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.
2000
Forfattere
Sverre Kobro Ann Elin Teksdal Arild AndersenSammendrag
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Sammendrag
Coastal spruce forests of central Norway harbour a unique assemblage of epiphytic lichens and are given high priority with respect to conservation of biodiversity. To assess the historical impact of logging during the last 100-150 yrs, 31 remnant stands were studied by means of tree-ring analysis of 2199 trees and the decay stage of 1605 stumps. No stands had been clear-cut, but all had been selectively logged at least twice during the last 150 yrs. Total harvested timber volurne ranged from 65 to 409 m3ha-1 (31-124 % of present-day standing volume) and the selective logging kept standing volume low (40-200 m3ha-1) during 1890-1930. Present-day stand characteristics were strongly correlated with site productivity and topographic position within the ravine valleys. Low amounts of dead wood at sites with high historical logging activity was the only consistent relationship found after covariance of site productivity, topographic position and deciduous trees were taken into account. The results indicate that old-growth stand characteristics, such as reversed J-shaped age distributions and dead wood in advanced decay ciasses, can be obtained 100-150 yrs after intensive selective logging.
Forfattere
Sigmund Hågvar Einar EdsbergSammendrag
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Sammendrag
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Forfattere
Bent Braskerud Helge Lundekvam Tore KrogstadSammendrag
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Forfattere
Dag Fjeld Leif Egil Hem Tom Roar EikebrokkSammendrag
This study examines the role of forest operations strategies in sector development for Norway's fjord region. The paper starts with an examination of forest owner attitudes and perceptions in relation to their harvesting behaviour, use of contractor harvesting and road net extension. The influence of forest owner decisions, contractor mechanisation and road net extension standards on operational efficiency is examined in a simple deterministic model of the regional wood chain. Average wood procurement costs are calculated for increasing sector capacity. Direct and indirect harvesting costs are also followed throughout this development.
Sammendrag
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Forfattere
Per Otto Flæte Olav Albert Høibø Frode Fjærtoft Tom-Nils NilsenSammendrag
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Forfattere
Helge Lundekvam Per-Ivar VåjeSammendrag
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Forfattere
Svein Ole BorgenSammendrag
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