45 uppsatser · sida 2 av 3
naturvärden och kulturhistoria i Rekdalen under 400 år
… valley, Rekdalen, situated in the western part of the county Jämtland in mid-boreal Sweden. It is a part of the Vålådalen forest reserve and has documented ecological values. The aim of the study was to describe how people have used the forest during the last 400 years, to …
… The purpose of this work was to analyse nighttime carbon dioxide fluxes from a boreal coniferous forest, and to map its spatial and temporal variations. The measurements used in the analysis were collected in Norunda (just north of Uppsala, Sweden) between 1994 and 1998 as part …
en studie av olika beståndstyper inom Hamra kronopark, Dalarna
… disturbances, such as burning, are undertaken. In the managed forest in boreal Sweden, the abundance of aspen and goat willow in general is highest in the smaller diameter classes. Favouring these tree species, is an important measure to ensure a high biological diversity in the …
… Aperture Radar (ALOS PALSAR) is investigated for clear-cut detection in boreal forests in northern Sweden (Lat. 64°14? N, Long. 19°50? E). Strong forest/non-forest contrast and temporal consistency were found for the Fine Beam Dual HV-polarized backscatter during unfrozen …
… the grey-sided vole (Myodes rufocanus) which is nearly extinct in the forested region. Since small mammals are an important food source for several avian and mammalian predators, the decline in vole numbers is expected to have consequences for the whole food chain, especially if …
… been important sites for the regeneration of deciduous trees in the natural boreal forest landscape.
effekter av ökad vattentillgång
… species in the Nordic countries and can be found in many different types of boreal forests. It usually forms dense moss carpets on the forest floor. The shoots grow in segments and new segments form annually on the previous years growth. The size of the segments is probably …
… trees growing in riparian forests at the northern and southern shores of boreal lakes in the province Uppland. Little is known about this particular bracket fungus and its inhabitants. Insects were reared out at the laboratory from samples of fruiting bodies of the fungus taken …
The wide distribution range of our boreal pine (Pinus sylvestris L.) provides a great variation in growing conditions and climate/weather factors that influence the wood development of the trees. A great number of extensive studies have been conducted over the years in order to …
vetenskap eller gissningar?
… most important item to increase for the next revision of the standard. In the boreal zone of Sweden the second most important item to increase is the proportion of burned clear-felled stands. In the boreonemoral and nemoral zones of Sweden the second most important item to …
… been the most common disturbance regime on a landscape level in the boreal parts of Sweden. To prevent the loss of biological diversity in the forest the silvicultural system must imitate the previus disturbance regime. By leaving 10 trees per hectare after every clearcutting …
The moose is a keystone species in the boreal forest ecosystem, but the dense Swedish population do cause some serious problems. From a forestry perspective, their browsing on young Scot pine (Pinus sylvestris) causes extensive losses of revenue. Adjusting the cleaning along …
… the concentration of TN, and the concentration and quality of DOC, in small boreal lakes are affected by clear-cutting and are changing with the age of the forest stand. Thus, highest concentrations and more bioavailable carbon compounds are found in clear-cut lakes where …
… of renewable energy has led to an increased demand of bioenergy e.g. forest biomass. However, there are concerns that removal of biomass will lead to decreased base cation concentrations in the soils and acidification of streams. In order to find in which types of landscape …
effekter av olika nivå på skogsskötselintensitet
En landsomfattande försökserie anlades mellan 1984 - 1988 med 15 försöksblock i Sverige. Syftet var att studera den totala effekten på virkesproduktionen av tre olika intensiva skogsskötselalternativ. Inom varje block upprättades en extensiv behandling som innebar att ingen …
