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Molecular Ecology - 2024 - Castro - Effect of marine heatwaves and warming on kelp microbiota influence trophic561.91 kB
Published VersionCC BY-NC-ND V4.0, Open Access
Journal article
Effect of marine heatwaves and warming on kelp microbiota influence trophic interactions
Molecular Ecology, Vol.33(5), pp.1-12
2024
PMID: 38230446
Abstract
The range-expansion of tropical herbivores due to ocean warming can profoundly alter temperate reef communities by overgrazing the seaweed forests that underpin them. Such ecological interactions may be mediated by changes to seaweed-associated microbiota in response to warming, but empirical evidence demonstrating this is rare. We experimentally simulated ocean warming and marine heatwaves (MHWs) to quantify effects on two dominant temperate seaweed species and their microbiota, as well as grazing by a tropical herbivore. The kelp Ecklonia radiata's microbiota in sustained warming and MHW treatments was enriched with microorganisms associated with seaweed disease and tissue degradation. In contrast, the fucoid Sargassum linearifolium's microbiota was unaffected by temperature. Consumption by the tropical sea-urchin Tripneustes gratilla was greater on Ecklonia where the microbiota had been altered by higher temperatures, while Sargassum's consumption was unaffected. Elemental traits (carbon, nitrogen), chemical defences (phenolics) and tissue bleaching of both seaweeds were generally unaffected by temperature. Effects of warming and MHWs on seaweed holobionts (host plus its microbiota) are likely species-specific. The effect of increased temperature on Ecklonia's microbiota and subsequent increased consumption suggest that changes to kelp microbiota may underpin kelp-herbivore interactions, providing novel insights into potential mechanisms driving change in species' interactions in warming oceans.
Details
- Title
- Effect of marine heatwaves and warming on kelp microbiota influence trophic interactions
- Authors
- Louise C. Castro (Author) - UNSW SydneyAdriana Verges (Author) - UNSW SydneySandra C. Straub (Author) - The University of Western AustraliaAlexandra H. Campbell (Author) - University of the Sunshine Coast, Queensland, School of Health - BiomedicineMelinda A. Coleman (Author) - New South Wales Department of Primary IndustriesThomas Wernberg (Author) - The University of Western AustraliaPeter Steinberg (Author) - UNSW SydneyTorsten Thomas (Author) - UNSW SydneySymon Dworjanyn (Author) - Southern Cross UniversityPaulina Cetina-Heredia (Author) - UNSW SydneyMoninya Roughan (Author) - UNSW SydneyEzequiel M. Marzinelli (Corresponding Author) - The University of Sydney
- Publication details
- Molecular Ecology, Vol.33(5), pp.1-12
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Date published
- 2024
- DOI
- 10.1111/mec.17267
- ISSN
- 1365-294X; 0962-1083
- PMID
- 38230446
- Copyright note
- © 2024 The Authors. Molecular Ecology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
- Data Availability
- Data available through the Dryad repository: https://doi.org/10.5061/dryad.vhhmgqns7
- Grants
- Organisation Unit
- School of Health - Biomedicine
- Language
- English
- Record Identifier
- 99999998702621
- Output Type
- Journal article
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