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.
1996
Forfattere
Nina JohansenSammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn ØklandSammendrag
A high trapping efficiency was found both for window traps and trunk-window traps, while the efficiency of extraction cylinders was low. Trunk-window traps are suitable for comparison of different substrates within the same forest environment, while comparative studies of different forest environments are more difficult, due to baiting effects. Window trap captures are more suitable for comparing different forest environments, but are related to ecological conditions over wide areas, and are almost unaffected by substrate conditions in the near surroundings of the traps
Sammendrag
There is a growing awareness to preserve the biodiversity in the forest ecosystems. A first step in biodiversity research is to find out what species really are found in the forest, using the scientific tool named taxonomy. Still there are species-rich groups of forest insects which have been poorly researched, and which include several unclearities concerning the species identities. One such group is the free-developing gall midges connected with litter, dead wood and fungi in the ground layer of the forest. This papers intends to improve the taxonomy of one genus in this group - Anaretella (Enderlein 1911), including the description of two new species and a key to the current species within the Holarctic region
Forfattere
Bjørn ØklandSammendrag
The relationship between the mycetophilid fauna and a set of environmental variables was studied in spruce forests of southeastern Norway. At the stand level, the continuous presence of wood in all decay stages combined with a tree cover appeared to be a major factor for increasing the species richness of mycetophilids. However, the spatial representation of suitable stands in the landscape seems to be particularly important, since the % area of oldgrowth in the surrounding 100 km showed the strongest influence on both species richness and abundance within individual species. The present findings indicate that conservation of a species-rich mycetophilid fauna requires networks of stands within dispersal distances. A reserve network in southern Norway should give special priority to little disturbed forests in the more remote sub-montane areas, since they appear to be very species-rich, and since their strong populations may provide a long-term viability of many mycetophilid species.
1995
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn ØklandSammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn ØklandSammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn ØklandSammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn ØklandSammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn ØklandSammendrag
Det er ikke registrert sammendrag