Defining Coral Bleaching as a Microbial Dysbiosis within the Coral Holobiont.
Symbiodiniaceae
adaptive dysbiosis hypothesis
coral bleaching
holobiont
microbiota
Journal
Microorganisms
ISSN: 2076-2607
Titre abrégé: Microorganisms
Pays: Switzerland
ID NLM: 101625893
Informations de publication
Date de publication:
29 Oct 2020
29 Oct 2020
Historique:
received:
05
10
2020
revised:
26
10
2020
accepted:
28
10
2020
entrez:
3
11
2020
pubmed:
4
11
2020
medline:
4
11
2020
Statut:
epublish
Résumé
Coral microbiomes are critical to holobiont health and functioning, but the stability of host-microbial interactions is fragile, easily shifting from eubiosis to dysbiosis. The heat-induced breakdown of the symbiosis between the host and its dinoflagellate algae (that is, "bleaching"), is one of the most devastating outcomes for reef ecosystems. Yet, bleaching tolerance has been observed in some coral species. This review provides an overview of the holobiont's diversity, explores coral thermal tolerance in relation to their associated microorganisms, discusses the hypothesis of adaptive dysbiosis as a mechanism of environmental adaptation, mentions potential solutions to mitigate bleaching, and suggests new research avenues. More specifically, we define coral bleaching as the succession of three holobiont stages, where the microbiota can (i) maintain essential functions for holobiont homeostasis during stress and/or (ii) act as a buffer to mitigate bleaching by favoring the recruitment of thermally tolerant Symbiodiniaceae species (adaptive dysbiosis), and where (iii) environmental stressors exceed the buffering capacity of both microbial and dinoflagellate partners leading to coral death.
Identifiants
pubmed: 33138319
pii: microorganisms8111682
doi: 10.3390/microorganisms8111682
pmc: PMC7692791
pii:
doi:
Types de publication
Journal Article
Review
Langues
eng
Subventions
Organisme : Natural Sciences and Engineering Research Council of Canada
ID : 6333
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