摘要：Plant trait patterns contribute to understanding the process of community assembly. Using a traitbased method, recent studies have found that, both the spatial component and abiotic environment filtering drives community structuring. However, the community abiotic environment may be influenced by overstory community and species composition, and it is not enough to disentangle the environment filters only considering abiotic factors. In this paper, leaf size and SLA of 11 understory species were measured, and variation portioning was used to explore the explanation power of spatial process, three topographic variables and seven biotic factors describing the overstory community. The results indicated spatial structure, topography and overstory characters contribute to the leaf variation, and biotic environment have significant effects on leaf trait variations. We concluded that community structure and species composition play important roles in community trait patterns, and biotic filtering should be considered in future trait-based studies.
关键词：Plant functional trait;Environment filtering;Space process;Understory species
