Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2011
Sammendrag
Abstract Introductions of the pine wood nematode (PWN), which causes Pine Wilt Disease (PWD), have devastating effects on pine forests in regions with susceptible host trees under suitable climate conditions. Norwegian authorities have proposed a contingency plan if PWN is detected in Norway. We compare the costs of implementing this plan with the costs of further spread and damage of PWN under two climate change scenarios: present and the most likely future climate. With the present climate, PWD will not occur in Norway. Under climatic change, the cost of PWD damage is approximately 0.078- 0.157 million NOK (0.01-0.02 million Euros) estimated as net present value with 2 and 4% p.a. discount rate. In contrast, the corresponding costs of implementing the suggested contingency plan will be 1.7-2.2 billion NOK (0.2-0.25 billion Euros). These costs are caused by reduced income from industrial timber production and the costs of the eradication measures. Costs related to reduced recreation or biodiversity are expected to be very high, but are not included in the above estimates. Many of the factors in the analysis are burdened with high uncertainty, but sensitivity analyses indicate that the results are rather robust even for drastic changes in assumptions. The results suggest that there is a need to revise the current PWN contingency plan in Norway. Keywords: Bioeconomics, boreal forest damage, Bursaphelenchus xylophilus, climate change, impact assessment, stochastic modelling.
Sammendrag
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Sammendrag
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Forfattere
Sara Alva-Lizarraga Karen Refsgaard Thomas G. JohnsonSammendrag
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Redaktører
Sjur Baardsen John Marshall Bryden Karen Refsgaard Kjersti Nordskog Katja Strøm Cappelen Helene Lie Arezoo SoltaniSammendrag
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Sammendrag
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Forfattere
Tibor Ferenczi Kenneth J. Thomson John Marshall BrydenSammendrag
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Forfattere
Johannes BreidenbachSammendrag
Digital aerial images over Vestfold county were acquired by TerraTec in summer 2007 with a Vexcel UltraCamX sensor. The flying height above-ground was approximately 2800-3000 m which resulted in images of approximately 1880x2880 m size. The images were acquired in north-south oriented flight strips with a 20% side and 60% within-strip overlap. Panchromatic image data were acquired in 20 cm ground sampling distance (GSD). Near infrared, red, green and blue image bands were acquired in 60 cm GSD but were pansharpened to a 20 cm pixel size by the data vendor. The original radiometric resolution of the images (12 bit) was resampled to 8 bit for archival storage. The plane location and orientation during image acquisition were logged using a GPS and an inertial navigation system (INS). To increase the accuracy of the external orientation, an aerial triangulation was performed based on 34 ground control points using the software Match-AT.
Sammendrag
Agriculture contributes a significant portion of the nutrient supply to the environment, being to a large degree responsible for the eutrophication of inland waters and coastal zones. Agricultural practices, climatic conditions, topography and geological conditions are important factors in determining these losses. However, also hydrological flow processes and pathways play an important role in the nutrient and soil loss processes. This chapter presents the results of a comparison of the hydrology in three catchments, two of which are located in Norway and one in Poland.
Forfattere
John Marshall Bryden Sjur Baardsen Katja Strøm Cappelen Kjersti Nordskog Karen RefsgaardSammendrag
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