DOI: 10.1111/gcb.12842
论文题名: Experimental climate warming alters aspen and birch phytochemistry and performance traits for an outbreak insect herbivore
作者: Jamieson M.A. ; Schwartzberg E.G. ; Raffa K.F. ; Reich P.B. ; Lindroth R.L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 7 起始页码: 2698
结束页码: 2710
语种: 英语
英文关键词: Aspen (Populus tremuloides)
; Birch (Betula papyrifera)
; Climate change
; Forest tent caterpillar (Malacosoma disstria)
; Herbivore resistance
; Herbivory
; Plant defenses
; Plant-insect interactions
Scopus关键词: climate change
; environmental stress
; global warming
; herbivory
; mortality
; photochemistry
; plant defense
; plant-insect interaction
; tree
; warming
; Betula papyrifera
; Hexapoda
; Malacosoma disstria
; Populus tremuloides
英文摘要: Climate change and insect outbreaks are key factors contributing to regional and global patterns of increased tree mortality. While links between these environmental stressors have been established, our understanding of the mechanisms by which elevated temperature may affect tree-insect interactions is limited. Using a forest warming mesocosm, we investigated the influence of elevated temperature on phytochemistry, tree resistance traits, and insect performance. Specifically, we examined warming effects on forest tent caterpillar (Malacosoma disstria) and host trees aspen (Populus tremuloides) and birch (Betula papyrifera). Trees were grown under one of three temperature treatments (ambient, +1.7 °C, +3.4 °C) in a multiyear open-air warming experiment. In the third and fourth years of warming (2011, 2012), we assessed foliar nutrients and defense chemistry. Elevated temperatures altered foliar nitrogen, carbohydrates, lignin, and condensed tannins, with differences in responses between species and years. In 2012, we performed bioassays using a common environment approach to evaluate plant-mediated indirect warming effects on larval performance. Warming resulted in decreased food conversion efficiency and increased consumption, ultimately with minimal effect on larval development and biomass. These changes suggest that insects exhibited compensatory feeding due to reduced host quality. Within the context of observed phytochemical variation, primary metabolites were stronger predictors of insect performance than secondary metabolites. Between-year differences in phytochemical shifts corresponded with substantially different weather conditions during these two years. By sampling across years within an ecologically realistic and environmentally open setting, our study demonstrates that plant and insect responses to warming can be temporally variable and context dependent. Results indicate that elevated temperatures can alter phytochemistry, tree resistance traits, and herbivore feeding, but that annual weather variability may modulate warming effects leading to uncertain consequences for plant-insect interactions with projected climate change. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61927
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Entomology, University of Wisconsin-Madison, Madison, WI, United States; Adirondack Research, Saranac Lake, NY, United States; Department of Forest Resources, University of Minnesota, St. Paul, MN, United States; Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, NSW, Australia
Recommended Citation:
Jamieson M.A.,Schwartzberg E.G.,Raffa K.F.,et al. Experimental climate warming alters aspen and birch phytochemistry and performance traits for an outbreak insect herbivore[J]. Global Change Biology,2015-01-01,21(7)