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Microsatellite genotyping reveals end-Pleistocene shift in mammoth autosomal genetic variation
Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen.
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(Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:su:diva-42497OAI: oai:DiVA.org:su-42497DiVA, id: diva2:347901
Tillgänglig från: 2010-09-03 Skapad: 2010-09-03 Senast uppdaterad: 2019-12-16Bibliografiskt granskad
Ingår i avhandling
1. Studies of declining populations - temporal genetic analyses of two arctic mammals
Öppna denna publikation i ny flik eller fönster >>Studies of declining populations - temporal genetic analyses of two arctic mammals
2010 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Many populations and species are threatened with extinction today. Understanding the extinction process and the factors behind population decline is therefore important. In this thesis, genetic analyses were performed on temporally spaced samples to investigate the demographic history and genetic effects of population reduction of two species: the arctic fox (Vulpes lagopus) and the woolly mammoth (Mammuthus primigenius). We used ancient DNA techniques to measure genetic variation in both mitochondrial DNA and microsatellites. In paper I, we investigated the genetic consequences of a human-induced demographic bottleneck in the Scandinavian arctic fox population. By comparing genetic data from museum specimens with genetic data from the contemporary population, we found a loss of genetic variation. However, the loss was less than expected, probably due to gene flow from North Russia. Using the same approach, we also found that Pleistocene arctic foxes from midlatitude Europe do not seem to have contributed to the genetic composition of contemporary populations (paper II). This suggests that they went extinct rather than track their habitat when it shifted northwards at the end of Pleistocene. Further, by analysing genetic data from radiocarbon dated fossils, we also found that the woolly mammoth lost genetic variation in connection to a marked decline in population size at the end of Pleistocene (paper III and IV). However, no further losses were detected during the time that mammoths were isolated on Wrangel Island, which suggests a rapid extinction process possibly caused by the arrival of humans or a short-term change in climate (paper III and IV). The results in this thesis demonstrate the usefulness of temporal genetic analyses for identifying population decline and evaluating its consequences.

Ort, förlag, år, upplaga, sidor
Stockholm: Department of Zoology, Stockholm University, 2010. s. 16
Nyckelord
Vulpes lagopus, Mammuthus primigenius, population reduction, extinction, ancient DNA, mitochondrial DNA, microsatellites, genetic variation
Nationell ämneskategori
Naturvetenskap
Forskningsämne
zoologisk ekologi
Identifikatorer
urn:nbn:se:su:diva-42499 (URN)978-91-7447-126-7 (ISBN)
Disputation
2010-10-15, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning
At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 4: Manuscript.Tillgänglig från: 2010-09-23 Skapad: 2010-09-03 Senast uppdaterad: 2014-10-13Bibliografiskt granskad

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Nyström, VeronicaLidén, KerstinAngerbjörn, AndersDalén, Love
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Zoologiska institutionenInstitutionen för arkeologi och antikens kultur
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