气候变化领域集成服务门户(CCPortal): Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences

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DOI	10.1371/journal.pbio.3002443
	Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences
	Endress, Martin-Georg A.; Penn, Justin L.; Boag, Thomas H.; Burford, Benjamin P.; Sperling, Erik A.; Deutsch, Curtis A.
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/302808
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	Endress, Martin-Georg A.,Penn, Justin L.,Boag, Thomas H.,et al. Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences[J],2024,22(1).
APA	Endress, Martin-Georg A.,Penn, Justin L.,Boag, Thomas H.,Burford, Benjamin P.,Sperling, Erik A.,&Deutsch, Curtis A..(2024).Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences.PLOS BIOLOGY,22(1).
MLA	Endress, Martin-Georg A.,et al."Thermal optima in the hypoxia tolerance of marine ectotherms: Physiological causes and biogeographic consequences".PLOS BIOLOGY 22.1(2024).