National gene conservation unit number: 01BGD001
Date of collection of the field data entered: 1995
Date of the most recent visit: 2022

Location

Unit country: Lithuania
Unit province or state: Panevezys
Unit department or county: Birzai
Unit municipality: Nemunelis Radviliskis
Unit local name: Birzai giria birch state genetic reserve
Ownership of the unit: Public
Unit elevation [m a.s.l.]: 75 - 75
Unit surface area [ha]: 6.1
Coordinates (Public coordinates): Latitude (Decimal):56.2819 | Longitude (Decimal): 24.9819

Soil: Gleyic Luvisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Boreal / Alpine.
Environmental zone:Cold and mesic.
Aridity index: 1.164

Species

All tree species reported in the unit: Alnus glutinosa; Pinus sylvestris; Betula pendula; Populus tremula; Picea abies
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 : Autochtonous
Population share (%): 63%
Estimated number of reproducing trees (interval): 500 - 4999
Status of long-term viable regeneration: -

Management
Population management: Minimum intervention allowed
Predominant silvicultural system: Close-to-natural forestry (continuous cover forest, selective logging)