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Psyche
Volume 2012 (2012), Article ID 215891, 5 pages
http://dx.doi.org/10.1155/2012/215891
Research Article

Vertically Stratified Ash-Limb Beetle Fauna in Northern Ohio

1Department of Entomology, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, OH 44691, USA
2Southern Research Station, USDA Forest Service, Starkville, MS 39759, USA
3Department of Genetics, North Carolina State University, Raleigh, NC 27695, USA
4Georgia Museum of Natural History, University of Georgia, Athens, GA 30602, USA

Received 29 May 2012; Accepted 9 June 2012

Academic Editor: Martin H. Villet

Copyright © 2012 Michael D. Ulyshen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To better understand the diversity and ecology of indigenous arthropods at risk from the invasive emerald ash borer (Agrilus planipennis Fairmaire) in North American forests, saproxylic beetles (Insecta: Coleoptera) were reared from ash (Fraxinus sp.) limbs suspended in the canopy, ~10–17 m above the ground, and from those placed on the ground in a mature mixed hardwood forest. In total, 209 specimens from 9 families and 18 species were collected from 30.0 m2 of limbs. The generalist cerambycid Neoclytus acuminatus (Fabricius) was the most commonly captured taxon, followed by an assemblage of four exotic ambrosia beetles dominated by Xylosandrus crassiusculus (Motschulsky). Two species largely or entirely restricted to ash, the buprestid Agrilus subcinctus Gory and the curculionid Hylesinus aculeatus (Say), were collected as well. Although there were no differences in beetle richness, abundance, or density between limb positions, community composition differed significantly. This can be largely attributed to phloem and wood-feeding species (i.e., Cerambycidae and Buprestidae) being more common in the suspended limbs and ambrosia beetles being more numerous on the forest floor. Possible explanations for these patterns are discussed.