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首页> 外文期刊>Chinese science bulletin >Spatial patterns of ephemeral plants in Gurbantunggut Desert
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Spatial patterns of ephemeral plants in Gurbantunggut Desert

机译：古尔班通古特沙漠临时植物的空间格局

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摘要

In the present research, the authors measured parameters of richness, cover and importance value of ephemeral and ephemeroid plants on south-north and east-west transects in the Gurbantunggut Desert in early spring, and investigated and analyzed the microhabitats, such as terrain, geomorphology, soil physical-chemical properties and crusts. By comparison, the regional differences in the ephemeral distribution in the desert were revealed. The species of ephemeral plants in the south and center are therichest and those in the west are the poorest in the desert. The cover of ephemeral plants in the mid-south is higher than that in the north, and that in the mid-east is higher than that in the west. The response of ephemeral plants to the spatial variation of the desert habitat forms the population-habitat gradient of ephemeral plants. The characteristics are: (1) In the habitat with higher terrain, coarser textured soil with poorer sorting and correspondingly higher organic matter and lower alkali-saline contents, Carex physoides and Eremopyrum orientate are the dominant ephemeral plants; (2) In the dry habitat with lower terrain, looser textured soil, some organic matter, alkali-saline soil, and developed crust, the ephemeral plants Alyssum linifolium and Erodium oxyrrhynchum are of characteristic of drought and alkali-saline tolerance; (3) In the habitat with lower terrain, some water and more alkali-saline soil, the ephemeral plants Neotorularia torulosa and Hypecoum parviflorum being of alkali-saline tolerance are mainly developed. However, most ephemerals are distributed in a habitat order of higher terrain, some organic, and less alkali-saline soil on the above-mentioned ephemeral population-habitat gradient. The spatial gradient of variation in desert microhabitats is small, and as a whole, the physiological character of mesophytism is represented by the desert ephemerals.
机译：在本研究中，作者测量了早春古尔班通古特沙漠南北和东西方样带的短暂和星表类植物的丰富度，覆盖度和重要性值的参数，并调查和分析了地形，地貌等微生境。 ，土壤理化性质和地壳。通过比较，揭示了沙漠短暂分布的区域差异。南部和中部的短暂植物种类最丰富，而西部的短暂植物种类最稀少。南部中部的短暂植物的覆盖率高于北部，而中东中部的覆盖率高于西部。短暂植物对沙漠生境空间变化的响应形成了短暂植物的种群-栖息地梯度。其特点是：（1）在地形较高的生境中，质地较粗的土壤，分类较差，有机物含量较高，碱盐含量较低，Carex physoides和Eremopyrum Orientate是主要的短暂植物; （2）在地势较低，质地较疏松，有机质较弱，盐碱土，地壳发达的干旱生境中，短命植物香雪球和草香具有耐旱，耐盐碱的特点; （3）在地形较低，水多，盐碱土多的生境中，主要发育耐盐碱的短命植物新托莱乌拉菌（Tororosa torulosa）和小叶小花草（Hypecoum parviflorum）。但是，在上述短暂种群-栖息地梯度上，大多数临时植物以较高的地形，一些有机的和较少的碱盐土的栖息地顺序分布。沙漠微生境的变化空间梯度很小，并且总体上，中生植物的生理特征以沙漠短暂植物为代表。

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