Search for dissertations about: "naturgeografi"
Showing result 11 - 15 of 335 swedish dissertations containing the word naturgeografi.
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11. Diatoms as indicators of Holocene climate and environmental change in northern Sweden
Abstract : The objective of the thesis was to explore the potential of diatoms (Bacillariophyceae) as indicators of Holocene climate and environmental change in northern Sweden (Abisko region, 68°21'N, 18°49'E). A modern surface-sediment calibration set including 100 lakes was developed and lake-water pH, sedimentary organic content (assessed by loss-on-ignition) and temperature were identified as most powerful environmental variables explaining the variance within the diatom assemblages. READ MORE
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12. Carbon metabolism in clear-water and brown-water lakes
Abstract : The trophic state of lakes is commonly defined by the concentration of nutrients in the water column. High nutrient concentrations generate high phytoplankton production, and lakes with low nutrient concentrations are considered low-productive. READ MORE
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13. Spatial and Temporal Variations of Solifluction and Related Environmental Parameters in the Abisko Mountains, Northern Sweden
Abstract : This thesis presents an assessment of the variation in solifluction occurrence, morphometry and movement rates in the Abisko region, northern Sweden. Variations in movement rates are analyzed both on a regional and local scale. READ MORE
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14. Production and emission of CO2 in two unproductive lakes in northern Sweden
Abstract : Unproductive lakes are one of few natural landscape compartments with net release of carbon to the atmosphere. Lakes also generally decrease the net terrestrial carbon uptake, since most of the CO2 production in unproductive lakes are derived from organic carbon produced on land (e.g. in forests). READ MORE
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15. Soil organic carbon stocks in high mountain periglacial settings of Patagonia (SW Argentina) and Vindelfjällen (NW Sweden)
Abstract : .... READ MORE