The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanica
IntroductionThe rapid increase in sea-water temperatures and frequency of extreme thermal events have amplified the risk of functional extinction of Mediterranean species such as the endemic long-lived seagrass Posidonia oceanica. Because of the valuable ecological functions and ecosystem services t...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-07-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1183728/full |
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| author | Alessandro Rinaldi Alessandro Rinaldi Marco Martinez Fabio Badalamenti Fabio Badalamenti Fabio Badalamenti Fabio Badalamenti Giovanni D’Anna Simone Mirto Simone Mirto Lazaro Marín-Guirao Lazaro Marín-Guirao Gabriele Procaccini Gabriele Procaccini Valeria Montalto Valeria Montalto |
| author_facet | Alessandro Rinaldi Alessandro Rinaldi Marco Martinez Fabio Badalamenti Fabio Badalamenti Fabio Badalamenti Fabio Badalamenti Giovanni D’Anna Simone Mirto Simone Mirto Lazaro Marín-Guirao Lazaro Marín-Guirao Gabriele Procaccini Gabriele Procaccini Valeria Montalto Valeria Montalto |
| author_sort | Alessandro Rinaldi |
| collection | DOAJ |
| description | IntroductionThe rapid increase in sea-water temperatures and frequency of extreme thermal events have amplified the risk of functional extinction of Mediterranean species such as the endemic long-lived seagrass Posidonia oceanica. Because of the valuable ecological functions and ecosystem services the species provides, understanding the life-stage specific thermal vulnerability is crucial to accurately predict the consequences of current and future global climate change and to protect and conserve existing meadows.MethodsTo this end, here we report a study on the ontogeny-specific thermal sensitivity of important physiological functions (i.e. respiration and net production) of three different early life history stages of P. oceanica, namely seed, seedling (4-month-old individuals) and 16-month-old plantlet by measuring thermal performance curves (eleven temperatures treatments between 15-36°C with n=8).ResultsAll three stages examined showed photosynthetic activity during light exposure with similar optimal temperatures for both net and gross production. Gross photosynthesis increased with rising temperature up to 28-30°C, subsequently declining at higher temperatures until complete inhibition at 36°C. The metabolic response of seeds was found to be temperature-dependent up to 26°C, while respiration of seedlings and plantlets was almost stable up to 28-30°C, but increased markedly at higher temperatures, resulting in a negative whole-plant C balance at temperatures above 32°C. Overall, our results show that seedlings and plantlets tolerate a wider temperature range (15 - 32°C) than seeds, which experience metabolic and physiological dysfunction from 26-28°C onwards.DiscussionThese findings suggest that the impact of warming on recruitment in P. oceanica meadows may vary depending on the timing of marine heatwaves (i.e. mid-spring to mid-autumn) and provide useful knowledge to inform restoration programs using early life stages of the species. In conclusion, the study of physiological responses during the early life stages of species is key to identify life history stages that are particularly vulnerable to climate change, which is vital knowledge for ecosystem management and conservation. |
| first_indexed | 2024-03-12T22:27:49Z |
| format | Article |
| id | doaj.art-96eb03ce40b14791bb6dc87f8449b703 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-03-12T22:27:49Z |
| publishDate | 2023-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-96eb03ce40b14791bb6dc87f8449b7032023-07-21T20:34:16ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-07-011010.3389/fmars.2023.11837281183728The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanicaAlessandro Rinaldi0Alessandro Rinaldi1Marco Martinez2Fabio Badalamenti3Fabio Badalamenti4Fabio Badalamenti5Fabio Badalamenti6Giovanni D’Anna7Simone Mirto8Simone Mirto9Lazaro Marín-Guirao10Lazaro Marín-Guirao11Gabriele Procaccini12Gabriele Procaccini13Valeria Montalto14Valeria Montalto15Istituto per lo studio degli impatti Antropici e sostenibilità in ambiente Marino, Consiglio Nazionale delle Ricerche Complesso monumentale ex-Roosevelt, Palermo, ItalyNational Biodiversity Future Centre (NBFC), Palermo, ItalyIstituto per lo studio degli impatti Antropici e sostenibilità in ambiente Marino, Consiglio Nazionale delle Ricerche Complesso monumentale ex-Roosevelt, Palermo, ItalyIstituto per lo studio degli impatti Antropici e sostenibilità in ambiente Marino, Consiglio Nazionale delle Ricerche Complesso monumentale