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ZDRUŽBA ČRNEGA BORA IN MALEGA JESENA
Fraxino orni–Pinetum nigrae Martin-Bosse 1967
Združba porašča strma apnenčasta in dolomitna pobočja. Prevladuje vlažno in hladno alpsko podnebje s preko 2000 mm padavin letno in s povprečnimi letnimi temperaturami od 6 do 8° C. Uspeva v severozahodnem in severnem delu Slovenije. V teh sestojih so pogosti plazovi in vetrolomi. Tla so plitva in skeletna (litosol, rendzina) in podvržena eroziji. Diagnostična kombinacija rastlinskih vrst Združbo lahko obravnavamo kot potencialno naravno samo na ekstremnih rastiščih, medtem ko se na bolj ugodnih rastiščih v sukcesivnem razvoju razvije termofilni bukov gozd. Gozdovi imajo varovalni značaj. Drevje dosega le srednje dimenzije, višino do 20 m, s prsnim premerom do 40 cm. V preteklih letih sta bili opisani dve združbi, kjer dominira črni bor, in sicer združba črnega bora in vednozelenega šaša in črnega bora in alpskega volčina. Združbo črnega bora in malega jesena uvrščamo v zvezo Fraxino orni-Ostryion carpinifoliae. |
The association grows on steep calcareous and dolomite slopes. The humid and cold alpine climate has more than 2000 mm of rainfall per annum and an average annual temperature of 6o C. It is found in the north-western and northern part of Slovenia. In these stands, landslides and wind damage occur frequently. The soil is shallow and skeletal (lithic and rendzic Leptosol) and liable to erosion. Diagnostic combination of plant species The association can be considered potentially natural on extreme sites, while there is a successive development of thermophilous beech forest on more favourable sites. The forests have an important protective role. The trees only achieve medium dimensions with heights up to 20 meters and diameters at breast height up to 40 cm. Two associations dominated by Pinus nigra described in the recent years: Carici sempervirentis-Pinetum nigrae Accetto 1999 and Daphno alpinae-Pinetum nigrae Accetto 2001. The Fraxino orni–Pinetum nigrae is classified in the alliance Fraxino orni–Ostryion carpinifoliae. |
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