European Information System on Forest Genetic Resources
Detail page for Unit number: ISL00001 and Target species: Betula pubescens
| Country of the unit : | Iceland |
| Unit number: | ISL00001 |
| National gene conservation unit number: | 1 |
| Province or state: | |
| Department or county: | |
| Municipality: | Thingeyjarsveit |
| Local name : | Skuggabjargarskogur |
| Latitude : | 65°51'19"N |
| Longitude : | 17°54'21"W |
| Restriction in making the geographical coordinates publically available: | 0 |
| Datum: | |
| Polygon coordinates (if available): | |
| Minimum elevation (m): | 40 |
| Maximum elevation (m): | 300 |
| Surface area of the unit (ha): | 292 |
| Ownership of the unit : | Public |
| Type and function of the unit : | Forest area managed for wood production AND/or multiple uses AND services |
| Monthly temperature (°C): | |
| Total annual mean precipitation (mm): | |
| Heat sum and/or length of the growing season (in days): | |
| Accumulated moisture deficit: | |
| Year of collection of the field data entered: | 2009 |
| Year of the most recent visit: | 2009 |
| Remarks on specific soil characteristics: | |
| Remarks on other specific characteristics of the unit: | |
| All tree species growing in the unit: | Sorbus aucuparia; Juniperus communis; Betula pubescens |
| Target species: | Betula pubescens |
| National population unit number if existing: | |
| Year of establishment of the GCU for the species: | 2010 |
| Year of the most recent visit: | 2009 |
| Status of the target tree population regarding the EUFORGEN common action plans.: | |
| Category of the population: | In situ |
| Origin of the material: | Autochtonous |
| Predominant silvicultural system: | Close-to-natural forestry (continuous cover forest, selective logging) |
| Level of management allowed to favour the target species: | Conservation through active intervention carried out |
| Main reason for carrying out gene conservation for this species: | To maintain genetic diversity in large tree populations |
| Total number of reproducing trees per unit: | > 5000 |
| Sex ratio, if appropriate: | Even sex ratio |
| Status of long-term viable regeneration : | Sporadic |
| Distribution of the reproducing trees in the unit (multiple choice): | In stands |
| Estimated share of the total area within the unit in which the species is occurring (%): | 85 |
| Remarks on the population: | Selective logging is sporatically carried out in a small part of the unit, with the birch regenerating by coppicing. Most of the unit is not actively managed and regeneration takes place by seeding or stump sprouts. The forest is mostly mature and in case of regeneration failure, soil scarification will be carried out to promote seedling establishment after self seeding. In other words, active intervention is not precluded. |