干旱区生态环境知识资源中心(Arid): 中国黑戈壁植物多样性分布格局及其影响因素

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	中国黑戈壁植物多样性分布格局及其影响因素
其他题名	Plant distribution patterns and the factors influencing plant diversity in the Black Gobi Desert of China
	王健铭 1; 董芳宇 1; 巴海·那斯拉 1; 李景文 1; 李俊清 1; 冯益明 2; 卢琦2
来源期刊	生态学报
ISSN	1000-0933
出版年	2016
卷号	36 期号:12 页码:3488-3498
中文摘要	我国西北地区内陆分布着近20万km~2的黑戈壁,由于其环境的特殊性,使其具有独特的生态系统,境内分布着多样的植被,蕴藏着大量特有的自然资源。但由于自然环境苛刻与交通条件不便,目前我国关于黑戈壁区系统的植被与物种多样性的研究还很缺乏。针对黑戈壁区植物多样性组成与分布特点,基于遥感及实地调查,采用DCCA 排序和半变异函数模型等分析方法,对黑戈壁区植物群落组成,植物多样性特点及影响因素进行分析。研究结果表明:研究区植物以藜科和蒺藜科灌木或半灌木为主,群落物种生活型具有逐渐趋于简单甚至单一的特性,重要值>0.1的植物主要有梭梭、红砂、白刺等13种;群落物种多样性呈现区域性的斑块化分布,结构性因子引起的物种多样性空间异质性占主导地位;作为极端干旱区,该区植物群落类型具有贫乏化及单一化的趋势,群落结构简单,植被覆盖度低,植物生长随环境的变化具有明显的可塑性,群落空间分异明显,群落空间演变具有明显的水分及土壤结构梯度;DCCA 结果显示气候、土壤、地形是群落物种及类型变化的主要原因,海拔、坡位、土壤机械组成、降水、温度等环境因子对群落有着显著的影响,水土条件的空间异质性是戈壁植物多样性维持的关键因素。
英文摘要	The Black Gobi Desert covers a large area in the northwest of China, with a total area of about 200,000 km~2. The general climate of the Black Gobi can be characterized as having a high evaporative demand, with variable but low precipitation, making it the most arid region of the country′s dryland areas. Nevertheless, despite being considered the most dry and bare ecosystem in the world, it is affluent in natural resources. Because of its harsh environment and poor accessibility, systematic studies of plant diversity in the Black Gobi Desert are lacking. Understanding the underlying causes of geographic plant diversity gradients in arid and semiarid regions is important for the conservation and sustainable use of biodiversity there. However, the underlying mechanisms behind the Black Gobi Desert′s plant diversity patterns are still elusive. Therefore, the aim of our study was to analyze the plant community composition, as well as the species diversity of the Black Gobi ecosystem. We sampled 174 plots across the Black Gobi to demonstrate the vegetation pattern and its relationship with the environmental factors. We observed a trend of the plant communities becoming poorer and simpler in composition while vegetation cover decreases. Moreover, the overall structure and composition of the plant communities were simple, the majority of plants having an importance value lower than 0.1. The plant communities consisted mainly of Haloxylon ammodendron, Reaumuria songarica, Nitraria tangutorum, and 10 other species. Species diversity showed non-significant latitudinal and longitudinal trends, but was significantly influenced by climate, elevation, and topography. In addition, structural factors were most important in determining the spatial variation of species diversity. The result of a detrended cross-correlations analysis (DCCA) indicated that climate, elevation, topography, soil texture, and surface cover had a significant effect on community composition and plant distribution. Overall, the vegetation spanned a gradient in elevation,soil texture and water availability. Plant species are limited by water availability, and it should be noted that plant community composition was strongly related to changes in elevation, which influence soil texture and water availability. In sum, the spatial heterogeneity of the soil texture and water availability were the main factors to determine plant distribution and species diversity.
中文关键词	黑戈壁 ; 植物群落 ; 物种多样性 ; 分布 ; 因素
英文关键词	Black Gobi plant communities species diversity plant distribution spatial heterogeneity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5741820
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234788
作者单位	1.北京林业大学林学院, 北京 100083, 中国; 2.中国林业科学研究院荒漠研究所, 北京 100091, 中国
推荐引用方式 GB/T 7714	王健铭,董芳宇,巴海·那斯拉,等. 中国黑戈壁植物多样性分布格局及其影响因素[J]. 北京林业大学,2016,36(12):3488-3498.
APA	王健铭.,董芳宇.,巴海·那斯拉.,李景文.,李俊清.,...&卢琦.(2016).中国黑戈壁植物多样性分布格局及其影响因素.生态学报,36(12),3488-3498.
MLA	王健铭,et al."中国黑戈壁植物多样性分布格局及其影响因素".生态学报 36.12(2016):3488-3498.