干旱区生态环境知识资源中心(Arid): 塔里木河下游绿洲-荒漠过渡带植物多样性特征及优势种群分布格局

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	塔里木河下游绿洲-荒漠过渡带植物多样性特征及优势种群分布格局
其他题名	Species Diversity and Dominance Population Distribution Pattern in Oasis-Desert Ecotone
	周洪华; 陈亚宁; 李卫红
ISSN	1000-694X
出版年	2009
卷号	29 期号:4 页码:688-696
中文摘要	结合10个断面的30个样地野外调查结果,采用物种丰富度指数(R)、Shannon-Wiener指数(H)、Simpson优势度指数(D)、物种均匀度指数(J_(SW))、Whittaker指数、Cody指数、扩散系数(C)、负二项参数(K)、平均拥挤度(m~*)、丛生指标(I)、聚块性指标(PI)、Green指数(CA)、Cassie指标(GI) 综合分析了塔里木河下游绿洲-荒漠过渡带植物群落多样性及优势种群的空间分布格局.结果表明:塔里木河下游绿洲-荒漠过渡带优势种群为胡杨(Populus euphratica)、柽柳(Tamarix spp.)、黑果枸杞(Lycium ruthenicum)、盐穗木(Halostachys caspica)、花花柴(Karelinia caspica)、芦苇(Phragmites communis)、骆驼刺(Alhagi sparsifolia)、甘草(Glycyrrhiza inflata)、罗布麻(Apocynum hendersonii),受生境中水分条件的影响,各种群均呈聚集分布格局;各群落alpha-多样性指数低,物种多样性呈梯度变化,受环境水土资源条件限制,物种丰富度变化为:绿洲内>交错区>荒漠区;受地下水埋深的影响,群落结构呈规律性变化:乔-灌-草结构-灌-草结构-单一灌木结构-灌-草结构-乔-灌-草结构;Whittaker指数、Cody指数显示群落beta-多样性随着地下水埋深梯度发生变化,过渡带是绿洲和荒漠物种分布变化的分界地带.因此,地下水埋深是决定塔里木河下游绿洲-荒漠过渡带物种多样性和种群分布的决定因素.
英文摘要	Synthesis dominance rate (SDR), Richness index (R), Shannon-Wiener index (H), Simpson in-dex (D), Pielou index (J_(sw)), Whittaker index (beta_(wc)), Cody index (beta_c), Dispersion index (C), Negative bi-nomial parameter (K), Mean crowding intensity ( m* ), Clumping index (I), Patchiness index (PI), Cass-ie index (GI) and Green index (CA) are used to analyze the species diversity and dominance population dis-tribution pattern based on field surveying data from 30 plots along 10 sections at oasis-desert ecotone in the lower reaches of the Tarim River. The results showed that the structure and composition of these communi-ties were simple, the dominance populations were Populus euphratica, Tamarix chinensis Lour. , Lyci-urn ruthenicum, Halostachys caspic, Karelinia caspica, Phragmites communis, Alhagi sparsifolia, Glycyrrhiza inflate, Poacynum hendersonii, and they distributed in aggregative state in responding to groundwater depth. The alpha-diversity indices of these communities were low, and species diversity showed gradient change. The richness index followed the order: oasis> ecotone> desert due to water resource difference in microenvironment. From ecotone to desert, the community structure changed from tree-shrub-herbage to shrub-herbage to single shrub to shrub-herbage, and to tree-shrub-herbage due to change of groundwater depth. Suggested by Whittaker index and Cody index, the beta-diversity indices of these commu-nities changed with groundwater depth gradient, showing the ecotone was the boundary between oasis spe-cies and desert species distribution. Therefore, the groundwater depth was the decision factor for species di-versity and distribution pattern of dominance population at oasis-desert ecotone in the lower reaches of the Tarim River.
中文关键词	塔里木河下游 ; 绿洲-荒漠过渡带 ; 群落多样性 ; 分布格局 ; 优势种群
英文关键词	Tarim river oasis-desert ecotone community diversity distribution pattern dominance population
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:3757962
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/2XILL650/224564
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	周洪华,陈亚宁,李卫红. 塔里木河下游绿洲-荒漠过渡带植物多样性特征及优势种群分布格局[J]. 中国科学院新疆生态与地理研究所,2009,29(4):688-696.
APA	周洪华,陈亚宁,&李卫红.(2009).塔里木河下游绿洲-荒漠过渡带植物多样性特征及优势种群分布格局.,29(4),688-696.
MLA	周洪华,et al."塔里木河下游绿洲-荒漠过渡带植物多样性特征及优势种群分布格局".29.4(2009):688-696.