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Visar resultat 1 - 5 av 46 avhandlingar som matchar ovanstående sökkriterier.

  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 :NATURVETENSKAP; NATURAL SCIENCES; 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

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

    Författare :Florence Colleoni; Martin Jakobsson; Johan Nilsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 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

  4. 3. Northern Hemispheric Cold Spells and their Tropospheric-Stratospheric Link

    Författare :Kathrin Finke; Abdel Hannachi; Jörg Gumbel; Alexey Karpechko; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atmospheric Sciences and Oceanography; atmosfärvetenskap och oceanografi;

    Sammanfattning : Cold spells have severe consequences for society. They require early warnings for elaborate mitigation strategies on sub-seasonal to seasonal time-scales. LÄS MER

  5. 4. 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

  7. 5. Phylogeographic Structure and Genetic Variation in Formica Ants

    Författare :Anna Goropashnaya; Pekka Pamilo; David Bilton; Uppsala universitet; []
    Nyckelord :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