气候变化领域集成服务门户(CCPortal): Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms

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DOI	10.1073/pnas.2003292117
	Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms
	Rubalcaba J.G.; Verberk W.C.E.P.; Jan Hendriks A.; Saris B.; Arthur Woods H.
发表日期	2020
ISSN	0027-8424
起始页码	31963
结束页码	31968
卷号	117 期号:50
英文摘要	Both oxygen and temperature are fundamental factors determining metabolic performance, fitness, ecological niches, and responses of many aquatic organisms to climate change. Despite the importance of physical and physiological constraints on oxygen supply affecting aerobic metabolism of aquatic ectotherms, ecological theories such as the metabolic theory of ecology have focused on the effects of temperature rather than oxygen. This gap currently impedes mechanistic models from accurately predicting metabolic rates (i.e., oxygen consumption rates) of aquatic organisms and restricts predictions to resting metabolism, which is less affected by oxygen limitation. Here, we expand on models of metabolic scaling by accounting for the role of oxygen availability and temperature on both resting and active metabolic rates. Our model predicts that oxygen limitation is more likely to constrain metabolism in larger, warmer, and active fish. Consequently, active metabolic rates are less responsive to temperature than are resting metabolic rates, and metabolism scales to body size with a smaller exponent whenever temperatures or activity levels are higher. Results from a metaanalysis of fish metabolic rates are consistent with our model predictions. The observed interactive effects of temperature, oxygen availability, and body size predict that global warming will limit the aerobic scope of aquatic ectotherms and may place a greater metabolic burden on larger individuals, impairing their physiological performance in the future. Our model reconciles the metabolic theory with empirical observations of oxygen limitation and provides a formal, quantitative framework for predicting both resting and active metabolic rate and hence aerobic scope of aquatic ectotherms. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Aerobic scope; Biophysical modeling; Fish; Metabolic scaling; Teleost
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160191
作者单位	Rubalcaba, J.G., Division of Biological Sciences, University of Montana, Missoula, MT 59812, United States, Department of Biology, McGill University, Montreal, QC H3A 1B1, Canada; Verberk, W.C.E.P., Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, 6500 GL, Netherlands; Jan Hendriks, A., Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, 6500 GL, Netherlands; Saris, B., Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Nijmegen, 6500 GL, Netherlands; Arthur Woods, H., Division of Biological Sciences, University of Montana, Missoula, MT 59812, United States
推荐引用方式 GB/T 7714	Rubalcaba J.G.,Verberk W.C.E.P.,Jan Hendriks A.,et al. Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms[J],2020,117(50).
APA	Rubalcaba J.G.,Verberk W.C.E.P.,Jan Hendriks A.,Saris B.,&Arthur Woods H..(2020).Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms.Proceedings of the National Academy of Sciences of the United States of America,117(50).
MLA	Rubalcaba J.G.,et al."Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms".Proceedings of the National Academy of Sciences of the United States of America 117.50(2020).