National gene conservation unit number: NL.SI.3.6.21-01
Date of collection of the field data entered: 1996
Date of the most recent visit: 2022

Location

Unit country: Netherlands
Unit province or state: Limburg
Unit department or county: -
Unit municipality: Valkenburg aan de Geul
Unit local name: Valkenburg
Ownership of the unit: Public
Unit elevation [m a.s.l.]: 60 - 90
Unit surface area [ha]: 30
Coordinates (Public coordinates): Latitude (Decimal):50.8682 | Longitude (Decimal): 5.7820

Soil: Haplic Luvisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Cool temperate.
Environmental zone:Cool temperate and moist.
Aridity index: 1.230

Species

All tree species reported in the unit: Ulmus laevis
Target species for conservation in the GCU: Ulmus laevis

Unit type: Biodiversity conservation (habitats AND/or species)

Target species: Ulmus laevis
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 : Autochtonous
Population share (%): 10%
Estimated number of reproducing trees (interval): 15 - 49
Status of long-term viable regeneration: Sporadic

Management
Population management: Minimum intervention allowed
Predominant silvicultural system: No silviculture