数据资源: 林业前沿资讯

Effects of Topography on Tree Community Structure in a Deciduous Broad-Leaved Forest in North-Central China



编号 010016905

推送时间 20190114

研究领域 森林生态

年份 2019

类型 期刊

语种 英文

标题 Effects of Topography on Tree Community Structure in a Deciduous Broad-Leaved Forest in North-Central China

第169期

发表时间 20190111

摘要   Topography strongly influences the compositional structure of tree communities and plays a fundamental role in classifying habitats. Here, data of topography and 16 dominant tree species abundance were collected in a fully mapped 25-ha forest plot in the Qinling Mountains of north-central China. Multivariate regression trees (MRT) were used to categorize the habitats, and habitat associations were examined using the torus-translation test. The relative contributions of topographic and spatial variables to the total community structure were also examined by variation partitioning. The results showed the inconsistency in association of species with habitats across life stages with a few exceptions. Topographic variables [a + b] explained 11% and 19% of total variance at adult and juvenile stage, respectively. In contrast, spatial factors alone [c] explained more variation than topographic factors, revealing strong seed dispersal limitation in species composition in the 25-ha forest plot. Thus, the inconsistent associations of species and habitats coupled with high portion of variation of species composition explained by topographic and spatial factors might suggest that niche process and dispersal limitation had potential influences on species assemblage in the deciduous broad-leaved forest in north-central China.

服务人员 王璐

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