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Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins
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Top-heavy trophic structure within benthic viral dark matter.

Ethan C Cissell1, Sophie J McCoy1

  • 1Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.

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Summary

This study reveals viruses are active in coral reef cyanobacterial mats, showing a top-heavy trophic structure. It provides a new database of Caribbean mat viruses (vMAT) for understanding reef health.

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Area of Science:

  • Marine Microbiology
  • Viral Ecology
  • Coral Reef Ecology

Background:

  • Coral reefs face degradation, with benthic cyanobacterial mats being a significant factor.
  • Understanding viral roles in these proliferating mats is crucial for predicting ecosystem dynamics.

Purpose of the Study:

  • To characterize viral communities and virus-host interactions in Caribbean coral reef benthic cyanobacterial mats.
  • To assess the trophic structure and ecological significance of viruses within these mat ecosystems.

Main Methods:

  • Deep longitudinal multi-omic sequencing (ssDNA, dsDNA, dsRNA viruses) of mat samples.
  • Genomic analyses including gene-sharing networks to identify viral novelty.
  • Analysis of virus-host abundance and activity ratios using coverage data.

Main Results:

  • 11,012 unique viral populations from at least 10 viral families were identified.
  • Evidence of extensive genomic novelty among mat viruses was found.
  • Virus-host abundance and activity ratios consistently exceeded 1:1, indicating a top-heavy trophic structure.

Conclusions:

  • Viruses are active and significant components of coral reef benthic cyanobacterial mat communities.
  • The study establishes the vMAT database, a valuable resource for Caribbean coral reef research.
  • Findings have implications for understanding mat functional ecology, demography, and coral reef health.