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Published (Version of record)CC BY-NC-ND V4.0, Open Access
Published (Version of record)CC BY-NC-ND V4.0, Open
Journal article
Effect of marine heatwaves and warming on kelp microbiota influence trophic interactions
Molecular ecology, Vol.33(5), e17267
03/2024
PMID: 38230446
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Source: InCites
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
- Creators
- Louise C Castro - University of New South WalesAdriana Vergés - University of New South WalesSandra C Straub - The University of Western AustraliaAlexandra H Campbell - University of the Sunshine CoastMelinda A Coleman - Department of Primary Industries, Coffs Harbour, New South Wales, AustraliaThomas Wernberg - The University of Western AustraliaPeter Steinberg - University of New South WalesTorsten Thomas - University of New South WalesSymon Dworjanyn - Southern Cross UniversityPaulina Cetina-Heredia - University of New South WalesMoninya Roughan - University of New South WalesEzequiel M Marzinelli - Sydney Institute of Marine Science
- Publication Details
- Molecular ecology, Vol.33(5), e17267
- Publisher
- Wiley-Blackwell Publishing Ltd.
- Grant note
- DP160100114 / Australian Research Council LP150100064 / Australian Research Council DP170100023 / Australian Research Council DP180104041 / Australian Research Council
- Identifiers
- 991013161812702368
- Copyright
- © 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.
- Academic Unit
- Faculty of Science and Engineering; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article