南亚热带常绿阔叶林优势种组的空间分布格局及组间关联  

Spatial Distribution Pattern and Spatial Association of Dominant Species Groups in a Subtropical Evergreen Broad-Leaved Forest

作　　者：李林[1,2] 魏识广[2] 叶万辉 练琚愉[3,4] 温智峰[1] 周景钢 Li Lin;Wei Shiguang;Ye Wanhui;Lian Juyu;Wen Zhifeng;Zhou Jinggang(College of Life and Environmental Science,Guilin University of Electronic Technology,Guilin 541004;Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University),Ministry of Education,Guilin 541006;Key Laboratory of Vegetation Restoration and Management of South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650;Center of Plant Ecology,Core Botanical Gardens,Chinese Academy of Sciences,Guangzhou 510650)

机构地区：[1]桂林电子科技大学生命与环境科学学院,桂林541004 [2]广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室,桂林541006 [3]中国科学院华南植物园退化生态系统植被恢复与管理重点实验室,广州510650 [4]中国科学院核心植物园植物生态中心,广州510650

出　　处：《林业科学》2022年第9期16-24,共9页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(32060305);广西自然科学基金面上项目(2020GXNSFAA159108);广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室研究基金项目(ERESEP2021Z06)。

摘　　要：【目的】从种组和物种2个水平,细分研究不同特征优势种组的空间分布格局和组间关联及其随尺度变化的规律,探讨鼎湖山南亚热带常绿阔叶林群落优势种空间分布格局和空间关联的成因,揭示群落中优势种的共存和分布规律,为针对性开展该区域生物多样性保护提供理论依据。【方法】基于鼎湖山20 hm2南亚热带常绿阔叶林群落(DHS大样地)中重要值前10的优势种的调查数据和信息,采用相对邻体密度指数Ωr分析优势种组和组内物种的空间分布点格局,采用多元点格局g12方程进行组间和种间关联的统计。【结果】1)聚集分布不仅在物种水平占主导地位,也是种组水平上空间分布格局的主要类型,各优势种组内检测到的显著聚集程度随检测尺度增大均呈下降趋势。2)各特征优势种组在群落中保持优势的策略不同,组间关联存在差异。径级优势种组与数量优势种组分别以大径级和高数量2种生存策略竞争生存资源,最终二者在空间分布上产生差异,以各自的特征共同保持优势,在所有检测尺度均呈显著负相关;径级优势种组与径级和数量均优势种组在所有检测尺度上都独立不相关;数量优势种组与径级和数量均优势种组在群落垂直空间处于互补分布状态,在水平空间则集中分布在相同或相近空间中,在所有检测尺度上都显著正相关。3)各特征优势种组的组内种间关联随尺度变化存在差异:径级优势种组内种间关联以正相关为主;数量优势种组的组内种间关联结果各异;径级和数量均优势种锥栗和肖蒲桃显著负相关。【结论】种组水平的空间分布格局延续了在物种水平上的检测结果,聚集分布仍然是群落空间分布格局的主要类型。各特征优势种组在群落中保持优势的策略不同,组间关联存在差异。径级优势种组与数量优势种组在水平空间互补分布,二者在所有检测尺度�【Objective】From two levels of species group and species to research the spatial distribution pattern of different characteristics of dominant species group, also to research the spatial associations between groups and within groups and their laws of change with scales. To explore spatial distribution pattern of dominant species and the causes of intercorrelation of subtropical evergreen broad-leaved forest community in Dinghushan Mountain, further to reveal the coexistence and distribution of dominant species in communities, and to provide a theoretical basis for biodiversity conservation in this region.【Method】Based on the survey data of the top 10 dominant species in the 20 hm2subtropical evergreen broad-leaved forest community in Dinghushan Mountain, the spatial distribution point patterns of species groups and within groups were analyzed using the relative neighborhood density index Ωr, and the spatial correlation between species groups and within groups was analyzed using the multivariate point pattern g12equation.【Result】 1) Aggregation distribution was not only dominant at the species level, but also the main type of spatial distribution pattern at the species group level. The degree of significant aggregation detected in each dominant species group showed a downward trend with the increase of detection scale. 2) The strategies of maintaining dominance of each characteristic dominant species group in the community were different, which reflected the difference of association among species groups. Diameter class dominant species group and quantitative dominant species group competed for survival resources with two different survival strategies respectively from large diameter class and high quantity. In the end, the two species had different spatial distribution and maintained their advantages together with their own characteristics, showing a significant negative correlation at all detection scales. The diameter class dominant species group and the diameter class and quantitative dominant spec

关 键 词：南亚热带常绿阔叶林 优势种组 空间分布格局 组间关联 大型固定样地 

分 类 号：S718.5[农业科学—林学]