确定居民微生物社区成员及其与地球化学的相关性,在蛇形的春天
Leah R Trutschel1, Brittany R Kruger2, Joshua D Sackett1
1Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, United States.
Frontiers in microbiology
|July 3, 2023
概括
在尼斯普林斯进行了一年的研究中,在高性环境中发现了一个稳定的核心微生物社区. 这些特有微生物显著影响春季的地球化学,特别是氨和硫循环,为蛇形生态系统提供了洞察力.
科学领域:
- 天体生物学和地质微生物学
- 地球上的蛇形化系统.
- 超的微生物生态学
背景情况:
- 陆地蛇形化系统是性微生物群落的主机,受到地质和环境因素的影响.
- 区分短暂和特有微生物对于理解生态系统稳定性和在这些可变环境中的功能至关重要.
研究的目的:
- 在一年内描述尼斯普林斯陆地蛇形化系统的微生物群落和地化学.
- 识别特有微生物种群及其对高性环境中的地化学过程的影响.
主要方法:
- 在一年内进行了六次采样活动,以使用16S rRNA基因调查分析微生物社区组成.
- 与地球化学参数相关的微生物社区数据.
- 利用元基因组组装基因组来推断微生物的代谢能力.
主要成果:
- 确定了93种安普利康序列变异 (ASV) 作为寄居微生物,其中16种始终包括1%以上的社区.
- 观察到核心微生物种群的丰度有显著的时间变化,与像氨水水平这样的地化学变化相关.
- 特定的微生物,如Tindallia,通过Stickland反应和硫氧化细菌与硫循环中间体产生氨.
结论:
- 一个稳定的核心微生物群落在塑造高性泉的地化学方面发挥着重要作用.
- 微生物的新陈代谢,包括Tindallia*产生的氨,有助于观察到的地球化学特征.
- 这项研究为蛇形化生态系统的动态及其天体生物学相关性提供了新的见解.
相关概念视频
01:27Diversity of Archaea III
33
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
33
01:24Diversity of Archaea II
39
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
39
01:30Diversity of Archaea I
35
Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
35
01:21Hyperthermophilic Bacteria
37
Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their...
37
01:20Sulfur Assimilation
45
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
45
01:29Diversity of Archaea IV
54
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
54