Sökning: "Eurasia"

Visar resultat 1 - 5 av 34 avhandlingar innehållade ordet Eurasia.

  1. 1. Divergence, selection, demographic history and conservation genomics of sibling bird species in boreal forest in Northern Eurasia and the Qinghai-Tibetan Plateau

    Författare :Kai Song; Jacob Höglund; Yue Hua Sun; Peter Halvarsson; Juha Merilä; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Sichuan Jay; Siberian Jay; Chinese Grouse; Hazel Grouse; genomics; demographic history; ROH; genetic load;

    Sammanfattning : I used two pairs of sibling boreal forest bird species to study divergence, selection, demographics, and conservation in northern Eurasia and the Qinghai-Tibetan Plateau at the microsatellite level (chapter 1) and whole genome level (chapters 2, 3, 4 and 5). In chapter 1, which is the first study to describe genetic diversity of the Sichuan Jay, I used microsatellite markers to estimate genetic differentiation in Sichuan Jay and Siberian Jay populations. LÄS MER

  2. 2. On the Late Saalian glaciation : A climate modeling study

    Författare :Florence Colleoni; Martin Jakobsson; Johan Nilsson; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Climate modeling; Eurasian ice sheet; Quaternary; Saalian; surface mass balance; SST; Earth sciences; Geovetenskap; Marine Geoscience; marin geovetenskap;

    Sammanfattning : This thesis focuses on the glaciation of the Late Saalian period (160 -140 ka) over Eurasia. The Quaternary Environment of the Eurasian North (QUEEN) project determined that during this period, the Eurasian ice sheet was substantially larger than during the entire Weichselian cycle and especially that of the Last Glacial Maximum (21 ka, LGM). LÄS MER

  3. 3. Conservation Genetics of the White-Tailed Eagle

    Författare :Frank Hailer; Hans Ellegren; Carles Vilà; Rob C Fleischer; Uppsala universitet; []
    Nyckelord :Biology; Haliaeetus albicilla; microsatellites; mtDNA; molecular sexing; population structure; bottleneck; phylogeography; raptors; Biologi;

    Sammanfattning : The white-tailed eagle is a formerly threatened raptor that is commonly used as a flagship and indicator species in conservation work. This thesis uses molecular genetic methods to study sex determination of nestlings, genetic variability, population structure and phylogeography of the white-tailed eagle. LÄS MER

  4. 4. Phylogeographic Structure and Genetic Variation in Formica Ants

    Författare :Anna Goropashnaya; Pekka Pamilo; David Bilton; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; Formica ants; phylogeography; phylogeny; Pleistocene refugia; population expansion; social organization; Genetik; Clinical genetics; Klinisk genetik;

    Sammanfattning : The aim of this thesis is to study phylogeny, species-wide phylogeography and genetic diversity in Formica ants across Eurasia in connection with the history of biotic responses to Quaternary environmental changes.The mitochondrial DNA phylogeny of Palaearctic Formica species supported the subgeneric grouping based on morphological similarity. LÄS MER

  5. 5. Cryptic Orogeny : uplift of the Al Hajar Mountains at an alleged passive margin

    Författare :Reuben Johannes Hansman; Ring Uwe; Joachim Jacobs; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; uplift; mountains; structural; low-temperature; thermochronology; dating; fission-track; U-Th He; U-Pb; calcite; structure-from-motion; photogrammetry; UAV; trishear; fault-propagation; Hafit; Al Hajar Mountains; United Arab Emirates; Oman; Geology; geologi;

    Sammanfattning : Mountains evolve and grow because of the large forces that occur from the collision of tectonic plates. Plate boundaries change and move through time, and regions that were once stable, shallow-marine environments can be dragged into subduction zones and get transformed into vast mountain ranges. LÄS MER