European Information System on Forest Genetic Resources
Detail page for Unit number: GBR00018 and Target species: Alnus glutinosa
| Country of the unit : | United Kingdom |
| Unit number: | GBR00018 |
| National gene conservation unit number: | 18 |
| Province or state: | Scotland |
| Department or county: | Highland |
| Municipality: | Appin |
| Local name : | Glasdrum Wood NNR |
| Latitude : | 56.563231°N |
| Longitude : | 5.256466°W |
| Restriction in making the geographical coordinates publically available: | 0 |
| Datum: | |
| Polygon coordinates (if available): | |
| Minimum elevation (m): | 10 |
| Maximum elevation (m): | 535 |
| Surface area of the unit (ha): | 120.6 |
| Ownership of the unit : | Public |
| Type and function of the unit : | Gene reserve forest; Biodiversity conservation (habitats AND/or species) |
| 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: | 2023 |
| Year of the most recent visit: | 2023 |
| Remarks on specific soil characteristics: | The rock types of the reserve are mainly black slates and phyllites - grey green rocks often intensely folded and crumpled with minerals of mica and quartz. The lower slopes have outcrops of calcareous rocks; limestone extends into the reserve at ST Marys and higher up the slope intrusions of igneous rocks occur. |
| Remarks on other specific characteristics of the unit: | Glasdrum wood is a remenant of ancient woodland and temperate rainforest. The NNR is split into five zones with the lower woodland to the west dominated by gladed ash and hazel with a high lichen interest. A section within zone one was historically felled for conifer planting so there is a pocket of dense 'black woods' alder, birch and willow regrowth which is coppiced. Zone two is the lower east woodland which holds a mix of oak and birch, with stands of ash/ hazel. Zone three is a mosaic of mature ash trees with large bracken glades. The fourth zone reaches the upper wooded limit and holds gladed ash/ hazel woodland with a high lichen interest. Zone five is mostly open ground reaching to the top of the 500m summit. |
| All tree species growing in the unit: | Betula pendula; Corylus avellana; Alnus glutinosa; Acer pseudoplatanus; Betula pubescens; Ulmus glabra; Quercus robur; Crataegus monogyna; Salix caprea; Quercus petraea; Prunus spinosa; Fraxinus excelsior |
| Target species: | Alnus glutinosa |
| National population unit number if existing: | |
| Year of establishment of the GCU for the species: | 2024 |
| Year of the most recent visit: | 2023 |
| Status of the target tree population regarding the EUFORGEN common action plans.: | Included |
| Category of the population: | In situ |
| Origin of the material: | Autochtonous |
| Predominant silvicultural system: | Coppice |
| 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: | 500 - 4999 |
| Sex ratio, if appropriate: | |
| Status of long-term viable regeneration : | Continuous |
| Distribution of the reproducing trees in the unit (multiple choice): | In stands; In groups |
| Estimated share of the total area within the unit in which the species is occurring (%): | 80 |
| Remarks on the population: |