文献类型：期刊文献

中文题名：川西米亚罗亚高山暗针叶林岷江冷杉和糙皮桦空间格局及其关联性分析

英文题名：Spatial patterns and associations of main dominant species Abies fargesii var. faxoniana and Betula utilis in Miyaluo subalpine dark coniferous forest of western Sichuan, China

作者：赵广东[1,2] 熊凯[1,2] 许格希[1,2] 马凡强[1,2] 杨洪国[3] 刘顺[1,2] 史作民[1,2,4] 陈健[1,2] 张运[1,2]

第一作者：赵广东

机构：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091;[2]四川米亚罗森林生态系统定位观测研究站,理县623100;[3]中国林业科学研究院生态保护与修复研究所,北京100091;[4]南京林业大学南方现代林业协同创新中心,南京210037

年份：2022

卷号：42

期号：8

起止页码：3377-3388

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：中央级公益性科研院所基本科研业务费专项(CAFYBB2016MA004,CAFZC2017M004);国家重点研发计划课题(2016YFC0502104)。

语种：中文

中文关键词：优势种;径级;种内种间关系;点格局分析;物种共存

外文关键词：dominant species;DBH size class;intraspecific and interspecific relationships;point pattern analysis;species coexistence

分类号：Q948.1

摘要：基于2019年9月完成的川西米亚罗亚高山暗针叶林9.6 hm^(2)动态样地的调查数据,分析了主要优势种岷江冷杉(Abies fargesii var.faxoniana)与糙皮桦(Betula utilis)的径级结构,并运用O-ring统计中的成对相关函数g(r)和g_(12)(r),研究了两个优势种的空间格局及其种内、种间的关联性。结果表明:岷江冷杉与糙皮桦径级分布连续,均呈倒“J”型。岷江冷杉与糙皮桦的不同径级个体主要呈现由聚集分布向随机分布发展的趋势。岷江冷杉的小树对幼树、中树对幼树、中树对小树以及大树对中树的种内相关性在所有空间尺度上均为显著正相关(P<0.05),而相同径级糙皮桦的种内相关性则表现为由显著正相关(P<0.05)逐渐向无显著相关(P>0.05)变化。随着空间尺度的增大,岷江冷杉的大树对幼树、大树和小树由无显著相关(P>0.05)逐渐向显著正相关(P<0.05)变化,糙皮桦的大树对幼树由显著负相关(P<0.05)逐渐向无显著相关(P>0.05)变化。岷江冷杉大树对糙皮桦所有径级个体的种间相关性主要呈现由为显著负相关(P<0.05)逐渐向无显著相关(P>0.05)变化,糙皮桦大径级个体对所有径级的岷江冷杉主要呈现出显著负相关(P<0.05)。岷江冷杉和糙皮桦的空间格局及其关联性随径级、空间尺度的不同而变化。
Based on the investigation data from a 9.6 hm^(2)Miyaluo dark coniferous forest dynamics plot in western Sichuan in September 2019, the diameter at breast height(DBH) size class structure of two dominant species Abies fargesii var. faxoniana and Betula utilis was analyzed. The spatial distribution, intraspecific and interspecific associations of the two dominant species with four different DBH size classes were also illustrated by using paired correlation functions g(r) and g_(12)(r) in the O-ring statistics of spatial point pattern analysis. The DBH size class structure of the two dominant species showed continuously and a reverse “J” type distribution. The individuals of A. fargesii var. faxoniana and B. utilis with different DBH size classes mainly showed a tendency from aggregation distribution to random distribution. The interspecific relationships of A. fargesii var. faxoniana including small trees to saplings, medium trees to saplings, medium trees to small trees, big trees to medium trees showed positively spatial associations, while that of B. utilis presented a trend from significantly positive(P<0.05) to non-obvious associations(P>0.05). With the increase of spatial scale, the relationship between big trees to sapling and between big trees to small trees of A. fargesii var. faxoniana was from non-obvious to significantly positive associations(P<0.05). However, the big trees to saplings of B. utilis showed a change from significantly negative to non-obvious associations(P<0.05). In the meanwhile, the big trees of A. fargesii var. faxoniana to all DBH size classes individuals of B. utilis mainly showed a trend from significantly negative(P<0.05) to non-obvious associations. There were mainly significant negative associations(P<0.05) between individuals with big DBH size classes of B. utilis and all DBH size classes individuals of A. fargesii var. faxoniana(P<0.05). In short, the spatial distribution pattern and associations of A. fargesii var. faxoniana and B. utilis varied with the change of DBH size classes and the spatial scale.