ex-Roosevelt, Palermo, ItalyNational Biodiversity Future Centre (NBFC), Palermo, ItalySchool of Geosciences, University of Edinburgh, Edinburgh, United KingdomDepartment of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, ItalyIstituto per lo studio degli impatti Antropici e sostenibilità in ambiente Marino, Consiglio Nazionale delle Ricerche (IAS-CNR), Castellammare del Golfo, TP, ItalyIstituto per lo studio degli impatti Antropici e sostenibilità in ambiente Marino, Consiglio Nazionale delle Ricerche Complesso monumentale ex-Roosevelt, Palermo, ItalyNational Biodiversity Future Centre (NBFC), Palermo, ItalyDepartment of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, ItalySeagrass Ecology Group, Spanish Institute of Oceanography (IEO, CSIC), San Pedro del Pinatar, Murcia, SpainNational Biodiversity Future Centre (NBFC), Palermo, ItalyDepartment of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Naples, ItalyIstituto per lo studio degli impatti Antropici e sostenibilità in ambiente Marino, Consiglio Nazionale delle Ricerche Complesso monumentale ex-Roosevelt, Palermo, ItalyNational Biodiversity Future Centre (NBFC), Palermo, ItalyIntroductionThe rapid increase in sea-water temperatures and frequency of extreme thermal events have amplified the risk of functional extinction of Mediterranean species such as the endemic long-lived seagrass Posidonia oceanica. Because of the valuable ecological functions and ecosystem services the species provides, understanding the life-stage specific thermal vulnerability is crucial to accurately predict the consequences of current and future global climate change and to protect and conserve existing meadows.MethodsTo this end, here we report a study on the ontogeny-specific thermal sensitivity of important physiological functions (i.e. respiration and net production) of three different early life history stages of P. oceanica, namely seed, seedling (4-month-old individuals) and 16-month-old plantlet by measuring thermal performance curves (eleven temperatures treatments between 15-36°C with n=8).ResultsAll three stages examined showed photosynthetic activity during light exposure with similar optimal temperatures for both net and gross production. Gross photosynthesis increased with rising temperature up to 28-30°C, subsequently declining at higher temperatures until complete inhibition at 36°C. The metabolic response of seeds was found to be temperature-dependent up to 26°C, while respiration of seedlings and plantlets was almost stable up to 28-30°C, but increased markedly at higher temperatures, resulting in a negative whole-plant C balance at temperatures above 32°C. Overall, our results show that seedlings and plantlets tolerate a wider temperature range (15 - 32°C) than seeds, which experience metabolic and physiological dysfunction from 26-28°C onwards.DiscussionThese findings suggest that the impact of warming on recruitment in P. oceanica meadows may vary depending on the timing of marine heatwaves (i.e. mid-spring to mid-autumn) and provide useful knowledge to inform restoration programs using early life stages of the species. In conclusion, the study of physiological responses during the early life stages of species is key to identify life history stages that are particularly vulnerable to climate change, which is vital knowledge for ecosystem management and conservation.https://www.frontiersin.org/articles/10.3389/fmars.2023.1183728/fulldark respirationextreme climate eventsgross photosynthesisnet productionresilience |
| spellingShingle | Alessandro Rinaldi Alessandro Rinaldi Marco Martinez Fabio Badalamenti Fabio Badalamenti Fabio Badalamenti Fabio Badalamenti Giovanni D’Anna Simone Mirto Simone Mirto Lazaro Marín-Guirao Lazaro Marín-Guirao Gabriele Procaccini Gabriele Procaccini Valeria Montalto Valeria Montalto The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanica Frontiers in Marine Science dark respiration extreme climate events gross photosynthesis net production resilience |
| title | The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanica |
| title_full | The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanica |
| title_fullStr | The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanica |
| title_full_unstemmed | The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanica |
| title_short | The ontogeny-specific thermal sensitivity of the seagrass Posidonia oceanica |
| title_sort | ontogeny specific thermal sensitivity of the seagrass posidonia oceanica |
| topic | dark respiration extreme climate events gross photosynthesis net production resilience |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1183728/full |
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