Change search
ReferencesLink to record
Permanent link

Direct link
Signature of post-glacial expansion and genetic structure at the northern range limit of the speckled wood butterfly
Stockholm University, Faculty of Science, Department of Molecular Biosciences, The Wenner-Gren Institute. Swedish Museum of National History, Sweden.
Stockholm University, Faculty of Science, Department of Zoology. Swedish Museum of National History, Sweden.
Show others and affiliations
2014 (English)In: Biological Journal of the Linnean Society, ISSN 0024-4066, E-ISSN 1095-8312, Vol. 113, no 1, 136-148 p.Article in journal (Refereed) Published
Abstract [en]

The post-glacial recolonisation of northern Europe has left distinct signatures in the genomes of many organisms, both due to random demographic processes and divergent natural selection. However, information on differences in genetic variation in conjunction with patterns of local adaptations along latitudinal gradients is often lacking. In this study, we examine genetic diversity and population structure in the speckled wood butterfly Pararge aegeria in northern Europe to investigate the species post-glacial recolonisation history and discuss how this may have affected its life-history evolution. We collected 209 samples and analysed genetic variation in nine microsatellite loci. The results demonstrated a more pronounced population structure in northern Europe compared with populations further south, as well as an overall decrease in genetic diversity with latitude, likely due to founder effects during the recolonisation process. Coalescent simulations coupled with approximate Bayesian computation suggested that central Scandinavia was colonised from the south, rather than from the east. In contrast to further south, populations at the northern range margin are univoltine expressing only one generation per year. This suggests either that univoltinism evolved independently on each side of the Baltic Sea, or that bivoltinism evolved in the south after northern Europe was recolonised.

Place, publisher, year, edition, pages
2014. Vol. 113, no 1, 136-148 p.
Keyword [en]
Bayesian analyses, coalescent simulations, demographic inference, microsatellites, Pararge aegeria, population structure, post-glacial recolonisation
National Category
Developmental Biology
URN: urn:nbn:se:su:diva-107607DOI: 10.1111/bij.12327ISI: 000340585700011OAI: diva2:750202


Available from: 2014-09-26 Created: 2014-09-22 Last updated: 2014-12-02Bibliographically approved
In thesis
1. Genetic variation and inference of demographic histories in non-model species
Open this publication in new window or tab >>Genetic variation and inference of demographic histories in non-model species
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Both long-term environmental changes such as those driven by the glacial cycles and more recent anthropogenic impacts have had major effects on the past demography in wild organisms. Within species, these changes are reflected in the amount and distribution of neutral genetic variation. In this thesis, mitochondrial and microsatellite DNA was analysed to investigate how environmental and anthropogenic factors have affected genetic diversity and structure in four ecologically different animal species. Paper I describes the post-glacial recolonisation history of the speckled-wood butterfly (Pararge aegeria) in Northern Europe. A decrease in genetic diversity with latitude and a marked population structure were uncovered, consistent with a hypothesis of repeated founder events during the postglacial recolonisation. Moreover, Approximate Bayesian Computation analyses indicate that the univoltine populations in Scandinavia and Finland originate from recolonisations along two routes, one on each side of the Baltic. Paper II aimed to investigate how past sea-level rises affected the population history of the convict surgeonfish (Acanthurus triostegus) in the Indo-Pacific. Assessment of the species’ demographic history suggested a population expansion that occurred approximately at the end of the last glaciation. Moreover, the results demonstrated an overall lack of phylogeographic structure, probably due to the high dispersal rates associated with the species’ pelagic larval stage. Populations at the species’ eastern range margin were significantly differentiated from other populations, which likely is a consequence of their geographic isolation. In Paper III, we assessed the effect of human impact on the genetic variation of European moose (Alces alces) in Sweden. Genetic analyses revealed a spatial structure with two genetic clusters, one in northern and one in southern Sweden, which were separated by a narrow transition zone. Moreover, demographic inference suggested a recent population bottleneck. The inferred timing of this bottleneck coincided with a known reduction in population size in the 19th and early 20th century due to high hunting pressure. In Paper IV, we examined the effect of an indirect but well-described human impact, via environmental toxic chemicals (PCBs), on the genetic variation of Eurasian otters (Lutra lutra) in Sweden. Genetic clustering assignment revealed differentiation between otters in northern and southern Sweden, but also in the Stockholm region. ABC analyses indicated a decrease in effective population size in both northern and southern Sweden. Moreover, comparative analyses of historical and contemporary samples demonstrated a more severe decline in genetic diversity in southern Sweden compared to northern Sweden, in agreement with the levels of PCBs found.

Place, publisher, year, edition, pages
Stockholm: Department of Molecular Biosciences, The Wenner-Gren Institute Stockholm University, 2014. 33 p.
National Category
Biological Sciences
Research subject
Molecular Genetics
urn:nbn:se:su:diva-109896 (URN)9789176490563 (ISBN)
Public defence
2015-01-14, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B, Stockholm, 14:00 (English)

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Manuscript. Paper 3: Manuscript.

Available from: 2014-12-18 Created: 2014-12-01 Last updated: 2016-06-22Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Tison, Jean-LucSandoval-Castellanos, EdsonGotthard, Karl
By organisation
Department of Molecular Biosciences, The Wenner-Gren InstituteDepartment of Zoology
In the same journal
Biological Journal of the Linnean Society
Developmental Biology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 117 hits
ReferencesLink to record
Permanent link

Direct link