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  • 1.
    Jonsson, Sofia
    Linköping University, Department of Physics, Chemistry and Biology.
    Naturhänsyn på slutavverkade hyggen i Östergötlands län.2011Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    95% of the productive forest land in Sweden are now being exploited for forestry. The new Forestry Act of 1993 equate the goal of production and the environmental goal which means that the objective for forestry is a sustainable yield, while the biological diversity must be preserved. Recent years results from the inventories of the Board of Forestry show declining trends in how nature conservation aspects taken into consideration at the felling sites.The aim of this study is to investigate what happends with the nature consideration taken at felling sites in the long run. 20 final fellings in the county of Östergötland were re-inventoried 7-9 years after final felling. These felling sites had previously been inventoried before final felling (P0) and one year after final felling (P1) in the inventory Polytax by the Board of Forestry. On 18 of 20 felling sites nature consideration had decreased significantly from P1 inventory to re-inventory. Retention trees had declined the most, 7.9% of the total volume of retention trees was gone. Taking conservation in to consideration at final felling sites by retenetion of trees and habitats with high conservation value is an important step in preserving biodiversity and increasing the chances of survival for the species considered sensitive to forestry. In order to improve the consideration of nature and thereby increase the chances of species survival a functional follow-up of conservation efforts at the felling sites is required.

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