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Inferring dispersal across a fragmented landscape using reconstructed families in the Glanville fritillary butterfly
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Univ Helsinki, Dept Biosci, Helsinki, Finland.
Univ Helsinki, Dept Biosci, Helsinki, Finland.
Univ Helsinki, Dept Biosci, Helsinki, Finland;Lund Univ, Dept Biol, Lund, Sweden.
Univ Helsinki, Dept Biosci, Helsinki, Finland.
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2018 (English)In: Evolutionary Applications, ISSN 1752-4571, E-ISSN 1752-4571, Vol. 11, no 3, p. 287-297Article in journal (Refereed) Published
Abstract [en]

Dispersal is important for determining both species ecological processes, such as population viability, and its evolutionary processes, like gene flow and local adaptation. Yet obtaining accurate estimates in the wild through direct observation can be challenging or even impossible, particularly over large spatial and temporal scales. Genotyping many individuals from wild populations can provide detailed inferences about dispersal. We therefore utilized genomewide marker data to estimate dispersal in the classic metapopulation of the Glanville fritillary butterfly (Melitaea cinxia L.), in the Aland Islands in SW Finland. This is an ideal system to test the effectiveness of this approach due to the wealth of information already available covering dispersal across small spatial and temporal scales, but lack of information at larger spatial and temporal scales. We sampled three larvae per larval family group from 3732 groups over a six-year period and genotyped for 272 SNPs across the genome. We used this empirical data set to reconstruct cases where full-sibs were detected in different local populations to infer female effective dispersal distance, that is, dispersal events directly contributing to gene flow. On average this was one kilometre, closely matching previous dispersal estimates made using direct observation. To evaluate our power to detect full-sib families, we performed forward simulations using an individual-based model constructed and parameterized for the Glanville fritillary metapopulation. Using these simulations, 100% of predicted full-sibs were correct and over 98% of all true full-sib pairs were detected. We therefore demonstrate that even in a highly dynamic system with a relatively small number of markers, we can accurately reconstruct full-sib families and for the first time make inferences on female effective dispersal. This highlights the utility of this approach in systems where it has previously been impossible to obtain accurate estimates of dispersal over both ecological and evolutionary scales.

Place, publisher, year, edition, pages
WILEY , 2018. Vol. 11, no 3, p. 287-297
Keywords [en]
Colonization, COLONY, conservation genetics, dispersal, Melitaea cinxia, sibship reconstruction
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-352985DOI: 10.1111/eva.12552ISI: 000429324200001OAI: oai:DiVA.org:uu-352985DiVA, id: diva2:1233406
Available from: 2018-07-17 Created: 2018-07-17 Last updated: 2018-07-17Bibliographically approved

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