---

作 者 ：牛建明,李博

期 刊 ：生态学报 1992年 12卷 2期 页码：105~112

关键词：鄂尔多斯高原；植被分析；RA排序；生态因子；多元分析；

Keywords:the ordos plateau, vegetation analysis, RA ordination, ecological factor, multivariate analysis.,

摘 要 ：鄂尔多斯高原地处暖温性草原与荒漠的过渡地段,植被地带分异规律明显。本文在统计分析气候和植物群落数据的基础上,讨论了地带性植被、沙地植被和低湿地植被与生态因子的相互关系,并使之数量化。分析过程包括:(1)运用相互平均排序,将植物群落的空间分布概括到排序的两个主要向量上;(2)主要气候因子与经度、纬度、海拔的相关和逐步回归分析,获得任一样方的气候指标;(3)通过相关和逐步回归分析,描述排序得分与主要生态因子的相关性,从而数量表达植被分布与环境的关系。结果表明:年平均降水量和≥10℃的积温是影响高原植被分布的主导生态因子。低湿地植被深受大气候的影响,土壤全盐量为主导因子。

Abstract:The ordos plateau, where natural conditions are more complicated and vegetation zonalities are clear,is the transitional region from warm temperature steppe to desert. Relations between ecological factors and zonal vegetation, sandland vegetation, and lowland vegetation were discussed as well as these relations were expressed quantitatively in the paper by means of statistically analysing data of environments and of plant communities.The principal analysis contained three steps, 1. to summarize the spatial ...

---