Arne Steffenrem
Research Scientist
(+47) 916 70 420
arne.steffenrem@nibio.no
Place
Steinkjer
Visiting address
Innocamp Steinkjer, Skolegata 22, 7713 Steinkjer
Authors
David Chludil Jaroslav Čepl Arne Steffenrem Jan Stejskal Christi Sagariya Torsten Pook Silvio Schueler Jiří Korecký Curt Almqvist Debojyoti Chakraborty Mats Berlin Milan LstibůrekAbstract
No abstract has been registered
Authors
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 SchuelerAbstract
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.
Abstract
Genetic variation and performance of up to 40-year-old Norway spruce (Picea abies (L.) Karst.) families from half-diallel crosses made in natural populations where studied, and the results were compared with results from nursery test of seedlings (1-2 years from seed) and short-term farm-field tests at 6-10 years from seed. The diallel analyses revealed significant levels of additive genetic variance for growth and phenology traits. The non-additive genetic variance was generally small to moderate. Strong genetic correlations for growth performance were found between the short-term and long-term trials but not between the nursery and long-term trials. Similarly, genetic correlations for phenology traits were strong between short-term trials and long-term trials, whereas the nursery tests generally did not predict phenology at older age well. The findings indicate that early selection for growth and adaptive traits based on short-term trials is effective for improvement of long-term performance in field if the test site is not outside the normal range of deployment of the reproductive material.