中文摘要：

地形学和空间是在森林社区决定植物种类集合的二个重要因素。在决定种类分发的这二个因素的贡献的 Quantification 帮助我们在决定种类集合评估他们的相对重要性。这研究试图在一个副热带的混合森林里在 14 主导的种类的分布上解开地形学和空间的效果。枪兵关联分析和花托翻译测试被用来测试 specieshabitat 协会。变化划分被用来确定在三采样规模和三个生活阶段的地形学和空间的相对贡献。关联分析和花托翻译测试证明种类丰富主要与地志的湿索引被相关，从隧道网络和凸状的垂直距离。变化划分证明纯地形学，纯空间和空间地结构化的地形学解释了大约 2.1 ?% ， 41.2 ?% 并且 13.8 ? 在种类分布的变化的 % 分别地。为九种，全部的地形学部分在 20 m 空铅达到顶点。为十种，纯空间部分在 50 m 空铅达到顶点。为许多种类，全部的地形学部分和纯空间部分为最丰富的生活阶段是更大的，它反映了采样效果的重要性。然而，一些盒子没跟随建议象产地过滤那样的生态的过程的效果，密度依赖或疏开限制可以超过采样效果的这个趋势。在结论，我们发现空间地结构化的地形学和纯空间首先塑造了主导的树种类的分发。而且，他们的效果两个都是规模 -- 并且生活阶段依赖者。

英文摘要：

Topography and space are two important factors determining plant species assemblages in forest communities. Quantification of the contribution of these two factors in determining species distribution helps us to evaluate their relative importance in determining species assemblages. This study aims to disentangle the effect of topography and space on the distributions of 14 dominant species in a subtropical mixed forest. Spearman correlation analysis and the torus- translation test were used to test the species-habitat associa- tions. Variation partitioning was used to quantify the relative contributions of topography and space at three sampling scales and three life stages. Correlation analyses and torus-transla- tion tests showed species abundance was mostly correlated with topographic wetness index, vertical distance from the channel network and convexity. Variation partitioning showed that pure topography, pure space and spatially struc- tured topography explained about 2.1%, 41.2 % and 13.8 % of the variation in species distributions, respectively. For nine species, total topography fractions peaked in 20 m quadrats. For ten species, the pure space fractions peaked in 50 m quadrats. For many species, the total topography fraction and the pure space fraction were larger for the most abundant life stages, which reflected the importance of sampling effect. However, some cases did not follow this trend suggesting that the effects of ecological processes such as habitat filtering, density dependence or dispersal limitation may exceed the sampling effects. In conclusion, we found that spatially structured topography and pure space primarily shaped the distribution of dominant tree species. Furthermore, their effects were both scale- and life stage-dependent.