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Pathobiomes Differ between Two Diseases Affecting Reef Building Coralline Algae.

Anne-Leila Meistertzheim1,2, Maggy M Nugues2,3, Gaëlle Quéré2

  • 1CNRS, Laboratoire d'Ecogéochimie des Environnements Benthiques (LECOB), Observatoire Océanologique, Sorbonne Universités, UPMC Univ Paris 06Banyuls-sur-Mer, France.

Frontiers in Microbiology
|September 19, 2017
PubMed
Summary

The bacterial communities of diseased crustose coralline algae (CCA) differ from healthy algae. Coralline white band syndrome (CWBS) and coralline white patch disease (CWPD) have distinct bacterial profiles, suggesting different causes.

Keywords:
bacterial communitiesbacterial pathogencausative agentcoral reefscrustose coralline algaedisease

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Area of Science:

  • Marine Biology
  • Microbial Ecology
  • Coral Reef Ecology

Background:

  • Crustose coralline algae (CCA) are vital benthic calcifiers in coral reef ecosystems.
  • Two emerging diseases, coralline white band syndrome (CWBS) and coralline white patch disease (CWPD), cause significant CCA loss.
  • The causative agents of CWBS and CWPD remain unidentified.

Purpose of the Study:

  • To investigate the bacterial communities associated with healthy and diseased CCA.
  • To differentiate the microbial signatures of CWBS and CWPD.
  • To identify potential causative agents for these CCA diseases.

Main Methods:

  • Bacterial 16S rRNA gene sequencing was performed on healthy and diseased CCA tissues.
  • Comparative analysis of microbial community composition between healthy and diseased states.
  • Identification of distinct bacterial taxa associated with CWBS and CWPD.

Main Results:

  • Diseased *Neogoniolithon mamillare* tissues exhibited distinct bacterial communities compared to healthy tissues.
  • CWBS and CWPD were associated with different bacterial pathobiomes, indicating separate disease etiologies.
  • CWPD pathobiomes were characterized by a *Vibrio* species related to *Vibrio tubiashii*, suggesting a potential role in disease causation and a link to warming temperatures.

Conclusions:

  • Bacterial community structure differs significantly between healthy and diseased CCA.
  • CWBS and CWPD are distinct diseases with different microbial drivers.
  • A *Vibrio* species is a putative agent of CWPD, potentially linked to climate change and warming seas.