Microbial community structure and settlement induction capacity of marine biofilms developed under varied reef conditions
Coral larval settlement relies on biogenic cues such as those elicited by microbial biofilm communities, a crucial element of coral recruitment. Eutrophication can modify these biofilm-associated communities, but studies on how this affects coral larval settlement are limited. In this study, we deve...
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Veröffentlicht in: | Marine pollution bulletin 2023-08, Vol.193, p.115138-115138, Article 115138 |
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Sprache: | eng |
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Zusammenfassung: | Coral larval settlement relies on biogenic cues such as those elicited by microbial biofilm communities, a crucial element of coral recruitment. Eutrophication can modify these biofilm-associated communities, but studies on how this affects coral larval settlement are limited. In this study, we developed biofilm communities on glass slides at four sites with increasing distance from a mariculture zone. Biofilms farthest from the mariculture area were more effective at inducing the settlement of Acropora tenuis larvae. These biofilms were characterized by a greater proportion of crustose coralline algae (CCA) and gammaproteobacterial taxa compared to biofilms from sites closer to the mariculture zone, which had a greater proportion of cyanobacteria and no CCA. These findings suggest that nutrient enrichment due to mariculture activities alters the composition of biofilm-associated microbiome at nearby reef sites and indirectly causes poor coral larval settlement.
•16S & 18S rRNA sequencing to assess mariculture impact on marine biofilms.•Biofilm community structure was altered by mariculture-induced eutrophication.•Shifts in biofilm community structure affected Acropora tenuis larval settlement.•Eutrophication from mariculture reaches nearby reefs and affects coral recruitment. |
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ISSN: | 0025-326X 1879-3363 |
DOI: | 10.1016/j.marpolbul.2023.115138 |