气候变化领域集成服务门户(CCPortal): Predictive power of food web models based on body size decreases with trophic complexity

CCPortal

DOI	10.1111/ele.12938
	Predictive power of food web models based on body size decreases with trophic complexity
	Jonsson T.; Kaartinen R.; Jonsson M.; Bommarco R.
发表日期	2018
ISSN	1461023X
卷号	21 期号:5
英文摘要	Food web models parameterised using body size show promise to predict trophic interaction strengths (IS) and abundance dynamics. However, this remains to be rigorously tested in food webs beyond simple trophic modules, where indirect and intraguild interactions could be important and driven by traits other than body size. We systematically varied predator body size, guild composition and richness in microcosm insect webs and compared experimental outcomes with predictions of IS from models with allometrically scaled parameters. Body size was a strong predictor of IS in simple modules (r2 = 0.92), but with increasing complexity the predictive power decreased, with model IS being consistently overestimated. We quantify the strength of observed trophic interaction modifications, partition this into density-mediated vs. behaviour-mediated indirect effects and show that model shortcomings in predicting IS is related to the size of behaviour-mediated effects. Our findings encourage development of dynamical food web models explicitly including and exploring indirect mechanisms. © 2018 John Wiley & Sons Ltd/CNRS
英文关键词	Allometric trophic network model; body size ratio; indirect effects; indirect interactions; interaction strength; non-consumptive effect; predator–prey interaction; species’ traits; trophic interaction modification
语种	英语
scopus关键词	Hexapoda; animal; body size; food chain; insect; nutritional status; predation; Animals; Body Size; Food Chain; Insecta; Nutritional Status; 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/121322
作者单位	Department of Ecology, Swedish University of Agricultural Sciences, Box 7044, Uppsala, SE-75007, Sweden; Ecological Modelling group, School of Bioscience, University of Skövde, Box 408, Skövde, SE-54128, Sweden
推荐引用方式 GB/T 7714	Jonsson T.,Kaartinen R.,Jonsson M.,et al. Predictive power of food web models based on body size decreases with trophic complexity[J],2018,21(5).
APA	Jonsson T.,Kaartinen R.,Jonsson M.,&Bommarco R..(2018).Predictive power of food web models based on body size decreases with trophic complexity.Ecology Letters,21(5).
MLA	Jonsson T.,et al."Predictive power of food web models based on body size decreases with trophic complexity".Ecology Letters 21.5(2018).