The ecoregion's wide elevational range results in several forest zones.
Medium elevations At medium elevations the mixed deciduous forests of
Quercus cerris,
Quercus pubescens,
Quercus frainetto,
sweet chestnut (
Castanea sativa), and
Ostrya carpinifolia predominate.
High elevations At high elevations there is a north–south slopes gradient of plant communities: •
South-facing plant communities: On south-facing slopes with cold and dry climate
European black pine (
Pinus nigra subsp.
larico) is the dominant species.
Pinus nigra subsp.
larico is also found on
Mount Etna up to the timberline along with the Etna birch (
Betula aetniensis).
Pinus heldreichii leucodermis is found only
Pollino Mountains. •
North-facing plant communities: On north-facing slopes Silver fir (
Abies alba) and
European beech (
Fagus sylvatica) mix with
Pinus nigra subsp.
larico. Relict stands of the endemic Nebrodi fir (
Abies nebrodensis) appear in the
Madonie Mountains. The Etna summits is characterized by a shrub community of
Astragalus siculus,
Berberis aetnensis,
Juniperus communis alpina and the Etna tree-broom (
Genista aetnensis). ==Fauna==