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塔里木河下游典型绿洲边缘物种多样性特征和种群分布格局/Species Diversity and Population Distribution in Edge of Typical Oasis of the Lower Reaches of Tarim River[J]
Authors
LIU Xin-hua
WANG Wei
+9 more
XU Hai-liang
ZHAO Xin-feng
中国科学院新疆生态与地理研究所,新疆乌鲁木齐,830011
中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011
中国科学院绿洲生态与荒漠环境重点实验室,新疆乌鲁木齐830011
刘新华
徐海量
王炜
赵新风
Publication date
1 January 2011
Publisher
Abstract
2008年夏季采用样带样方法对塔里木河下游典型绿洲边缘7个断面进行植被调查,采用α多样性指数(丰富度指数、Shannon-Wiener多样性指数、Simpson优势度指数和Pielou均匀度指数)和β多样性指数(Whittacker指数和Cody指数)分析环境梯度下种群多样性变化规律,利用种群分布格局指标(扩散系数、负二项参数、平均拥挤度、丛生指标和聚块性指标)定量分析绿洲边缘10个植物种群格局特征.结果表明:塔里木河下游典型绿洲边缘物种多样性特征受到土壤水分、盐分等因素限制,物种丰富度整体处于较低水平;α多样性指数表现为绿洲>过渡带>流动沙丘;从绿洲、过渡带到流动沙丘β多样性指数呈下降趋势;种群分布格局分析结果表明绿洲边缘10个植物种群均呈聚集分布,集群分布状态反映了干旱区植物种群对生存环境的适应特征
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016