的可用性和降水的变化改变微生物介导的NO和N2O排放量从Pinyon-Juniper干地
Sharon Zhao1, Alexander H Krichels1,2, Elizah Z Stephens1
1Department of Environmental Sciences, University of California, Riverside, California, USA.
Global change biology
|March 27, 2025
概括
改变降水模式会影响 (N) 循环和微量气体排放. 干旱增加了土壤N,导致降雨恢复时释放更多的氧化 (NO) 和氧化 (N2O),影响气候变化.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生态生态学 生态生态学
背景情况:
- 气候变化改变了降水,影响了陆地生态系统中 (N) 循环.
- 干旱导致土壤中的积,增加了氧化 (NO) 和氧化 (N2O) 的排放.
- 化微生物,包括氨氧化细菌 (AOB) 和古生物 (AOA),是加工和气体排放的关键参与者.
研究的目的:
- 调查夏季和冬季降雨模式的变化如何影响干地生态系统中化剂衍生的N微量气体排放.
- 了解AOA和AOB对降水变化的反应及其对N气流的影响.
- 预测降水模式变化对土壤N可用性和微量气体排放的影响.
主要方法:
- 对夏季和冬季降水模式的实验操纵.
- 测量AOA和AOB衍生的N微量气体排放量 (NO和N2O).
- 量化AOA和AOB的丰度和土壤N度.
主要成果:
- 除夏季降水外,由于土壤N的可用性增加,AOB衍生的NO排放量增加.
- 夏季降水量增加促进了AOB活动.
- 排除冬季降水导致了积,但没有改变排放;累积的酸盐与重湿时的高N2O排放有关.
结论:
- 降水时间和强度显著影响N微量气体排放,季节性变化起着至关重要的作用.
- 气候变化导致的降雨模式的变化可能会改变干地生态系统中NO和N2O排放的平衡.
- 了解微生物对改变水文学的反应对于预测未来的气流及其气候影响至关重要.
相关概念视频
Overview of Nitrogen Metabolism
7.8K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.8K
The Nitrogen Cycle
51.4K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
51.4K
The Roles of Bacteria and Fungi in Plant Nutrition
34.9K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
34.9K
2° Amines to N-Nitrosamines: Reaction with NaNO2
4.0K
Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.
4.0K
Overview of Metabolism
29.3K
Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
29.3K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
3.2K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.2K


