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林业科学 ›› 2025, Vol. 61 ›› Issue (10): 74-86.doi: 10.11707/j.1001-7488.LYKX20240520

• 研究论文 • 上一篇    

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

马茹月1,2,王瑞福3,李鑫豪1,2,高永龙4,苏同3,魏晓帅1,2,田赟1,2,*(),刘鹏1,2,查天山1,2   

  1. 1. 北京林业大学水土保持学院 北京 100083
    2. 北京林业大学水土保持国家林业和草原局重点实验室 北京 100083
    3. 怀柔区营林造林管护中心 北京 101499
    4. 北京市园林绿化规划和资源监测中心(北京市林业碳汇与国际合作事务中心) 北京 101118
  • 收稿日期:2024-09-05 出版日期:2025-10-25 发布日期:2025-11-05
  • 通讯作者: 田赟 E-mail:tianyun@bjfu.edu.cn
  • 基金资助:
    国家自然科学基金项目(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)

Net Ecosystem Carbon Exchange and Its Response to Main Environmental Factors in a Natural Deciduous Broad-Leaved Forest Ecosystem in Labagoumen, Beijing

Ruyue Ma1,2,Ruifu Wang3,Xinhao Li1,2,Yonglong Gao4,Tong Su3,Xiaoshuai Wei1,2,Yun Tian1,2,*(),Peng Liu1,2,Tianshan Zha1,2   

  1. 1. School of Soil and Water Conservation, Beijing Forestry University Beijing 100083
    2. Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing Forestry University Beijing 100083
    3. Forestation Management Center of Huairou District Beijing 101499
    4. Beijing Forestry and Parks Planning and Resource Monitoring Center (Beijing Forestry Carbon and International Cooperation Affairs Center) Beijing 101118
  • Received:2024-09-05 Online:2025-10-25 Published:2025-11-05
  • Contact: Yun Tian E-mail:tianyun@bjfu.edu.cn

摘要:

目的: 量化温带天然落叶阔叶林生态系统净碳交换量,探究净碳交换在日和季节尺度上对环境的响应,为温带天然落叶阔叶林生态系统碳循环模型构建和精准估算提供科学依据。方法: 以北京怀柔区喇叭沟门典型白桦?山杨天然落叶阔叶林生态系统为研究对象,采用涡度相关法测定该生态系统净碳交换量和相关环境因子,基于小波分析等方法定量分析日和季节尺度生态系统净碳交换量与环境因子的时滞关系及其主要影响因子。结果: 1) 北京喇叭沟门白桦?山杨天然落叶阔叶林生态系统2022年生态系统总生产力、生态系统呼吸量和生态系统净碳交换量分别为1 330、930和?400 g·m?2a?1。2) 在日尺度上,生态系统呼吸量的主要影响因子为空气温度,时滞时间为2.82 h,生态系统总生产力和生态系统净碳交换量主要受光合有效辐射影响,且与光合有效辐射同步变化,光合有效辐射主要通过生态系统总生产力影响生态系统净碳交换量。3) 在季节尺度上,光合有效辐射是生态系统净碳交换量的主要影响因子,时滞时间为14.2天,虽然降雨量是影响生态系统呼吸量和生态系统总生产力变化的主要因子,但由于生态系统呼吸量和生态系统总生产力对降雨量响应的一致性,相互抵消后使得降雨量对生态系统净碳交换量的影响较小。结论: 因深山易受云雾遮挡,相较空气温度,白桦?山杨天然落叶阔叶林生态系统净碳交换量在日和季节尺度上对光合有效辐射的响应更敏感,但其响应机制存在差异。

关键词: 净碳交换, 碳汇, 环境因子, 落叶阔叶林, 小波分析

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 1330, 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.

Key words: net ecosystem carbon exchange, carbon sink, environmental factor, deciduous broad-leaved forest, wavelet analysis

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