气候变化领域集成服务门户(CCPortal): Simple signals indicate which period of the annual cycle drives declines in seasonal populations

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DOI	10.1111/ele.13393
	Simple signals indicate which period of the annual cycle drives declines in seasonal populations
	Burant J.B.; Betini G.S.; Norris D.R.
发表日期	2019
ISSN	1461023X
卷号	22 期号:12
英文摘要	For declining wild populations, a critical aspect of effective conservation is understanding when and where the causes of decline occur. The primary drivers of decline in migratory and seasonal populations can often be attributed to a specific period of the year. However, generic, broadly applicable indicators of these season-specific drivers of population decline remain elusive. We used a multi-generation experiment to investigate whether habitat loss in either the breeding or non-breeding period generated distinct signatures of population decline. When breeding habitat was reduced, population size remained relatively stable for several generations, before declining precipitously. When non-breeding habitat was reduced, between-season variation in population counts increased relative to control populations, and non-breeding population size declined steadily. Changes in seasonal vital rates and other indicators were predicted by the season in which habitat loss treatment occurred. Per capita reproductive output increased when non-breeding habitat was reduced and decreased with breeding habitat reduction, whereas per capita non-breeding survival showed the opposite trends. Our results reveal how simple signals inherent in counts and demographics of declining populations can indicate which period of the annual cycle is driving declines. © 2019 John Wiley & Sons Ltd/CNRS
英文关键词	Annual cycle; breeding; conservation; habitat loss; non-breeding; population dynamics; seasonality
语种	英语
scopus关键词	animal; ecosystem; population density; population dynamics; population migration; season; Animal Migration; Animals; Ecosystem; Population Density; Population Dynamics; Seasons
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/120993
作者单位	Department of Integrative Biology, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; Nature Conservancy of Canada, 245 Eglinton Avenue East – Suite 410, Toronto, ON M4P 3J1, Canada
推荐引用方式 GB/T 7714	Burant J.B.,Betini G.S.,Norris D.R.. Simple signals indicate which period of the annual cycle drives declines in seasonal populations[J],2019,22(12).
APA	Burant J.B.,Betini G.S.,&Norris D.R..(2019).Simple signals indicate which period of the annual cycle drives declines in seasonal populations.Ecology Letters,22(12).
MLA	Burant J.B.,et al."Simple signals indicate which period of the annual cycle drives declines in seasonal populations".Ecology Letters 22.12(2019).