DOI: 10.1111/gcb.12441
论文题名: Increases in disturbance and reductions in habitat size interact to suppress predator body size
作者: Jellyman P.G. ; Mchugh P.A. ; Mcintosh A.R.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 5 起始页码: 1550
结束页码: 1558
语种: 英语
英文关键词: Body size
; Disturbance
; Food web
; Habitat size
; Predator
; Temperature
Scopus关键词: abundance
; body size
; climate change
; climate effect
; disturbance
; environmental factor
; habitat structure
; predator
; temperature effect
; Pisces
; anatomy and histology
; animal
; body size
; ecosystem
; environmental protection
; fish
; food chain
; New Zealand
; physiology
; predation
; temperature
; Animals
; Body Size
; Conservation of Natural Resources
; Ecosystem
; Fishes
; Food Chain
; New Zealand
; Predatory Behavior
; Temperature
英文摘要: Food webs are strongly size-structured so will be vulnerable to changes in environmental factors that affect large predators. However, mechanistic understanding of environmental controls of top predator size is poorly developed. We used streams to investigate how predator body size is altered by three fundamental climate change stressors: reductions in habitat size, increases in disturbance and warmer temperatures. Using new survey data from 74 streams, we showed that habitat size and disturbance were the most important stressors influencing predator body size. A synergistic interaction between that habitat size and disturbance due to flooding meant the sizes of predatory fishes peaked in large, benign habitats and their body size decreased as habitats became either smaller or harsher. These patterns were supported by experiments indicating that habitat-size reductions and increased flood disturbance decreased both the abundance and biomass of large predators. This research indicates that interacting climate change stressors can influence predator body size, resulting in smaller predators than would be predicted from examining an environmental factor in isolation. Thus, climate-induced changes to key interacting environmental factors are likely to have synergistic impacts on predator body size which, because of their influence on the strength of biological interactions, will have far-reaching effects on food-web responses to global environmental change. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62236
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand; National Institute of Water and Atmospheric Research, P.O. Box 8602, Christchurch, New Zealand; Washington Department of Fish and Wildlife, Olympia, WA, United States
Recommended Citation:
Jellyman P.G.,Mchugh P.A.,Mcintosh A.R.. Increases in disturbance and reductions in habitat size interact to suppress predator body size[J]. Global Change Biology,2014-01-01,20(5)