Related Experiment Video
Updated: Jun 30, 2026
09:57
Characterizing Microbiome Dynamics – Flow Cytometry Based Workflows from Pure Cultures to Natural Communities
Published on: July 12, 2018
Community state shifts driven by total carbon availability over resource complexity in a synthetic microbial
Anna M Bischofberger1, Johannes Cairns1,2,3,4,5, Inga-Katariina Aapalampi1
1Department of Biology, University of Turku, Turku, Turku 20014, Finland.
ISME Communications
|June 29, 2026
Summary
Total carbon availability, not resource complexity, significantly shapes microbial community composition and state transitions. Lag phase duration predicts competitive success at extreme carbon levels, guiding microbial community management.
Area of Science:
- Microbial Ecology
- Community Dynamics
- Ecosystem Function
Background:
- Complex microbial communities are vital for ecosystems, yet their assembly and dynamics remain poorly understood.
- A key debate concerns predicting community behavior from pairwise competition and identifying factors leading to alternative stable states.
Purpose of the Study:
- To investigate the impact of total carbon availability and resource complexity on microbial community composition.
- To determine how these resource gradients influence community assembly and stability.
Main Methods:
- A 16-day serial passage experiment using a 16-species synthetic microbial community.
- Cultivation in 96 distinct resource environments varying in carbon availability and complexity.
- Monoculture assays to assess species' growth traits and competitive success.
Main Results:
- Total carbon availability had a greater effect on community composition than resource complexity.
- Distinct community state shifts were observed along the total carbon gradient, but not the resource complexity gradient.
- Lag phase duration was the primary predictor of competitive success at extreme carbon levels, with maximum growth rate becoming more important as lag times converged.
Conclusions:
- Total carbon level is a more critical factor than resource complexity in structuring microbial communities.
- Understanding species' growth traits, particularly lag phase duration, is key to predicting competitive success and managing microbial communities.
- These findings offer insights for manipulating and maintaining complex microbial ecosystems.
Keywords:
carbon availabilitycommunity assemblyexperimental ecologymicrobial ecologyregime shiftresource complexityresource gradientsynthetic communitiesMore Related Videos
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
05:44Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria
Published on: December 27, 2024
Related Concept Videos
01:30Marine 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...
01:24Freshwater 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...
01:25Microbial 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...
01:22Microenvironments
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...
01:24Microbes and the Carbon Cycle
The carbon cycle is a fundamental Earth process involving the transfer of carbon among the biosphere, lithosphere, atmosphere, and hydrosphere. It plays a critical role in regulating the planet’s climate and supporting life by cycling carbon through various chemical forms and reservoirs. Carbon primarily circulates as carbon dioxide (CO₂), representing its oxidized form, while reduced forms such as methane (CH₄) and organic compounds also play essential roles.Microbial activity is central to...
01:19Methods to Assess Microbial Communities
Microbial communities, comprising bacteria, archaea, and eukaryotic microorganisms, inhabit diverse ecosystems and play crucial roles in environmental and biological processes. Their diversity is defined by three main parameters: species richness (the number of distinct species), species abundance (the relative quantity of each species), and species evenness (how uniformly individual species are distributed in various locations). These factors together shape the structure and ecological balance...