红树林通过产生有机物质和改变微生物甲基剂社区来增加沉积物中的甲基化潜力
Xiaoxin Chen1, Yanwu Zhou2, Zhimao Mai2
1College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China.
The Science of the total environment
|January 12, 2025
概括
红树林植被增加了沉积物中的甲基 (MeHg) 产量,通过促进有机物质和有利于特定的微生物,如Desulfococcus. 这项研究确定了推动这些重要生态系统中甲基化的关键因素.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生态毒理学 生态毒理学
背景情况:
- 红树林生态系统被认为是 (Hg) 甲基化的重要地点.
- 虽然影响甲基 (MeHg) 生产的因素已知,但红树林湿地的主要驱动因素仍然不清楚.
研究的目的:
- 为了研究的水平,沉积物在不同的息地,在谷红树林湿地内.
- 确定影响MeHg生产的关键因素和负责Hg甲基化的微生物种群.
主要方法:
- 从泥,红树林边缘和红树林内部取沉积物样本.
- 对 (Hg) 和甲基 (MeHg) 度的分析.
- 16S rRNA基因测序和随机森林分析以确定微生物群落.
主要成果:
- 在红树林内部沉积物中,MeHg度显著更高 (1.03 ± 0.34 ng g−1 dw),而不是泥 (0.26 ± 0.08 ng g−1 dw) 和红树林边缘 (0.45 ± 0.10 ng g−1 dw).
- 红树林植被与沉积物有机物增加相关,刺激甲基化剂生长和MeHg生产.
- 增加了Desulfococcus和Desulfosarcina的丰富性,以及像Syntrophus这样的合成合作伙伴,被确定为MeHg生产的关键贡献者.
结论:
- 红树林植被通过改变沉积物特性和微生物社区组成,在增强甲基化方面发挥着至关重要的作用.
- 特定的微生物群体,特别是Desulfococcus和Desulfosarcina,是这些环境中MeHg生产的主要驱动因素.
- 了解这些植物-微生物-相互作用对于管理红树林生态系统中的Hg污染至关重要.
更多相关视频
06:52Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron OxyHydroxides, Trace Elements, and Bacteria
Published on: December 19, 2017
7.8K
09:49Prospecting Microbial Strains for Bioremediation and Probiotics Development for Metaorganism Research and Preservation
Published on: October 31, 2019
22.2K
相关概念视频
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
Environmental Applications of Microorganisms
1
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
1
Phase II Reactions: Methylation Reactions
128
Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...
The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...
128
The Periodic Table and Organismal Elements
175.4K
Overview
175.4K
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
The Sulfur Cycle
43.7K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
43.7K
