干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠南部短命植物群落物种多样性及空间分异

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	古尔班通古特沙漠南部短命植物群落物种多样性及空间分异
其他题名	Species diversity and spatial differentiation of ephemeral plant community in southern Gurbantunggut Desert
	刘忠权; 刘彤; 张荣; 陈辉煌
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2011
卷号	30 期号:1 页码:45-52
中文摘要	短命植物是早春多雨,夏季干热环境而形成的特殊植物类型,古尔班通古特沙漠南部是短命植物集中分布区,对保持沙漠稳定,防风固沙起到重要作用.目前对短命植物群落多样性,生态功能以及空间分布等研究较少.本研究采用分层抽样方法,调查分析了古尔班通古特沙漠南部35个样点3.86*104m2的短命植物多样性特征.共发现93个物种,分属于24个科,74属,其中藜科(Chenopodiaceae),菊科(Compositae),十字花科(Crucif-erae)和豆科(Leguminosae)为优势科,分别占主要物种总数的19.35%,17.20%,11.83%和9.68%.从生活型来看,短命植物占53.76%,长营养期草本占22.58%,乔灌类占16.13%.从重要值上看,乔灌类占30.93%,短命植物占45.73%.短命植物的空间分异明显,在经向方面,短命植物物种数和重要值随着经度增加(由西向东)明显增加,长营养期草本和乔灌类的重要值则减小.在纬向方面,短命植物物种数和重要值随着纬度的增加(由南向北)而减小,长营养期草本和乔灌类的重要值增加,物种数变化不明显.去势典范对应分析(DCCA)发现,坡位,经纬度,年降水量和35月降水量对物种分布产生影响.采用双向指示种方法,将古尔班通古特沙漠南部短命植物分为7个群落.总结认为,随着古尔班通古特沙漠降水的增加,短命植物物种数和重要值将逐渐增大,但建群种白梭梭密度将逐渐减少
英文摘要	Ephemeral plants are a special type of plants living in an environment which is rainy in early spring and xerothermic in summer. In Gurbantunggut Desert, they are mainly distributed in the southern part, playing an important role in the maintenance of desert ecosystem stability and in sand-fixation. However, few studies have been done on their community diversity, ecological function, and spatial distribution. By adopting stratification sampling, this paper investigated the diversity feature of ephemeral plants at 35 sites covering a total area of 3.86*104 m2 in the southern Gurbantunggut Desert. A total of 93 ephemeral species were recorded, belonging to 24 families and 74 genera, among which, Chenopodiaceae, Compositae, Cruciferae, and Leguminosae were the dominant families, accounting for 19.35%,17.20%,11.83%, and 9.68% of the total species, respectively. In terms of life form, ephemeral plants, annuals with long period of nourishment, and trees and shrubs accounted for 53.76%,22.58%, and 16.13%, respectively. In terms of importance value, ephemeral plants accounted for 45.73%, while trees and shrubs accounted for 30.93%. Ephemeral plants had a distinct spatial differentiation. Their species number and importance value increased obviously with longitude (from west to east), but decreased with latitude (from south to north). Oppositely, annuals with long period of nourishment and trees and shrubs had a decreasing importance value with longitude (from west to east), and their importance value increased with latitude (from south to north) but species number had no distinct change with latitude. Detrended canonical correspondence analysis (DCCA) showed that the species distribution was greatly affected by slope position, longitude and latitude, annual precipitation, and the precipitation from March to May. Based on two-way indicator species analysis (TWINSPAN), the ephemeral plants in southern Gurbantunggut Desert were divided into seven communities. It was considered that, with the increase of the precipitation in Gurbantunggut Desert, the importance value and species number of ephemeral plants tended to increase, but the density of dominant species Haloxylon persicum would be decreased gradually
中文关键词	古尔班通古特沙漠 ; 去势典范对应分析 ; 双向指示种分析 ; 物种多样性
英文关键词	Gurbantunggut Desert detrended canonical correspondence analysis (DCCA) two-way indicator species analysis (TWINSPAN) species diversity
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:4120832
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226985
作者单位	石河子大学生命科学学院, 石河子, 新疆 832003, 中国
推荐引用方式 GB/T 7714	刘忠权,刘彤,张荣,等. 古尔班通古特沙漠南部短命植物群落物种多样性及空间分异[J]. 石河子大学,2011,30(1):45-52.
APA	刘忠权,刘彤,张荣,&陈辉煌.(2011).古尔班通古特沙漠南部短命植物群落物种多样性及空间分异.生态学杂志,30(1),45-52.
MLA	刘忠权,et al."古尔班通古特沙漠南部短命植物群落物种多样性及空间分异".生态学杂志 30.1(2011):45-52.