National gene conservation unit number: 18BGD052
Population number: -

GCU
Date of collection of the field data entered: 2010
Date of the most recent visit: 2025

POPULATION
Year of Establishment of the GCU for the species: 2010
Date (or partial of date) of the most recent visit: 2025

Location

Unit country: Lithuania
Unit province or state: Taurage
Unit department or county: Silale
Unit municipality: Gerviske
Unit local name: Pagramantis forest birch genetic reserve
Ownership of the unit: Public
Unit elevation [m a.s.l.]: 71 - 71
Unit surface area [ha]: 4.58
Coordinates ( Public coordinates): Latitude (Decimal):55.3922 | Longitude (Decimal): 22.1585

Soil: Gleyic Podzoluvisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Boreal / Alpine.
Environmental zone:Cold and mesic.
Aridity index: 1.388

Species

All tree species growing in the unit: Betula pendula; Picea abies; Quercus robur
Target species for conservation in the GCU: Betula pendula

Unit type: Gene reserve forest

Target species: Betula pendula
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 (%): 95%
Estimated number of reproducing trees (interval): 501 - 5000
Status of long-term viable regeneration: -

Management
Population management: -
Predominant silvicultural system: -