Effects of trap height on captures of arboreal insects in pine stands of northeastern United States of America. Issue 1 (17th October 2013)

• Record Type: Journal Article
• Authors: Dodds, Kevin J.
• Is Part Of: Canadian entomologist. Volume 146:Issue 1(2014)
• Page Start: 80
• Page End: 89
• Publication Date: 2013-10-17
• Subjects: Entomology -- Periodicals; Insects -- Periodicals; 595.705
• DOI: 10.4039/tce.2013.57
• Languages: English
• ISSNs: 0008-347X

Abstract

<abstract abstract-type="normal"> <title>Abstract</title> <p>Knowledge of the effects of variables that can influence trapping results should help to optimise efforts in exotic species detection and other surveys. Two vertical trap placements (understorey, canopy) were tested to determine influence of these two heights on captures of Scolytinae (Coleoptera: Curculionidae), Cerambycidae (Coleoptera), and Siricidae (Hymenoptera) using semiochemical-baited multiple-funnel traps. Traps were baited with α-pinene, ethanol, ipsdienol, and ipsenol. A total of 8463 insects from 65 species and one genus were captured during the study. Average species richness, species diversity, abundance, number of unique species, and expected diversity were higher in understorey compared with canopy traps. Jaccard (0.94 ± 0.05) and Sørensen abundance (0.97 ± 0.03) similarity indices suggested highly similar communities sampled at the two trap heights. <italic>Dendroctonus valens</italic> LeConte, <italic>Dryocoetes autographus</italic> Ratzeburg, <italic>Hylastes opacus</italic> Erichson, <italic>Orthotomicus caelatus</italic> (Eichhoff), <italic>Gnathotrichus materiarius</italic> (Fitch), <italic>Asemum striatum</italic> (Linnaeus), <italic>Monochamus scutellatus scutellatus</italic> (Say), <italic>Rhagium inquisitor</italic> (Linnaeus), and <italic>Xylotrechus sagitattus sagitattus</italic> (Germar) were more abundant in understorey traps. In contrast, <italic>Ips pini</italic> (Say), <italic>Pityogenes hopkinsi</italic> Swaine, <italic>Monochamus carolinensis</italic> (Olivier), <italic>Acmaeops proteus</italic> (Kirby), and <italic>Astylopsis sexgutatta</italic> (Say) were more abundant in canopy traps. The common practice of trapping in the understorey may be optimal for sampling arboreal insects as part of survey efforts. However, additional species may be found by trapping at other vertical placements.</p> </abstract>