Tore Skrøppa
Seniorforsker (pensjonistavtale)
Forfattere
Debojyoti Chakraborty Albert Ciceu Dalibor Ballian Marta Benito Garzón Andreas Bolte Gregor Bozic Rafael Buchacher Jaroslav Čepl Eva Cremer Alexis Ducousso Julian Gaviria Jan Peter George André Hardtke Mladen Ivankovic Marcin Klisz Jan Kowalczyk Antoine Kremer Milan Lstibůrek Roman Longauer Georgeta Mihai László Nagy Krasimira Petkova Emil Popov Randolf Schirmer Tore Skrøppa Thomas Solvin Arne Steffenrem Jan Stejskal Srdjan Stojnic Katharina Volmer Silvio SchuelerSammendrag
Climate change threatens the role of European forests as a long-term carbon sink. Assisted migration aims to increase the resilience of forest tree populations to climate change, using species-specific climatic limits and local adaptations through transferring seed provenances. We modelled assisted migration scenarios for seven main European tree species and analysed the effects of species and seed provenance selection, accounting for environmental and genetic variations, on the annual above-ground carbon sink of regrowing juvenile forests. To increase forest resilience, coniferous trees need to be replaced by deciduous species over large parts of their distribution. If local seed provenances are used, this would result in a decrease of the current carbon sink (40 TgC yr−1) by 34–41% by 2061–2080. However, if seed provenances adapted to future climates are used, current sinks could be maintained or even increased to 48–60 TgC yr−1.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Female flowering and cone production took place in three Norway spruce progeny tests at ages 17 and 20 years, each planted with full-sib families from a half diallel. The number of cones on individual trees were scored in five classes. More than 50 % of the trees produced cones, and a considerable variation was found among families for the ability to produce cones (precocity) and for the number of clones scored in classes (fruitfulness). Both traits were strongly related to tree heights and diameters at the individual and at the family level. In general, tall trees produced the highest number of cones. However, some families produced many cones even if their average heights were low. In two of the half diallels, estimates of GCA variance components for the number of cones produced had twice the value of the SCA component, indicating additive genetic inheritance of cone production. Heritability estimates of cone scores were 0.10, 0.17 and 0.23, and the genetic correlations between cone production and tree heights were 0.40, 0.50 and 0.35 in the three half-diallels, respectively.
Divisjon for skog og utmark
FORGENRES: Management of forest genetic resources under climate change
Current forest tree gene resource management, with concurrent selective breeding and geneconservation, are long-term endeavors. Hundreds of parents and thousands of offspring are being tested on multiple locations, requiring substantial resources, elaborate logistics, and sustained organizational commitment.
Divisjon for skog og utmark
OptFORESTS - Harnessing forest genetic diversity for increasing options in the face of environmental and societal challenges
OptFORESTS har som overordnet mål å bidra til bevaring og bruk av skogtregenetiske ressurser i Europa og er en oppfølging av ambisjonen i EUs grønne giv (Green Deal) om å plante 3 milliarder trær i EU innen 2030. Skogplantingen vil øke karbonbindingen og tilføre samfunnet mer trevirke som en sentral del av grønn omstilling. OptFORESTS rolle er å utvikle både skogfaglig og sosiokulturell kunnskap for å kunne ta flere treslag i bruk i skogbruket, bidra til restaurering av skog og øke produksjonskapasiteten i skogplanteskolene i Europa. NIBIO er sammen med 18 andre institusjoner fra 15 land partner i dette prosjektet som går helt til 2027.