Search for dissertations about: "palynology"

Showing result 6 - 10 of 11 swedish dissertations containing the word palynology.

  2. 6. Holocene climate and environmental dynamics on the Tristan da Cunha island group, South Atlantic

    Author : Karl Ljung; Kvartärgeologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; palynologi; Geology; climate change; pollen analysis; Palaeobotany; phylogeny; palynology; Paleobotanik; fylogeni; vegetation change; gyttja; peat; Holocene; Quaternary; South Atlantic; Tristan da Cunha; physical geography; Geologi; fysisk geografi;

    Abstract : It has been shown that the present interglacial has been climatically dynamic with both rapid and severe climatic fluctuations. The spatial and temporal differences of these changes are however not fully resolved. The aim of this thesis is to present a detail high resolution record of past climate changes from the central South Atlantic. READ MORE

  4. 7. Encountering Environments. Natural conditions for subsistence and trade at Monte Polizzo, Sicily, 650-550 BC

    Author : Cecilia Sandström; Göteborgs universitet; []
    Keywords : HUMANIORA; HUMANITIES; Ancient Sicily; Western Sicily; Monte Polizzo; Elymian; Indigenous; Iron Age; Archaic; Ancient environment; Archaeology; Geoarchaeology; Landscape Archaeology; Ecology; Geomorphology; Rivers; Ancient navigability; Subsistence; Land use; Trade; Trade routes; Transport amphorae; Connectivity; Household economy; Palynology; Exchange; Selinus; Motya; Segesta;

    Abstract : The overall aim of this thesis is to deepen our knowledge about indigenous western Sicilians commonly called the Elymians and, ultimately, to recognise them as independent actors in Sicilian history. A vital part of this endeavour is to assess the Elymian role in regional trade and to evaluate the subsistence challenges they faced. READ MORE

  5. 8. Cretaceous palynofloras from southern Scandinavia

    Author : Vivi Vajda; Berggrundsgeologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Paleobotanik; phylogeny; Palaeobotany; Cingutriletes scanicus sp. nov; Palynology; palynofacies; paleovegetation; transgression; Early Cretaceous; Cenomanian; Turonian; Bornholm; Denmark; Sweden; Scania; fylogeni; palynologi; Geology; physical geography; Geologi; fysisk geografi;

    Abstract : A palynological investigation of Cretaceous sequences from Höllviken 2, Svedala 1 and Norrevång 1 wells of Scania, Southern Sweden, and from the Arnager Greensand-Arnager Limestone transition on the island of Bornholm, Denmark, was conducted. Well preserved palynofloras were found in strata consisting of shaly mudstones, glauconitic sandstones (greensand) and limestone. READ MORE

  6. 9. Temporal variation and phytotoxicity of Batatasin-III produced by Empetrum hermaphroditum

    Author : Anna Wallstedt; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Palaeobotany; nitrogen uptake; photosynthesis; inhibition; temporal variation; chemical interference; boreal forest; Empetrum hermaphroditum; batatasin-III; phylogeny; palynology; Paleobotanik; fylogeni; palynologi; Biology; Biologi;

    Abstract : In northern Sweden, the clonal dwarf shrub Empetrum hermaphroditum Hagerup exerts strong inhibitory effects on other plant species. These inhibitory effects may, at least in part, be attributed to the high production of the secondary metabolite, batatasin-III, which is released from leaves and transported to the soil by rain (throughfall) and snowmelt. READ MORE

  7. 10. Palynology of Hypochoeridinae and Scolyminae (Compositae)

    Author : Gamal El-Ghazaly; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Pollen grains of 35 species representing all 7 genera of the subtribe Hypochoeridinae, and Scolymus hispanicus of the subtribe Scolyminae were examined by LM, SEM and TEM. The pollen grains of annual species are usually smaller than those of perennial ones. The Hypochoeridinae possesses essentially tricolpororate,echinolophate pollen grains. READ MORE