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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.

2005

Sammendrag

Dokumentet inneholder arealressurskart og statistikk over skogarealet i Sør-Odal kommune. Inventeringsmetoden er basert på Landsskogtakseringens prøveflater, Digitalt markslagskart (DMK) og satellittbilde. DMK brukes for å lage ei skogmaske for kommunen og et bonitetskart. Bildet kalibreres mot prøveflatene og deretter blir alle bildepikslene innenfor området skogmaska dekker sammenlignet med alle prøveflatene i et stort geografisk område som er mye større enn kommunen. For hver piksel blir de mest like prøveflatene plukket ut; dette blir gjort for alle pikslene i skogmaska. Deretter kan både kart og statistikk beregnes basert på denne informasjonen. Bruksområdene spenner fra rapportering mot internasjonale organer som OECD og FN, forskning og undervisning til forvaltning av skogressursene i kommuner og fylker. SAT-SKOG kommunerapport

Sammendrag

Det presenteres resultater fra et forsøk med fem sorter (Asterix, Beate, Folva, Peik og Saturna) dyrket på tre ulike lokaliteter. Potetene ble høstet henholdsvis på grønt ris og 14 dager etter nedsviing. Potetene ble analysert for innhold av sukrose, glukose og fruktose rett etter høsting og deretter testet med sensorisk analyse av kokte poteter etter 3 mnd. Det var i hovedsak smaksforskjeller og forskjeller i sukkerinnhold mellom steder og mellom sorter. For Beate og Folva var det positiv korrelasjon mellom sensorisk bestemt søthet og de to sukkerartene fruktose og glukose.

Sammendrag

The genus Leptographium was described in 1927 and currently includes 48 species, with L. lundbergii as the type species. In recent years, the taxonomic status of L. lundbergii has not been uniformly agreed upon and it has been the topic of considerable debate. The problem was compounded by the absence of a type specimen, and the species was epitypified at a later stage. Unfortunately, the whereabouts of the epitype is now unknown. In 1983, Wingfield & Marasas described L. truncatum, which is morphologically similar to L. lundbergii. Based on DNA comparisons and similarities in their morphology, this fungus was reduced to synonymy with L. lundbergii. The loss of the type specimen as well as variation in the morphology of strains identified as L. lundbergii prompted us to re-examine the taxonomic status of this species. A number of strains from various geographic areas were studied. These include a strain of L. lundbergii deposited at CBS by Melin in 1929 (CBS 352.29) as well as the ex-type strain of L. truncatum. The strains were compared based on morphology and comparison of multiple gene sequences. Three genes or genic regions, ITS2 and part of the 28S gene, partial â-tubulin and partial elongation factor 1-α were compared. Strains currently identified as L. lundbergii, represented a complex of species. Strains initially described as L. truncatum clustered separately from other L. lundbergii strains, could be distinguished morphologically and should be treated as a distinct taxon. L. lundbergii is provided with a new and expanded description based on a neotype designated for it. A third group was also identified as separate from the main L. lundbergii clade and had a distinct Hyalorhinocladiella-type anamorph, described here as H. pinicola sp.nov.

Sammendrag

Time since death and time since fall were estimated for hybrid spruce (Picea glauca (Moench) Voss Picea engelmannii Parry ex Engelm.) and subalpine fir (Abies lasiocarpa (Hook.) Nutt.) logs to quantify temporal changes in log decay and habitat quality in east-central British Columbia. We sampled 136 logs (72 spruce and 64 fir) for species, size, and morphological attributes and used dendroecological techniques to estimate year of death (n = 97) and fall (n = 122).Time since death and time since fall of spruce and fir were similar in decay classes 1 and 2; fir was older than spruce in more advanced stages of decay. Discriminant analysis based on time since fall correctly classified logs into four decay classes for 67% and 80% of spruce and fir, respectively.Function as wildlife habitat changed significantly as logs decayed. Logs served as elevated runways for approximately 15 years and then increased in value as habitat for invertebrates and insectivores as wood softened and vegetation established. Concealed spaces increased as the wood decomposed but decreased when logs collapsed.We conclude that decay classes represent biologically and statistically significant stages of log decomposition that are relevant to wildlife habitat and therefore provide a useful construct for model development and field interpretation.