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.
2017
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Ash dieback, caused by the ascomycete Hymenoscyphus fraxineus, was first observed in the eastern and southernmost Norway in 2008. Based on the age of stem bark lesions, it was concluded that the fungus had arrived to the region no later than 2006. Since 2008 the annual spread of the disease northwards along the west coast of Norway has been monitored. The registration was done each year during early summer around a disease frontier recorded in the previous year. The occurrence of necrotic bark lesions in the previous-year shoots and dieback of these shoots, and isolation of H. fraxineus from the discoloured wood associated with necrotic bark lesions were used as signs of ash dieback. These records indicate an annual spread of ash dieback in the range between 25 km and 78 km, and a mean annual spread of 51 km. The cause of the spread is discussed.
Sammendrag
Askeskuddsjuke har spredd seg med rekordfart i Europa og i Norge. Ask (Fraxinus excelsior) er meget sensitiv for denne nye sjukdommen. De aller fleste områder i Europa med dette treslaget er nå infisert med sekksporesoppen askeskuddbeger (Hymenoscyphus fraxineus) som forårsaker sjukdommen. I Norge ble askeskuddsjuke første gang registrert i 2008 og allerede da ble den funnet over store deler av Østlandet og Sørlandet. Deretter har askeskuddsjuke spredd seg nordover på Vestlandet i gjennomsnitt 51 km per år. I 2016 ble det nordligste funnet registrert i Aure kommune nær grensa til Trøndelag.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Jurga Motiejunaite Mark R. Bakker Isabella Børja Ivano Brunner Tanja Mrak Edda Sigurdis Oddsdottir Brynhildur BjarnadottirSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
The ongoing climate change may have a distinct effect on Norway spruce growth, one of the most important tree species in European forest management. Therefore, the understanding and assessment of climate-growth relationship can help to reveal relevant patterns in temporal variability that may result in lower tree vitality and decline. The main objective of our study was to evaluate the long-term climate-growth variability of Norway spruce in south-eastern Norway, at the northern edge of the temperate zone. We sampled in total 270 dominant and co-dominant trees from 18 plots in south-eastern Norway. We analysed stem cores and evaluated crown condition parameters to assess the retrospective tree growth and vitality. Despite considerable differences in the crown parameters, high similarity among tree-ring width (TRW) series allowed compiling the regional tree-ring width chronology. Correlations between TRW and climate parameters showed temporal instability in their relationship during the period 1915–2012. While we did not detect any significant relationships between TRW and climate parameters in the first half of the study period (1915–1963), a significant correlation between TRW and spring precipitation was observed for the period 1964–2012. This shift appeared concurrent with temperatures reaching above-average values compared to the average of the climate normal period 1961–1990.
Forfattere
Isabella BørjaSammendrag
Det er ikke registrert sammendrag
Forfattere
Isabella BørjaSammendrag
Det er ikke registrert sammendrag