干旱区生态环境知识资源中心(Arid): Non-consumptive predator effects on prey population size: A dearth of evidence

Arid

DOI	10.1111/1365-2656.13213
	Non-consumptive predator effects on prey population size: A dearth of evidence
	Sheriff, Michael J.1; Peacor, Scott D.2; Hawlena, Dror 3; Thaker, Maria 4
通讯作者	Sheriff, Michael J.
来源期刊	JOURNAL OF ANIMAL ECOLOGY
ISSN	0021-8790
EISSN	1365-2656
出版年	2020
卷号	89 期号:6 页码:1302-1316
英文摘要	There is a large and growing interest in non-consumptive effects (NCEs) of predators. Diverse and extensive evidence shows that predation risk directly influences prey traits, such as behaviour, morphology and physiology, which in turn, may cause a reduction in prey fitness components (i.e. growth rate, survival and reproduction). An intuitive expectation is that NCEs that reduce prey fitness will extend to alter population growth rate and therefore population size. However, our intensive literature search yielded only 10 studies that examined how predator-induced changes in prey traits translate to changes in prey population size. Further, the scant evidence for risk-induced changes on prey population size have been generated from studies that were performed in very controlled systems (mesocosm and laboratory), which do not have the complexity and feedbacks of natural settings. Thus, although likely that predation risk alone can alter prey population size, there is little direct empirical evidence that demonstrates that it does. There are also clear reasons that risk effects on population size may be much smaller than the responses on phenotype and fitness components that are typically measured, magnifying the need to show, rather than infer, effects on population size. Herein we break down the process of how predation risk influences prey population size into a chain of events (predation risk affects prey traits, which affect prey fitness components and population growth rate, which affect prey population size), and highlight the complexity of each transition. We illustrate how the outcomes of these transitions are not straightforward, and how environmental context strongly dictates the direction and magnitude of effects. Indeed, the high variance in prey responses is reflected in the variance of results reported in the few studies that have empirically quantified risk effects on population size. It is therefore a major challenge to predict population effects given the complexity of how environmental context interacts with predation risk and prey responses. We highlight the critical need to appreciate risk effects at each level in the chain of events, and that changes at one level cannot be assumed to translate into changes in the next because of the interplay between risk, prey responses, and the environment. The gaps in knowledge we illuminate underscore the need for more evidence to substantiate the claim that predation risk effects extend to prey population size. The lacunae we identify should inspire future studies on the impact of predation risk on population-level responses in free-living animals.
英文关键词	anti-predator response fear effects indirect effects non-lethal effects phenotypic plasticity predation risk predator-prey interactions trait-mediated effects
类型	Review
语种	英语
国家	USA ; Israel ; India
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000527071600001
WOS关键词	MEDIATED INDIRECT INTERACTIONS ; LIFE-HISTORY EVOLUTION ; TRADE-OFF ; PHENOTYPIC PLASTICITY ; INDUCIBLE DEFENSES ; HABITAT SELECTION ; FORAGING BEHAVIOR ; DESERT LIZARDS ; RISK ; GROWTH
WOS类目	Ecology ; Zoology
WOS研究方向	Environmental Sciences & Ecology ; Zoology
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314856
作者单位	1.Univ Massachusetts, Biol Dept, Dartmouth, MA 02747 USA; 2.Michigan State Univ, Dept Fisheries & Wildlife, E Lansing, MI 48824 USA; 3.Hebrew Univ Jerusalem, Alexander Silberman Inst Life Sci, Dept Ecol Evolut & Behav, Risk Management Ecol Lab, Jerusalem, Israel; 4.Indian Inst Sci, Ctr Ecol Sci, Bangalore, Karnataka, India
推荐引用方式 GB/T 7714	Sheriff, Michael J.,Peacor, Scott D.,Hawlena, Dror,et al. Non-consumptive predator effects on prey population size: A dearth of evidence[J]. Hebrew University of Jerusalem,2020,89(6):1302-1316.
APA	Sheriff, Michael J.,Peacor, Scott D.,Hawlena, Dror,&Thaker, Maria.(2020).Non-consumptive predator effects on prey population size: A dearth of evidence.JOURNAL OF ANIMAL ECOLOGY,89(6),1302-1316.
MLA	Sheriff, Michael J.,et al."Non-consumptive predator effects on prey population size: A dearth of evidence".JOURNAL OF ANIMAL ECOLOGY 89.6(2020):1302-1316.