亚社区层面的网络分析揭示了湖泊沿海沉积物中独特的微生物动态
Vincent Tardy1,2,3, Emilie Lyautey4,5, Victor Frossard4,5
1Université Savoie Mont Blanc, INRAE, CARRTEL, Thonon-Les-Bains, 74200, France. vpm.tardy@gmail.com.
BMC microbiology
|December 30, 2025
概括
湖泊沉积物中的微生物群落是由社区层面的随机过程驱动的,但在更细微的尺度 (模块) 上,确定性因素变得更有影响力. 了解这些不同的尺度揭示了隐藏的生态动态.
科学领域:
- 生态生态学 生态生态学
- 微生物学 微生物学
- 环境科学 环境科学
背景情况:
- 湖泊沿海沉积物是各种微生物群落的宿主,具有动态的生态功能.
- 这些微生物群落的时间动态研究不足.
- 这项研究侧重于波尔杰湖表面沉积物微生物组的高分辨率时间变化.
研究的目的:
- 为了研究湖泊沉积物微生物群落的时间变化.
- 确定确定性和随机过程对不同组织规模的微生物动态的影响.
- 测试分析子社区 (模块) 是否揭示了整个社区层面上掩盖的生态驱动因素.
主要方法:
- 湖泊沿海沉积物的高分辨率采样超过五个月.
- 使用β-多样性指标分析微生物群落组成.
- 同时发生的网络分析和基于网络的聚类来识别微生物模块.
- 零模型分析和方差分区,以评估随机和决定性过程的作用.
主要成果:
- 随机过程在整个社区层面占主导地位,环境变量仅解释了17%的时间变化.
- 通过网络分析确定了六个不同的微生物模块.
- 在模块尺度上,环境变量解释了较大比例的时间变化 (高达51%),这表明环境过等更强大的决定性影响.
结论:
- 在多个组织尺度上分析微生物群落,可以更深入地了解时间动态.
- 更细微的分析 (网络模块) 揭示了在更广泛的社区层面上隐藏的生态模式和驱动因素.
- 这种多尺度的方法增强了对沉积物微生物组中随机和决定力之间的平衡的理解.
更多相关视频
08:09An Aquatic Microbial Metaproteomics Workflow: From Cells to Tryptic Peptides Suitable for Tandem Mass Spectrometry-based Analysis
Published on: September 15, 2015
9.2K
10:30Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
Published on: September 11, 2016
11.2K
相关概念视频
Microenvironments
Microorganisms inhabit highly localized spaces known as microenvironments, which are defined by distinct physical and chemical characteristics. These include oxygen concentration, pH, temperature, light availability, and nutrient levels. The conditions within a microenvironment can differ markedly from those in the surrounding area and significantly influence microbial growth, metabolism, and community structure.Microenvironments often display sharp physicochemical gradients over small spatial...
Microbial Mats
Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
Freshwater Microbial Ecology
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...
Soil Microbial Ecology
Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
