Search for dissertations about: "chronosequence"
Showing result 11 - 15 of 17 swedish dissertations containing the word chronosequence.
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11. Phosphorus availability and microbial respiration across biomes : from plantation forest to tundra
Abstract : Phosphorus is the main limiting nutrient for plant growth in large areas of the world and the availability of phosphorus to plants and microbes can be strongly affected by soil properties. Even though the phosphorus cycle has been studied extensively, much remains unknown about the key processes governing phosphorus availability in different environments. READ MORE
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12. Processes controlling carbon fluxes in the soil-vegetation-atmosphere system
Abstract : Increasing emissions of carbon dioxide (CO2) to the atmosphere have a direct impact on global warming and climate change. The ability of ecosystems to sequester CO2 is therefore of great importance. The Boreal forest contains one of the world’s largest carbon stocks after having acted as a net sink of CO2 for thousands of years. READ MORE
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13. The introduction of Pinus contorta in Sweden : implications for forest diversity
Abstract : An increasing demand for forest-based products calls for further development and intensification of forest management. The use of non-native tree species in forestry is a common and expanding silvicultural practice worldwide but the effect of non-native trees on native biodiversity and ecosystem functioning is still poorly understood. READ MORE
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14. Plant community assembly during succession from arable fields to semi-natural grassland
Abstract : Large areas of grazed, species rich semi-natural grassland were lost in Europe during the last two centuries and as a consequence led to decreases in grassland specialist species. Therefore, today the “restoration” of grassland on previously arable fields is recommended for the protection of grassland specialists. READ MORE
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15. Stand development effects on N₂-fixation and seedling performance in northern boreal forests
Abstract : For large parts of the Swedish boreal forests, stand development starts with clear-cutting. Still, much is unknown about how stand development affects ecosystem processes and how these processes are driven by changes in vegetation and soil properties that occur during stand development. READ MORE