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OCCURRENCE OF CARABID BEETLES (COLEOPTERA: CARABIDAE) IN A BOREAL FOREST DAMAGED BY FIRE

Published online by Cambridge University Press:  31 May 2012

R. J. Richardson
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba R3T 2N2
N. J. Holliday
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba R3T 2N2

Abstract

Fifteen months after an intense forest fire, the fauna of carabid beetles in burnt and unburnt sites was sampled using pitfall traps to detect the indirect effects of fire on carabids caused by habitat change. Traps were installed in burnt and unburnt sites in which the dominant tree species before the fire was either spruce or aspen. The most commonly caught species was Pterostichus pensylvanicus which was captured more frequently in unburnt sites, but was not affected by dominant tree species; a similar pattern of distribution of captures was found for Carabus taedatus. Harpalus laticeps was captured only in burnt sites. P. lucublandus and Dicaelus sculptilis upioides were most commonly caught in the unburnt aspen site, while Pterostichus adstrictus was most commonly caught in the burnt spruce site.

Résumé

Quinze mois après un feu de forêt grave, la faune carabique de parcelles brûlées ou non brûlées a été inventoriée à l'aide de trappes afin de déterminer les effets indirects du feu sur les carabes suite à la perturbation du milieu. Des trappes furent placées dans des parcelles buûlées ou intactes, où l'espèce d'arbre dominante avant le feu était soit l'épinette, soit le tremble. L'espèce piégée le plus souvent a été Pterostichus pensylvanicus, laquelle fût capturée plus fréquemment dans les parcelles non brûlées, mais n'était pas influencée par l'espèce d'arbre dominante; un profil de distribution des captures similaire a été mis en évidence pour Carabus taedatus. Harpalus laticeps fût capturé seulement dans les parcelles brûlées. P. lucublandus et Dicaelus sculptais upioides ont été capturés le plus souvent dans la parcelle de tremble intacte, alors que Pterostichus adstrictus a été capturé le plus souvent dans la parcelle d'épinette brûlée.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1982

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