Fride Høistad Schei
Forsker
Biografi
Jeg er økolog med en spesiell interesse for hvordan naturlige og menneskeskapte prosesser påvirker arter og økosystemer over tid. Mitt nåværende hovedfokus er skogsøkologi og hvordan tilstedeværelsen av arter i skog påvirkes av viktige faktorer som arealbruk, fremmede arter, sykdom og klimaendringer.
Nøkkelord: Bevaringsbiologi, Langtidsendringer, Lukkede hogster, Overvåkning av arter, Skogøkologi og Skogsertifisering.
Sammendrag
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Forfattere
Fride Høistad Schei Mie Prik Arnberg John-Arvid Grytnes Maren Stien Johansen Jørund Johansen Anna Birgitte Milford Anders Røynstrand Mari Mette TollefsrudSammendrag
Climate change and human activities have accelerated the spread of non-native species, including forest pests and pathogens, significantly contributing to global biodiversity loss. Pathogens pose a significant threat to forest ecosystems due to a lack of coevolution with native hosts, resulting in ineffective defence mechanisms and severe consequences for the affected tree species. Ash dieback, caused by the fungus Hymenoscyphus fraxineus, is a relatively new invasive forest pathogen threatening ash (Fraxinus excelsior) with mortality rates in northern Europe reaching up to 80 %. The loss of ash due to dieback has severe ecological implications, potentially leading to an extinction cascade as ash provides crucial habitats and resources for many organisms. Despite this, the consequences of ash dieback on associated communities are largely unknown. To address this, we analysed changes in species richness, vegetation structure, and composition in 82 permanent vegetation plots across 23 Norwegian woodlands. We compared data collected before and 10–14 years after the emergence of ash dieback. In these woodlands, ash significantly declined in cover, leading to changes in tree species composition and facilitating the establishment of other woody tree species like hazel (Corylus avellana) and the invasive species sycamore (Acer pseudoplatanus). Despite these changes in the tree species composition, no significant alterations were observed in the understory plant community, indicating a degree of ecosystem resilience or a lagging community response. At this point, and with our focus on the vascular plants, we do not find support for cascading effects due to ash dieback. However, our findings demonstrate that one invasive species is facilitating the expansion of another, raising concerns about potential ecological imbalance and cascading effects in the future.
Sammendrag
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Divisjon for skog og utmark
Lukkede hogster: Konsekvenser for produksjon, økonomi og biomangfold
Hovedmålet til prosjektet er å bygge kunnskap og kompetanse om hvordan en omlegging av norsk skogbruk, fra flatehogst til mer bruk av lukkede hogster, vil påvirke produksjon, økonomi og biologisk mangfold.
Divisjon for skog og utmark
SFI SmartForest: Bringing Industry 4.0 to the Norwegian forest sector
SmartForest will position the Norwegian forest sector at the forefront of digitalization resulting in large efficiency gains in the forest sector, increased production, reduced environmental impacts, and significant climate benefits. SmartForest will result in a series of innovations and be the catalyst for an internationally competitive forest-tech sector in Norway. The fundamental components for achieving this are in place; a unified and committed forest sector, a leading R&D environment, and a series of progressive data and technology companies.