Eur. J. Entomol. 119: 92-98, 2022 | DOI: 10.14411/eje.2022.010

Biogeography and habitat preferences of red wood ants of the Formica rufa group (Hymenoptera: Formicidae) in Finland, based on citizen science dataOriginal article

Jouni SORVARI ORCID...1, 2
1 Department of Biology, University of Turku, FI-20014 Turku, Finland; e-mail: jouni.sorvari@utu.fi
2 Natural Resources Institute Finland (Luke), P.O. Box 2, FI-00790 Helsinki, Finland; e-mail: jouni.sorvari@luke.fi

Red wood ants (RWA) of the Formica rufa group are ecosystem engineers and important species in boreal and temperate forests. However, the permanent and temporal loss of forest habitats is a serious threat to their existence and is likely to increase with climate change. Due to the current threat of losing species, quick actions are needed. Reported here is the biogeography, relative abundance and habitat preferences of five species of RWA in Finland based on citizen science data. Species that occur in the lowlands of the Alps also occur throughout the southern parts of Finland. Only two of the five species, F. aquilonia Yarrow, 1955 and F. lugubris Zetterstedt, 1838, were common throughout the country, including northern Lapland. As their name suggests, RWAs occur mostly in forests and forest edges, but they also sometimes inhabit open or semi-open yards, mires and meadows. The most forest-specialist species is F. aquilonia and the least F. rufa Linnaeus, 1761. Surprisingly, the meadow wood ant F. pratensis Retzius, 1783 is the second most forest dwelling species, however, its preference for forest edges is clearly higher than for forest interiors. Based on current data, F. rufa may be the most tolerant of living close to buildings as its relative abundance in yards was much higher than that of the other species. The data obtained on distributions and relative abundances could be compared in the future with the results of similar surveys to detect changes in species distributions, relative abundances and habitat preferences.

Keywords: Crowd sourcing, latitude gradient

Received: September 3, 2021; Revised: January 17, 2022; Accepted: January 17, 2022; Published online: February 1, 2022  Show citation

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SORVARI, J. (2022). Biogeography and habitat preferences of red wood ants of the Formica rufa group (Hymenoptera: Formicidae) in Finland, based on citizen science data. EJE, 119, Article 92-98. https://doi.org/10.14411/eje.2022.010
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