Responses to Fire by Taiga Spiders

C.W. Aitchison-Bennell

Department of Zoology,
The University of Manitoba,
Winnipeg, Manitoba, Canada
R3T 2N2

 

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Aitchison-Benell, C. W. 1994. Responses to Fire by Taiga Spiders. Memoirs of the Entomological Society of Ontario 125: 29-41.

 

Abstract

The basic objective of this study was to determine those possible pioneer and climax species from disturbed and undisturbed plots respectively. In southeastern Manitoba, pitfall transects in freshly-burnt and control bogs, dominated by Picea marinara, and pine ridges, dominated by Pinus banksiana, collected a total of 69 species of spiders, with 50 species taken from burned plots and 45 from control plots; 26 species were common to both plots. Species preferring burned plots included four species of Pardosa, Alopecosa aculeata (Clerck), Trochosa terricola Thorell (all in the family Lycosidae), Agroeca ornata Banks (Liocranidae), Erigone atra Blackwall (Erigonidae), Pocadicnemis americana Millidge (Erigonidae), Tunagyna debilis (Banks) (Erigonidae), and Bathyphantes pallidus (Banks) (Linyphiidae). Species found only in control plots included Hogna frondicola (Emerton) (Lycosidae), Gnaphosa microps Holm (Gnaphosidae) and Neoantistea agilis (Keyserling) (Hahniidae). Numbers were high for two months after the fire and then decreased, following usual seasonality and activity patterns.

 


 

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