气候变化领域集成服务门户(CCPortal): Habitat loss and alien tree invasion reduce defoliation intensity of an eruptive forest pest

CCPortal

DOI	10.1016/j.foreco.2018.11.028
	Habitat loss and alien tree invasion reduce defoliation intensity of an eruptive forest pest
	Cavaletto G.; Mazzon L.; Faccoli M.; Marini L.
发表日期	2019
ISSN	0378-1127
起始页码	497
结束页码	503
卷号	433
英文摘要	In forest ecosystems, bush-cricket species often occur at low density for very long periods until they suddenly outbreak with important economic and ecological consequences. In the last decades, isolated but severe outbreaks were reported across Europe for several species belonging to the genus Barbitistes. The aim of the study was to evaluate the role of local (i.e. stand composition) and landscape factors (forest area and composition in the landscape) on B. vicetinus populations during two outbreak years. We sampled frass quantity and defoliation intensity in 2014 and 2015 in 200 forest stands across north-east Italy where the forest landscapes have been fragmented and native forests have been heavily invaded by Robinia pseudoacacia, a North-American alien tree species. We found a strong negative effect of decreasing forest area on the frass quantity at relatively small spatial scale (250–500 m). The negative effect of forest habitat loss was likely related to the reduced ability to find resources across the landscape and possibly to higher pest mortality in the non-forest matrix due to multiple impacts such as agriculture management and road kill. The presence of R. pseudoacacia, a non-host alien tree species, at both the local and landscape scale further reduced the frass quantity indicating lower population density. We found a negative density-dependence in the population dynamics during the two outbreak years indicating that greater population density probably imposed a fitness cost to the offspring due to competition for food. Our results can help predicting spatial patterns of forest defoliation according to landscape structure and can improve the spread risk assessment and the design of potential control or containment strategies of an important forest pest. Any management intervention to contain this eruptive pest should consider the pervasive effects of landscape beside local processes. © 2018 Elsevier B.V.
英文关键词	Exotic species; Herbivore; Isolation; Landscape structure; Outbreak
语种	英语
scopus关键词	Ecosystems; Highway planning; Population distribution; Population dynamics; Population statistics; Risk assessment; Exotic species; Herbivore; Isolation; Landscape structures; Outbreak; Forestry; antiherbivore defense; cricket; density dependence; forest ecosystem; habitat loss; herbivore; introduced species; landscape; landscape structure; mortality; pest control; pest species; population density; population dynamics; potential biocontrol agent; risk assessment; Defoliation; Ecosystems; Forestry; Isolation; Low Density; Risk Assessment; Trees; Weight; Italy; Robinia pseudoacacia; Tettigoniidae
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/156263
作者单位	Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, Legnaro (PD), 35020, Italy
推荐引用方式 GB/T 7714	Cavaletto G.,Mazzon L.,Faccoli M.,et al. Habitat loss and alien tree invasion reduce defoliation intensity of an eruptive forest pest[J],2019,433.
APA	Cavaletto G.,Mazzon L.,Faccoli M.,&Marini L..(2019).Habitat loss and alien tree invasion reduce defoliation intensity of an eruptive forest pest.Forest Ecology and Management,433.
MLA	Cavaletto G.,et al."Habitat loss and alien tree invasion reduce defoliation intensity of an eruptive forest pest".Forest Ecology and Management 433(2019).