Divergent evolutionary processes associated with colonization of offshore islands

Natalia Martinovka, Ross Barnett, Thomas Cucchi, Rahel Struchen, Marine Pascal, Michel Pascal, Martin C Fischer, Thomas Higham, Selina Brace, Simon Y W Ho, Jean-Pierre Quere, Paul O'Higgins, Laurent Excoffier, Gerald Heckel, A Rus Hoelzel, Keith Dobney, Jeremy B Searle

Research output: Contribution to journalArticle

56 Citations (Scopus)
7 Downloads (Pure)

Abstract

Oceanic islands have been a test ground for evolutionary theory, but here, we focus on the possibilities for evolutionary study created by offshore islands. These can be colonized through various means and by a wide range of species, including those with low dispersal capabilities. We use morphology, modern and ancient sequences of cytochrome b (cytb) and microsatellite genotypes to examine colonization history and evolutionary change associated with occupation of the Orkney archipelago by the common vole (Microtus arvalis), a species found in continental Europe but not in Britain. Among possible colonization scenarios, our results are most consistent with human introduction at least 5100 bp (confirmed by radiocarbon dating). We used approximate Bayesian computation of population history to infer the coast of Belgium as the possible source and estimated the evolutionary timescale using a Bayesian coalescent approach. We showed substantial morphological divergence of the island populations, including a size increase presumably driven by selection and reduced microsatellite variation likely reflecting founder events and genetic drift. More surprisingly, our results suggest that a recent and widespread cytb replacement event in the continental source area purged cytb variation there, whereas the ancestral diversity is largely retained in the colonized islands as a genetic ‘ark’. The replacement event in the continental M. arvalis was probably triggered by anthropogenic causes (land-use change). Our studies illustrate that small offshore islands can act as field laboratories for studying various evolutionary processes over relatively short timescales, informing about the mainland source area as well as the island.
Original languageEnglish
Pages (from-to)5205-5220
Number of pages16
JournalMolecular Ecology
Volume22
Issue number20
Early online date2 Sep 2013
DOIs
Publication statusPublished - Oct 2013

Fingerprint

Islands
colonization
Microtus arvalis
Cytochromes b
cytochrome b
cytochrome
Arvicolinae
Microsatellite Repeats
Radiometric Dating
replacement
microsatellite repeats
timescale
Genetic Drift
radiocarbon dating
history
evolutionary theory
Bayes Theorem
genetic drift
Belgium
Occupations

Keywords

  • demographic analysis
  • genetic replacement
  • island colonization
  • Microtus arvalis
  • phylogeography

Cite this

Martinovka, N., Barnett, R., Cucchi, T., Struchen, R., Pascal, M., Pascal, M., ... Searle, J. B. (2013). Divergent evolutionary processes associated with colonization of offshore islands. Molecular Ecology, 22(20), 5205-5220. https://doi.org/10.1111/mec.12462

Divergent evolutionary processes associated with colonization of offshore islands. / Martinovka, Natalia; Barnett, Ross; Cucchi, Thomas; Struchen, Rahel; Pascal, Marine; Pascal, Michel; Fischer, Martin C; Higham, Thomas; Brace, Selina ; Ho, Simon Y W; Quere, Jean-Pierre; O'Higgins, Paul; Excoffier, Laurent; Heckel, Gerald; Hoelzel, A Rus; Dobney, Keith; Searle, Jeremy B.

In: Molecular Ecology, Vol. 22, No. 20, 10.2013, p. 5205-5220.

Research output: Contribution to journalArticle

Martinovka, N, Barnett, R, Cucchi, T, Struchen, R, Pascal, M, Pascal, M, Fischer, MC, Higham, T, Brace, S, Ho, SYW, Quere, J-P, O'Higgins, P, Excoffier, L, Heckel, G, Hoelzel, AR, Dobney, K & Searle, JB 2013, 'Divergent evolutionary processes associated with colonization of offshore islands', Molecular Ecology, vol. 22, no. 20, pp. 5205-5220. https://doi.org/10.1111/mec.12462
Martinovka N, Barnett R, Cucchi T, Struchen R, Pascal M, Pascal M et al. Divergent evolutionary processes associated with colonization of offshore islands. Molecular Ecology. 2013 Oct;22(20):5205-5220. https://doi.org/10.1111/mec.12462
Martinovka, Natalia ; Barnett, Ross ; Cucchi, Thomas ; Struchen, Rahel ; Pascal, Marine ; Pascal, Michel ; Fischer, Martin C ; Higham, Thomas ; Brace, Selina ; Ho, Simon Y W ; Quere, Jean-Pierre ; O'Higgins, Paul ; Excoffier, Laurent ; Heckel, Gerald ; Hoelzel, A Rus ; Dobney, Keith ; Searle, Jeremy B. / Divergent evolutionary processes associated with colonization of offshore islands. In: Molecular Ecology. 2013 ; Vol. 22, No. 20. pp. 5205-5220.
@article{6adc4a3947a349018550f47afa398db4,
title = "Divergent evolutionary processes associated with colonization of offshore islands",
abstract = "Oceanic islands have been a test ground for evolutionary theory, but here, we focus on the possibilities for evolutionary study created by offshore islands. These can be colonized through various means and by a wide range of species, including those with low dispersal capabilities. We use morphology, modern and ancient sequences of cytochrome b (cytb) and microsatellite genotypes to examine colonization history and evolutionary change associated with occupation of the Orkney archipelago by the common vole (Microtus arvalis), a species found in continental Europe but not in Britain. Among possible colonization scenarios, our results are most consistent with human introduction at least 5100 bp (confirmed by radiocarbon dating). We used approximate Bayesian computation of population history to infer the coast of Belgium as the possible source and estimated the evolutionary timescale using a Bayesian coalescent approach. We showed substantial morphological divergence of the island populations, including a size increase presumably driven by selection and reduced microsatellite variation likely reflecting founder events and genetic drift. More surprisingly, our results suggest that a recent and widespread cytb replacement event in the continental source area purged cytb variation there, whereas the ancestral diversity is largely retained in the colonized islands as a genetic ‘ark’. The replacement event in the continental M. arvalis was probably triggered by anthropogenic causes (land-use change). Our studies illustrate that small offshore islands can act as field laboratories for studying various evolutionary processes over relatively short timescales, informing about the mainland source area as well as the island.",
keywords = "demographic analysis, genetic replacement, island colonization, Microtus arvalis, phylogeography",
author = "Natalia Martinovka and Ross Barnett and Thomas Cucchi and Rahel Struchen and Marine Pascal and Michel Pascal and Fischer, {Martin C} and Thomas Higham and Selina Brace and Ho, {Simon Y W} and Jean-Pierre Quere and Paul O'Higgins and Laurent Excoffier and Gerald Heckel and Hoelzel, {A Rus} and Keith Dobney and Searle, {Jeremy B}",
year = "2013",
month = "10",
doi = "10.1111/mec.12462",
language = "English",
volume = "22",
pages = "5205--5220",
journal = "Molecular Ecology",
issn = "0962-1083",
publisher = "Wiley-Blackwell",
number = "20",

