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.
2015
Forfattere
Oskar PuschmannSammendrag
Det er ikke registrert sammendrag
Sammendrag
Lokkrust kan væra problematisk i vanlig gran (Picea abies). Soppen finnes i Europa, Asia og Mellom-Amerika (Den dominikanske Republikk). I USA er denne skadegjøreren regulert som karanteneorganisme.
Forfattere
Rafael Bermúdez Yuanyuan Feng Michael Roleda Avery O. Tatters David A. Hutchins Thomas Larsen Philip W. Boyd Catriona L. Hurd Ulf Riebesell Monika WinderSammendrag
Det er ikke registrert sammendrag
Forfattere
Marianne StenrødSammendrag
Det er ikke registrert sammendrag
Forfattere
Magnus Lund Jarle W. Bjerke Bert G. Drake Ola Engelsen Georg Heinrich Hansen Frans-Jan W. Parmentier Thomas Powell Hanna Marika Silvennoinen Matteo Sottocornola Hans Tømmervik Simon Weldon Daniel RasseSammendrag
Northern peatlands hold large amounts of organic carbon (C) in their soils and are as such important in a climate change context. Blanket bogs, i.e. nutrient-poor peatlands restricted to maritime climates, may be extra vulnerable to global warming since they require a positive water balance to sustain their moss dominated vegetation andCsink functioning. This study presents a 4.5 year record of land– atmosphere carbon dioxide (CO2) exchange from the Andøya blanket bog in northern Norway. Compared with other peatlands, the Andøya peatland exhibited low flux rates, related to the low productivity of the dominating moss and lichen communities and the maritime settings that attenuated seasonal temperature variations. It was observed that under periods of high vapour pressure deficit, net ecosystem exchange was reduced, which was mainly caused by a decrease in gross primary production. However, no persistent effects of dry conditions on theCO2 exchange dynamics were observed, indicating that under present conditions and within the range of observed meteorological conditions the Andøya blanket bog retained its Cuptake function. Continued monitoring of these ecosystem types is essential in order to detect possible effects of a changing climate. peatland, carbon, blanket bog, eddy covariance, climate change, net ecosystem exchange
Forfattere
Torstein KvammeSammendrag
Det er ikke registrert sammendrag
Forfattere
Atle HaugeSammendrag
Det er ikke registrert sammendrag
Forfattere
Bruce Talbot Karl Stampfer Rien VisserSammendrag
An assessment of the benefits of a fully integrated yarder-processor was made against the alternative of splitting the yarding and processing functions onto two base machines. The effect of productivity rates, specific costs, and crew sizes on the relative performance of each working configuration was investigated. The systems analysis showed that for the integrated yarder machine, a two-man crew was considerably cheaper than a three-man crew at all yarding distances, although the difference became less pronounced with increasing mean tree volumes. The single integrated machine with a 2-man crew was cheaper than the modelled 2-machine system at medium and longer extraction distances, as the processor base machine in the 2-machine systems incurred a considerable cost penalty in waiting idly for the yarder. At shorter distances (75 m) the 2-machine system was cheapest, but became less competitive with increasing mean tree volume. For mid-sized trees (0.38 m3) on a medium corridor length of 150 m, overall system productivity rates ranged from 5.2 m3 per productive system hour (PSH) for the single machine system to 9.4 PSH−1 for the 2-machine system, although the specific net costs were almost identical at 31.5 € m−3. A sensitivity analysis showed that reduced labour costs would promote use of the 2-machine system, suggesting that the optimum system configuration would be country specific. Despite being marginally more costly in small trees at short corridor lengths (75 m), the single fully-integrated machine was considered the working configuration of choice under Norwegian conditions.
Forfattere
John Marshall BrydenSammendrag
Det er ikke registrert sammendrag
Forfattere
Margarita Novoa GarridoSammendrag
Det er ikke registrert sammendrag