盐度导致从小内陆水域的甲排放受到广泛限制
Cynthia Soued1, Matthew J Bogard2, Kerri Finlay3,4
1Department of Biological Sciences, University of Lethbridge, Lethbridge, AB, Canada.
Nature communications
|January 24, 2024
概括
盐度显著影响内陆水域的甲 (CH4) 排放,特别是小池和湿地. 目前的模型高估了这些温室气体排放,特别是在加拿大大草原等盐地区.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 微生物学 微生物学
背景情况:
- 内陆水域是甲 (CH4) 的主要来源,甲是一种强大的温室气体.
- 现有的CH4排放模型通常基于低盐度环境,可能无法准确地代表富含盐水.
研究的目的:
- 调查盐度对微生物甲循环和内陆水域水生排放的影响.
- 评估当前在盐水环境中的CH4排放模型的准确性,特别是在加拿大大草原.
主要方法:
- 现场调查和的共变量测量被用来收集数据.
- 分析的重点是盐度,有机物和CH4循环在各种内陆水体之间的相互作用.
主要成果:
- 盐度显著限制了微生物的CH4循环,减少了富含盐水中的水生排放.
- 由于未解决的盐度,现有的模型高估了池和湿地的CH4排放量数量级.
- 盐度对CH4模式的影响在小虫息地最为明显,与有机物质的可用性相互作用.
结论:
- 当前对加拿大大草原小水体的CH4排放估计,当不考虑度时,可能会被高估至少81%.
- 这些发现表明,全球晶状体CH4排放量可能被高估,并强调需要在未来的预测中纳入盐化效应.
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