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Related Experiment Video

Updated: Apr 6, 2026

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Caenorhabditis elegans populations shape their microbial environment.

Rahul Bodkhe1, Kris Sankaran2, Michael Shapira3

  • 1Department of Integrative Biology University of California, Berkeley, CA, USA. rahulbiosciences@gmail.com.

NPJ Biofilms and Microbiomes
|April 4, 2026
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Summary

The study found that the nematode Caenorhabditis elegans shapes its surrounding microbial environment. Worm presence influences microbial diversity and composition, indicating nematodes play a role in ecosystem modulation.

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Area of Science:

  • Ecology
  • Microbiology
  • Environmental Science

Background:

  • Nematodes are abundant and ecologically significant, crucial for organic matter cycling.
  • The impact of nematodes on their microbial environments is not well understood.
  • Caenorhabditis elegans, a bacterivore nematode, assembles a distinct gut microbiome.

Purpose of the Study:

  • To investigate the effects of the nematode Caenorhabditis elegans on its microbial environment.
  • To determine if C. elegans influences microbial diversity and community composition over time.

Main Methods:

  • Germ-free C. elegans populations were cultured in distinct natural-like environments for four generations.
  • Environmental and worm-associated microbial communities were analyzed using 16S rRNA gene sequencing.
  • Microbial diversity and composition were compared between environments with and without worms.

Main Results:

  • Microbial diversity increased in all environments, but trajectories differed with the presence of worms.
  • Worm presence led to the convergence of microbial environment composition over time.
  • The abundance of specific bacterial families, part of the C. elegans gut microbiome, was significantly affected by the worms.

Conclusions:

  • C. elegans actively shapes its microbial environment, not just responds to it.
  • Nematodes may play a significant role in modulating environmental microbial diversity and ecosystem functions.
  • This research highlights a novel ecological role for nematodes in microbial community dynamics.