Patch size and connectivity influence the population turnover of the threatened chequered blue butterfly, Scolitantides orion (Lepidoptera: Lycaenidae)
Komonen, A., Tikkamäki, T., Mattila, N., & Kotiaho, J. S. (2008). Patch size and connectivity influence the population turnover of the threatened chequered blue butterfly, Scolitantides orion (Lepidoptera: Lycaenidae). European Journal of Entomology, 105, 131-136. https://doi.org/10.14411/eje.2008.018
Julkaistu sarjassa
European Journal of EntomologyPäivämäärä
2008Oppiaine
Ekologia ja evoluutiobiologiaEvoluutiotutkimus (huippuyksikkö)Ecology and Evolutionary BiologyCentre of Excellence in Evolutionary ResearchTekijänoikeudet
© 2008 Institute of Entomology.
Chequered blue butterfly, Scolitantides orion (Lepidoptera: Lycaenidae) has severely declined in many parts of Europe
and is currently red-listed in many countries. We studied the population structure and turnover of the species in a lake-island system
in a National Park in eastern Finland over a three-year period. The incidence of the chequered blue on the suitable islands (n = 41)
and habitat patches (n = 123) was high: an average of 82% of the islands and patches were occupied over the three year period. At
the island scale, the annual population turnover rate was 17%, with an extinction and colonization rate of 7% and 10%, respectively.
At the patch scale, the annual population turnover was 16%, with 7% extinction and 9% colonization rate. Islands that were occupied
over the three year period had a larger area of suitable habitat than islands in which turnover events were observed. At the patch
scale, turnover events were observed in small and poorly connected patches. Patchy occurrence of the host plant and observed
extinction-colonization dynamics suggest that the chequered blue population confirms a metapopulation structure. Although the local
populations are small, the observed high patch occupancy and balanced population turnover indicates that the metapopulation is not
in immediate risk of extinction.
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