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.
1997
Forfattere
Knut SolbraaSammendrag
Det er ikke registrert sammendrag
Forfattere
Knut SolbraaSammendrag
Introduksjon til et avsnitt om lav funnet på Hirkjølen. Artikkelen omfatter også en artsliste.
Forfattere
Knut SolbraaSammendrag
Introduksjon til et kapittel om planter som er funnet i fjellskog på Hirkjølen. Artiklen inneholder også en liste over karplanter Introduction to a chapter dealing with plants found in mountain fores t at Hirkjølen, including a list of higher plants
Forfattere
Arild Vatn Lars R. Bakken Peter Botterweg Eirik Romstad Kjell Arne Brekke Øyvind Lone Tor RødsethSammendrag
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Redaktører
Petter NilsenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
We compared diversity of birds in 35 study plots of equal size (58 ha) and productivity in western Norway, ranging from pure native pine Pinus sylvestris forests (n = 7), through different mosaics of native pine forests and spruce Picea spp. plantations (n = 21), to pure spruce plantations (n = 7). Diversity was evaluated by means of species richness, diversity indices, relative abundance curves and rarefaction. The diversity indices appeared to be less suitable for our purpose. Species richness was higher in pine forest than in spruce forest. However, a peak in species richness was found in mosaic forest. For pooled samples (408 ha), 11 bird species recorded in pine forest were not found in spruce forest, seven species were found in spruce forest but not in pine forest, and seven species were confined to the medium mosaics of pine and spruce forest (on average 56% pine and 44% spruce). We argue that, when mixing two habitat types A and B, the ratio of these habitats that maximize avian diversity depends on the ratio of species confined to habitat A and B, as well as the number of species favoured by the mixture of A and B. Existing spruce plantations (13% of the area) in native pine forests of western Norway have reduced the diversity of birds locally, but increased the diversity of birds on the landscape and regional scale.
Forfattere
Jorunn Elisabeth Olsen Olavi Junttila Jarle Nilsen M. E. Eriksson Inger Martinussen Olaf Olsson Göran Sandberg Thomas MoritzSammendrag
Resultatene i arbeidet indikerer at den fotoperiodiske responsen hos tre kan være regulert av mengde PHYA genuttrykk, og at mengden av fytokrom A påvirker metabolismen av GAs (gibberelliner) og IAA (auxin).
Forfattere
Arild Vatn Lars R. Bakken Halstein Lundeby Eirik Romstad Per Kr. Rørstad Arild Vold Peter BotterwegSammendrag
This paper analyses a set of policy measures oriented towards reduc ing losses of nitrogen, phosphorus, and soil from agricultural land . An interdisciplinary modelling system- ECECMOD - is presented a nd a set of policy scenarios analysed. The analyses are oriented towards comparing the effects of input-oriented measures (fertilise r taxes) and policy measures directed towards more direct changes in the agronomic practices conducted on the farm. The effects on emission levels, abatement costs, and distributional effect s are documented. The trade-offs between precision and regulation costs are discussed.
Forfattere
Leif Jarle Asheim Lars Olav Eik Bjørn Nygård Arne MaurtvedtSammendrag
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