Biodiversity Science ›› 2014, Vol. 22 ›› Issue (5): 574-582.doi: 10.3724/SP.J.1003.2014.14116

• Orginal Article • Previous Article     Next Article

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

Siyuan Ren1, Ting Wang1, *(), Yan Zhu2, Yongzhong Ye1, Zhiliang Yuan1, Cong Li3, Na Pan1, Luxin Li1   

  1. 1 Henan Agricultural University, Zhengzhou 450002
    2 State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093
    3 Xinzheng Meteorological Bureau, Xinzheng, Henan 451100
  • Received:2014-06-06 Accepted:2014-09-28 Online:2014-10-09
  • Wang Ting

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

Fig. 1

Hypothesized phylogenetic relationship among 58 woody species of the deciduous broad-leaved forest in Baotianman National Nature Reserve"

Table 1

Mean pairwise phylogenetic distance (MPD) and net relatedness index (NRI) with different null models and different spatial scales in a 1-ha deciduous broad-leaved forest plot in Baotianman National Nature Reserve"

Mean MPD randomization
Mean MPD analysis
Null model
10 m×10 m 178.13 262.55 43.57 -1.97 约束型 Constrained
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
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
293.39 297.13 68.11 -0.04 非约束型 Unconstrained

Table 2

Mean nearest neighbor phylogenetic distance (MNND) and nearest taxon index (NTI) with different null models and different spatial scales in a 1-ha deciduous broad-leaved forest plot in Baotianman National Nature Reserve"

Mean MNND randomization
Mean MNND analysis
Null model
10 m×10 m 172.63 238.72 55.80 -1.110 约束型 Constrained
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
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
179.78 189.81 69.60 -0.034 非约束型 Unconstrained

Fig. 2

Net relatedness index (NRI) and nearest taxon index (NTI) with different null models and different spatial scales in a 1-ha deciduous broad-leaved forest plot in Baotianman National Nature Reserve. A1, A2, A3, a1, a2, a3 for unconstrained null models, and B1, B2, B3, b1, b2, b3 for constrained null models."

Table 3

The relationship of phylogenetic structure and DBH sizes and sample sizes in a 1-ha deciduous broad-leaved forest plot in Baotianman National Nature Reserve"

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

Fig. 3

Dynamics of NRI(a) and NTI(b) with different DBH sizes and different spatial scales (10 m×10 m, 20 m×20 m, 25 m×25 m) in a 1-ha deciduous broad-leaved forest plot in Baotianman National Nature Reserve.A, Small DBH class (1cm ≤ DBH < 5 cm); B, Middle DBH class (5 cm≤ DBH < 10 cm); C, Large DBH class (DBH≥10 cm)."

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