干旱区生态环境知识资源中心(Arid): 塔里木河下游物种多样性恢复速率分析

Arid

	塔里木河下游物种多样性恢复速率分析
其他题名	Restorable rates of species diversity in the lower reaches of the Tarim River
	刘加珍; 陈亚宁; 陈永金
ISSN	1000-6060
出版年	2008
卷号	31 期号:6 页码:870-877
中文摘要	通过塔里木河下游生态输水后植物群落及其环境因子的系统取样调查，采用beta多样性指数，从时空维上分析了生境差异与物种的恢复速率差异。结果表明：物种多样性差异与环境水分条件有着密切的关系，在地下水埋深小于5m时，物种恢复速率的发生率达100％，而在地下水埋深大于5m时；多样性恢复的率达46％。生境异质性较高的群落，水分条件较好，其物种恢复速率相对较高，表现为河边低地、地表未起沙生境与人工灌溉生境具有较高的物种恢复速率。生态恢复过程中，人类的干预对局部生境中物种多样性恢复产生了一定的影响，但物种替代速率与恢复速率的大小最终决定于水分条件的可利用性与环境劣变程度。
英文摘要	Lying in the Desert from the west to southern Xinjiang Province, Tarim River runs through the northern edge of the Taklimakan the east, and the main stream from the Xiaojake to Taitema Nor, with the length of 1 321 km. However, the degradation of riparian vegetation at the lower reaches in the last 50 years has been due to im- poundments and diversions of surface water and the removal of groundwater for human use at the upper stream of the river basin. Since 2000, the eco-water had been transported to the dry riverway for restoring the riparian vegetation and controlling desertification. The restorable rates of species diversity and species turnover rates during the five years of water transporting are the main concern of this paper. The beta diversity on spatial and temporal dimension, calculated with the Cody index, were used as species turnover rates and restorable rates of plant communities in the study area. The results showed as follows： the species restorable rates of herbaceous plants had influence on diversity of plant communities ; the species turnover rates and restorable rates were related with water conditions of environment ; when the mean annual depths of groundwater ranged between 0 and 5 m, the incident rate of restoration of species diversity reached at 100%, and while the mean annual depths of groundwater were greater than 5 m, restoration rate of species diversity reached at 46%, which means that the restorable rates of species diversity were high in the environments with high groundwater level and high soil moisture, where habitat heterogeneity showed by species turnover rates was high; so the high restorable rates of species diversity appeared at fluvial bog, non-sanded habitats and irrigated habitats. Overall, during the five years of ecological restoration, favorable or unfavorable human disturbance had influence on restoration of species diversity at some habitats but the magnitude of species turnover rate and restorable rate depended on degraded extent of environment and available extent of water.
中文关键词	生态恢复 ; 植物群落 ; 物种替代速率 ; 物种恢复速率 ; 干旱内陆河
英文关键词	ecological restoration plant communities species turnover rates species restorable rates arid continental river
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIODIVERSITY CONSERVATION
WOS研究方向	Biodiversity & Conservation
CSCD记录号	CSCD:3453396
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222294
作者单位	中国科学院, 中科院绿洲生态与荒漠环境重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	刘加珍,陈亚宁,陈永金. 塔里木河下游物种多样性恢复速率分析[J],2008,31(6):870-877.
APA	刘加珍,陈亚宁,&陈永金.(2008).塔里木河下游物种多样性恢复速率分析.,31(6),870-877.
MLA	刘加珍,et al."塔里木河下游物种多样性恢复速率分析".31.6(2008):870-877.