海洋无氧阻碍了海藻释放的溶解有机碳转化为耐火的溶解有机碳
Lingyun Zhao1, Hongyan Xing2, Rongyu Xin2
1College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China.
Marine pollution bulletin
|December 9, 2024
概括
海洋无氧阻碍了微生物碳 (MCP) 通过不稳定溶解有机碳 (LDOC) 转化为耐火溶解有机碳 (RDOC). 无毒条件可能会增强深海碳运输,增加封存潜力.
科学领域:
- 海洋微生物生态学
- 生物地质化学循环是什么
- 碳封存是一种碳封存方式.
背景情况:
- 大藻衍生溶解有机碳 (DOC) 转化是通过微生物碳 (MCP) 进行碳封存的关键.
- 沿海的DOC命运受到海洋无氧的影响,这是这些环境中常见的情况.
研究的目的:
- 为了研究对鱼衍生DOC成分和细菌群体结构的诺莫西克与无氧条件的影响.
- 了解无氧如何影响微生物碳 (MCP) 和变态DOC (LDOC) 转化为耐火DOC (RDOC).
主要方法:
- 三维光平行因子分析 (PARAFAC) 用于DOC表征.
- 里叶变换离子旋转子共振质谱法 (FT-ICR-MS) 用于详细的分子分析.
- 16S rRNA高通量测序用于细菌群落概况.
主要成果:
- 在无氧条件下,与正常条件相比,可变溶解有机碳 (LDOC) 的比例增加了4.61%.
- 在无氧条件下,耐火溶解有机碳 (RDOC) 的比例在240天后在无氧条件下比在正常条件下低8.06%.
- 发现无氧阻碍了LDOC转化为RDOC.
结论:
- 无氧抑制了微生物碳 (MCP) 介导的鱼衍生的DOC转化为RDOC.
- 虽然normoxia有利于RDOC生产,但anoxia可能会促进DOC运输到深海,从而增强碳捕获.
- 在无毒区培养大藻类可能会增加它们的碳捕集能力.
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
8.5K
08:57VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders
Published on: August 3, 2016
10.9K
相关概念视频
Metabolism of Chemolithotrophs
2
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
2
Primary Production
23.5K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.5K
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
Carbon-dioxide Fixation
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
