National gene conservation unit number: EUAP0237
Date of collection of the field data entered: 1973
Date of the most recent visit: 2025

Location

Unit country: Italy
Unit province or state: Umbria
Unit department or county: Terni
Unit municipality: Arrone
Unit local name: Val Nerina - Parco fluviale del Nera
Ownership of the unit: Public
Unit elevation [m a.s.l.]: 700 - 1000
Unit surface area [ha]: 250
Coordinates (Public coordinates): Latitude (Decimal):42.5682 | Longitude (Decimal): 12.7654

Soil: Eutric Cambisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Warm temperate.
Environmental zone:Warm temperate and mesic.
Aridity index: 0.982

Species

All tree species reported in the unit: Pinus halepensis; Pinus nigra; Sorbus aucuparia
Target species for conservation in the GCU: Pinus halepensis

Unit type: Gene reserve forest, Biodiversity conservation, Protective forest area

Target species: Pinus halepensis
Status of the target species in the GCU: Included
Category of the target species in the GCU: In situ
Origin of the target species in the GCU : Autochthonous
Population share (%): 70%
Estimated number of reproducing trees (interval): >5001
Status of long-term viable regeneration: Required management intervention

Management
Population management: Minimum intervention allowed
Predominant silvicultural system: Close-to-nature forestry