气候变化领域集成服务门户(CCPortal): Predator personality structures prey communities and trophic cascades

CCPortal

DOI	10.1111/ele.12735
	Predator personality structures prey communities and trophic cascades
	Start D.; Gilbert B.
发表日期	2017
ISSN	1461-023X
EISSN	1461-0248
卷号	20 期号:3
英文摘要	Intraspecific variation is central to our understanding of evolution and population ecology, yet its consequences for community ecology are poorly understood. Animal personality – consistent individual differences in suites of behaviours – may be particularly important for trophic dynamics, where predator personality can determine activity rates and patterns of attack. We used mesocosms with aquatic food webs in which the top predator (dragonfly nymphs) varied in activity and subsequent attack rates on zooplankton, and tested the effects of predator personality. We found support for four hypotheses: (1) active predators disproportionately reduce the abundance of prey, (2) active predators select for predator-resistant prey species, (3) active predators strengthen trophic cascades (increase phytoplankton abundance) and (4) active predators are more likely to cannibalise one another, weakening all other trends when at high densities. These results suggest that intraspecific variation in predator personality is an important determinant of prey abundance, community composition and trophic cascades. © 2017 John Wiley & Sons Ltd/CNRS
英文关键词	Copepod; Daphnia; Epitheca canis; food web; intraspecific variation; predation competition
学科领域	Animalia; Anisoptera (dragonflies); Copepoda; Daphnia; Epitheca canis; animal; biota; copepod; Daphnia; food chain; growth, development and aging; larva; microalga; Odonata; Ontario; personality; physiology; phytoplankton; pond; population density; predation; Animals; Biota; Copepoda; Daphnia; Food Chain; Larva; Microalgae; Odonata; Ontario; Personality; Phytoplankton; Ponds; Population Density; Predatory Behavior
语种	英语
scopus关键词	Animalia; Anisoptera (dragonflies); Copepoda; Daphnia; Epitheca canis; animal; biota; copepod; Daphnia; food chain; growth, development and aging; larva; microalga; Odonata; Ontario; personality; physiology; phytoplankton; pond; population density; predation; Animals; Biota; Copepoda; Daphnia; Food Chain; Larva; Microalgae; Odonata; Ontario; Personality; Phytoplankton; Ponds; Population Density; Predatory Behavior
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/118417
作者单位	Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B3, Canada
推荐引用方式 GB/T 7714	Start D.,Gilbert B.. Predator personality structures prey communities and trophic cascades[J],2017,20(3).
APA	Start D.,&Gilbert B..(2017).Predator personality structures prey communities and trophic cascades.Ecology Letters,20(3).
MLA	Start D.,et al."Predator personality structures prey communities and trophic cascades".Ecology Letters 20.3(2017).