土壤的时空空间变化 反应性氧化物流通过人类的景观
Megan L Purchase1, Gary D Bending1, Ryan M Mushinski1
1School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom.
Environmental science & technology
|October 19, 2023
概括
土壤微生物显著影响活性氧化排放. 人类对土壤的影响,而不是土地使用,是这些大气污染物的主要驱动因素,影响未来的气候模型.
科学领域:
- 大气化学和物理大气化学和物理
- 土壤科学和微生物学
- 环境科学与污染问题
背景情况:
- 挥发性反应性氧化物 (NOy) 是影响空气质量和气候的关键大气污染物.
- 土壤生物排放,主要来自化和脱化,对自然的NOy有很大贡献,但由于数据缺口,它们在大气模型中表现不足.
- 了解景观规模的NOy流动需要整合土地使用,人类影响和季节性变化.
研究的目的:
- 通过各种土地使用类型和人类影响水平,在景观规模上调查NOy流动.
- 为了将土壤微生物的功能潜力和活动与NOy排放联系起来.
- 确定控制土壤NOy排放的因素,以改进大气模型.
主要方法:
- 结合16S rRNA amplicon测序和定量聚合酶连锁反应来评估土壤微生物群落.
- 测量各种土地使用类型和不同人类影响场景下的NOy流动.
- 结构方程建模的应用,以确定微生物活动,土地使用和人类因素对氧化物排放的影响.
主要成果:
- 化和非化土壤微生物的功能潜力和活动的显著差异与NOy排放直接相关.
- 高沉积的土壤显示微生物活动减少,这表明污染对土壤健康的负面影响.
- 人类对土壤的影响成为土壤NOy排放的更重要的驱动因素,而不是土地使用类型.
结论:
- 土壤微生物群落在调节大气NOy排放方面发挥着至关重要的作用.
- 人类对土壤健康的影响可以改变微生物活动,从而影响NOy流.
- 纳入人类影响和土壤微生物动态对于准确的大气NOy建模至关重要.
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