Title
North Adriatic-Istrian sessile oak forests (Quercus petraea) with Castanea sativa, with Sesleria autumnalis, Serratula tinctoria on flysch
Geographical distribution
Country/territory
West Slovenia; Croatia (not on the map)
Scientific names of main plant communities and their most common synonyms (with author citation)
Seslerio autumnalis-Quercetum petraeae Poldini 1982 (syn.: Seslerio-Ostryetum auct. istr. p.p. non Horvat & Horvatić 1950).
Structural feature of the main community(ies) (layers, life-forms, etc.)
Two- to three-layered forests with dominant sessile oak and a well developed herb layer with thermophilous elements.
Dominant and most frequent species in different layers
Tree layer
Quercus petraea, locally admixed Castanea sativa (subspontaneous)
Herb layer
Sesleria autumnalis, Helleborus multifidus subsp. istriacus, Knautia drymeia subsp. tergestina, Pulmonaria angustifolia, Serratula tinctoria
Moss layer (incl. lichens)
No details
Diagnostically important species
Quercus petraea; Sesleria autumnalis, Serratula tinctoria
Ecological variants
No details
Geographical variants (geogr. differential species)
---
Natural accompanying vegetation (most important units in complex with the name giving mapping unit, scientific names)
No details
Adjoining climax and permanent vegetation (with numbers of mapping units)
oak-hornbeam forests (F65), species-rich beech forests (F150), hop-hornbeam-downy oak forests (G48, G51).
Land use, substitute communities
forestry (substitute communities, plantations of economic tree-species, scrub)
Low forest.
grassland (meadows, pastures, herb-rich communities)
Chrysopogoni-Euphorbietum nicaeensis.
arable land (characteristic weed communities)
---
settlements (typical ruderal vegetation)
---
Site conditions of the mapping unit
Landscape type, geomorphology
hilly country
Altitudinal belt and/or altitudinal range
submontane
Geology (bedrock)
flysch (Tertiary, Cretaceous)
soil type, also the depth of fine textured earth (soil), stone content; (international nomenclature)
brown soil; (chromic cambisols)
soil moisture, water balance
fresh to moderately (periodically-)dry
soil reaction
weakly acidic to neutral
soil fertility
mesotrophic
Climate incl. local climate
climate type (following Walter & Lieth)
VI(X)
average annual temperature
10-12 °C
average annual precipitation
1000 mm
average temperature of the warmest month
July 24-26 °C
average temperature of the coldest month
January 1-2 °C
local climate or other climatic peculiarities
---
Importance for nature protection
Present state and development trend of natural vegetation (degree of endangerment)
Endangered.
endangered communities, species worthy of protection in natural vegetation
No details
causes of endangerment
Degradation due to low forest management.
required measures for protection and restitution
The best preserved semi-natural stands should be placed under protection.
Localities of representative stands (loci typici) with state of protection
of the natural vegetation
No details
of characteristic substitute communities worthy of protection
No details
Most important references (author, year)
Poldini 1982
Compiled by
I. Trinajstić
