鄂尔多斯高原覆沙坡地植物群落格局

 地貌对植物群落的空间格局具有重要的影响，覆沙坡地是鄂尔多斯高原常见的地貌类型，定量分析覆沙坡地植物群落的分布格局，有助于理解植被与环境之间的关系和制定恢复土地退化的有力措施。本文研究了鄂尔多斯高原覆沙坡地的植物群落格局，结果表明，在坡地的中上部分布着以本氏针茅（Stipa bungeana）、冷蒿（Artemisia frigida）、北丝石竹（Gypsophila davurica）等物种为主的典型草原群落，而在坡地的中下部则分布着以油蒿（Artemisia ordosica）为主的沙生植物群落。DCA

SPATIAL PATTERN OF THE PLANT COMMUNITY ALONG A SAND-COVERED HILLSLOPE IN ORDOS PLATEAU OF CHINA

Landform plays an important role in regulating the spatial pattern of plant community. Quantifying the spatial pattern of plant community along the sand_covered hillslope can give useful information about the relationship between vegetation and environment as well as making powerful measures of rehabilitations of the degraded land. In this paper, the spatial pattern of plant community along a sand_covered hillslope in Ordos Plateau of China was analyzed. The higher position was a typical steppe community dominated by Stipa bungeana , Artemisia frigida , and Gypsophila desertorum , while the lower position was a psammophytes' community dominated by Artemisia ordosica . First axis of DCA (Detrended Correspondence Analysis) was significantly correlated with the geomorphic position. In addition, first axis scores of DCA, as a useful index of species composition, showed strong spatial dependence.