Kategori: Skog

Climate change – are forest trees adaptive?

Mechanisms The most basic mechanism for adaptation is selection. Generations of trees are genetically shaped by climate and other environmental conditions during the course of time, favouring some genes and discarding others. Thus, tree populations occupying different environmental habitats usually...

Läs hela artikeln

First Global Plan of Action for Forest Genetic Resources

The full article can be read at fao.org.

Läs hela artikeln

Conservation of genetic variation

– In habitat protection areas, forest trees are protected in their natural environment. The new strategy emphasizes that these protected areas from now on also include the conservation of genetic variation, says Sanna Black-Samuelsson, forest geneticist at the Swedish Forest...

Läs hela artikeln

Exotic tree species in Norwegian forestry – experiences with new method for risk assessment

In June 2012 the Norwegian Biodiversity Information Centre launched the Black list which is a risk assessment of introduced species. We will here briefly review the method used in the assessment and some experiences with risk assessments of introduced forest...

Läs hela artikeln

Wood quality after ash dieback

Healthy trees are an important resource for ensuring local regeneration of ash, and for the long-term work concerning preservation and breeding of healthy ash stands. Mapping of healty ash trees has been initialized in Denmark this year, in order to...

Läs hela artikeln

Nutrient loading helps Lutz seedling establishment in Iceland

Forestry in Iceland increased dramatically during the years 1990 – 2007, counting more than 5 million seedlings per year after 2003. With increased afforestation the surveillance of new plantings has increased and many of those have revealed high mortality of...

Läs hela artikeln

The beech in Norway – a late immigrant or an early introduction?

The beech (Fagus sylvatica) in Norway established in 500 and 1000 AD and is mainly distributed in two distinct areas – in Vestfold, eastern Norway, and at Seim in western Norway north of Bergen. As these populations are isolated from...

Läs hela artikeln

Improving the quality of direct seeding

Direct seeding is used mainly for Scots pine and the regeneration results are mostly good; especially compared to natural regeneration. Looking at the results from the seed consumption point of view (seedlings per sown germinable seeds), the outcome in direct...

Läs hela artikeln

New posters about forest trees

The posters are loaded with interesting and easily understood information about the use of trees and the importance of their genetic variation. The posters are made in cooperation with the Norwegian Centre for Science Education. They are in Norwegian, and...

Läs hela artikeln

Who owns the genes of forest trees?

In the Nordic region we are used to a simple and non-bureaucratic exchange of forest genetic resources between countries. This valuable exchange secures access to seeds and breeding material. The report ”Seeking appropriate legislation regulating access and exclusive rights to...

Läs hela artikeln