Avancerad sökning
Visar resultat 1 - 5 av 7 avhandlingar som matchar ovanstående sökkriterier.
1. Quantity and quality of soil organic matter in permafrost terrain
Sammanfattning : High latitude terrestrial ecosystems are considered key components in the global carbon (C) cycle and hold large reservoirs of soil organic carbon (SOC). Much of this is stored as soil organic matter (SOM) in permafrost soils and peat deposits and is vulnerable to remobilization under future global warming. LÄS MER
2. Temporal and spatial dynamics in subarctic peat plateaus and thermokarst lakes
Sammanfattning : Permafrost peatlands are widespread at high northern latitudes and are important soil organic carbon reservoirs. A future warming in these areas, as suggested by global climate models, can cause thawing and increased ground subsidence (thermokarst), resulting in changes in surface hydrology and ecosystem functioning. LÄS MER
3. Diversity and functional potential of fungal communities in Arctic and boreal freshwaters
Sammanfattning : Fungi are important decomposers of the organic matter (OM) in terrestrial environments, but there is limited knowledge about their ecological roles in aquatic ecosystems. This thesis applies a variety of molecular techniques (e.g. LÄS MER
4. Emission of methane from northern lakes and ponds
Sammanfattning : Northern lakes and ponds are abundant and emit large amounts of the potent climate forcer methane to the atmosphere at rates prone to change with amplified Arctic warming. In spite of being important, fluxes from surface waters are not well understood. LÄS MER
5. High-resolution mapping and spatial variability of soil organic carbon storage in permafrost environments
Sammanfattning : Large amounts of carbon are stored in soils of the northern circumpolar permafrost region. High-resolution mapping of this soil organic carbon (SOC) is important to better understand and predict local to global scale carbon dynamics. LÄS MER
