Analysis on the construction and community phylogenetic structure of deciduous broad-leaved forest community in Baiyunshan nature reserve based on different modelsChinese Full Text
LI Peikun;WANG Xueying;WANG Ting;YAO Chengliang;YUAN Zhiliang;YE Yongzhong;College of Life Sciences,Henan Agricultural University;College of Forestry,Henan Agricultural University;Wumasi Forestry Farm in Songxian;
Abstract: This study is based on the data of the Xiaohuangshan 1 hm~2 dynamic monitoring Xiaohuangshan plot in the Baiyunshan Nature Reserve. The 1 hm~2 plot 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 spatialand 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 assumption. The NRI and NTI value calculated by the different models had an obvious positive correlation. 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 intensity 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 model. 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 Xiaohuangshan plot in Baiyunshan National Nature Reserve.
Keywords：
ecological transition zone; community composition; phylogenetic structure; habitat filtration;
- DOI：
10.16445/j.cnki.1000-2340.2018.01.009
- Series：
(D) Agriculture
- Subject：
Forestry
- Classification Code：
S718.5
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