---

作 者 ：陈仲新, 张新时

期 刊 ：植物生态学报 1996年 20卷 5期 页码：423-437

关键词：毛乌素；景观生态类型；排序；分类；演化模；

Keywords:Maowusu, Landscape ecological type, Classification, Ordination, Successional module,

摘 要 ：本文通过对毛乌素沙地景观生态数据的处理与分析，以广泛应用于植被科学的数量分类方法TWINSPAN为工具，对毛乌素沙地景观生态类型进行了自上而下的等级式的数量分类研究，并与实际情况相结合，提出了毛乌素沙化草地景观生态分类系统。然后又利用算法上与TWINSPAN相似的DCA对沙化草地景观生态类型进行了排序分析，并与数量分类结果相结合，辅以逐步回归分析等多元分析方法，对所划分的各景观生态类型之间的关系进行了分析与探讨，指出毛乌素沙化草地具有较为丰富的景观生态类型，地下水位，覆沙厚度，基质类型控制着沙化草地景观生态类型的发生与演化；提出了毛乌素沙化草地景观生态的演化模式。本文还表明，TWINSPAN和DCA是景观生态研究比较有效的数量分析方法。

Abstract:Maowusu sandy grassland is an ecotone in the transitional zone of animal husbandry and agriculture in North China. In this study, a quantitative hierarchical classification is committed on the sandy grassland landscape ecological elements with TWINSPAN, which is widely used in vegetation science. Then a sandy grassland ecological classification system is drawn. DCA, which has a similar algorithm in comparison with TWINSPAN, is applied in the ordination of sandy grassland landscape ecological elements. Other multivariate analysis such as stepwise regression is done to clarify the relationship between the classified landscape ecological types. Maowusu sandy grassland is rich in landscape ecological types. Groundwater-table, sand depth, and parent material types are the key factors controlling the genesis and succession of the landscape ecological types. Finally a landscape ecological succession module of Maowusu sandy grassland is given. According to this research, TWINSPAN and DCA are useful in landscape ecological quantitative classification and ordination.

---