National gene conservation unit number: CHE00099
Population number: -

GCU
Date of collection of the field data entered: 2024
Date of the most recent visit: 2024

POPULATION
Year of Establishment of the GCU for the species: 2023
Date (or partial of date) of the most recent visit: 2024

Location

Unit country: Switzerland
Unit province or state: BE
Unit department or county: Biel/Bienne, Seeland
Unit municipality: Büetigen, Büren an der Aare, Dotzigen, Kappelen, Lyss, Meienried
Unit local name: Alte Aare
Ownership of the unit: Other
Unit elevation [m a.s.l.]: 429 - 446
Unit surface area [ha]: 66.9998
Coordinates ( Public coordinates): Latitude (Decimal):47.0849 | Longitude (Decimal): 7.2998

Soil: Eutric Gleysols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Cool temperate.
Environmental zone:Cool temperate and moist.
Aridity index: 1.407

Species

All tree species growing in the unit: Fraxinus excelsior; Quercus robur
Target species for conservation in the GCU: Fraxinus excelsior, Quercus robur

Unit type: Gene reserve forest, Biodiversity conservation

Target species: Fraxinus excelsior
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 (%): 75%
Estimated number of reproducing trees (interval): >5001
Status of long-term viable regeneration: -

Management
Population management: Conservation through active intervention carried out
Predominant silvicultural system: Close-to-nature forestry