气候变化领域集成服务门户(CCPortal): The two environmental drivers of thermoregulatory costs: Interactions between thermal mean and heterogeneity influence thermoregulation

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DOI	10.1111/1365-2435.14596
	The two environmental drivers of thermoregulatory costs: Interactions between thermal mean and heterogeneity influence thermoregulation
	Chan, Rachel L.; Hodgson, Mitchell; Schwanz, Lisa E.
发表日期	2024
ISSN	0269-8463
EISSN	1365-2435
英文摘要	Ectotherms often thermoregulate behaviourally within variable thermal environments in their attempts to acquire optimal body temperatures. Thermoregulation accrues benefits but incurs costs, which are crucial for understanding thermoregulatory behaviour. Costs of thermoregulating are influenced by two key attributes of the thermal environment-heterogeneity of thermal microhabitats and the deviation of the mean temperature from an animal's preferred temperature. However, empirical research has rarely distinguished between these two drivers of thermoregulatory costs or examined them concurrently. Our experiment used a novel thermoregulatory arena to examine the independent and interactive effects of the two environmental drivers of costs of thermoregulation on the thermoregulatory behaviour of a small ectotherm, the jacky dragon (Amphibolurus muricatus). Following previous theory, we predicted that (i) thermoregulation would be higher in environments with greater thermal heterogeneity (body temperatures closer to preferred temperatures, higher thermoregulatory accuracy and higher effectiveness of thermoregulation) and (ii) changes in thermoregulation as a function of mean environmental temperatures would differ depending on thermal heterogeneity. We found support for our prediction that these two environmental attributes had an interactive effect on thermoregulation but not for our prediction that thermal heterogeneity would impact thermoregulation independently. Individuals in highly heterogeneous environments maintained greater thermoregulatory accuracy compared with those in less heterogeneous environments as the mean environment increasingly deviated from the preferred temperature range. The results emphasise the crucial conceptual distinction between thermal mean and heterogeneity as drivers of thermoregulatory costs and how this distinction underpins variation in the thermal behaviour of ectotherms.Read the free Plain Language Summary for this article on the Journal blog. Read the free Plain Language Summary for this article on the Journal blog.image
英文关键词	basking behaviour; climate change; dragon lizard; ectotherm; thermal ecology
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:001230912500001
来源期刊	FUNCTIONAL ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299735
作者单位	University of New South Wales Sydney
推荐引用方式 GB/T 7714	Chan, Rachel L.,Hodgson, Mitchell,Schwanz, Lisa E.. The two environmental drivers of thermoregulatory costs: Interactions between thermal mean and heterogeneity influence thermoregulation[J],2024.
APA	Chan, Rachel L.,Hodgson, Mitchell,&Schwanz, Lisa E..(2024).The two environmental drivers of thermoregulatory costs: Interactions between thermal mean and heterogeneity influence thermoregulation.FUNCTIONAL ECOLOGY.
MLA	Chan, Rachel L.,et al."The two environmental drivers of thermoregulatory costs: Interactions between thermal mean and heterogeneity influence thermoregulation".FUNCTIONAL ECOLOGY (2024).