西北林学院学报2025，Vol.40Issue(4)：47-55,9.DOI:10.3969/j.issn.1001-7461.2025.04.06
长白山天然次生林不同空间尺度下多样性与生产力关系
Relationship Between Diversity and Productivity of Natural Secondary Forest in Changbai Mountain at Different Spatial Scales
摘要
Abstract
This study explores the correlation between biodiversity,abiotic factors,and productivity at dif-ferent spatial scales.Using the natural secondary forest in the Changbai Mountain as the study area,quad-rats with different spatial scales(50 m×50 m,20 m×20 m,10 m×10 m)were established.The optimal indicators representing species diversity and structural diversity were determined by constructing a multi-ple regression model,and then the relative effects of biodiversity and abiotic factors on productivity were analyzed and compared through structural equation model.The results show that the effects of biodiversity and abiotic factors on community productivity were significantly spatial scale dependent.At each spatial scale,there was a positive correlation between species diversity and productivity,and with the increase of spatial scale,the positive correlation between species diversity and productivity gradually became smaller,from significant positive correlation to insignificant positive correlation.At each spatial scale,there was a negative correlation between structural diversity and productivity,and with the increase of spatial scale,the intensity of negative effect between them gradually increased,from insignificant negative correlation to sig-nificant negative correlation.Abiotic factors had certain effects on aboveground biomass at different spatial scales,thus further affecting changes in productivity.Stand productivity was related to the joint action of biological diversity and abiotic factors,and was restricted by spatial scale.This conclusion could provide scientific theoretical support for biodiversity conservation,ecosystem function improvement and forest for-ward succession management in Changbai Mountain area.关键词
天然次生林/空间尺度/物种多样性/结构多样性/生产力Key words
natural secondary forest/spatial scale/species diversity/structural diversity/productivity分类
农业科技引用本文复制引用
罗也,张忠辉,刘婷,杨帆,夏秀雪,苑景淇,于忠亮,何怀江..长白山天然次生林不同空间尺度下多样性与生产力关系[J].西北林学院学报,2025,40(4):47-55,9.基金项目
国家"十四五"重点研发计划项目(2022YFD2201003-04) （2022YFD2201003-04）
吉林省科技厅项目(YDZJ202301ZYTS343). （YDZJ202301ZYTS343）
