干旱区生态环境知识资源中心(Arid): 干旱区山地植物群落物种多样性与生产力关系分析

Arid

	干旱区山地植物群落物种多样性与生产力关系分析
其他题名	Analysis on the Relationship between the Species Diversity and the Productivity of Plant Communities in the Arid Mountainous Regions in China
	尚占环 1; 姚爱兴 2; 龙瑞军 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2005
卷号	22 期号:1 页码:74-78
中文摘要	在我国典型干旱山地系统中,对3个典型生境类型(沙化草地、土质阴坡、石质阴坡)的植物群落进行取样,分析植物群落多样性与其生产力关系.结果表明,3个生境条件下,3种多样性指数(Shannon-wienner指数、Simpson指数、Margalef丰富度指数)与生产力的线性关系拟合结果较好,说明干旱山地植物物种多样性与其生产力关系是线性关系.该地区处于长期过度放牧利用状态下,因此,物种多样性与生产力的线性关系是生境资源限制和长期过度干扰共同作用的结果.
英文摘要	In this paper, the relationship between the species diversity and the productivity of plant communities is researched by analyzing the samples collected from 3 typical habitats including the desertified steppe community, soil-sloped steppe community and community and rocky-sloped steppe community among the typical arid mountainous habitats in China. The experimental area (37°15’N, 105"3l’E, 1 300-2 100 m a. s. 1.) is located in the juncture of Zhongwei, Tongxin and Zhongning counties, Ningxia Hui Autonomous Region, and it is a mountainous region. It belongs to the continental climate, the average annual temperature is 9.27 ℃, the extremely maximum and minimum temperatures are 37. 6 ℃ and 22. 7 ℃ respectively; the annual precipitation and evaporation are 189.35 mm and 1979.58 mm respectively; the average relative humidity is 56. 67%, and the frost-free period is 158. 83 days. The region is rich in sunshine, but sand drift disasters occur frequently, and the period of plant growth is short. The desert steppes and semi-desert steppes are dominant, and the region is a degenerated steppe ecosystem "with a long grazing history. The results show that, under the 3 habitats, there is a good regression between the linear relationships of 3 indexes (Shannon-wienner index, Simpson index and Margalef richness index) of species diversity and the productivity, which reveals that the relationship between the species diversity of the arid mountainous plant communities and the productivity is linear. In the study area, the linear relationship between the species diversity and the productivity is the result jointly affected by the limitation of natural resources in the habitats and the excessive disturbance because the excessive grazing exists all along.
中文关键词	干旱区 ; 山地 ; 草地群落 ; 物种多样性 ; 生物生产力
英文关键词	arid area mountainous region steppe community species diversity biological productivity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ANTHROPOLOGY
WOS研究方向	Anthropology
CSCD记录号	CSCD:1878227
来源机构	甘肃农业大学 ; 宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206218
作者单位	1.甘肃农业大学,草业学院, 兰州, 甘肃 730070, 中国; 2.宁夏大学,草业科学研究所, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	尚占环,姚爱兴,龙瑞军. 干旱区山地植物群落物种多样性与生产力关系分析[J]. 甘肃农业大学, 宁夏大学,2005,22(1):74-78.
APA	尚占环,姚爱兴,&龙瑞军.(2005).干旱区山地植物群落物种多样性与生产力关系分析.干旱区研究,22(1),74-78.
MLA	尚占环,et al."干旱区山地植物群落物种多样性与生产力关系分析".干旱区研究 22.1(2005):74-78.