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Coral thermal stress and bleaching enrich and restructure reef microbial communities via altered organic matter exudation
Sparagon, W.J.; Arts, M.G.I.; Quinlan, Z.A.; Wegley Kelly, L.; Koester, I.; Comstock, J.; Bullington, J.A.; Carlson, C.A.; Dorrestein, P.C.; Aluwihare, L.I.; Haas, A.F.; Nelson, C.E. (2024). Coral thermal stress and bleaching enrich and restructure reef microbial communities via altered organic matter exudation. Communications Biology 7(1): 160. https://dx.doi.org/10.1038/s42003-023-05730-0
In: Communications Biology. Nature Portfolio: Berlin. e-ISSN 2399-3642, meer
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| Author keywords |
Coral reefs; Microbial biooceanography; Microbial ecology; Water microbiology |
| Auteurs | | Top |
- Sparagon, W.J.
- Arts, M.G.I., meer
- Quinlan, Z.A.
- Wegley Kelly, L.
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- Koester, I.
- Comstock, J.
- Bullington, J.A.
- Carlson, C.A.
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- Dorrestein, P.C.
- Aluwihare, L.I.
- Haas, A.F., meer
- Nelson, C.E.
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| Abstract |
Coral bleaching is a well-documented and increasingly widespread phenomenon in reefs across the globe, yet there has been relatively little research on the implications for reef water column microbiology and biogeochemistry. A mesocosm heating experiment and bottle incubation compared how unbleached and bleached corals alter dissolved organic matter (DOM) exudation in response to thermal stress and subsequent effects on microbial growth and community structure in the water column. Thermal stress of healthy corals tripled DOM flux relative to ambient corals. DOM exudates from stressed corals (heated and/or previously bleached) were compositionally distinct from healthy corals and significantly increased growth of bacterioplankton, enriching copiotrophs and putative pathogens. Together these results demonstrate how the impacts of both short-term thermal stress and long-term bleaching may extend into the water column, with altered coral DOM exudation driving microbial feedbacks that influence how coral reefs respond to and recover from mass bleaching events. |
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