气候变化领域集成服务门户(CCPortal): Doubling of biomass production in European boreal forest trees by a four-year suppression of background insect herbivory

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DOI	10.1016/j.foreco.2020.117992
	Doubling of biomass production in European boreal forest trees by a four-year suppression of background insect herbivory
	Shestakov A.L.; Filippov B.Y.; Zubrii N.A.; Klemola T.; Zezin I.; Zverev V.; Zvereva E.L.; Kozlov M.V.
发表日期	2020
ISSN	0378-1127
卷号	462
英文摘要	Background insect herbivory, i.e. the minor but chronic plant damage caused by insects, is usually considered ‘negligible’ for plants when compared with the severe defoliation associated with forest pest outbreaks. We experimentally tested the hypothesis that the impacts of background herbivory on tree growth and mortality accumulate over years, resulting in much larger effects than usually assumed. In boreal taiga forests near Arkhangelsk (Northern Russia), application of insecticide at 10-day intervals for four growth seasons (June–September of 2014–2017) decreased foliage losses to insects in our study species (early successional deciduous Betula pubescens and Populus tremula; late successional coniferous Picea abies and Pinus sylvestris) from 2.04–6.35% to 0.72–1.18%. The magnitude of the insecticide treatment effect on plant losses to defoliating insects varied considerably among the study species, with the highest effect observed in white birch and the lowest effects in the two late successional species. Across all tree species, insecticide treatment nearly doubled the increase in tree biomass relative to control plots, demonstrating that background insect herbivory has major negative impacts on tree growth and productivity. The insecticide-treated plots showed the largest increase in biomass in Norway spruce and the smallest increase in European aspen when compared to the control plots. The changes in birch growth following the release from insect herbivory were three times greater than the effects of the same level of simulated herbivory in an earlier experiment, thereby hinting at the importance of herbivore-specific elicitors in the growth suppression of trees damaged by insects. The mortality of late successional species in the treatment plots increased nearly three-fold, whereas the mortality of early successional species did not change relative to controls, suggesting an increase in competitiveness of the early successional trees released from herbivory. Thus, in agreement with an earlier modelling study, we conclude that minor herbivore damage, over the long term, substantially reduces biomass production in North European forest trees. Due to differential effects on coexisting tree species, this damage has a pronounced impact on plant competitiveness and affects both the productivity and the structure of boreal forests. © 2020 The Authors
关键词	Biomass Competition Ecology Insecticides Plants (botany)Productivity Fine root density Forest structure Leaf area loss Mortality Saplings Tree growth Forestry boreal forest competitiveness coniferous tree deciduous forest defoliation fine root foliage herbivory mortality pesticide application plant-herbivore interaction seasonality succession Biomass Competition Ecology Insecticides Mortality Productivity Arkhangelsk [Russian Federation]Russian Federation Betula pendula Betula pubescens Hexapoda Picea abies Pinus sylvestris Populus tremula
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132906
推荐引用方式 GB/T 7714	Shestakov A.L.,Filippov B.Y.,Zubrii N.A.,et al. Doubling of biomass production in European boreal forest trees by a four-year suppression of background insect herbivory[J]. Forest Ecology and Management,2020,462.
APA	Shestakov A.L..,Filippov B.Y..,Zubrii N.A..,Klemola T..,Zezin I..,...&Kozlov M.V..(2020).Doubling of biomass production in European boreal forest trees by a four-year suppression of background insect herbivory.,462.
MLA	Shestakov A.L.,et al."Doubling of biomass production in European boreal forest trees by a four-year suppression of background insect herbivory".462(2020).