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Close-to-Nature continuous cover forestry Dr Jurij Diaci, Slovenia
1. Close-to-Nature Forestry: linking ecological, economical and social values by Jurij Diaci Biotechnical Faculty University of Ljubljana, Slovenia Department for Forestry and Renewable Forest Resources
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4. Landslides and erosion in Japan and intensive reforestations 1. Origins of close-to-nature silviculture
8. - huge natural interconnected forest - high species diversity due to glacial refugia - many umbrella species (e.g. bear, lynx, wolf, peregrine falcon) - many old-growth forests
9. Selection mixed silver fir beech forests on Zlatibor (Srbija) Selection forests as a tradition within whole Dinaric Mountains
10. F. de Liocourt : De l’amenagement des sapinières. Bulletin trimestriel, Société forestière de Franche-Comté et Belfort, juillet 1898, pp. 396 – 409. Henry Biolley (1858 -1939) Adolphe Gurnaud (1825 -1896) Source: J-Ph. Schütz ?
14. Right: primeval forest Ravna gora (SI) in 2001: wind throw gap from 1983 Left: s mall-scale gap disturbance in primeval forest Rajhenav (SI) in 1998
15. M ajor disturbance pattern is endogenous small scale disturbance (< 1000 m2) with sporadic windthrow . Light remains sparse!!! 2. Natural processes and CTN silviculture Old-growth Trdinov vrh (SI) - 1999
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17. Clear-cut management in Oregon (USA) : erosion & site degradation, water management, wildlife, social functions
18. C lear-cut forest in the Olympic Peninsula, Washington. If you were driving, you’d probably not notice the clearing at all! And that, my friend, is the pictorial definition of a façade. Landscape “make-up”
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20. evenaged forest State owned selection forests in the Dinaric region 3. How does CTN silviculture operate? selection forest
21. The regeneration is introduced under slightly opened canopies Irregular shelterwood system
22. The regeneration is introduced under slightly opened canopies Formation and gradual extension of gaps Irregular shelterwood system
23. 1960' - development of "free style" silvicultural system by 1968 - the trilogy of Slovenian nature-based silvicultural systems was completed and published
24. S c hematic presentation of the “ free style ” silvicultural system: (A) gradual conversion of spruce plantation to mixed uneven-aged forest, (B) transformation of large-scale regeneration to uneven-sized forest , (C) conversion of coppices (with standards) to regular forest INITIAL CONDITION AFTER 30 YEARS AFTER 60 YEARS
27. Dauerwald – CC forest on a steep slope in Swiss Jura. Regular felling every 10 years. Non-managed stand for the last 50 years, than heavier felling in 1999.
28. Sycamore maple of excellent quality in a CC forest. Tree as a goal and means of production. Felling age is defined individually. Norway spruce of excellent quality in CC forest Lenzburg, CH.