生物多样性 ›› 2023, Vol. 31 ›› Issue (9): 23147. DOI: 10.17520/biods.2023147
王明慧1,2,3, 陈昭铨1,3, 李帅锋1,3, 黄小波1,3, 郎学东1,3, 胡子涵1,3, 尚瑞广1,3, 刘万德1,3,4,*()
收稿日期:
2023-05-09
接受日期:
2023-08-23
出版日期:
2023-09-20
发布日期:
2023-10-13
通讯作者:
*E-mail: liuwande@126.com
基金资助:
Minghui Wang1,2,3, Zhaoquan Chen1,3, Shuaifeng Li1,3, Xiaobo Huang1,3, Xuedong Lang1,3, Zihan Hu1,3, Ruiguang Shang1,3, Wande Liu1,3,4,*()
Received:
2023-05-09
Accepted:
2023-08-23
Online:
2023-09-20
Published:
2023-10-13
Contact:
*E-mail: liuwande@126.com
摘要:
物种的空间分布格局和种群结构受生境过滤、扩散限制、种内和种间相互作用等多重过程的影响。研究物种的空间分布格局、物种关联及其与环境因子的关系, 有利于揭示生物多样性维持机制, 探索群落稳定演替的生态过程。季风常绿阔叶林作为我国热带-亚热带交错区典型的地带性植被类型, 是研究交错区物种空间分布格局的重要平台。本研究基于普洱30 ha季风常绿阔叶林动态监测样地的调查资料, 采用点格局分析的方法, 对3种不同种子扩散方式的优势种即短刺锥(Castanopsis echidnocarpa)、茶梨(Anneslea fragrans)、西南桦(Betula alnoides)的空间分布格局及其随尺度的变化进行研究, 分析了生境过滤和扩散限制对物种空间分布格局的影响以及不同生活史阶段间的种内和种间关联。结果显示: 短刺锥和茶梨在山脊和山坡分布居多, 而在沟谷较少, 西南桦则主要分布于山坡。3种优势种在完全随机模型下所有尺度上均表现为聚集分布, 且聚集强度随空间尺度的增大而减小。排除生境异质性后, 所有优势种只在小尺度上表现为聚集分布, 大尺度上为随机分布或规则分布。扩散限制对短刺锥和茶梨的分布格局影响较小, 而对西南桦的分布格局影响较为显著。在种内不同径级的空间关联上, 短刺锥和茶梨种内不同生长阶段树木之间存在相关性, 但西南桦则相关性不明显; 在种间关联上, 短刺锥和茶梨为正相关, 和西南桦为负相关, 茶梨和西南桦则正、负相关都存在。本研究表明, 物种的空间分布格局是物种本身属性和环境条件的综合反映, 其中生境过滤和扩散限制的关联效应是影响物种空间分布的主要原因。
王明慧, 陈昭铨, 李帅锋, 黄小波, 郎学东, 胡子涵, 尚瑞广, 刘万德 (2023) 云南普洱季风常绿阔叶林不同种子扩散方式的优势种空间点格局分析. 生物多样性, 31, 23147. DOI: 10.17520/biods.2023147.
Minghui Wang, Zhaoquan Chen, Shuaifeng Li, Xiaobo Huang, Xuedong Lang, Zihan Hu, Ruiguang Shang, Wande Liu (2023) Spatial pattern of dominant species with different seed dispersal modes in a monsoon evergreen broad-leaved forest in Pu’er, Yunnan Province. Biodiversity Science, 31, 23147. DOI: 10.17520/biods.2023147.
扩散方式 Dispersal modes | 优势树种 Dominant species | 多度 Abundance | 重要值 Importance value | |||
---|---|---|---|---|---|---|
小树 Sapling | 中树 Medium tree | 大树 Mature tree | 合计 Total | |||
重力扩散 Gravity dispersal | 短刺锥 Castanopsis echidnocarpa | 26,972 | 3,521 | 2,815 | 33,038 | 21.58 |
风力扩散 Wind dispersal | 西南桦 Betula alnoides | 61 | 145 | 542 | 748 | 3.18 |
动物扩散 Animal dispersal | 茶梨 Anneslea fragrans | 4,645 | 887 | 331 | 5,843 | 3.53 |
表1 云南普洱季风常绿阔叶林3种不同种子扩散方式的优势物种
Table 1 Dominant species with three different seed dispersal modes in a monsoon evergreen broad-leaved forest in Pu’er, Yunnan
扩散方式 Dispersal modes | 优势树种 Dominant species | 多度 Abundance | 重要值 Importance value | |||
---|---|---|---|---|---|---|
小树 Sapling | 中树 Medium tree | 大树 Mature tree | 合计 Total | |||
重力扩散 Gravity dispersal | 短刺锥 Castanopsis echidnocarpa | 26,972 | 3,521 | 2,815 | 33,038 | 21.58 |
风力扩散 Wind dispersal | 西南桦 Betula alnoides | 61 | 145 | 542 | 748 | 3.18 |
动物扩散 Animal dispersal | 茶梨 Anneslea fragrans | 4,645 | 887 | 331 | 5,843 | 3.53 |
图2 云南普洱季风常绿阔叶林3种不同种子扩散方式优势种径级结构分布图
Fig. 2 Size-class of diameter at breast height distributions of dominant species with three different seed dispersal modes in a monsoon evergreen broad-leaved forest in Pu’er, Yunnan
图3 云南普洱季风常绿阔叶林3种不同种子扩散方式优势种的空间分布二维点图
Fig. 3 2D point map of spatial distribution of dominant species with three different seed dispersal modes in a monsoon evergreen broad-leaved forest in Pu’er, Yunnan
图4 完全随机模型下优势种的空间分布格局。实线为观测值, 虚线为理论值, 灰色区间为95%置信区间。
Fig. 4 Spatial distribution pattern of dominant species under complete randomness model. Solid line represents the observed value, dashed line represents the theoretical value, and the gray area is the confidence interval.
图5 异质泊松模型下优势种的空间分布格局。实线为观测值, 虚线为理论值, 灰色区间为95%置信区间。
Fig. 5 Spatial distribution pattern of dominant species under heterogeneity Poisson model. Solid line represents the observed value, dashed line represents the theoretical value, and the gray area is the confidence interval.
图6 同质托马斯模型下优势种的空间分布格局。实线为观测值, 虚线为理论值, 灰色区间为95%置信区间。
Fig. 6 Spatial distribution pattern of dominant species under homogeneous Thomas model. Solid line represents the observed value, dashed line represents the theoretical value, and the gray area is the confidence interval.
图7 优势种不同径级间的种内空间关联。实线为观测值, 虚线为理论值, 灰色区间为95%置信区间。
Fig. 7 Intra-specific spatial association among different diameter classes of three dominant species. Solid line represents the observed value, dashed line represents the theoretical value, and the gray area is the confidence interval. S, Sapling; M, Medium tree; L, Mature tree.
图8 优势种种间空间关联。实线为观测值, 虚线为理论值, 灰色区间为95%置信区间。
Fig. 8 Inter-specific spatial association among dominant species. Solid line represents the observed value, dashed line represents the theoretical value, and the gray area is the confidence interval.
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