文献类型：期刊文献

中文题名：川西亚高山天然次生林主要树种的空间分布格局及其与土壤因子间的关联性分析

英文题名：Analysis of spatial distribution patterns of major tree species in natural secondary forests of subalpine western Sichuan and their association with soil factors

作者：赵京东[1] 柳鑫[2] 陈明涛[3] 王乐[1] 冯秋红[4,5] 蔡蕾[4,5] 徐峥静茹[4,5] 李旭华[4,5] 刘涛[4,5] 苟畅[6] 白建华[1] 杨晓晖[1]

第一作者：赵京东

机构：[1]中国林业科学研究院荒漠化研究所/生态保护与修复研究所,北京100091;[2]中国林业科学研究院草原研究中心/生态保护与修复研究所,北京100091;[3]中国林业科学研究院,北京100091;[4]四川省林业科学研究院,森林和湿地生态恢复与保育四川省重点实验室,成都610081;[5]四川卧龙森林生态系统国家定位观测研究站,卧龙森林生态四川省野外科学观测研究站,四川卧龙623006;[6]西南大学资源环境学院,重庆400715

年份：2025

卷号：43

期号：3

起止页码：330-339

中文期刊名：植物科学学报

外文期刊名：Plant Science Journal

收录：;北大核心:【北大核心2023】；

基金：中国林业科学研究院生态保护与修复研究所横向项目(202304063-4290)。

语种：中文

中文关键词：次生林;红桦;岷江冷杉;空间分布;空间关联性

外文关键词：Secondary forest;Betula albosinensis;Abies fargesii var.faxoniana;Spatial distribution;Spatial association

分类号：Q948.1

摘要：本文以川西亚高山区红桦(Betula albosinensis Burkill)和岷江冷杉(Abies fargesii var.faxoniana(Rehder&E.H.Wilson)T.S.Liu)为主要建群种的典型天然次生林为研究对象,采用相邻格子法对1 hm2样地内的核心区域进行每木调查,利用点格局分析法探究乔木层3个主要树种的空间分布格局及种间关联性,并分析林木个体分布与土壤持水能力间的联系。结果显示:(1)乔木层中,红桦、岷江冷杉以及云杉(Picea asperata Mast.)的相对优势度较高。其中,红桦种群为衰退型,其大径级个体占比较高且无幼苗,而岷江冷杉种群为增长型,其小径级个体和幼苗较多,云杉及其幼苗占比均较少。(2)红桦、岷江冷杉、云杉和幼苗(岷江冷杉+云杉)在小尺度内均呈聚集分布,并随尺度增大趋向随机分布。(3)在小尺度上,岷江冷杉与云杉间更倾向于相互促进,并与红桦竞争资源。幼苗分别与岷江冷杉、云杉呈负相关,与红桦呈正相关,而随着尺度的增大,幼苗与3个主要树种均呈正相关。(4)红桦与土壤持水量间存在正效应。本研究为川西地区天然次生林的管理和生态恢复提供了参考。
This study focused on typical natural secondary forests in the subalpine areas of western Sichuan,primarily composed of Betula albosinensis Burkill and Abies fargesii var.faxoniana(Rehder&E.H.Wilson)T.S.Liu as the dominant species.Using an adjacent grid method,a detailed survey of every tree within a 1-hectare core area was conducted.Point pattern analysis was employed to investigate the spatial distribu-tion patterns of the three main tree species and their interspecific associations in the canopy layer.Water con-servation indicators were also measured to further reveal the relationship between tree distribution and soil water holding capacity.Results showed that:(1)The relative dominance of B.albosinensis,A.fargesii var.faxoniana,and Picea asperata Mast.was high in the canopy layer of the secondary forest.The B.albosinen-sis population was in decline,characterized by a higher proportion of large-diameter individuals and a lack of seedlings.The A.fargesii var.faxoniana population was undergoing active regeneration,characterized by a high frequency of small-diameter individuals and seedlings,while the P.asperata population maintained low abundance across all size classes.(2)All three species and seedlings exhibited significant aggregation at fine spatial scales,transitioning towards random distribution at broader scales.(3)At small scales,A.fargesii var.faxoniana and P.asperata demonstrated facilitative interactions and jointly exerted competitive pressure on B.albosinensis.Seedlings were negatively correlated with A.fargesii var.faxoniana and P.asperata but positive-ly correlated with B.albosinensis;however,these associations shifted to positive correlations with all three species as spatial scale increased.(4)A strong positive relationship between B.albosinensis presence and soil water retention underscored its functional importance in maintaining the hydrological stability of the secondary forest soil.These findings provide valuable insights into the ecological management and restoration of natural secondary forests in the western Sichuan region.