神农架小叶青冈种群的空间分布格局及种内种间空间关联

doi:10.13287/j.1001-9332.202404.006

应用生态学报 ›› 2024, Vol. 35 ›› Issue (4): 1033-1043.doi: 10.13287/j.1001-9332.202404.006

神农架小叶青冈种群的空间分布格局及种内种间空间关联

刘明伟^1,2,3, 赵常明^1,2, 陈聪琳^1,2,3, 徐凯^1,2, 徐文婷^1,2, 熊高明^1,2, 谢宗强^1,2,3*

¹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;
²国家植物园, 北京 100093;
³中国科学院大学, 北京 100049

收稿日期:2024-01-08 接受日期:2024-02-27 出版日期:2024-04-18 发布日期:2024-10-18
通讯作者: * E-mail: xie@ibcas.ac.cn
作者简介:刘明伟, 男, 2000年生, 硕士研究生。主要从事森林生态学研究。E-mail: liumingwei@ibcas.ac.cn
基金资助:
国家自然科学基金项目(U23A2021,32201323)

Spatial distribution patterns and intraspecific and interspecific spatial associations of Quercus myrsinifolia population in Shennongjia, China

LIU Mingwei^1,2,3, ZHAO Changming^1,2, CHEN Conglin^1,2,3, XU Kai^1,2, XU Wenting^1,2, XIONG Gaoming^1,2, XIE Zongqiang^1,2,3*

¹State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
²China National Botanical Garden, Beijing 100093, China;
³University of Chinese Academy of Sciences, Beijing 100049, China

Received:2024-01-08 Accepted:2024-02-27 Online:2024-04-18 Published:2024-10-18

摘要/Abstract

摘要： 小叶青冈是神农架南坡常绿阔叶林的优势种之一,对其种群空间分布格局及空间关联的研究,有助于深入理解小叶青冈种群的发展规律及潜在生态学过程,加深对亚热带北缘常绿阔叶林的结构和生物多样性维持机制的认识。本研究基于神农架南坡1 hm²的森林动态监测样地,采用成对相关函数g(r)、标记相关函数分析小叶青冈种群不同径级阶段的空间分布格局及其种内种间空间关联性。结果表明: 小叶青冈种群的径级结构呈现倒“J”型分布,种群的更新状态良好,属于增长型种群;不同径级的空间分布表现出随径级的增大聚集程度降低的趋势;小叶青冈个体之间的正关联性与它们的径级相近程度呈正相关,径级相差越大,正关联性越弱;种间空间关联在小叶青冈与群落中下层的优势种间随着尺度的增大关联性逐渐增高,与群落上层的优势种则没有显著的关联性。研究表明,神农架南坡小叶青冈种群的空间格局主要受生境过滤、种子扩散限制和种内种间竞争的影响,并且在面对不同物种时适应性策略有差异。

关键词: 常绿阔叶林, 点格局, 标记相关函数, 竞争, 生态策略

Abstract: Quercus myrsinifolia is one of the dominant species in the evergreen broad-leaf forest on the southern slope of Shennongjia. The study of spatial distribution pattern and spatial correlation of Q. myrsinifolia population will help to understand population development and potential ecological processes, as well as the structure and biodiversity maintenance mechanism of evergreen broad-leaf forests at the northern edge of the subtropics. Based on forest dynamic monitoring data from one 1 hm² permanent plot on the southern slope of Shennongjia, we employed pair correlation functions g(r) and marked correlation functions to analyze the diameter structure of the Q. myrsinifolia population, spatial distribution patterns at different diameter classes, and intraspecific and interspecific spatial associations. The results showed that diameter structure of Q. myrsinifolia population exhibited an inverted ‘J'-shaped distribution, suggesting a healthy regeneration status and belonging to a growing population type. The spatial distribution showed a decreasing trend in aggregation with increasing diameter. Positive correlations among individuals strengthened with closer diameter classes, while weakening with larger diameter differences. Interspecific spatial associations showed an increasing correlation of Q. myrsinifolia with understory dominant species with increasing spatial scales, but no correlation was observed with canopy-dominant species. Our results suggested that the spatial pattern of Q. myrsinifolia populations on the southern slope of Shennongjia was mainly influenced by habitat filtering, seed dispersal limitation, and intraspecific and interspecific competition. Furthermore, the adaptive strategies of Q. myrsinifolia varied when they coexisted with different species.

Key words: evergreen broad-leaved forest, point pattern, marked correlation function, competition, ecological strategy

刘明伟, 赵常明, 陈聪琳, 徐凯, 徐文婷, 熊高明, 谢宗强. 神农架小叶青冈种群的空间分布格局及种内种间空间关联[J]. 应用生态学报, 2024, 35(4): 1033-1043.

LIU Mingwei, ZHAO Changming, CHEN Conglin, XU Kai, XU Wenting, XIONG Gaoming, XIE Zongqiang. Spatial distribution patterns and intraspecific and interspecific spatial associations of Quercus myrsinifolia population in Shennongjia, China[J]. Chinese Journal of Applied Ecology, 2024, 35(4): 1033-1043.

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神农架小叶青冈种群的空间分布格局及种内种间空间关联

Spatial distribution patterns and intraspecific and interspecific spatial associations of Quercus myrsinifolia population in Shennongjia, China

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