干旱区生态环境知识资源中心(Arid): Analysis of Grassland Vegetation of the Southwest Heilongjiang Steppe （China） Using the Power Law

Arid

DOI	10.1111/j.1744-7909.2005.00121.x
	Analysis of Grassland Vegetation of the Southwest Heilongjiang Steppe （China） Using the Power Law
	Mikinori Tsuiki; Wang Yusheng; Yiruhan; Michio Tsutsumi; Masae Shiyomi
来源期刊	Journal of Integrative Plant Biology
ISSN	1672-9072
出版年	2005
卷号	47 期号:8 页码:917-926
英文摘要	In 1997, we conducted a vegetation survey in three semi-arid natural grasslands （steppes） with different livestock grazing intensities in Southwest Heilongjiang Province, China, The dominant grassland species was the grass Stipa baicalensis Roshev. Grasslands with light, intermediate, and heavy grazing intensities were located 10, 5, and 2 km from a village, respectively. Villagers use the steppe to raise cattle, horses, sheep, and goats. Each of the three grasslands was surveyed by placing 100 quadrats （50 cm50 cm） along a 50 m line transect. Each quadrat was divided into four equal areas （25 cm25 cm; S-quadrats） and all plant species occurring in each of these smaller areas were identified and recorded. These data were summarized into frequency distributions and the percentage of S-quadrats containing a given species and the variance of each species were estimated. The power law was applied to these estimates. The power law was used to evaluate the spatial heterogeneity and frequency of occurrence for each species in the grassland community. The lightly grazed grassland exhibited high spatial heterogeneity （caused by large plant size）, the highest species diversity, and a high occurrence of S. baicalensis. In contrast, the heavily grazed grassland exhibited high spatial heterogeneity （caused by patchy populations of small plant size）, low species diversity, and a low occurrence of S. baicalensis. We judged that the heavily grazed grassland was overgrazed and exclusion of livestock from the degraded areas is necessary for recovery.
英文关键词	degradation grazing intensity Heilongjiang China spatial heterogeneity species diversity steppe Stipa baicalensis
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2138501
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334900
作者单位	Mikinori Tsuiki, Faculty of Agriculture, lwate University, Japan.; Wang Yusheng, National Northeast Agricultural University, Harbin, Heilongjiang 150030, China.; Masae Shiyomi, National Northeast Agricultural University, Harbin, Heilongjiang 150030, China.; Yiruhan, Environmental Engineering Department, College of Science and Engineering, Jinan University, Guangzhou, GuangDong 510630, China.; Michio Tsutsumi, National Institute of Livestock and Grassland Science, Ecology Department, Japan.
推荐引用方式 GB/T 7714	Mikinori Tsuiki,Wang Yusheng,Yiruhan,等. Analysis of Grassland Vegetation of the Southwest Heilongjiang Steppe （China） Using the Power Law[J],2005,47(8):917-926.
APA	Mikinori Tsuiki,Wang Yusheng,Yiruhan,Michio Tsutsumi,&Masae Shiyomi.(2005).Analysis of Grassland Vegetation of the Southwest Heilongjiang Steppe （China） Using the Power Law.Journal of Integrative Plant Biology,47(8),917-926.
MLA	Mikinori Tsuiki,et al."Analysis of Grassland Vegetation of the Southwest Heilongjiang Steppe （China） Using the Power Law".Journal of Integrative Plant Biology 47.8(2005):917-926.