Kategori: Skog

Tree breeding and seed source deployment under climate change

Also, pests and diseases may be favoured, creating a greater threat to tree health. Even though trees are long lived and generally adapted to varying conditions over a life cycle, new climatic conditions call for phenotypic matching of growth rhythm...

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Different angles to trees in a changing climate

Text: Tor Myking and Kjersti Bakkebø Fjellstad/NordGen Forest The conference Genetic resources for food and agriculture in a changing climate at Lillehammer on 27-29 January,  organised by NordGen, included three keynote presentations specifically on forest trees. Antoine Kremer (INRA, France) commenced...

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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...

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First Global Plan of Action for Forest Genetic Resources

The full article can be read at fao.org.

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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...

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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...

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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...

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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...

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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...

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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...

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