DOLOMITES - Annexes 2-8 - Provincia di Udine

NOMINATION OF THE DOLOMITES FOR INSCRIPTION ON THE WORLD NATURAL HERITAGE LIST UNESCO
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Zones of detritus and rocky walls in Val Sasso Vecchio/Altensteintal
(Gruppo di Cima Una/Einser – Dolomiti di Sesto/Sexner Dolomiten –Alto Adige/Südtirol).
the vegetation
Approximately 2,400 species represent the flora in the Dolomite area. In the absence of an organic
body of synthesis, we can consider that the plant life in the Dolomite area is represented by some
150 plant associations, which can be grouped into an increasingly smaller number of alliances (e.g.
Tilio-Acerion), orders (e.g. Vaccinio-Piceetalia) and classes (e.g. Salicetea herbaceae). In the description
of the plant landscape of a territory, the altitude belt differentiation approach is still quite commonly
used. Adige/Südtirol).
Altitude belts
According to the outline proposed by Pignatti, there are 4 belts (not counting the Mediterranean
belt). The Middle European belt includes the valley floor and the warm submontane areas which are
usually characterized by horn-beam woods and oaks. The Sub-Atlantic belt includes the wooded areas
of the cooler slopes of the submontane horizon and nearly all the slopes on the montane horizon and,
in the outermost Dolomite area, also the altimontane area. These comprise exclusively beech woods
or mixed beech and silver fir woods, as the spruce population is rather marginal. Also several ravine
woods, plentiful in noble broadleaf trees (maple, linden, witch elm and ash) and yew trees are typical
of this belt where the rainfall is usually high and well distributed. The Boreal belt, which corresponds
to the altimontane and sub-Alpine zones, includes the evergreen woods and the sub-Alpine shrubs:
red fir woods, mainly, and firs that thrive in acidic soil, larch woods, and mixed larch and Swiss stone
pine (Swiss stone pine are rare and limited to the more continental areas, i.e. Bolzano/Bozen). The