人类活动影响的湖中溶解的有机物 (DOM) 通过碳代谢影响生态圈微生物多样性和DOM多样化
Yingyue Song1, Xinghong Cao1, Sheng-Ao Li1
1College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
Journal of environmental management
|August 2, 2024
概括
不同的溶解有机物 (DOM) 来源影响藻类-细菌相互作用,影响水生碳循环. 微生物的新陈代谢转化DOM,增加反抗形式和改变微生物群落.
科学领域:
- 水生微生物生态学 水生微生物生态学
- 生物地质化学生物地质化学
- 环境微生物学环境微生物学
背景情况:
- 藻类-细菌相互作用是水生碳循环和污染物降解的关键.
- 陆地溶解有机物 (DOM) 输入湖泊受到人类土地利用的影响.
- DOM起源对自然界微生物群落和DOM组成的影响仍然未得到充分研究.
研究的目的:
- 调查不同来源的DOM如何影响自然界微生物多样性和DOM分子组成.
- 了解碳代谢在藻类-细菌-DOM相互作用中的作用.
- 探索DOM对藻类生长和微生物群落结构的影响.
主要方法:
- 在自然细菌群体中化Microcystis aeruginosa.
- 从各种来源添加DOM (苏瓦尼河酸,苏瓦尼河天然有机物质,农田湖DOM,城市湖DOM).
- 高分辨率质谱,分子热力学分析和代谢组分析.
主要成果:
- DOM 源对藻类生长有不同的影响;有些促进了藻类生长,而城市湖 DOM 则抑制了藻类生长.
- 藻类代谢物和DOM一起影响了自然界微生物化学反应.
- 在与藻类-细菌系统相互作用后,DOM化学多样性变得均.
- 微生物相互作用导致了较少的生物可用性和更强硬的DOM形成.
- 补充DOM增强了代谢途径,用于不稳定和反抗性DOM利用,具有强大的辅助因子和维生素代谢.
结论:
- 藻类-细菌-DOM相互作用在分子层面上显著塑造水生碳循环.
- 微生物代谢在DOM转化中起着至关重要的作用,增加了反抗性的DOM.
- 了解这些相互作用对于预测DOM的命运及其对水生生态系统的影响至关重要.
更多相关视频
10:43Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology
Published on: November 5, 2014
25.7K
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
8.6K
相关概念视频
What are Biogeochemical Cycles?
31.3K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
31.3K
Bioremediation
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
Ecological Disturbance
17.0K
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
17.0K
Threats to Biodiversity
22.2K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.2K
What is an Ecosystem?
39.5K
Overview
39.5K
The Carbon Cycle
37.2K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
37.2K
