Phylogenetic structure of individuals with different DBH sizes in a deciduous broad-leaved forest community in the temperate-subtropical ecological transition zone, China

doi:10.3724/SP.J.1003.2014.14116

Abstract

Abstract:

Phylogenetic structure of a community could effectively reflect underlying ecological processes of a community. Understanding phylogenetic structure of a community will help reveal the ecological processes associated with community dynamics. Data in a 1-ha plot were divided into quadrats at three spatial scales (10 m×10 m, 20 m×20 m, and 25 m×25 m) and three DBH sizes (1 cm ≤ DBH<5 cm, 5 cm ≤ DBH<10 cm, DBH ≥ 10 cm) to compare phylogenetic structures and to infer ecological processes of the community in a deciduous broad-leaved forest in the Baotianman National Nature Reserve. It was shown that NRI (net relatedness index) and NTI (net nearest taxa index) decreased with increasing spatial scales and DBH sizes. These results indicated that, phylogenetic structure of this community were overdispersed at different spatial scales and DBH sizes; and phylogenetic density dependence exerted higher effect on lager DBH classes than smaller ones. Our results suggested that phylogenetic density dependence is an important mechanism in regulating species diversity and shaping community structure of the deciduous broad-leaved forest in the temperate-subtropical ecological transition zone of China.

Key words: deciduous broad-leaved forest, phylogenetic structure, density dependence, spatial scale, DBH sizes

Siyuan Ren, Ting Wang, Yan Zhu, Yongzhong Ye, Zhiliang Yuan, Cong Li, Na Pan, Luxin Li. Phylogenetic structure of individuals with different DBH sizes in a deciduous broad-leaved forest community in the temperate-subtropical ecological transition zone, China[J]. Biodiv Sci, 2014, 22(5): 574-582.

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URL: https://www.biodiversity-science.net/EN/10.3724/SP.J.1003.2014.14116

https://www.biodiversity-science.net/EN/Y2014/V22/I5/574

Figures/Tables 6

References 38

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尺度 Scale	MPD平均随机值 Mean MPD randomization	MPD平均实际测量值 Mean MPD analysis	标准差 SD	净相关指数 NRI	零模型 Null model
10 m×10 m	178.13	262.55	43.57	-1.97	约束型 Constrained
10 m×10 m	263.58	262.55	84.12	0.03	非约束型 Unconstrained
20 m×20 m	196.36	288.74	41.59	-2.20	约束型 Constrained
20 m×20 m	286.36	288.74	71.55	-0.01	非约束型 Unconstrained
25 m×25 m	201.98	297.13	40.38	-2.27	约束型 Constrained
25 m×25 m	293.39	297.13	68.11	-0.04	非约束型 Unconstrained

尺度 Scale	MPD平均随机值 Mean MPD randomization	MPD平均实际测量值 Mean MPD analysis	标准差 SD	净相关指数 NRI	零模型 Null model
10 m×10 m	178.13	262.55	43.57	-1.97	约束型 Constrained
10 m×10 m	263.58	262.55	84.12	0.03	非约束型 Unconstrained
20 m×20 m	196.36	288.74	41.59	-2.20	约束型 Constrained
20 m×20 m	286.36	288.74	71.55	-0.01	非约束型 Unconstrained
25 m×25 m	201.98	297.13	40.38	-2.27	约束型 Constrained
25 m×25 m	293.39	297.13	68.11	-0.04	非约束型 Unconstrained

尺度 Scale	MNND平均随机值 Mean MNND randomization	MNND平均实际测量值 Mean MNND analysis	标准差 SD	最近邻体指数 NTI	零模型 Null model
10 m×10 m	172.63	238.72	55.80	-1.110	约束型 Constrained
10 m×10 m	231.88	238.72	89.65	0.007	非约束型 Unconstrained
20 m×20 m	141.09	199.81	49.40	-1.170	约束型 Constrained
20 m×20 m	188.50	199.81	74.82	-0.024	非约束型 Unconstrained
25 m×25 m	133.57	189.81	47.05	-1.180	约束型 Constrained
25 m×25 m	179.78	189.81	69.60	-0.034	非约束型 Unconstrained

尺度 Scale	MNND平均随机值 Mean MNND randomization	MNND平均实际测量值 Mean MNND analysis	标准差 SD	最近邻体指数 NTI	零模型 Null model
10 m×10 m	172.63	238.72	55.80	-1.110	约束型 Constrained
10 m×10 m	231.88	238.72	89.65	0.007	非约束型 Unconstrained
20 m×20 m	141.09	199.81	49.40	-1.170	约束型 Constrained
20 m×20 m	188.50	199.81	74.82	-0.024	非约束型 Unconstrained
25 m×25 m	133.57	189.81	47.05	-1.180	约束型 Constrained
25 m×25 m	179.78	189.81	69.60	-0.034	非约束型 Unconstrained

尺度 Scale (m)	模型 Model	χ²	df	P
10 m×10 m	NRI vs. DBH	30.19	2	<0.0010
10 m×10 m	NTI vs. DBH	34.50	2	<0.0010
20 m×20 m	NRI vs. DBH	3.92	2	0.1409
20 m×20 m	NTI vs. DBH	14.78	2	0.0006
25 m×25 m	NRI vs. DBH	7.15	2	0.0280
25 m×25 m	NTI vs. DBH	12.64	2	0.0020
径级 DBH class
A (1 cm≤DBH< 5 cm)	NRI vs. scale	0.93	2	0.6384
A (1 cm≤DBH< 5 cm)	NTI vs. scale	6.51	2	0.0386
B (5 cm≤DBH<10 cm)	NRI vs. scale	3.69	2	0.1574
B (5 cm≤DBH<10 cm)	NTI vs. scale	0.81	2	0.6671
C (DBH≥10 cm)	NRI vs. scale	5.85	2	0.0538
C (DBH≥10 cm)	NTI vs. scale	2.61	2	0.2712