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探索来自不同种类红树林的树干中介温室气体排放的空间和时间变化

Zhao-Jun Yong¹, Wei-Jen Lin², Tzu-Chieh Chiu³

¹Department of Life Sciences and Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 402202, Taiwan.

Environmental science & technology

|December 3, 2025

概括

红树林树干会排放温室气体 (GHG),包括甲和氧化,影响它们的碳储存. 这些干排放,特别是来自Avicennia marina,可以抵消土壤碳埋葬,因此需要将它们纳入气候变化缓解评估中.

科学领域:

环境科学环境科学
气候变化研究气候变化研究
生态系统的碳循环循环.

背景情况:

红树林生态系统对于碳捕获至关重要.
红树林的温室气体 (GHG) 排放,特别是甲 (CH4) 和氧化 (N2),可能会挑战它们的碳捕获能力.
以前的研究主要集中在基于土壤的温室气体排放上,对干排放的理解有限.

研究的目的:

量化来自台湾四种主要红树林物种树干的温室气体 (CO2,CH4和NO) 排放量.
评估干排放对红树林生态系统总体碳预算的贡献.
调查干N₂O流动的季节性变化和关键驱动因素.

主要方法:

在台湾西海岸,对四种红树林物种 (Avicennia marina,Kandelia obovata,Lumnitzera racemosa和Rhizophora stylosa) 进行了干CO₂,CH₄和N₂O流量的现场测量.
排放量被测量在树干-大气界面.
结构方程建模用于识别影响干N₂O流量的季节性变化的因素.

主要成果:

所有研究的红树林物种都表现出CO2,CH4和NO2的干排放.
阿维塞尼亚海港显示了最高的温室气体流量,N2O排放量对整个生态系统流量作出了重大贡献.
发现干CH4和N2O排放抵消了土壤碳埋葬率,特别是在A. 海洋和季节性N₂O流主要是由温度驱动的.

结论:

红树林干的排放,特别是N2O,可以显著影响这些生态系统的净碳平衡.
这些发现突显了将茎介导的温室气体排放纳入红树林碳预算评估的必要性.
对红树林的精确碳核算需要全面了解所有排放来源,包括树干,以充分评估它们在减缓气候变化中的作用.

关键词:

碳水槽的碳水槽.红树林森林红树林森林甲是一种甲.氧化是什么?氧化是什么?通过干介导的温室气体流量.

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