从成熟的黑树中产生的干甲排放的短暂峰值 (
Daniel Köhn1, Anke Günther1, Ines Schwabe1
1Landscape Ecology University of Rostock Rostock Germany.
Plant-environment interactions (Hoboken, N.J.)
|June 7, 2023
概括
树干可以排放甲 (CH4),但研究是有限的. 温带泥炭地中的黑树干被发现是间歇性的CH4来源,对总体预算的贡献很小,特别是在干旱地区.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
背景情况:
- 树干被认为是温室气体甲 (CH4) 的潜在来源.
- 全球对干CH4排放的评估受到有限的研究和高生态系统变异性的阻碍.
- 黑 (Alnus glutinosa) 是温带泥炭地的常见树,但其在CH4循环中的作用尚未完全理解.
研究的目的:
- 量化成熟的黑树干对温带泥炭地整体CH4交换的贡献.
- 调查水文系统 (排水与未排水) 对干CH4排放的影响.
- 评估树叶作为甲基生成基质的作用.
主要方法:
- 在两年内使用封闭的室内测量树干和土壤的CH4排放量.
- 在排水和未排水的黑树林中,CH4交换的比较.
- 实验室化实验评估树叶作为甲基生成的基质.
主要成果:
- 黑的干CH4排放是间歇性的,主要发生在未排水地点的洪水期间.
- 在被排水的地方没有检测到干CH4排放;土壤充当了CH4沉降器.
- 干排放量不到两个地点的CH4总预算的0.3%.
结论:
- 成熟的黑树茎可以成为大气中CH4的间歇性来源.
- 干CH4排放似乎在温带泥炭地具有较小的相对重要性.
- 水文条件显著影响黑树茎在CH4循环中的作用.
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