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DOI	10.1016/j.foreco.2018.11.044
	Droughts drive outbreak dynamics of an invasive forest insect on an exotic host
	Lantschner M.V.; Aukema B.H.; Corley J.C.
发表日期	2019
ISSN	0378-1127
起始页码	762
结束页码	770
卷号	433
英文摘要	Insect outbreaks are among the most important biotic disturbances in forest ecosystems and can exert immense economic and ecological impacts. Understanding the spatio-temporal patterns of eruptive insects can provide insights into the mechanisms driving their dynamics and help predict future responses under climate change. The aims of this study were to analyze the spatio-temporal patterns of outbreaks of the woodwasp Sirex noctilio –a major invasive pest of pines– in an invaded region of South America, to assess the relative importance of density-dependent and density-independent mechanisms on population dynamics, and to identify the primary factors that influence the magnitude of outbreaks. We used tree ring and insect sampling data of more than 1000 trees to reconstruct S. noctilio outbreaks in 29 pine stands across Patagonia-Argentina over a 16-year period. We found marked spatial synchrony in S. noctilio outbreaks at a regional scale. Rates of tree mortality from S. noctilio were influenced by both density-dependent and density-independent factors. The occurrence of S. noctilio outbreaks are triggered by an abrupt increase in drought, which likely increases the availability of susceptible host trees. The damage caused by the outbreaks is determined by stand level variables, closely related with tree stress. Rates of tree mortality decreased over time due to negative density-dependence in S. noctilio populations, likely due to the loss of suitable resources over time. Depicting mechanisms of large-scale tree mortality in ecosystems provides insights to the drivers of forest outbreaks and other factors such as responses to a changing climate. © 2018 Elsevier B.V.
英文关键词	Forest pest; Global change; Invasive species; Spatial synchrony; Spatio-temporal dynamics
语种	英语
scopus关键词	Climate change; Digital storage; Drought; Dynamics; Ecosystems; Population statistics; Forest pest; Global change; Invasive species; Spatial synchrony; Spatio-temporal dynamics; Forestry; biological invasion; coniferous tree; drought; forest ecosystem; global change; invasive species; mortality; pest outbreak; population outbreak; sampling; spatiotemporal analysis; synchrony; tree ring; wasp; Density; Drought; Dynamics; Ecosystems; Forestry; Insects; Mortality; Trees; Argentina; Patagonia; Hexapoda; Sirex noctilio
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156242
作者单位	Grupo de Ecología de Poblaciones de Insectos, Instituto de Investigaciones Forestales y Agropecuarias Bariloche, CONICET – INTA EEA Bariloche, Modesta Victoria 4450, Bariloche, 8400, Argentina; Department of Entomology, University of Minnesota, 1980 Folwell Avenue, St. Paul, MN, United States; Departamento de Ecología, CRUB Universidad Nacional del Comahue, Argentina
推荐引用方式 GB/T 7714	Lantschner M.V.,Aukema B.H.,Corley J.C.. Droughts drive outbreak dynamics of an invasive forest insect on an exotic host[J],2019,433.
APA	Lantschner M.V.,Aukema B.H.,&Corley J.C..(2019).Droughts drive outbreak dynamics of an invasive forest insect on an exotic host.Forest Ecology and Management,433.
MLA	Lantschner M.V.,et al."Droughts drive outbreak dynamics of an invasive forest insect on an exotic host".Forest Ecology and Management 433(2019).