دورية أكاديمية
Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms.
| العنوان: | Oxygen limitation may affect the temperature and size dependence of metabolism in aquatic ectotherms. |
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| المؤلفون: | Rubalcaba JG; Division of Biological Sciences, University of Montana, Missoula, MT 59812; jg.rubalcaba@gmail.com.; Department of Biology, McGill University, Montreal, QC H3A 1B1, Canada., Verberk WCEP; Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University Nijmegen, 6500 GL Nijmegen, the Netherlands., Hendriks AJ; Department of Environmental Science, Institute for Water and Wetland Research, Radboud University Nijmegen, 6500 GL Nijmegen, the Netherlands., Saris B; Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University Nijmegen, 6500 GL Nijmegen, the Netherlands., Woods HA; Division of Biological Sciences, University of Montana, Missoula, MT 59812. |
| المصدر: | Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2020 Dec 15; Vol. 117 (50), pp. 31963-31968. Date of Electronic Publication: 2020 Nov 30. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Washington, DC : National Academy of Sciences |
| مواضيع طبية MeSH: | Global Warming* , Models, Biological*, Fishes/*physiology , Oxygen Consumption/*physiology , Water/*chemistry, Acclimatization/physiology ; Animals ; Body Size/physiology ; Energy Metabolism/physiology ; Fishes/anatomy & histology ; Hot Temperature/adverse effects ; Oxygen/analysis ; Oxygen/metabolism |
| مستخلص: | 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. Competing Interests: The authors declare no competing interest. (Copyright © 2020 the Author(s). Published by PNAS.) |
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| فهرسة مساهمة: | Keywords: aerobic scope; biophysical modeling; fish; metabolic scaling; teleost |
| المشرفين على المادة: | 059QF0KO0R (Water) S88TT14065 (Oxygen) |
| تواريخ الأحداث: | Date Created: 20201201 Date Completed: 20210201 Latest Revision: 20210201 |
| رمز التحديث: | 20221213 |
| مُعرف محوري في PubMed: | PMC7749359 |
| DOI: | 10.1073/pnas.2003292117 |
| PMID: | 33257544 |
| قاعدة البيانات: | MEDLINE |
| تدمد: | 1091-6490 |
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| DOI: | 10.1073/pnas.2003292117 |