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| DOI | 10.1371/journal.pbio.3002443 |
| Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences | |
| 发表日期 | 2024 |
| ISSN | 1544-9173 |
| EISSN | 1545-7885 |
| 起始页码 | 22 |
| 结束页码 | 1 |
| 卷号 | 22期号:1 |
| 英文摘要 | The minimum O2 needed to fuel the demand of aquatic animals is commonly observed to increase with temperature, driven by accelerating metabolism. However, recent measurements of critical O2 thresholds (Pcrit) reveal more complex patterns, including those with a minimum at an intermediate thermal optimum. To discern the prevalence, physiological drivers, and biogeographic manifestations of such curves, we analyze new experimental and biogeographic data using a general dynamic model of aquatic water breathers. The model simulates the transfer of oxygen from ambient water through a boundary layer and into animal tissues driven by temperature-dependent rates of metabolism, diffusive gas exchange, and ventilatory and circulatory systems with O2-protein binding. We find that a thermal optimum in Pcrit can arise even when all physiological rates increase steadily with temperature. This occurs when O2 supply at low temperatures is limited by a process that is more temperature sensitive than metabolism, but becomes limited by a less sensitive process at warmer temperatures. Analysis of published species respiratory traits suggests that this scenario is not uncommon in marine biota, with ventilation and circulation limiting supply under cold conditions and diffusion limiting supply at high temperatures. Using occurrence data, we show that species with these physiological traits inhabit lowest O2 waters near the optimal temperature for hypoxia tolerance and are restricted to higher O2 at temperatures above and below this optimum. Our results imply that hypoxia tolerance can decline under both cold and warm conditions and thus may influence both poleward and equatorward species range limits. The minimum oxygen level needed to fuel the demand of aquatic animals is commonly observed to increase with temperature, driven by accelerating metabolism. However, this study uses species measurements and a dynamical model to reveal how oxygen supply can reduce hypoxia tolerance and limit biogeographic ranges of marine ectotherms under both cold and warm conditions. |
| 语种 | 英语 |
| WOS研究方向 | Biochemistry & Molecular Biology ; Life Sciences & Biomedicine - Other Topics |
| WOS类目 | Biochemistry & Molecular Biology ; Biology |
| WOS记录号 | WOS:001148173800002 |
| 来源期刊 | PLOS BIOLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/302807 |
| 作者单位 | University of Washington; University of Washington Seattle; University of Cologne; Princeton University; University of California System; University of California Santa Cruz; National Oceanic Atmospheric Admin (NOAA) - USA; Stanford University; Princeton University |
| 推荐引用方式 GB/T 7714 | . Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences[J],2024,22(1). |
| APA | (2024).Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences.PLOS BIOLOGY,22(1). |
| MLA | "Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences".PLOS BIOLOGY 22.1(2024). |
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