Individual variation in heat tolerance and metabolism in marine Antarctic organisms

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dc.contributor.authorVaras, Oscar
dc.contributor.authorMolina, Andres N.
dc.contributor.authorGarcia-Huidobro, M. Roberto
dc.contributor.authorAldana, Marcela
dc.contributor.authorRezende, Enrico L.
dc.contributor.authorCarter, Mauricio J.
dc.contributor.authorGalban-Malagon, Cristobal
dc.contributor.authorPulgar, Jose M.
dc.date.accessioned2025-01-20T16:18:30Z
dc.date.available2025-01-20T16:18:30Z
dc.date.issued2024
dc.description.abstractClimate change is one of the main concerns to Antarctic biodiversity. Since temperature plays a crucial role in various biological traits, it is key to understand how warming may affect organisms specialized to live in the cold habitats. Although heat tolerance of several polar species is known, little emphasis has been given to individual variation and its relationship with other biological traits such as metabolic performance. In this study, we investigated the association between thermal sensitivity in metabolism (Q10) and heat tolerance (z) in six Antarctic marine organisms, including two fish species (Harpagifer antarcticus and Notothenia coriiceps), three crustaceans (Bovallia gigantea, Glyptonotus antarcticus, and Paraceradocus miersi), and one mollusk (Trophon nucelliformis). For this, we measured routine metabolic rates (RMR, mg O2/h) followed by heat tolerance measurements to reconstruct dose-response curves employing sublethal assays or thermal-collapse time (TCT) curves. Analyses reveal a negative relationship between the intercept and the slope of the temperature tolerance curves (CTmax and z values, respectively) against Q10, but only when T. nucelliformis was included in the generalized linear model. Therefore Q10 may be a good predictor of heat tolerance, but it is not true for chordate or arthropod species studied. Additionally, CTmax and z values exhibited a positive relationship consistent with previous studies. This study represents the first example of temperature tolerance curves quantified on an individual basis, and the analyses provide some evidence that thermal sensitivity in metabolism and heat tolerance are correlated. In future studies, it will be crucial to determine whether this relationship is robust and how it may impact the response of different lineages to accelerated warming.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.rsma.2024.103467
dc.identifier.issn2352-4855
dc.identifier.urihttps://doi.org/10.1016/j.rsma.2024.103467
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90650
dc.identifier.wosidWOS:001222145000001
dc.language.isoen
dc.revistaRegional studies in marine science
dc.rightsacceso restringido
dc.subjectAntarctica
dc.subjectThermal sensitivity
dc.subjectHeat tolerance
dc.subjectThermal -death time curves
dc.subjectCTmax
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleIndividual variation in heat tolerance and metabolism in marine Antarctic organisms
dc.typeartículo
dc.volumen73
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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