不依赖的CO2减少在五个温带湖泊中主导甲生成,这些湖泊在热带状态上有所不同
Dimitri Meier1,2, Sigrid van Grinsven3,4, Anja Michel1
1Department of Environmental Systems Science, Institute of Biogeochemistry and Pollutant Dynamics, Swiss Federal Institute of Technology, Zurich (ETH Zurich), Universitätstrasse 16, 8092 Zurich, Switzerland.
ISME communications
|July 11, 2024
概括
缩影响湖泊沉积物中的甲产量. 虽然平湖的甲含量较高,但甲素的丰富性在寡型沉积物中最大,电子转移为甲生产提供动力.
科学领域:
- 环境微生物学 环境微生物学
- 地质化学 地质化学
- 临界技术 临界技术
背景情况:
- 湖泊沉积物是大气中甲 (CH4),一个强大的温室气体的重要来源.
- 甲的产生和排放受到营养投入,有机碳和电子受体的可用性的影响,而安化起着关键作用.
研究的目的:
- 为了研究如何优化对产生甲的古物种的丰富性和社区结构的影响.
- 为了确定对湖泊沉积物中甲基生成途径的优化作用的影响.
- 分析已知食物历史的瑞士湖泊的时间解决的沉积物记录.
主要方法:
- 来自5个瑞士湖泊的时间解析沉积物记录的分析.
- 量化甲素丰富度和社区结构.
- 通过碳同位素分离,分类学身份和基因组数据确定甲生成途径.
- 测量反应剂和产品度用于热力学分析.
主要成果:
- 欧湖的CH4度较高,但甲素丰富度在寡湖沉积物中最高.
- 在OTU层面上,甲产生的社区组成因热带状况 (寡热带与轻热带) 而有显著的变化.
- CO2降解是主要的甲基生成途径,但H2依赖的CO2降解在热力学上是不利的.
- 从合成细菌到甲基生物的直接电子转移可能会使CO2减少,绕过H2.
结论:
- 缩改变了湖泊沉积物中的甲素丰富度和社区结构.
- 湖泊沉积物中的甲基生成主要是由CO2减少驱动的,可能是通过直接的物种间电子转移.
- 了解这些微生物过程对于预测淡水生态系统的甲排放至关重要.
更多相关视频
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
8.6K
14:38Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
Published on: April 20, 2012
11.4K
相关概念视频
00:46Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
02:13Reduction of Alkenes: Catalytic Hydrogenation
12.0K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.0K