationship between vegetation and nutrient cycling as well as with powerful measure of the degraded sand land to quantify the The aims of this study were to investi spatial gate the pattern of Caragana microphylla shrub patterns in C. microphylla in the and resource heterogeneity in the Otindag Sandland. Using the semivariance analysis and the fractal analysis, the spatial patterns of C. microphylla shrub communities in three habitats were examined. The coverage of C. microphylla shrub communities, total N and organic C exhibited significant spatial water content all fitted linear model. The soil autocorrelation in the three habitats, fitting the spherical model while the soil pH d did significant autocorrelation in the meadow and id not exhibit significant autocorrelation in the semi-fixed sand dune but the fixed sand dune, both fitting the spherical model. The scales autocorrelation of C. microphylla shrub communities were less than that of each soil factor, suggesting that distribution and formative process of C. microphylla shrub communities controlled the distribution of soil nutrient. The C. microphylla shrub communities were the most important factor affecting the process of the ＂fertility islands＂ of the soil nutrients in the sandland. Thus, reasonably using and placing C. microphylla shrub communities can supply the soil nutrients for the ecosystem more effectively.
中文关键词	小叶锦鸡儿灌丛 ; 分形分析 ; 半方差分析 ; 空间异质性 ; 浑善达克沙地
英文关键词	Caragana microphylla shrub community fractal analysis semivariance analysis spatial heterogeneity the Otindag Sandland
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2174290
来源机构	中国科学院植物研究所 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206564
作者单位	1.中国科学院植物研究所, 植被数量生态学重点实验室, 北京 100093, 中国; 2.中国农业大学资源与环境学院, 北京 100094, 中国
推荐引用方式 GB/T 7714	初玉,杨慧玲,朱选伟,等. 浑善达克沙地小叶锦鸡儿灌丛的空间异质性[J]. 中国科学院植物研究所, 中国农业大学,2005,25(12):3294-3300.
APA	初玉,杨慧玲,朱选伟,&董鸣.(2005).浑善达克沙地小叶锦鸡儿灌丛的空间异质性.生态学报,25(12),3294-3300.
MLA	初玉,et al."浑善达克沙地小叶锦鸡儿灌丛的空间异质性".生态学报 25.12(2005):3294-3300.