National gene conservation unit number: SK 344-2018
Date of collection of the field data entered: 2018
Date of the most recent visit: 2018

Location

Unit country: Sweden
Unit province or state: Sweden
Unit department or county: Uppsala lan
Unit municipality: Tierp
Unit local name: Hallholmen
Ownership of the unit: Private
Unit elevation [m a.s.l.]: 36 - 41
Unit surface area [ha]: 13.3
Coordinates (Public coordinates): Latitude (Decimal):60.1938 | Longitude (Decimal): 17.3740

Soil: Haplic Podzols

Climate

Mean monthly temperature and mean monthly precipitation²

Climatic zone: Boreal / Alpine.
Environmental zone:Cold and mesic.
Aridity index: 1.146

Species

All tree species reported in the unit: Tilia cordata; Fraxinus excelsior; Ulmus glabra
Target species for conservation in the GCU: Fraxinus excelsior, Tilia cordata, Ulmus glabra

Unit type: Biodiversity conservation (habitats AND/or species)

Target species: Fraxinus excelsior
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 (%): 100%
Estimated number of reproducing trees (interval): 500 - 4999
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)

Target species: Tilia cordata
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 (%): 100%
Estimated number of reproducing trees (interval): 50 - 499
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)

Target species: Ulmus glabra
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 (%): 100%
Estimated number of reproducing trees (interval): 50 - 499
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)