气候变化领域集成服务门户(CCPortal): The importance of the timescale of the fitness metric for estimates of selection on phenotypic traits during a period of demographic change

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DOI	10.1111/ele.12619
	The importance of the timescale of the fitness metric for estimates of selection on phenotypic traits during a period of demographic change
	Scranton K.; Lummaa V.; Stearns S.C.
发表日期	2016
ISSN	1461-023X
EISSN	1461-0248
卷号	19 期号:8
英文摘要	Although fitness is central to the evolutionary process, metrics vary by timescale. Different timescales may give rise to different estimates of selection, especially during demographic transitions caused by rapid environmental and socioeconomic change. In this study, we used a dataset of a human population in Finland from 1775 to 1950 to compare two fitness metrics and their estimates of selection pressures, before and during a demographic transition. Both metrics, lifetime reproductive success and an annual metric of individual performance, declined while selection on the ages at first and last reproduction remained nearly constant, favouring individuals with wider reproductive windows. The ability to partition the annual metric into contributions from reproduction and survival revealed the short-term effects of a famine and the reversal of selection pressure via the survival component of annual fitness. Although the metrics generally agreed, the annual metric detected the effects of environmental variation and demographic change occurring within a generation. © 2016 John Wiley & Sons Ltd/CNRS.
英文关键词	Demographic change; Fitness; Fitness timescale; Life-history traits; Phenotypic selection
学科领域	birth rate; Finland; genetic selection; genetics; human; population dynamics; reproductive fitness; time factor; Birth Rate; Finland; Genetic Fitness; Humans; Population Dynamics; Selection, Genetic; Time Factors
语种	英语
scopus关键词	birth rate; Finland; genetic selection; genetics; human; population dynamics; reproductive fitness; time factor; Birth Rate; Finland; Genetic Fitness; Humans; Population Dynamics; Selection, Genetic; Time Factors
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118525
作者单位	Department of Ecology and Evolutionary Biology, Yale University, 165 Prospect Street CT, New Haven, CT 06520-8102, United States; Department of Biology, University of Turku, Turku, FI-20014, Finland
推荐引用方式 GB/T 7714	Scranton K.,Lummaa V.,Stearns S.C.. The importance of the timescale of the fitness metric for estimates of selection on phenotypic traits during a period of demographic change[J],2016,19(8).
APA	Scranton K.,Lummaa V.,&Stearns S.C..(2016).The importance of the timescale of the fitness metric for estimates of selection on phenotypic traits during a period of demographic change.Ecology Letters,19(8).
MLA	Scranton K.,et al."The importance of the timescale of the fitness metric for estimates of selection on phenotypic traits during a period of demographic change".Ecology Letters 19.8(2016).