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Effect of spatial scale on habitat use of Bolitotherus cornutus (Coleoptera: Tenebrionidae)

Published online by Cambridge University Press:  02 April 2012

Sonja Teichert  and
Soren Bondrup-Nielsen
Sonja Teichert
Affiliation:
Centre for Wildlife and Conservation Biology, Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada B4P 2R6
Soren Bondrup-Nielsen*
Affiliation:
Centre for Wildlife and Conservation Biology, Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada B4P 2R6
*
1Corresponding author (e-mail: [email protected]).
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Abstract

The habitat of Bolitotherus cornutus Panzer consists primarily of sporophores of the shelf fungus Fomes fomentarius (L.:Fr.) J. Kickx fil. Each sporophore is discrete and often several are present on a single dead log or standing snag, especially of paper birch (Betula papyrifera Marsh.). An exploratory approach was used to examine habitat use at three scales (the single sporophore, a single log supporting up to several sporophores, and a group of logs supporting sporophores) by modeling incidence of adult B. cornutus. Sporophore volume and decay were important for the beetles at all scales. Patches containing a variety of states of sporophores from alive to dead and decomposing are probably most suitable to B. cornutus. Results are compared with those for the related European beetle Bolitophagus reticulatus (L.), which is similar ecologically and also occupies F. fomentarius sporophores.

Résumé

L'habitat de Bolitotherus cornutus Panzer est constitué principalement des sporophores de l'amadouvier Fomes fomentarius (L.:Fr.) J. Kickx fil. Chaque sporophore est séparé et il peut y en avoir plusieurs sur un même arbre tombé ou sur un même tronc mort dressé, particulièrement de bouleau à papier (Betula papyrifera Marsh.). Nous avons utilisé une approche exploratoire à trois échelles (un seul sporophore, un seul tronc couvert d'un à plusieurs sporophores, un groupe de troncs possédant des sporophores) pour faire un modèle de la fréquence des adultes de B. cornutus. Le volume et la décomposition des sporophores sont d'importance pour les coléoptères à toutes les échelles. Des parcelles contenant des sporophores de diverses conditions, vivants et en voie de décomposition, sont probablement les plus propices à B. cornutus. Nous comparons nos résultats avec ceux qui ont été obtenus chez le coléoptère européen apparenté Bolitophagus reticulatus (L.) qui possède une écologie similaire et qui vit aussi dans les sporophores de F. fomentarius.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 137 , Issue 2 , April 2005 , pp. 192 - 201
Copyright
Copyright © Entomological Society of Canada 2005

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