
National gene conservation unit number: CHE00017 Date of collection of the field data entered: 2020 Date of the most recent visit: 2020 Location Unit country: Switzerland Unit province or state: GR Unit department or county: Landquart Unit municipality: Zizers Unit local name: Obere Au Zizers Ownership of the unit: Other Unit elevation [m a.s.l.]: 528 - 534 Unit surface area [ha]: 18.5 Coordinates (Public coordinates): Latitude (Decimal):46.9241 \| Longitude (Decimal): 9.5592 Soil: Calcaric Phaeozems Climate Mean monthly temperature and mean monthly precipitation² Climatic zone: Cool temperate. Environmental zone:Cool temperate and moist. Aridity index: 1.204 Species All tree species reported in the unit: *Populus nigra* Target species for conservation in the GCU: *Populus nigra* Unit type: Gene reserve forest, Biodiversity conservation (habitats AND/or species) Target species: Populus nigra 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 : Unknown Population share (%): 100% Estimated number of reproducing trees (interval): > 5000 Status of long-term viable regeneration: - Management Population management: Conservation through active intervention carried out Predominant silvicultural system: Close-to-natural forestry (continuous cover forest, selective logging)

National gene conservation unit number: CHE00017
Date of collection of the field data entered: 2020
Date of the most recent visit: 2020

Location

Unit country: Switzerland
Unit province or state: GR
Unit department or county: Landquart
Unit municipality: Zizers
Unit local name: Obere Au Zizers
Ownership of the unit: Other
Unit elevation [m a.s.l.]: 528 - 534
Unit surface area [ha]: 18.5
Coordinates (Public coordinates): Latitude (Decimal):46.9241 | Longitude (Decimal): 9.5592

Soil: Calcaric Phaeozems

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Cool temperate.
Environmental zone:Cool temperate and moist.
Aridity index: 1.204

Species

All tree species reported in the unit: Populus nigra
Target species for conservation in the GCU: Populus nigra

Unit type: Gene reserve forest, Biodiversity conservation (habitats AND/or species)

Target species: Populus nigra
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 : Unknown
Population share (%): 100%
Estimated number of reproducing trees (interval): > 5000
Status of long-term viable regeneration: -

Management
Population management: Conservation through active intervention carried out
Predominant silvicultural system: Close-to-natural forestry (continuous cover forest, selective logging)