气候变化领域集成服务门户(CCPortal): Individual variation in heat tolerance and metabolism in marine Antarctic organisms

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DOI	10.1016/j.rsma.2024.103467
	Individual variation in heat tolerance and metabolism in marine Antarctic organisms
	Varas, Oscar; Molina, Andres N.; Garcia-Huidobro, M. Roberto; Aldana, Marcela; Rezende, Enrico L.; Carter, Mauricio J.; Galban-Malagon, Cristobal; Pulgar, Jose M.
发表日期	2024
ISSN	2352-4855
起始页码	73
卷号	73
英文摘要	Climate 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.
英文关键词	Antarctica; Thermal sensitivity; Heat tolerance; Thermal -death time curves; CTmax
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Ecology ; Marine & Freshwater Biology
WOS记录号	WOS:001222145000001
来源期刊	REGIONAL STUDIES IN MARINE SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300881
作者单位	Universidad Andres Bello; Pontificia Universidad Catolica de Chile; Universidad Santo Tomas; Universidad Santo Tomas; Universidad Mayor; State University System of Florida; Florida International University
推荐引用方式 GB/T 7714	Varas, Oscar,Molina, Andres N.,Garcia-Huidobro, M. Roberto,et al. Individual variation in heat tolerance and metabolism in marine Antarctic organisms[J],2024,73.
APA	Varas, Oscar.,Molina, Andres N..,Garcia-Huidobro, M. Roberto.,Aldana, Marcela.,Rezende, Enrico L..,...&Pulgar, Jose M..(2024).Individual variation in heat tolerance and metabolism in marine Antarctic organisms.REGIONAL STUDIES IN MARINE SCIENCE,73.
MLA	Varas, Oscar,et al."Individual variation in heat tolerance and metabolism in marine Antarctic organisms".REGIONAL STUDIES IN MARINE SCIENCE 73(2024).