Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Population structure in an isolated Arctic fox, Vulpes lagopus, population: the impact of geographical barriers
Stockholm University, Faculty of Science, Department of Zoology. (Svenska fjällrävsprojektet)ORCID iD: 0000-0002-9707-5206
Stockholm University, Faculty of Science, Department of Zoology.ORCID iD: 0000-0001-5535-9086
2009 (English)In: Biological Journal of the Linnean Society, ISSN 0024-4066, E-ISSN 1095-8312, Vol. 97, no 1, 18-26 p.Article in journal (Refereed) Published
Abstract [en]

The genetic composition of a population reflects several aspects of the organism and its environment. The Icelandic Arctic fox population exceeds 8000 individuals and is comprised of both coastal and inland foxes. Several factors may affect within-population movement and subsequent genetic population structure. A narrow isthmus and sheep-proof fences may prevent movement between the north-western and central part and glacial rivers may reduce movement between the eastern and central part of Iceland. Moreover, population density and habitat characteristics can influence movement behaviour further. Here, we investigate the genetic structure in the Icelandic Arctic fox population (n = 108) using 10 microsatellite loci. Despite large glacial rivers, we found low divergence between the central and eastern part, suggesting extensive movement between these areas. However, both model- and frequency-based analyses suggest that the north-western part is genetically differentiated from the rest of Iceland (F-ST = 0.04, D-S = 0.094), corresponding to 100-200 generations of complete isolation. This suggests that the fences cannot be the sole cause of divergence. Rather, the isthmus causes limited movement between the regions, implying that protection in the Hornstrandir Nature Reserve has a minimal impact on Arctic fox population size in the rest of Iceland. (C) 2009 The Linnean Society of London, Biological Journal of the Linnean Society, 2009, 97, 18-26.

Place, publisher, year, edition, pages
2009. Vol. 97, no 1, 18-26 p.
Keyword [en]
coastel, dispersal, divergence, genetic variation, Iceland, inland, isthmus, microsatellites, substructure
National Category
Biological Sciences
Research subject
Animal Ecology
Identifiers
URN: urn:nbn:se:su:diva-29704DOI: 10.1111/j.1095-8312.2009.01172.xISI: 000265406800002ISBN: 0024-4066 OAI: oai:DiVA.org:su-29704DiVA: diva2:234760
Available from: 2009-09-10 Created: 2009-09-10 Last updated: 2017-02-25
In thesis
1. Genetic structure in the North- population connectivity and social organization in the Arctic fox
Open this publication in new window or tab >>Genetic structure in the North- population connectivity and social organization in the Arctic fox
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Genetic variation is distributed on different spatial and temporal scales, reflecting the ecological and geographical complexity in the habitat. In this thesis, the primary objective was to obtain a comprehensive understanding of the genetic structuring in the Arctic fox (Vulpes lagopus) and to identify the underlying factors forming these structures. Using microsatellites, presence of sea ice was identified as the main factor determining the large-scale genetic structure in the Arctic fox. Genetic distinctiveness was demonstrated for populations surrounded by year-round open water (i.e. Iceland and Scandinavia) and among areas connected by sea ice, genetic differentiation was mainly determined by the geographic distance (PAPER I). Movement across the sea ice was influenced by fluctuations in resource abundance caused by the lemming cycle. As a consequence of low lemming abundance, long-distance movement from inland habitats into coastal habitats influenced the genetic structure on a temporal scale (PAPER II). Although the global connectivity was determined by few underlying factors, local population structures were influenced by population-specific historical, demographic and ecological factors (PAPER II, III, IV). Geographical barriers determined genetic structure within the isolated population on Iceland (PAPER III), whereas immigration influenced the local genetic structure in both Svalbard (PAPER II) and Scandinavia (PAPER IV). When population size is low, few immigration events cause rapid changes in genetic composition (PAPER IV), while immigration had a less pronounced effect in larger populations (PAPER II). On the social scale, high flexibility regarding the composition of social groups was recorded as a likely response to local habitat conditions (PAPER V). Complex social groups were more common in habitats with high resource availability and presence of predators than in habitats without predation. This thesis illustrates the importance of ecology and demography forming genetic structure at different scales, and highlights the Arctic fox vulnerability to the ongoing climate change.

Place, publisher, year, edition, pages
Stockholm: Department of Zoology, Stockholm University, 2010. 19 p.
National Category
Biological Sciences
Research subject
Animal Ecology
Identifiers
urn:nbn:se:su:diva-43529 (URN)978-91-7447-155-7 (ISBN)
Public defence
2010-11-26, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 1: In press. Paper 2: Manuscript. Paper 5: Manuscript. Available from: 2010-11-03 Created: 2010-10-19 Last updated: 2014-10-13Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Norén, KarinAngerbjörn, Anders
By organisation
Department of Zoology
In the same journal
Biological Journal of the Linnean Society
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 273 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf