Upper thermal limits and risk of mortality of coastal Antarctic ectotherms
Antarctic marine animals face one of the most extreme thermal environments, characterized by a stable and narrow range of low seawater temperatures. At the same time, the Antarctic marine ecosystems are threatened by accelerated global warming. Determining the upper thermal limits ( CT max ) is cruc...
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Online Access: | http://dx.doi.org/10.3389/fmars.2022.1108330 https://www.frontiersin.org/articles/10.3389/fmars.2022.1108330/full |
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crfrontiers:10.3389/fmars.2022.1108330 2024-06-23T07:47:32+00:00 Upper thermal limits and risk of mortality of coastal Antarctic ectotherms Carter, Mauricio J. García-Huidobro, M. Roberto Aldana, Marcela Rezende, Enrico L. Bozinovic, Francisco Galbán-Malagón, Cristóbal Pulgar, José M. Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica Institut chilien de l'Antarctique Agencia Nacional de Investigación y Desarrollo 2023 http://dx.doi.org/10.3389/fmars.2022.1108330 https://www.frontiersin.org/articles/10.3389/fmars.2022.1108330/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 9 ISSN 2296-7745 journal-article 2023 crfrontiers https://doi.org/10.3389/fmars.2022.1108330 2024-06-11T04:09:36Z Antarctic marine animals face one of the most extreme thermal environments, characterized by a stable and narrow range of low seawater temperatures. At the same time, the Antarctic marine ecosystems are threatened by accelerated global warming. Determining the upper thermal limits ( CT max ) is crucial to project the persistence and distribution areas of the Antarctic marine species. Using thermal death time curves (TDT), we estimated CT max at different temporal scales from 1 minute to daily and seasonal, the predict vulnerability to the current thermal variation and two potential heatwave scenarios. Our results revealed that CT max at 1 min are far from the temperature present in the marine intertidal area where our study species, showing Echinoderm species higher CT max than the Chordata and Arthropods species. Simulations indicated that seasonal thermal variation from the intertidal zone contributed to basal mortality, which increased after considering moderate scenarios of heatwaves (+2°C) in the Shetland Archipelago intertidal zone. Our finding highlighted the relevance of including exposure time explicitly on the CT max estimates, which deliver closer and more realistic parameters according to the species that may be experiencing in the field. Article in Journal/Newspaper Antarc* Antarctic Frontiers (Publisher) Antarctic The Antarctic Frontiers in Marine Science 9 |
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description |
Antarctic marine animals face one of the most extreme thermal environments, characterized by a stable and narrow range of low seawater temperatures. At the same time, the Antarctic marine ecosystems are threatened by accelerated global warming. Determining the upper thermal limits ( CT max ) is crucial to project the persistence and distribution areas of the Antarctic marine species. Using thermal death time curves (TDT), we estimated CT max at different temporal scales from 1 minute to daily and seasonal, the predict vulnerability to the current thermal variation and two potential heatwave scenarios. Our results revealed that CT max at 1 min are far from the temperature present in the marine intertidal area where our study species, showing Echinoderm species higher CT max than the Chordata and Arthropods species. Simulations indicated that seasonal thermal variation from the intertidal zone contributed to basal mortality, which increased after considering moderate scenarios of heatwaves (+2°C) in the Shetland Archipelago intertidal zone. Our finding highlighted the relevance of including exposure time explicitly on the CT max estimates, which deliver closer and more realistic parameters according to the species that may be experiencing in the field. |
author2 |
Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica Institut chilien de l'Antarctique Agencia Nacional de Investigación y Desarrollo |
format |
Article in Journal/Newspaper |
author |
Carter, Mauricio J. García-Huidobro, M. Roberto Aldana, Marcela Rezende, Enrico L. Bozinovic, Francisco Galbán-Malagón, Cristóbal Pulgar, José M. |
spellingShingle |
Carter, Mauricio J. García-Huidobro, M. Roberto Aldana, Marcela Rezende, Enrico L. Bozinovic, Francisco Galbán-Malagón, Cristóbal Pulgar, José M. Upper thermal limits and risk of mortality of coastal Antarctic ectotherms |
author_facet |
Carter, Mauricio J. García-Huidobro, M. Roberto Aldana, Marcela Rezende, Enrico L. Bozinovic, Francisco Galbán-Malagón, Cristóbal Pulgar, José M. |
author_sort |
Carter, Mauricio J. |
title |
Upper thermal limits and risk of mortality of coastal Antarctic ectotherms |
title_short |
Upper thermal limits and risk of mortality of coastal Antarctic ectotherms |
title_full |
Upper thermal limits and risk of mortality of coastal Antarctic ectotherms |
title_fullStr |
Upper thermal limits and risk of mortality of coastal Antarctic ectotherms |
title_full_unstemmed |
Upper thermal limits and risk of mortality of coastal Antarctic ectotherms |
title_sort |
upper thermal limits and risk of mortality of coastal antarctic ectotherms |
publisher |
Frontiers Media SA |
publishDate |
2023 |
url |
http://dx.doi.org/10.3389/fmars.2022.1108330 https://www.frontiersin.org/articles/10.3389/fmars.2022.1108330/full |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Frontiers in Marine Science volume 9 ISSN 2296-7745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2022.1108330 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
_version_ |
1802651652811915264 |