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: 2007

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]: 2
Coordinates (Public coordinates): Latitude (Decimal):50.8659 | Longitude (Decimal): 5.8005

Soil: Haplic Luvisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Cool temperate.
Environmental zone:Cool temperate and moist.
Aridity index: 1.290

Species

All tree species reported in the unit: Acer campestre; Carpinus betulus
Target species for conservation in the GCU: Carpinus betulus

Unit type: Biodiversity conservation, Seed stand

Target species: Carpinus betulus
Status of the target species in the GCU: -
Category of the target species in the GCU: In situ
Origin of the target species in the GCU : Autochthonous
Population share (%): 20%
Estimated number of reproducing trees (interval): 15 - 50
Status of long-term viable regeneration: Sporadic

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