Search for dissertations about: "15N natural abundance"
Showing result 1 - 5 of 11 swedish dissertations containing the words 15N natural abundance.
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1. Uptake of and Preference for Nitrate, Ammonium and Amino Acids by Understory Species in Deciduous Forests
Abstract : AbstractThe uptake of different nitrogen forms by understory species was studied in field and laboratory. Species of the understory in deciduous forests have previously been thought to take up and assimilate only inorganic nitrogen sources. READ MORE
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2. Mechanisms of below-ground carbon cycling in subarctic ecosystems
Abstract : Some components of the below-ground carbon (C) cycle in terrestrial ecosystems are still poorly understood. A better understanding will be necessary to predict adequately the impacts of global change factors on C cycling and storage, especially in high-latitude ecosystems, where much of the C is stored below-ground. READ MORE
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3. Herbivores influence nutrient cycling and plant nutrient uptake : insights from tundra ecosystems
Abstract : Reindeer appear to have strong positive effects on plant productivity and nutrient cycling in strongly nutrient-limited ecosystems. While the direct effects of grazing on vegetation composition have been intensively studied, much less is known about the indirect effect of grazing on plant-soil interactions. READ MORE
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4. Plant-microbe-soil interactions and soil nitrogen dynamics in boreal forests : development of nitrogen limitation
Abstract : Widespread nitrogen (N) limitation of plant growth in boreal forests is a well recognized phenomenon. Yet, the mechanisms responsible for the development of N limitation are unknown. By exploring the linkage between N cycling and microbial community structure, this thesis examines the role of soil microorganisms in N limitation development. READ MORE
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5. Plant Membrane Proteomics - using isolated membranes and proteins to compare and quantify subproteomes
Abstract : Membrane proteins are particularly important to characterize, since they are involved in cellular processes of utmost importance in control and regulation of cells, such as transport across membranes, signal transduction and photosynthesis. The word "proteome" means all proteins expressed by a e.g. READ MORE