Changing nutritional seascapes of kelp forests
Ocean warming and short-term extreme events (e.g. marine heatwaves) are becoming more intense and frequent and have had major impacts on ecosystems. Seaweeds are foundational components of temperate reefs, providing nutrition for a diversity of species and underpinning temperate food webs. While the...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-11-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1197468/full |
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| author | Tanika C. Shalders Tanika C. Shalders Curtis Champion Curtis Champion Kirsten Benkendorff Tom Davis Tom Davis Thomas Wernberg Thomas Wernberg Stephen Morris Melinda A. Coleman Melinda A. Coleman Melinda A. Coleman |
| author_facet | Tanika C. Shalders Tanika C. Shalders Curtis Champion Curtis Champion Kirsten Benkendorff Tom Davis Tom Davis Thomas Wernberg Thomas Wernberg Stephen Morris Melinda A. Coleman Melinda A. Coleman Melinda A. Coleman |
| author_sort | Tanika C. Shalders |
| collection | DOAJ |
| description | Ocean warming and short-term extreme events (e.g. marine heatwaves) are becoming more intense and frequent and have had major impacts on ecosystems. Seaweeds are foundational components of temperate reefs, providing nutrition for a diversity of species and underpinning temperate food webs. While the impacts of climate-driven environmental change on seaweed distribution, abundance and interactions are well studied, potential impacts on the provision of nutrients from seaweeds and their availability to consumers remain poorly understood. Here, we use metabolomic and lipidomic approaches to understand how the provision of nutrients from key seaweeds may be altered under climate change. We optimize a small-scale microextraction technique to test the effects of warming and marine heatwaves on the nutritional quality of two Australian habitat-forming seaweeds; Ecklonia and Sargassum. We then model changes in lipid availability in response to climate-driven ocean warming throughout Ecklonia’s eastern Australian distribution. Contrary to expectations, ocean warming and marine heatwaves had limited effects on seaweed nutritional quality, indicating resilience in the nutritional value of these species to climate-driven warming. However, nutritional quality varied significantly between species, which presents new implications for predicted species redistributions from the base of the food chain. Modelling revealed a projected net loss of 3.5% of lipids across the east coast of Australia by 2100 under RCP 8.5 in response to shifts in the redistribution of Ecklonia biomass. The climate-driven redistribution of seaweeds is likely to alter the availability of seaweed-derived nutrients to consumers, which may have broad implications for the transfer of energy within temperate marine food webs. |
| first_indexed | 2024-03-10T07:50:42Z |
| format | Article |
| id | doaj.art-d427c7690b66427a9eec8d35404298a0 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-03-10T07:50:42Z |
| publishDate | 2023-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-d427c7690b66427a9eec8d35404298a02023-11-22T12:19:41ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-11-011010.3389/fmars.2023.11974681197468Changing nutritional seascapes of kelp forestsTanika C. Shalders0Tanika C. Shalders1Curtis Champion2Curtis Champion3Kirsten Benkendorff4Tom Davis5Tom Davis6Thomas Wernberg7Thomas Wernberg8Stephen Morris9Melinda A. Coleman10Melinda A. Coleman11Melinda A. Coleman12Faculty of Science and Engineering, National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, AustraliaFisheries Research, New South Wales (NSW) Department of Primary Industries, National Marine Science Centre, Coffs Harbour, NSW, AustraliaFaculty of Science and Engineering, National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, AustraliaFisheries Research, New South Wales (NSW) Department of Primary Industries, National Marine Science Centre, Coffs Harbour, NSW, AustraliaFaculty of Science and Engineering, National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, AustraliaFaculty of Science and Engineering, National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, AustraliaFisheries Research, New South Wales (NSW) Department of Primary Industries, National Marine Science Centre, Coffs Harbour, NSW, AustraliaThe University of Western Australia (UWA) Oceans Institute & School of Biological Sciences, University of Western Australia, Perth, WA, AustraliaFlødevigen Research Station, Institute of Marine Research, His, NorwayNew South Wales Department of Primary Industries, Wollongbar Primary Industries Institute, Wollongbar, NSW, AustraliaFaculty of Science and Engineering, National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, AustraliaFisheries Research, New South Wales (NSW) Department of Primary Industries, National Marine Science Centre, Coffs Harbour, NSW, AustraliaThe University of Western Australia (UWA) Oceans Institute & School of Biological Sciences, University of Western Australia, Perth, WA, AustraliaOcean warming and short-term extreme events (e.g. marine heatwaves) are becoming more intense and frequent and have had major impacts on ecosystems. Seaweeds are foundational components of temperate reefs, providing nutrition for a diversity of species and underpinning temperate food webs. While the impacts of climate-driven environmental change on seaweed distribution, abundance and interactions are well studied, potential impacts on the provision of nutrients from seaweeds and their availability to consumers remain poorly understood. Here, we use metabolomic and lipidomic approaches to understand how the provision of nutrients from key seaweeds may be altered under climate change. We optimize a small-scale microextraction technique to test the effects of warming and marine heatwaves on the nutritional quality of two Australian habitat-forming seaweeds; Ecklonia and Sargassum. We then model changes in lipid availability in response to climate-driven ocean warming throughout Ecklonia’s eastern Australian distribution. Contrary to expectations, ocean warming and marine heatwaves had limited effects on seaweed nutritional quality, indicating resilience in the nutritional value of these species to climate-driven warming. However, nutritional quality varied significantly between species, which presents new implications for predicted species redistributions from the base of the food chain. Modelling revealed a projected net loss of 3.5% of lipids across the east coast of Australia by 2100 under RCP 8.5 in response to shifts in the redistribution of Ecklonia biomass. The climate-driven redistribution of seaweeds is likely to alter the availability of seaweed-derived nutrients to consumers, which may have broad implications for the transfer of energy within temperate marine food webs.https://www.frontiersin.org/articles/10.3389/fmars.2023.1197468/fullEcklonia radiatamarine heatwavesnutritional qualityocean warmingSargassum linearifoliumspecies distributions |
| spellingShingle | Tanika C. Shalders Tanika C. Shalders Curtis Champion Curtis Champion Kirsten Benkendorff Tom Davis Tom Davis Thomas Wernberg Thomas Wernberg Stephen Morris Melinda A. Coleman Melinda A. Coleman Melinda A. Coleman Changing nutritional seascapes of kelp forests Frontiers in Marine Science Ecklonia radiata marine heatwaves nutritional quality ocean warming Sargassum linearifolium species distributions |
| title | Changing nutritional seascapes of kelp forests |
| title_full | Changing nutritional seascapes of kelp forests |
| title_fullStr | Changing nutritional seascapes of kelp forests |
| title_full_unstemmed | Changing nutritional seascapes of kelp forests |
| title_short | Changing nutritional seascapes of kelp forests |
| title_sort | changing nutritional seascapes of kelp forests |
| topic | Ecklonia radiata marine heatwaves nutritional quality ocean warming Sargassum linearifolium species distributions |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1197468/full |
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