Sökning: "Lake Baikal"

Hittade 5 avhandlingar innehållade orden Lake Baikal.

1. 1. Late Cenozoic Geoarchives from Lake Baikal, Siberia

   Författare :Tomasz Sapota; Ala Aldahan; Göran Possnert; Ihsan Al-Aasm; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quaternary geology; Lake Baikal; Be-10 isotope; chronology; paleoclimate; tectonics; geomagnetic field; cosmic rays; Kvartärgeologi; Quaternary geology; Kvartärgeologi;

   Sammanfattning : Three long sediment cores (BDP-98 – 600 m, BDP-96 – 200 m and BDP-93 – 100 m) drilled in Lake Baikal (Siberia) have been studied with the aims of establishing an absolute chronology and reconstructing paleoclimatic and paleoenvironmental changes in the region. The location of the lake at relatively high latitude and continental interior and a thick continuous sedimentary archive that developed in a rift system tectonic setting provide unique material for this investigation. LÄS MER

3. 2. Sediment transport from source to sink in the Lake Baikal basin : Impacts of hydroclimatic change and mining

   Författare :Jan Pietroń; Jerker Jarsjö; Enrica Viparelli; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sediment transport; human impact; hydroclimatic change; surface mining; metal-enriched sediment; Lake Baikal; the Selenga River; the Selenga Delta; Physical Geography; naturgeografi;

   Sammanfattning : Different magnitude, intensity and timing of precipitation can impact runoff, hillslope erosion and transport of sediment along river channels.  Human activities, such as dam construction and surface mining can also considerably influence transport of sediment and sediment-bound contaminants. LÄS MER

4. 3. Hydrological spreading of metal pollution and wetlands as nature-based solutions

   Författare :Josefin Thorslund; Jerker Jarsjö; Mario Schirmer; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical Geography; naturgeografi;

   Sammanfattning : The quality of the Earth’s water resources have deteriorated due to human impacts. A key scientific challenge is to understand, quantify and predict the water-borne spreading of pollutants at relevant scales for freshwater management and water quality restoration programs. LÄS MER

5. 4. Mended by masticates : A study of archaeogenetic proxies of migration, settlement and health in North Eurasian Mesolithic

   Författare :Natalija Kashuba; Anders Kaliff; Mattias Jakobsson; Torun Zachrisson; Tiina Maria Mattila; Lehti Saag; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Archaeogenetics; Mesolithic population genetics; human identity; post-LGM hunter-gatherer societies; aDNA; metagenomics; masticates pitch resin; molecular paleopathology; Archaeology; Arkeologi; Biology with Specialisation in Human Evolution and Genetics; Biologi med inriktning mot människans evolution och genetik;

   Sammanfattning : A joint archaeogenetic perspective integrates diverse lines of evidence from archaeology and paleogenetics to advance our understanding of human prehistory. In this thesis I contribute to the corpus of archaeogenetic data by producing and analysing ancient genomic data from osseous and masticated material. 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