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Hierarchical settlement behaviours of coral larvae to common coralline algae
Abdul Wahab, M.A.; Ferguson, S.; Snekkevik, V.K.; McCutchan, G.; Jeong, S.; Severati, A.; Randall, C.J.; Negri, A.P.; Diáz-Pulido, G. (2023). Hierarchical settlement behaviours of coral larvae to common coralline algae. NPG Scientific Reports 13(1): 5795. https://dx.doi.org/10.1038/s41598-023-32676-4
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
|   |
| Auteurs | | Top |
- Abdul Wahab, M.A.
- Ferguson, S.
- Snekkevik, V.K.
|
- McCutchan, G.
- Jeong, S.
- Severati, A.
|
- Randall, C.J.
- Negri, A.P.
- Diáz-Pulido, G.
|
| Abstract |
Natural regeneration of degraded reefs relies on the recruitment of larvae to restore populations. Intervention strategies are being developed to enhance this process through aquaculture production of coral larvae and their deployment as spat. Larval settlement relies on cues associated with crustose coralline algae (CCA) that are known to induce attachment and metamorphosis. To understand processes underpinning recruitment, we tested larval settlement responses of 15 coral species, to 15 species of CCA from the Great Barrier Reef (GBR). CCA in the family Lithophyllaceae were overall the best inducer across most coral species, with Titanoderma cf. tessellatum being the most effective species that induced at least 50% settlement in 14 of the coral species (mean 81%). Taxonomic level associations were found, with species of Porolithon inducing high settlement in the genus Acropora; while a previously understudied CCA, Sporolithon sp., was a strong inducer for the Lobophyllidae. Habitat-specific associations were detected, with CCA collected from similar light environment as the coral inducing higher levels of settlement. This study revealed the intimate relationships between coral larvae and CCA and provides optimal coral-algal species pairings that could be utilized to increase the success of larval settlement to generate healthy spat for reef restoration. |
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