Sökning: "allochthonous"
Visar resultat 16 - 20 av 26 avhandlingar innehållade ordet allochthonous.
16. Response of marine food webs to climate-induced changes in temperature and inflow of allochthonous organic matter
Sammanfattning : Global records of temperature show a warming trend both in the atmosphere and in the oceans. Current climate change scenarios indicate that global temperature will continue to increase in the future. The effects will however be very different in different geographic regions. LÄS MER
17. Genesis and Diagenesis of the Phosphatic Hardground of the Holm Dal Formation (Late Middle Cambrian), North Greenland
Sammanfattning : The phosphatic hardground of the Holm Dal Formation (late Middle Cambrian) of North Greenland is composed of two parts: one basal with abundant allochthonous material and an upper part without an allochthonous component. It was formed by release of phosphate, by bacterial degradation, from organic matter which accumulated in lime mudstones on which the hardground developed. LÄS MER
18. Geography and geometry of pre-Caledonian western Baltica: U-Pb geochronology and Palaeomagnetism
Sammanfattning : In an attempt to reconstruct the pre-Caledonian cratonic margin of Fennoscandia, U-Pb geochronological and geochemical investigations have been performed on allochthonous orthogneisses in the northern Swedish Caledonides. The crystalline basement of the nappes have also been examined to further constrain the continuation of various chronologically defined orogenic belts. LÄS MER
19. Role of phagotrophy in freshwater phytoplankton
Sammanfattning : Some phytoplankton have the ability to combine phototrophy and heterotrophy within the same individual, which is called mixotrophy. In this thesis, I adress mixotrophy and competitive interactions of mixotrophs and obligate auto- or heterotrophs in relation to the availability of nutrients, light and prey. LÄS MER
20. Bacterioplankton production and biomass in two lakes of different trophic status : Responses to inorganic nutrients, organic carbon, and other planktonic biota
Sammanfattning : Bacterioplankton growth is affected by physical, chemical, and biological factors. Theavailability of energy and carbon sources, as well as inorganic nutrients, are of specialinterest when studying regulation of heterotrophic bacterioplankton in lakes. LÄS MER