Biodiversity, carbon storage and dynamics of old northern forests

image of Biodiversity, carbon storage and dynamics of old northern forests

Forests play a key role in the global climate system. The Nordic countries have extensive forests with large and growing tree biomass that captures substantial amounts of the greenhouse gas carbon dioxide. Nordic forests are also important for biodiversity, with complex ecosystems providing habitats for about half of all known native species and threatened species in Finland, Norway, and Sweden. Forests also supply the basis for the economically important forest sector. In this report we review current knowledge on the role of old forests in the carbon cycle, their natural dynamics and importance for biodiversity. Based on evidence in the literature, it is clear that old forests continue to accumulate carbon for a long time, well past the normal logging age. The carbon uptake of old forests represents an important co-benefit for the well-documented value of old forests for biodiversity.



Approach and methods

In this report we are primarily concerned with boreal and northern temperate (or nemoral) forests in Denmark, Finland, Norway, and Sweden. It follows that we have to a great extent drawn on studies performed on such forests in these countries or in nearby areas in northern Europe, northwest Russia or the Baltic states. However, we have also included relevant studies from other boreal or temperate forest areas, such as North America. Some wider studies, synthesizing information from a range of forest types, have also been consulted to set the results from boreal and temperate forests into perspective.


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