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TERRESTRIAL ARTHROPODS OF CANADIAN PEATLANDS: SYNOPSIS OF PAN TRAP COLLECTIONS AT FOUR SOUTHERN ONTARIO PEATLANDS

Published online by Cambridge University Press:  31 May 2012

David C.A. Blades  and
Stephen A. Marshall
David C.A. Blades
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
Stephen A. Marshall
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Abstract

This report is a synopsis of the terrestrial arthropod faunas collected from four peatlands in southern Ontario. The peatlands surveyed were the Wylde Lake bog (43°55′N, 80°30′W), Crieff fen (43°25′N, 80°07′W), Oliver bog (43°20′N, 80°16′W), and the Wainfleet bog (42°55′N, 79°17′W). Arthropods were collected in yellow pan traps (aluminum pan traps at Wainfleet) during the period May 1987 to June 1988 (including the period of snow cover from December to March). A total of 33 029 specimens were removed from the pan trap samples and of these 17 173 individuals were assigned to species. Between 603 and 870 species of arthropods were identified from each site. Collections from each site were compared using taxonomic and ecological groupings (based on feeding behaviour and habitat preference) of species. Sorensen's Index of Similarity was used to compare the overlap of species among sites. The Hymenoptera, Diptera, Coleoptera, and Araneae were the most species-rich orders collected at each site. More species preferring peatlands were collected at each of the three undisturbed peatlands (Wylde L., Crieff, and Oliver) than at the mined bog, Wainfleet. Species not usually associated with peatlands were more numerous in the Wainfleet collection than in collections from the undisturbed sites. It is concluded that grouping of species by habitat preference is a useful technique for assessing habitat disturbance.

Résumé

On trouvera ici un compte-rendu des arthropodes terrestres récoltés dans quatre tourbières du sud de l’Ontario. Les tourbières échantillonnées sont la troubière ombrotrophe du lac Wylde (43°55′N, 80°30′O), la tourbière minérotrophe Crieff (43°25′N, 80°07′O) et les tourbières ombrotrophes Oliver (43°20′N, 80°16′O) et Wainfleet (42°55′N, 79°17′O). Les arthropodes ont été récoltés au moyen de pièges à cuvettes jaunes (cuvettes d’aluminium à Wainfleet) de mai 1987 à juin 1988 (y compris la période de couverture de neige de décembre à mars). Au total, 33 029 spécimens ont été recueillis dans les échantillons et 17 173 ont pu être identifiés à l’espèce. À chaque endroit, entre 603 et 870 espèces d’arthropodes ont été reconnues. Les récoltes des différentes tourbières ont été comparées au moyen de regroupements taxonomiques et de regroupements écologiques d’espèces (basés sur les habitudes alimentaires et les préférences d’habitat). Le chevauchement entre les tourbières a été évalué au moyen de l’indice de similarité de Sorensen. Les hyménoptères, les diptères, les coléoptères et les araignées étaient les ordres les plus riches en espèces représentés dans les tourbières. Plus d’espèces reliées aux tourbières ont été récoltées dans chacune des trois tourbières non perturbées (lac Wylde, Crieff et Oliver) qu’à la tourbière Wainfleet qui est soumise à l’exploitation minière. Les espèces non directement associées aux tourbières étaient plus abondantes dans la tourbière de Wainfleet que dans les tourbières non perturbées. Nous concluons que le regroupement des espèces en fonction de leur préférence d’habitat constitue une bonne méthode d’évaluation des parturbations du milieu. [Traduit par la Rédaction]

Type
Research Article
Information
The Memoirs of the Entomological Society of Canada , Volume 126 , Supplement S169 , 1994 , pp. 221 - 284
Copyright
Copyright © Entomological Society of Canada 1994

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Footnotes

1

Present address: #4 - 957 Meares Street, Victoria, British Columbia, Canada V8V 3J5.

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