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Related Experiment Video

Updated: Jul 24, 2025

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Microeukaryotic predators shape the wastewater microbiome.

Nils Heck1, Jule Freudenthal1, Kenneth Dumack1

  • 1Terrestrial Ecology, Institute of Zoology, University of Cologne, Zülpicher Str. 47b, Köln 50674, Germany.

Water Research
|July 8, 2023
PubMed
Summary

Wastewater prokaryotes are not affected by temperature but by microeukaryotes. Microeukaryotic predation significantly shapes the prokaryotic community in wastewater treatment systems.

Keywords:
Biotic interactionsFood webMetatranscriptomicsPredationProtistsWastewater treatment

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Area of Science:

  • Environmental microbiology
  • Wastewater treatment microbiology

Background:

  • Physicochemical parameters influencing wastewater prokaryotes are well-studied.
  • The role of biotic interactions, particularly microeukaryotes, in shaping wastewater prokaryotic communities remains poorly understood.

Purpose of the Study:

  • To investigate the impact of biotic interactions on prokaryotic community composition in wastewater.
  • To explore the role of microeukaryotes in the wastewater microbiome.

Main Methods:

  • Utilized metatranscriptomics data from a bioreactor sampled over 14 months.
  • Analyzed seasonal variations and their impact on prokaryotic and microeukaryotic communities.

Main Results:

  • Prokaryotic communities in wastewater were unaffected by seasonal temperature changes.
  • A seasonal, temperature-induced shift in the microeukaryotic community significantly impacted prokaryotes.
  • Selective predation by microeukaryotes emerged as a key factor influencing prokaryotic composition.

Conclusions:

  • Microbial predation is a significant driver of prokaryotic community structure in wastewater.
  • A holistic approach, including microeukaryotes, is crucial for understanding wastewater treatment processes.