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Coral larval settlement preferences linked to crustose coralline algae with distinct chemical and microbial signatures
Jorissen, H.; Galand, P.E.; Bonnard, I.; Meiling, S.; Raviglione, D.; Meistertzheim, A.-L.; Hedouin, L.; Banaigs, B.; Payri, C.E.; Nugues, M.M. (2021). Coral larval settlement preferences linked to crustose coralline algae with distinct chemical and microbial signatures. NPG Scientific Reports 11(1): 14610. https://dx.doi.org/10.1038/s41598-021-94096-6
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
|   |
| Auteurs | | Top |
- Jorissen, H.
- Galand, P.E.
- Bonnard, I.
- Meiling, S.
|
- Raviglione, D.
- Meistertzheim, A.-L.
- Hedouin, L.
|
- Banaigs, B.
- Payri, C.E.
- Nugues, M.M.
|
| Abstract |
The resilience of coral reefs is dependent on the ability of corals to settle after disturbances. While crustose coralline algae (CCA) are considered important substrates for coral settlement, it remains unclear whether coral larvae respond to CCA metabolites and microbial cues when selecting sites for attachment and metamorphosis. This study tested the settlement preferences of an abundant coral species (Acropora cytherea) against six different CCA species from three habitats (exposed, subcryptic and cryptic), and compared these preferences with the metabolome and microbiome characterizing the CCA. While all CCA species induced settlement, only one species (Titanoderma prototypum) significantly promoted settlement on the CCA surface, rather than on nearby dead coral or plastic surfaces. This species had a very distinct bacterial community and metabolomic fingerprint. Furthermore, coral settlement rates and the CCA microbiome and metabolome were specific to the CCA preferred habitat, suggesting that microbes and/or chemicals serve as environmental indicators for coral larvae. Several amplicon sequence variants and two lipid classes—glycoglycerolipids and betaine lipids—present in T. prototypum were identified as potential omic cues influencing coral settlement. These results support that the distinct microbiome and metabolome of T. prototypum may promote the settlement and attachment of coral larvae. |
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