National gene conservation unit number: 60080014
Population number: -

GCU
Date of collection of the field data entered: 1986
Date of the most recent visit: 2013

POPULATION
Year of Establishment of the GCU for the species: 1986
Date (or partial of date) of the most recent visit: 2013

Location

Unit country: Latvia
Unit province or state: -
Unit department or county: Jekabpils novads
Unit municipality: Kalna pagasts
Unit local name: Birzi apse
Ownership of the unit: Public
Unit elevation [m a.s.l.]: 95 - 100
Unit surface area [ha]: 49
Coordinates ( Public coordinates): Latitude (Decimal):56.3964 | Longitude (Decimal): 25.8951

Soil: Gleyic Luvisols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Boreal / Alpine.
Environmental zone:Cold and mesic.
Aridity index: 1.187

Species

All tree species growing in the unit: Alnus glutinosa; Alnus incana; Betula pendula; Picea abies; Populus tremula; Quercus robur
Target species for conservation in the GCU: Populus tremula

Unit type: Gene reserve forest, Protective forest area, Managed forest area

Target species: Populus tremula
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 (%): 100%
Estimated number of reproducing trees (interval): >5001
Status of long-term viable regeneration: Required management intervention

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