河南农业大学学报2018，Vol.52Issue(1)：50-58,9.
基于不同模型分析白云山落叶阔叶林群落系统发育结构及其构建机制
Analysis on the construction and community phylogenetic structure of deciduous broad-leaved forest community in Baiyunshan nature reserve based on different models
摘要
Abstract
This study is based on the data of the Xiaohuangshan 1 hm2dynamic monitoring Xiaohuang-shan plot in the Baiyunshan Nature Reserve. The 1 hm2plot was divided into quadrats at 3 spatial scales(10 m×10 m,20 m×20 m,25 m×25 m) and three DBH sizes (1 cm≤DBH<5 cm,5 cm≤DBH<10 cm,DBH≥10 cm).The three diameter classes represent the forest of the different ages.We estimated the phylogenetic structure by comparing observed phylogenetic distances among species with the distribution of phylogenetic distances under two different null models undergoing different spatial and time scales in the Xiaohuangshan plot in Baiyunshan National Nature Reserve.It was shown that, the intensity of phylogenetic clustering increased with the scaling in 10 m×10 m,20 m×20 m,25 m× 25 m at the deciduous broad-leaved forest community system in Baiyunshan.And the results show that habitat filtration has a significant effect on community construction. Meanwhile,the NRI and NTI in some of the quadrats appear both positive and negative values undergoing the different null model as-sumption.The NRI and NTI value calculated by the different models had an obvious positive correla-tion.In general,the unconstrained null model had the tendency of phylogenetic clustering,while the constrained null model had the tendency of phylogenetic overdispersion.At last,while the NRI and NTI value of small diameter and the mid-diameter gradually decreased,the large diameter community's in-tensity of phylogenetic clustering significantly increased.But the community's value of NRI and NTI gradually decreased from the small diameter to the large diameter class under the constrained null mod-el.The results suggested that phylogenetic habitat filtration is an important mechanism in regulating species diversity and shaping community structure at the deciduous broad-leaved forest in the Xiao-huangshan plot in Baiyunshan National Nature Reserve.关键词
生态过渡区/群落构建/谱系结构/生境过滤Key words
ecological transition zone/community composition/phylogenetic structure/habitat filtra-tion分类
农业科技引用本文复制引用
李培坤,王雪颖,王婷,姚成亮,袁志良,叶永忠..基于不同模型分析白云山落叶阔叶林群落系统发育结构及其构建机制[J].河南农业大学学报,2018,52(1):50-58,9.基金项目
河南省高等学校重点科研项目(18A180011) （18A180011）
河南省高等学校青年骨干教师培养计划项目(2016GGJS-032) （2016GGJS-032）
