Sökning: "boreal forest soil"
Visar resultat 21 - 25 av 105 avhandlingar innehållade orden boreal forest soil.
21. Interactions between ectomycorrhizal associations and bacteria
Sammanfattning : Boreal forest podzol soils have vertically stratified horizons with different physico-chemical characteristics and high microbial diversity. Ectomycorrhizal fungi play key roles in accessing nutrients from both organic and mineral substrates. The role of associated bacteria in these processes is still poorly understood. LÄS MER
22. Biogeochemical processes in frozen soils : unfrozen water in frozen soils and factors regulating carbon mineralization at low temperatures
Sammanfattning : High latitude ecosystems are important for global carbon (C) balances and are among the most sensitive ecosystems to climate change. Microbial CO2 production in soil is known to proceed at temperatures < 0ºC in these regions and winter CO2 emissions can significantly affect annual C balances. LÄS MER
23. Forestry impact on water quality: a landscape perspective on dissolved organic carbon
Sammanfattning : Dissolved organic carbon (DOC) is a fundamental variable defining boreal stream ecosystems. In this thesis the impact of forestry practices that are commonly performed in the boreal regions of Scandinavia for stream water quality were evaluated. LÄS MER
24. Improving boreal forest regeneration in a variable climate
Sammanfattning : Regeneration of boreal forests in Sweden mainly involves planting Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.) seedlings on clear-cut areas, although there is an increasing interest in planting broadleaves and in applying continuous cover forestry (CCF). LÄS MER
25. Digital wet areas mapping
Sammanfattning : Wet soil in forested landscapes of the boreal zone is often associated with large open wetlands or peatlands, but it may also be hidden beneath closed forest canopies on drained wetlands or wet strips beside streams known as riparian zones. Since these wet areas are shrouded by canopy they have traditionally been difficult to map from aerial photographs. LÄS MER