National gene conservation unit number: 40BGD050
Date of collection of the field data entered: 2010
Date of the most recent visit: 2021

Location

Unit country: Lithuania
Unit province or state: Siauliai
Unit department or county: Pakruojis
Unit municipality: Vismantai
Unit local name: Draumenai forest birch state genetic reserve
Ownership of the unit: Public
Unit elevation [m a.s.l.]: 72 - 72
Unit surface area [ha]: 23.38
Coordinates (Public coordinates): Latitude (Decimal):55.9066 | Longitude (Decimal): 23.7221

Soil: Gleyic Cambisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Boreal / Alpine.
Environmental zone:Cold and mesic.
Aridity index: 0.998

Species

All tree species reported in the unit: Betula pendula; Fraxinus excelsior; Picea abies; Populus tremula; 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 (%): 70%
Estimated number of reproducing trees (interval): 501 - 5000
Status of long-term viable regeneration: -

Management
Population management: Conservation through active intervention carried out
Predominant silvicultural system: Clear-cutting with natural regeneration