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Updated: Feb 15, 2026

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

Published on: December 25, 2015

Initial evenness determines diversity and cell density dynamics in synthetic microbial ecosystems.

Elham Ehsani¹, Emma Hernandez-Sanabria¹, Frederiek-Maarten Kerckhof¹

¹Center for Microbial Ecology and Technology (CMET), Coupure Links 653, 9000, Ghent, Belgium.

Scientific Reports

|January 12, 2018

Summary

Initial species evenness significantly impacts synthetic microbial community dynamics and cell density over time. Highly even communities maintain higher cell densities, highlighting the importance of initial evenness in ecological studies.

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Area of Science:

Microbial Ecology
Community Dynamics
Synthetic Ecosystems

Background:

The influence of initial species evenness on the temporal development of synthetic microbial communities is not well understood.
Microcosm studies are crucial for investigating ecological principles under controlled conditions.

Purpose of the Study:

To investigate how initial evenness affects the temporal trajectory of synthetic microbial communities.
To compare the efficacy of flow cytometry and 16S rRNA gene sequencing in assessing community structure changes.

Main Methods:

Utilized flow cytometric fingerprinting and 16S rRNA gene amplicon sequencing.
Established one hundred synthetic microbial ecosystems with fixed richness but varying initial evenness.
Monitored community structure and cell density over time through multiple transfers.

Main Results:

Both methods indicated a reduction in diversity in medium and high initial evenness communities.
16S rRNA gene sequencing revealed no significant differences in community structure across evenness groups by the experiment's end.
Initial evenness significantly influenced final cell density, with highly even communities exhibiting the greatest density.
Species relative abundances correlated with initial evenness, suggesting species-specific dependencies.

Conclusions:

Initial species evenness is a critical factor influencing the temporal dynamics and overall cell density of synthetic microbial communities.
The assessment of initial evenness is essential before employing synthetic communities for ecological hypothesis testing.
Flow cytometry and 16S rRNA gene sequencing provide complementary insights into microbial community structure and diversity.