林业科学2025，Vol.61Issue(10)：74-86,13.DOI:10.11707/j.1001-7488.LYKX20240520
北京喇叭沟门天然落叶阔叶林生态系统净碳交换及其对主要环境因子的响应
Net Ecosystem Carbon Exchange and Its Response to Main Environmental Factors in a Natural Deciduous Broad-Leaved Forest Ecosystem in Labagoumen,Beijing
摘要
Abstract
[Objective]This study aims to quantify the net carbon exchange of a temperate natural deciduous broad-leaved forest ecosystem,and investigate its responses to environmental factors at daily and seasonal scales,so as to provide a scientific basis for constructing carbon cycle prediction models and accurately estimating net ecosystem carbon exchange.[Method]The typical natural deciduous broad-leaved forest ecosystem of Betula platyphylla-Populus davidiana in Labagoumen,Huairou District,Beijing was taken as the research object.The eddy-covariance technique was used to determine net ecosystem carbon exchange and relevant environmental factors in 2022.Wavelet analysis and other methods were adopted to explore the time lag and the main driving factors between net ecosystem carbon exchange and environmental factors at daily and seasonal scales.[Result]1)The cumulative annual gross ecosystem productivity,ecosystem respiration,and net ecosystem carbon exchange of B.platyphylla-P.davidiana natural forest ecosystem in Labagoumen,Beijing in 2022 were 1 330,930,and-400 g·m-2a-1,respectively.2)At the daily scale,the main influencing factor of ecosystem respiration was air temperature,with a delay time of 2.82 hours.The gross productivity and net carbon exchange of the ecosystem were mainly affected by photosynthetically active radiation and varied synchronously with photosynthetically active radiation.The results indicated that photosynthetically active radiation affected net ecosystem carbon exchange by primarily influencing gross ecosystem productivity.3)At the seasonal scale,photosynthetically active radiation was the main influencing factor of net ecosystem carbon exchange with a time lag of 14.2 days.Although precipitation was the main factor affecting the change of ecosystem respiration and gross ecosystem productivity,the similar responses of ecosystem respiration and gross ecosystem productivity to precipitation resulted in a negligible correlation between net ecosystem carbon exchange and precipitation.[Conclusion]The net carbon exchange in the B.platyphylla-P.davidiana natural forest ecosystem is more sensitive to photosynthetically active radiation at both daily and seasonal scales compared to air temperature,probably due to the susceptibility of remote mountains to cloud shading.关键词
净碳交换/碳汇/环境因子/落叶阔叶林/小波分析Key words
net ecosystem carbon exchange/carbon sink/environmental factor/deciduous broad-leaved forest/wavelet analysis分类
农业科技引用本文复制引用
马茹月,王瑞福,李鑫豪,高永龙,苏同,魏晓帅,田赟,刘鹏,查天山..北京喇叭沟门天然落叶阔叶林生态系统净碳交换及其对主要环境因子的响应[J].林业科学,2025,61(10):74-86,13.基金项目
国家自然科学基金项目(31901366,32101588,32071842) （31901366,32101588,32071842）
北京园林绿化生态系统监测网络新建站数据管理项目(GJH-2024-015). （GJH-2024-015）
