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PLoS One

Title:		Cross-attraction between an exotic and a native pine bark beetle: a novel invasion mechanism?
Author(s):		Lu M; Miller DR; Sun JH;
Address:		"State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China"
Journal Title:		PLoS One
Year:		2007
Volume:		20071212
Issue:		12
Page Number:		e1302 -
DOI:		10.1371/journal.pone.0001302
ISSN/ISBN:		1932-6203 (Electronic) 1932-6203 (Linking)
Abstract:		"BACKGROUND: Aside from the ecological impacts, invasive species fascinate ecologists because of the unique opportunities that invasives offer in the study of community ecology. Some hypotheses have been proposed to illustrate the mechanisms that allow exotics to become invasive. However, positive interactions between exotic and native insects are rarely utilized to explain invasiveness of pests. METHODOLOGY/PRINCIPAL FINDINGS: Here, we present information on a recently formed association between a native and an exotic bark beetle on their shared host, Pinus tabuliformis, in China. In field examinations, we found that 35-40% of P. tabuliformis attacked by an exotic bark beetle, Dendroctonus valens, were also attacked by a native pine bark beetle, Hylastes parallelus. In the laboratory, we found that the antennal and walking responses of H. parallelus to host- and beetle-produced compounds were similar to those of the exotic D. valens in China. In addition, D. valens was attracted to volatiles produced by the native H. parallelus. CONCLUSIONS/SIGNIFICANCE: We report, for the first time, facilitation between an exotic and a native bark beetle seems to involve overlap in the use of host attractants and pheromones, which is cross-attraction. The concept of this interspecific facilitation could be explored as a novel invasive mechanism which helps explain invasiveness of not only exotic bark beetles but also other introduced pests in principle. The results reported here also have particularly important implications for risk assessments and management strategies for invasive species"
Keywords:		Animals Coleoptera/*physiology Female Male Pheromones/physiology Species Specificity Volatilization;
Notes:		"MedlineLu, Min Miller, Daniel R Sun, Jiang-Hua eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2007/12/13 PLoS One. 2007 Dec 12; 2(12):e1302. doi: 10.1371/journal.pone.0001302"