暖温带-北亚热带过渡带落叶阔叶林群落不同径级系统发育结构的变化

doi:10.3724/SP.J.1003.2014.14116

生物多样性 ›› 2014, Vol. 22 ›› Issue (5): 574-582. DOI: 10.3724/SP.J.1003.2014.14116

暖温带-北亚热带过渡带落叶阔叶林群落不同径级系统发育结构的变化

任思远¹, 王婷^1,^*(), 祝燕², 叶永忠¹, 李聪³, 潘娜¹, 叶永忠¹

1 河南农业大学, 郑州 450002
2 中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093
3 河南省新郑市气象局, 河南新郑 451100

收稿日期:2014-06-06 接受日期:2014-09-28 出版日期:2014-09-20 发布日期:2014-10-09
通讯作者: 王婷
基金资助:
国家自然科学基金(31270493)和中科院植物所植被与环境变化国家重点实验室2012年开放课题(LVEC-2012kf06)

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 Wang^1,^*(), Yan Zhu², Yongzhong Ye¹, Zhiliang Yuan¹, Cong Li³, Na Pan¹, Luxin Li¹

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:2014-09-20 Published:2014-10-09
Contact: Wang Ting

摘要/Abstract

摘要：

群落的系统发育结构能够有效地反映各种生态过程对群落组成的影响, 通过研究群落系统发育结构能推断出其形成的生态过程, 对于揭示群落动态具有重要意义。作者将宝天曼1 ha落叶阔叶林样地分为10 m×10 m、20 m×20 m、25 m×25 m三个尺度的样方, 将样地内乔木个体划分为小径级(1 cm ≤ DBH<5 cm)、中径级 (5 cm ≤ DBH<10 cm)、大径级(DBH ≥ 10 cm)三个径级, 通过比较各个阶段系统发育结构的变化, 来分析其群落系统发育结构的生态过程。不同零模型的比较发现, 宝天曼落叶阔叶林群落的净系统发育亲缘关系指数(net relatedness index, NRI)和最近种间亲缘关系指数(net nearest taxa index, NTI)值都随着研究尺度和径级的增加而降低, 表明该群落在不同时空尺度上都表现出群落系统发育结构发散, 而且系统发育密度制约对大径级个体的系统发育结构的影响大于小径级个体。上述结果说明密度制约是地处暖温带-亚热带过渡带的宝天曼落叶阔叶林群落物种多样性维持的重要机制。

关键词: 落叶阔叶林, 群落系统发育结构, 密度制约, 空间尺度, 径级

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

任思远, 王婷, 祝燕, 叶永忠, 李聪, 潘娜, 叶永忠 (2014) 暖温带-北亚热带过渡带落叶阔叶林群落不同径级系统发育结构的变化. 生物多样性, 22, 574-582. DOI: 10.3724/SP.J.1003.2014.14116.

Siyuan Ren, Ting Wang, Yan Zhu, Yongzhong Ye, Zhiliang Yuan, Cong Li, Na Pan, Luxin Li (2014) Phylogenetic structure of individuals with different DBH sizes in a deciduous broad-leaved forest community in the temperate-subtropical ecological transition zone, China. Biodiversity Science, 22, 574-582. DOI: 10.3724/SP.J.1003.2014.14116.

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链接本文: https://www.biodiversity-science.net/CN/10.3724/SP.J.1003.2014.14116

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

图/表 6

图1 宝天曼落叶阔叶林1 ha森林样地58种木本植物的系统发育关系

Fig. 1 Hypothesized phylogenetic relationship among 58 woody species of the deciduous broad-leaved forest in Baotianman National Nature Reserve

表1 宝天曼落叶阔叶林不同零模型和不同尺度下平均成对分类系统发育距离(MPD)和净相关指数(NRI)

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

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

表2 宝天曼落叶阔叶林不同零模型和不同尺度下平均最近系统发育距离(MNND)和最近邻体指数(NTI)

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

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

图2 不同尺度下不同零模型的宝天曼森林净相关指数(NRI)和平均最近邻体指数(NTI)。A1, A2, A3, a1, a2, a3为约束型零模型, B1, B2, B3, b1, b2, b3为非约束型零模型。

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.

表3 宝天曼落叶阔叶林群落系统发育结构指数与径级和尺度的关系

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
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

图3 宝天曼落叶阔叶林群落不同径级和不同尺度NRI(a)及NTI(b)的变化。横轴中A: 小径级1 cm ≤ DBH < 5 cm; B: 中径级5 cm ≤ DBH <10 cm; C: 大径级DBH ≥ 10 cm。

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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暖温带-北亚热带过渡带落叶阔叶林群落不同径级系统发育结构的变化

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

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