}

TY - JOUR

T1 - Divergent evolutionary processes associated with colonization of offshore islands

AU - Martinovka, Natalia

AU - Barnett, Ross

AU - Cucchi, Thomas

AU - Struchen, Rahel

AU - Pascal, Marine

AU - Pascal, Michel

AU - Fischer, Martin C

AU - Higham, Thomas

AU - Brace, Selina

AU - Ho, Simon Y W

AU - Quere, Jean-Pierre

AU - O'Higgins, Paul

AU - Excoffier, Laurent

AU - Heckel, Gerald

AU - Hoelzel, A Rus

AU - Dobney, Keith

AU - Searle, Jeremy B

PY - 2013/10

Y1 - 2013/10

N2 - Oceanic islands have been a test ground for evolutionary theory, but here, we focus on the possibilities for evolutionary study created by offshore islands. These can be colonized through various means and by a wide range of species, including those with low dispersal capabilities. We use morphology, modern and ancient sequences of cytochrome b (cytb) and microsatellite genotypes to examine colonization history and evolutionary change associated with occupation of the Orkney archipelago by the common vole (Microtus arvalis), a species found in continental Europe but not in Britain. Among possible colonization scenarios, our results are most consistent with human introduction at least 5100 bp (confirmed by radiocarbon dating). We used approximate Bayesian computation of population history to infer the coast of Belgium as the possible source and estimated the evolutionary timescale using a Bayesian coalescent approach. We showed substantial morphological divergence of the island populations, including a size increase presumably driven by selection and reduced microsatellite variation likely reflecting founder events and genetic drift. More surprisingly, our results suggest that a recent and widespread cytb replacement event in the continental source area purged cytb variation there, whereas the ancestral diversity is largely retained in the colonized islands as a genetic ‘ark’. The replacement event in the continental M. arvalis was probably triggered by anthropogenic causes (land-use change). Our studies illustrate that small offshore islands can act as field laboratories for studying various evolutionary processes over relatively short timescales, informing about the mainland source area as well as the island.

AB - Oceanic islands have been a test ground for evolutionary theory, but here, we focus on the possibilities for evolutionary study created by offshore islands. These can be colonized through various means and by a wide range of species, including those with low dispersal capabilities. We use morphology, modern and ancient sequences of cytochrome b (cytb) and microsatellite genotypes to examine colonization history and evolutionary change associated with occupation of the Orkney archipelago by the common vole (Microtus arvalis), a species found in continental Europe but not in Britain. Among possible colonization scenarios, our results are most consistent with human introduction at least 5100 bp (confirmed by radiocarbon dating). We used approximate Bayesian computation of population history to infer the coast of Belgium as the possible source and estimated the evolutionary timescale using a Bayesian coalescent approach. We showed substantial morphological divergence of the island populations, including a size increase presumably driven by selection and reduced microsatellite variation likely reflecting founder events and genetic drift. More surprisingly, our results suggest that a recent and widespread cytb replacement event in the continental source area purged cytb variation there, whereas the ancestral diversity is largely retained in the colonized islands as a genetic ‘ark’. The replacement event in the continental M. arvalis was probably triggered by anthropogenic causes (land-use change). Our studies illustrate that small offshore islands can act as field laboratories for studying various evolutionary processes over relatively short timescales, informing about the mainland source area as well as the island.

KW - demographic analysis

KW - genetic replacement

KW - island colonization

KW - Microtus arvalis

KW - phylogeography

U2 - 10.1111/mec.12462

DO - 10.1111/mec.12462

M3 - Article

VL - 22

SP - 5205

EP - 5220

JO - Molecular Ecology

JF - Molecular Ecology

SN - 0962-1083

IS - 20

ER -