北京林业大学学报2025，Vol.47Issue(12)：76-86,11.DOI:10.12171/j.1000-1522.20250117
采伐干扰对吉林蛟河针阔混交林林下层木本植物生物量影响
Effects of logging disturbance on biomass of understory woody plants in conifer-broadleaved mixed forests in Jiaohe,Jilin Province of northeastern China
摘要
Abstract
[Objective]Understory vegetation,as a key participant in the material cycling and energy flow of forest ecosystems,plays a significant role in understanding forest ecosystem recovery processes,biodiversity maintenance and sustainable management.Studying the impact mechanisms of logging disturbances on biomass of understory woody plants is of great importance.[Method]This study focused on conifer-broadleaved mixed forests in northeastern China,employing mixed-effect models and structural equation modeling(SEM)to analyze the factors influencing biomass of understory woody plants.[Result](1)Thinning released growing space for understory woody plants,leading to a significant increase in understory biomass with higher thinning intensity(p<0.05).(2)Understory species diversity and structural diversity were primary factors influencing understory biomass,accounting for 51.00%of the variance explained.Logging disturbance ranked second(29.48%),while the combined effects of overstory species diversity and stand structure explained 16.92%.The direct impact of light environment on understory biomass variation was minimal,explaining only 2.53%.(3)Logging disturbance significantly affected(p<0.05)changes in tree-like shrub biomass of understory woody plants,whereas it did not significantly affect(p>0.05)the biomass of treelets and typical shrubs.(4)SEM further revealed that logging disturbance not only directly promoted understory biomass accumulation,but also indirectly influenced it by regulating overstory stand structure and species diversity.[Conclusion]This study elucidates the direct and indirect mechanisms of logging disturbance on understory biomass,highlighting central roles of understory diversity and logging intensity in enhancing biomass accumulation.These findings provide a theoretical foundation for scientifically evaluating long-term ecological effects of logging disturbance and optimizing forest management strategies,and provide a practical guidance for achieving sustainable management goals.关键词
采伐干扰/物种多样性/结构多样性/林内光环境/冠层结构复杂度Key words
logging disturbance/species diversity/structural diversity/light environment in forest/canopy structural complexity分类
农业科技引用本文复制引用
程福山,罗也,孙越,张忠辉,何怀江,张跃革,李庚奇,刘国良..采伐干扰对吉林蛟河针阔混交林林下层木本植物生物量影响[J].北京林业大学学报,2025,47(12):76-86,11.基金项目
吉林省科技厅项目(20240402031GH),国家重点研发计划(2023YFF1304004). （20240402031GH）
