干旱区生态环境知识资源中心(Arid): 策勒绿洲外围不同地下水埋深下主要优势植物的分布和群落特征

Arid

	策勒绿洲外围不同地下水埋深下主要优势植物的分布和群落特征
其他题名	Distribution of dominant plant species and characteristic of its communities on the foreland of Cele Oasis in relation to groundwater level
	李向义; 林丽莎; 赵强
ISSN	1000-6060
出版年	2009
卷号	32 期号:6 页码:906-911
中文摘要	对塔克拉玛干沙漠南缘策勒绿洲外围地下水埋深与主要优势植物分布和群落特点的研究结果表明,植物的分布和群落特征受地下水埋深变化的影响.但群落的组成成分和生物多样性受到地貌特征和地下水埋深的双重影响.群落的差异性和间断性大于群落的连续性和相似性.群落分布随地下水埋深的变化与其他荒漠地区在大的空间演替规律上相一致,但在群落类型、特别是低水位地段群落演替序列上有明显不同.随着地下水埋深的变化,植物群落依次为:低水位的骆驼刺群落,较低水位的柽柳群落,中低水位的柽柳、胡杨群落,较高水位的芦苇群落,高水位的苦豆子群落,其中地下水埋深6.0 m以上地段是植物群落类型、种类组成和生物多样性都较为丰富的地区.绿洲外围植物中柽柳具有最大的环境资源利用比率,对环境的适应性最强.
英文摘要	Indigenous vegetation in the foreland of river oases at the extremely arid southern margin of the Taklimakan desert in Xinjiang, northwest China, is dominated by a few perennial plant species. As the population of the oases exploits the vegetation by harvest of construction wood, fuel and livestock feed, and by grazing of sheep and goats; indigenous vegetation plays an important role in the ecology and agro-economic system of the oases. In the foreland of river oases at this region, mean annual precipitation is less than 50 mm, since water was shifted to the oasis agricul- ture flooding reached rarely in the foreland, groundwater must have played a key role for plant survival. The hypothe-ses that distribution of dominant plant species and characteristics of its communities related to groundwater level were tested. The research was conducted at northeast area of Cele (Qira) River oasis. Ten transects were established at different groundwater level from 15.7 m to 0.9 m. The dominant species of Tamarix ssp. , Populus euphratica Oliv. , Alhagi sparsifolia Shap. , Karelinia caspica, Scorzonera divaricata, Phragmites communis (Cav. ) Steudel, and So-phora alope croides were present at these transects. In each transect, groundwater level was measured at each well once a month during the year (2004). Near the wells, 3-4 plots were chosen to investigate characteristics of plant community. The values of density, coverage, frequency, height, important value, and niche breadth, etc were inves-tigated and calculated. The results show that variations of groundwater level impacted distributions and characteristics of dominant plant communities. However, in addition to groundwater level, the community composition and species diversity were also influenced by physiognomy. Comparing the similarity coefficient, the differences between dominant plant communities were very significant under different groundwater level. Comparing other results on desert vegeta-tion to groundwater level, variations of community distribution was similar in big spatial scale. However, there were significant differences in community type and community succession, especially under the condition of very low groundwater level. With groundwater level rising from down to up, these communities transformed from Alhagi com-munity with the lowest groundwater level, Tamarix ssp. community with low groundwater level, Populus community with middle groundwater level, Phragmites community with high groundwater level, to Sophora community with the highest groundwater level. The groundwater level being up to 6.0 m, the community type, composition and species diversity were obviously increased. For the dominant species, niche breadth exhibited the biggest efficiency of re-source utilization in Tamarix, which means that it had best adaptability to environment in foreland of the oasis.
中文关键词	塔克拉玛干沙漠 ; 地下水埋深 ; 群落特征 ; 生态位
英文关键词	the Taklimakan Desert groundwater level community characteristic niche
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3841512
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223580
作者单位	中国科学院,新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	李向义,林丽莎,赵强. 策勒绿洲外围不同地下水埋深下主要优势植物的分布和群落特征[J]. 中国科学院新疆生态与地理研究所,2009,32(6):906-911.
APA	李向义,林丽莎,&赵强.(2009).策勒绿洲外围不同地下水埋深下主要优势植物的分布和群落特征.,32(6),906-911.
MLA	李向义,et al."策勒绿洲外围不同地下水埋深下主要优势植物的分布和群落特征".32.6(2009):906-911.