National gene conservation unit number: NL.SI.3.6.10-01
Date of collection of the field data entered: 2025
Date of the most recent visit: 2025

Location

Unit country: Netherlands
Unit province or state: Limburg
Unit department or county: -
Unit municipality: Gulpen-Wittem
Unit local name: Wijlre
Ownership of the unit: Public
Unit elevation [m a.s.l.]: 160 - 190
Unit surface area [ha]: 26
Coordinates (Public coordinates): Latitude (Decimal):50.8299 | Longitude (Decimal): 5.8727

Soil: Haplic Luvisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Cool temperate.
Environmental zone:Cool temperate and moist.
Aridity index: 1.337

Species

All tree species reported in the unit: Acer pseudoplatanus; Betula pendula; Carpinus betulus; Corylus avellana; Fraxinus excelsior; Prunus avium; Quercus petraea; Quercus robur; Sorbus aucuparia; Tilia cordata
Target species for conservation in the GCU: Tilia cordata

Unit type: Seed stand

Target species: Tilia cordata
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 (%): 80%
Estimated number of reproducing trees (interval): 51 - 500
Status of long-term viable regeneration: Sporadic

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