European Information System on Forest Genetic Resources
Detail page for Unit number: LVA00031 and Target species: Fraxinus excelsior
| Country of the unit : | Latvia |
| Unit number: | LVA00031 |
| National gene conservation unit number: | 60110013 |
| Province or state: | |
| Department or county: | Jelgavas novads |
| Municipality: | Sesavas pagasts |
| Local name : | Svirlauka osis |
| Latitude : | 56°24'24.8"N |
| Longitude : | 23°46'57.1"E |
| Restriction in making the geographical coordinates publically available: | 0 |
| Datum: | |
| Polygon coordinates (if available): | |
| Minimum elevation (m): | 33 |
| Maximum elevation (m): | 33 |
| Surface area of the unit (ha): | 267.01 |
| Ownership of the unit : | Public |
| Type and function of the unit : | Gene reserve forest; Protective forest area (soil, water, timber line, etc.); 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: | 1998 |
| Year of the most recent visit: | 2016 |
| Remarks on specific soil characteristics: | |
| Remarks on other specific characteristics of the unit: | |
| All tree species growing in the unit: | Alnus glutinosa; Betula pendula; Alnus incana; Fraxinus excelsior; Populus tremula; Picea abies |
| Target species: | Fraxinus excelsior |
| National population unit number if existing: | |
| Year of establishment of the GCU for the species: | 1998 |
| Year of the most recent visit: | 2020 |
| 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: | Clear-cutting with natural regeneration (seed trees or strips) |
| 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 conserve specific adaptive and/or phenotypic traits in marginal or scattered tree populations which are often relatively small |
| Total number of reproducing trees per unit: | 500 - 4999 |
| Sex ratio, if appropriate: | Predominately females |
| Status of long-term viable regeneration : | Requires management intervention |
| 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 (%): | 98 |
| Remarks on the population: |