氨和酸盐氧化微生物在分层湖泊水柱中的深度依赖分布模式
Albin Alfreider1, Thomas Posch2, Monika Summerer3
1Department of Ecology, University of Innsbruck, 6020, Innsbruck, Austria. albin.alfreider@uibk.ac.at.
Scientific reports
|November 23, 2025
概括
这项研究揭示了分明的氨和亚酸盐氧化 prokaryote 社区在分层湖泊,受湖泊类型和深度的影响. 化剂的分布与氧气和水平有关,影响循环.
科学领域:
- 临界技术 临界技术
- 微生物生态学 微生物生态学
- 环境微生物学 环境微生物学
背景情况:
- 分层湖泊拥有各种微生物群落,对营养循环至关重要.
- 氧化氨和酸盐的核细胞在化中发挥关键作用,这是水生生态系统中至关重要的过程.
- 了解化剂分布对于评估湖泊健康和预算至关重要.
研究的目的:
- 在分层的湖水柱中研究氨和酸盐氧化核细胞的发生和多样性.
- 为了确定湖泊类型和深度对化者社区组成的影响.
- 阐明化剂和无氧氨氧化细菌 (Anammox) 与环境梯度相关的利基偏好.
主要方法:
- 从DNA和RNA提取物中分析16SrRNA基因,以评估化物种群.
- 在大而深的湖泊 (苏黎世湖,阿琴湖) 和较小的湖泊 (皮伯格湖,海赫特湖) 中微生物群落的比较.
- 滴滴数字PCR (ddPCR) 精确量化厌氧氨氧化细菌 (Ca. 亚纳莫克西微生物 (Anammoximicrobium) 是一种生物.
主要成果:
- 化物的分类学组成在湖泊类型之间和深度之间有很大差异.
- 在大而深的湖泊中,氧化过的低膜被Ca.主导. 尼特罗斯米卢斯,而尼特罗斯皮拉显示出更高的核糖体活性.
- 较小的湖泊显示出明显的化社区,其中包括Ca. 无毒性低血压症的主导性和与氨度相关的anammoximicrobium.
结论:
- 取决于深度的环境梯度,特别是氧气和的可用性,是化剂和Anammox细菌在湖泊中的分布的关键驱动因素.
- 化器社区结构在湖泊类型之间存在差异,反映了适应特定环境条件的情况.
- 这项研究增强了我们对分层水生生态系统中微生物循环的理解.
相关概念视频
Metabolism of Chemolithotrophs
733
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.
733
Diversity of Protists III
713
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
713
Diversity of Archaea II
433
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...
433
Oxygen Requirements and Growth Patterns
1.1K
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
1.1K
Diversity of Archaea I
518
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...
518
Inorganic Nitrogen Assimilation
436
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
436


