Eur. J. Entomol. 108 (2): 327-330, 2011 | DOI: 10.14411/eje.2011.039

When landscape variables do not explain migration rates: An example from an endangered dragonfly, Leucorrhinia caudalis (Odonata: Libellulidae)

Janine BOLLIGER, Daniela KELLER, Rolf HOLDEREGGER
Swiss Federal Research Institute WSL, Zürcherstrasse 111, CH-8903 Birmensdorf, Switzerland; e-mail: janine.bolliger@wsl.ch

Leucorrhinia caudalis is a dragonfly species threatened throughout Europe. Despite evidence of the recent extension of its distribution range, it is unknown whether L. caudalis regularly or hardly ever migrates among ponds. The contemporary migration patterns of the species were investigated using Bayesian assignment tests and the migration rates related to landscape structural and thematic variables (distance between ponds, forest area, area of water body, area of hedgerow). Migration rates of L. caudalis are independent of any landscape element. Thus, landscape structure is not a barrier or corridor for migration in this species. The tendency of L. caudalis to disperse is largely independent of the nature of the landscape, at least at the scale of the present study.

Keywords: Odonata, Leucorrhinia caudalis, assignment test, BIMR, contemporary gene flow, landscape genetics, microsatellites, Switzerland

Received: September 16, 2010; Accepted: December 15, 2010; Published: April 5, 2011

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