Wetland plant species diversity in sandy land of a semi-arid inland region of China
Wetland plant species diversity in sandy land of a semi-arid inland region of China
复制标题
DOI：
10.1080/11263504.2012.737865
复制
发表时间：
2013-03-01
期刊：
影响因子：
2
通讯作者：
Yang, Jie
中科院分区：
文献类型：
--
作者：
Minggagud, Hugjiltu;Yang, Jie
半干旱内陆沙地上的小块湿地虽然经常被忽视，但却能支持多种植物群落类型，为当地和区域物种丰富度做出巨大贡献。本研究对毛乌素沙地湿地植被进行了全方位的描述，并比较了不同湿地植物群落类型的植物多样性和组成。毛乌素沙地湿地植被类型包括沼泽、湿草甸和盐草甸。采用聚类分析、优势种分析和非度量多维尺度排序等方法对植物群落类型进行识别和比较。毛乌素沙地植物区系有维管植物320余种，占毛乌素沙地植物区系的72.1%，而毛乌素沙地植物区系仅占毛乌素沙地面积的12.15%。平均11 +/- 1.75种/ m2，远高于沙丘周边。植物群落类型划分为6个类型，优势种为芦苇（Phragmites australis）、intersita Eleocharis intersita、Salix cheilophila、Carex duriuscula、Calamagrostis pseudoophragmites和Achnatherum splendens。非趋势对应分析（DCA）轴表示水和土壤盐度的梯度。6种类型的本地物种丰富度和组成变异均存在差异。湿地植物群落对景观多样性有重要贡献。
Though often ignored, small patches of wetland in sandy land within semi-arid inland regions can support diverse plant community types that greatly contribute to both local and regional species richness. This study characterizes the full range of wetland vegetation within the Mu Us sandy land, and compares the plant diversity and composition of different wetland plant community types. In the Mu Us sandy land, wetland vegetation types including swamps, wet meadows, and salt meadows were sampled. Clustering, dominant species analysis, and nonmetric multidimensional scaling ordination were applied to identify and compare plant community types. Over 320 species of vascular plants, comprising 72.1% of the Mu Us sandy land flora, were found in the wetland, which occupies only 12.15% of the area. Local diversity is 11 +/- 1.75 species per m2 on average, much greater than in the surrounding dune. Plant community types were classified into six types, whose dominant species were Phragmites australis, Eleocharis intersita, Salix cheilophila, Carex duriuscula, Calamagrostis pseudophragmites and Achnatherum splendens. The detrended correspondence analysis (DCA) axes represent gradients of water and soil salinity. Both local species richness and compositional variation differed among the six types. The plant assemblages of the wetland make important contributions to landscape-level diversity.