干旱区生态环境知识资源中心(Arid): Analyzing Time-Energy Constraints to Understand the Links between Environmental Change and Local Extinctions in Terrestrial Ectotherms

Arid

DOI	10.1086/716725
	Analyzing Time-Energy Constraints to Understand the Links between Environmental Change and Local Extinctions in Terrestrial Ectotherms
	Brewster, Casey L.; Gifford, Matthew; Ortega, Jason; Beaupre, Steven J.
通讯作者	Brewster, CL (corresponding author), Univ Arkansas, Dept Biol Sci, Fayetteville, AR 72701 USA.
来源期刊	AMERICAN NATURALIST
ISSN	0003-0147
EISSN	1537-5323
出版年	2021-12
英文摘要	Accelerated extinction rates have prompted an increased focus on the interplay between environmental change and species response. The effects of environmental change on thermal opportunity are typically considered through a climate change context. However, habitat alteration can also have strong effects on the thermal environment. Additionally, habitat alteration is considered a leading factor of species extinction, yet few studies address the influence of habitat alteration on thermal opportunity and time-energy budgets in at-risk species. Here, we show the strong effects that habitat degradation can have on thermal opportunity, time-energy budgets, and life history demographics of local populations. In the Ozark Mountains of northern Arkansas, woody vegetation encroachment has resulted in a shift in life history traits that appears to play an important role in recent extirpations of eastern collared lizards (Crotaphytus collaris). Populations in degraded habitats experienced a decline in thermal opportunity and less time at body temperatures (time at T-b) suitable for digestion compared with those in intact habitats. We used our data to model the effect of reduced time at T-b on the net assimilated energy available for growth and reproduction. Our model predicts an similar to 46% decline in the annual fecundity of individuals, which is similar to empirical observations of reproduction of C. collaris populations in degraded habitats (~49%). We conclude that C. collaris in degraded habitats experienced reduced growth and reproduction primarily as a result of constrained thermal opportunity leading to a decline in digestive processing rates. Our study applies an underappreciated approach to identify the biophysical and time-energy effects of habitat alteration.
英文关键词	thermal opportunity net assimilated energy time-energy constraints bioenergetic model mass-energy budgets conservation physiology
类型	Article ; Early Access
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000717382900001
WOS关键词	LIZARDS CROTAPHYTUS-COLLARIS ; DESERT LIZARD ; LIFE-HISTORY ; GROWTH-RATES ; PHYSIOLOGICAL ECOLOGY ; POPULATION-DYNAMICS ; THERMAL CONSTRAINTS ; CLIMATE-CHANGE ; BODY-MASS ; TEMPERATURE
WOS类目	Ecology ; Evolutionary Biology
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367740
作者单位	[Brewster, Casey L.; Ortega, Jason; Beaupre, Steven J.] Univ Arkansas, Dept Biol Sci, Fayetteville, AR 72701 USA; [Gifford, Matthew] Univ Cent Arkansas, Dept Biol, Conway, AR 72035 USA
推荐引用方式 GB/T 7714	Brewster, Casey L.,Gifford, Matthew,Ortega, Jason,et al. Analyzing Time-Energy Constraints to Understand the Links between Environmental Change and Local Extinctions in Terrestrial Ectotherms[J],2021.
APA	Brewster, Casey L.,Gifford, Matthew,Ortega, Jason,&Beaupre, Steven J..(2021).Analyzing Time-Energy Constraints to Understand the Links between Environmental Change and Local Extinctions in Terrestrial Ectotherms.AMERICAN NATURALIST.
MLA	Brewster, Casey L.,et al."Analyzing Time-Energy Constraints to Understand the Links between Environmental Change and Local Extinctions in Terrestrial Ectotherms".AMERICAN NATURALIST (2021).