DOI: 10.1111/ele.12938
Scopus记录号: 2-s2.0-85044379453
论文题名: Predictive power of food web models based on body size decreases with trophic complexity
作者: Jonsson T. ; Kaartinen R. ; Jonsson M. ; Bommarco R.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2018
卷: 21, 期: 5 起始页码: 702
结束页码: 712
语种: 英语
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
Scopus关键词: Hexapoda
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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107453
Appears in Collections: 气候减缓与适应
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作者单位: Department of Ecology, Swedish University of Agricultural Sciences, Box 7044, Uppsala, Sweden; Ecological Modelling group, School of Bioscience, University of Skövde, Box 408, Skövde, Sweden
Recommended Citation:
Jonsson T.,Kaartinen R.,Jonsson M.,et al. Predictive power of food web models based on body size decreases with trophic complexity[J]. Ecology Letters,2018-01-01,21(5)