雷州半岛风水林灌木层优势种群空间分布格局与关联性  

Spatial distribution pattern and correlation of dominant populations in the shrub layer of Fengshui forest in Leizhou Peninsula,China

作　　者：陈材 唐光大 董晓全 徐颂军[1] CHEN Cai;TANG Guangda;DONG Xiaoquan;XU Songjun(School of Geography,South China Normal University,Guangzhou 510631,China;College of Forestry and Landscape Archi-tecture,South China Agricultural University,Guangzhou 510642,China)

机构地区：[1]华南师范大学地理科学学院,广州510631 [2]华南农业大学林学与风景园林学院,广州510642

出　　处：《应用生态学报》2024年第2期371-380,共10页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(42376226)资助。

摘　　要：为探讨人居环境周边存留碎片化森林林下物种空间格局,本研究以广东雷州半岛风水林灌木层中重要值位列前三的粗糠柴、皂帽花、九节为对象,运用点格局分析方法分析这3个优势植物种群的空间分布格局和种内关联性。结果表明:粗糠柴、九节、皂帽花种群在0~25 m的空间尺度内主要表现为聚集分布,以幼树最为显著,随着龄级的增长,聚集程度逐渐减弱。影响3种植物分布格局的主要因素有生境异质性、负密度制约和扩散限制。各龄级间多呈现为正关联关系,尤在幼树与中龄树、幼树与成年树之间作用更为明显。因此,在雷州半岛的生态修复过程中,0~25 m的空间尺度内粗糠柴、九节、皂帽花在小范围内应聚集栽培,聚集程度视植物形态而定,大范围内则应分散栽培。To elucidate the spatial patterns of understory species in fragmented forests adjacent to human settle⁃ments,we examined the spatial distribution and intraspecific correlations of three dominant species Mallotus philip⁃pensis,Dasymashalon trichophorum,and Psychotria rubra by employing point pattern analysis,which were the top three in terms of importance value in the shrub layer of Fengshui forest in Leizhou Peninsula,Guangdong.The results showed that all the three species were mainly aggregated at the scale of 0-25 m,especially for young trees.The degree of aggregation gradually diminished with increasing age class.The spatial distribution patterns of three species were predominantly influenced by habitat heterogeneity,negative density dependence,and dispersal limita⁃tion.They showed positive association among different age classes,especially between young trees and middle age trees and between young trees and adult trees.Therefore,in the ecological restoration process of Leizhou Peninsula,M.philippensis,D.trichophorum,and P.rubra should be planted in clusters at a small scale within the range of 0-25 m,with the degree of clusters depending on plant morphology.For larger scales,a dispersed cultivation approach was advocated.

关 键 词：风水林 雷州半岛 灌木层 空间分布 种内联结 

分 类 号：S718.54[农业科学—林学]