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Effects of urban pressure on colonies of Formica rufa group (Hymenoptera, Formicidae) in the town of Espoo (Finland)

100%

Wuorenrinne H.

Annales Zoologici

1988-1989

tom 42

nr 13-17

Quantitative changes in red wood ant populations affected by urban pressure were studied at the town of Espoo (Southern Finland) in 1974-1980. Torossian's (an average mound volume and a total mound volume per ha) and Francour's indices (a number of inhabited, new established and abandoned nests during a year) were analyzed. Differences in the responsivity to anthropogenization of particular species (Formica pratensis Retz., F. rufa L., F. polyctena Foerst., and F. aquilonia Yarb.) were determined.

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1 Annales Zoologici

1 Wuorenrinne H.

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Effects of urban pressure on colonies of Formica rufa group (Hymenoptera, Formicidae) in the town of Espoo (Finland)