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.
2018
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Kapping og beskjæring av tretopper langs kraftlinjer med sag fra helikopter reduserer risikoen for trefall på kraftlinja og kan være et kostnadseffektivt tiltak med få ulemper for skogeier. Topping eller kvisting med helikopter gir mindre sjanse for vindfall, toppbrekk og snøbøy, dels ved at trærne får mindre vindfang og mindre snølast, og dels ved at vektarmen som kraften virker på blir kortere.
Forfattere
Björn RingselleSammendrag
Det er ikke registrert sammendrag
Forfattere
Andreas Treu Katrin Zimmer Christian Brischke Erik Larnøy Lone Ross Foued Aloui Simon M Cragg Per Otto Flæte Miha Humar Mats Westin Luisa M. S. Borges John WilliamsSammendrag
Det er ikke registrert sammendrag
Forfattere
Mekjell MelandSammendrag
Det er ikke registrert sammendrag
Forfattere
Jarle W. Bjerke Ellen Elverland Laura Jaakola Leidulf Lund Bogdan Zagajewski Zbigniew Bochenek Andrzej Kłos Hans TømmervikSammendrag
Climate change-induced snow thaw and subsequent accumulation of ice on the ground is a potential, major threat to snow-dominated ecosystems. While impacts of ground-ice on arctic wildlife are well explored, the impacts on tundra vegetation is far from understood. We therefore tested the vulnerability of two high-arctic plants, the prostrate shrub Salix polaris and the graminoid Luzula confusa, to ice encasement for 60 days under full environmental control. Both species were tolerant, showing only minor negative responses to the treatment. Subsequent exposure to simulated late spring frost increased the amount of damaged tissue, particularly in S. polaris, compared to the pre-frost situation. Wilting shoot tips of S. polaris increased nearly tenfold, while the proportion of wilted leaves of L. confusa increased by 15%. During recovery, damaged plants of S. polaris responded by extensive compensatory growth of new leaves that were much smaller than leaves of non-damaged shoots. The results suggest that S. polaris and L. confusa are rather tolerant to arctic winter-spring climate change, and this may be part of the reason for their wide distribution range and abundance in the Arctic.
Forfattere
Jens Peter Skovsgaard Jacob Johan Mohr Markmann Giulia Attocchi Bruce TalbotSammendrag
The objective of this study was to establish an operational model of productive work time per tree (work efficiency) for high-pruning of young European beech and pedunculate oak depending on tree species, pruning height, branch characteristics, pole saw type and operator. The final model included all of these independent variables with branch characteristics specified in terms of number of live branches and cross-sectional area of the thickest branch at the cut. Work time increased with increasing values of each of the three numeric variables. For a given pruning height the size of the largest branch was for all practical purposes more influential than the number of live branches. Beech took 28% longer to prune than oak. The German Ergo-Schnitt saw was 21% slower than the Japanese Silky Hayauchi saw. The variation in worker performance within our study was larger than that attributed to tree species and pruning equipment.
Sammendrag
High-throughput sequencing for plant virus diagnosis in Norway
Forfattere
Hege UlfengSammendrag
Det er ikke registrert sammendrag
Forfattere
Ellen Johanne SvalheimSammendrag
Det er ikke registrert sammendrag