Description
The dataset is structured in Darwin Core (DwC) format, utilizing the Event Core and Occurrence extension to organize and standardize the data. Each event represents a collection of treeline or forest line observations made at a specific location, encapsulating both historical and modern records. Historical observations, which typically include only altitude and the name of the location, are grouped with newer registrations that feature precise GPS coordinates. This approach ensures that all observations associated with a given site are grouped logically, facilitating temporal comparisons and allowing for comprehensive analysis of changes over time, even when precise spatial data is unavailable for older records. is a placeholder
Data Records
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 766 records.
1 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Tjessem, I. V., Horvath, P., Volden, I. K., Naas, A. E., Torma, M., & Bryn, A. (2025). Sampling of highest Betula pubescens subsp. czerepanovii treelines and forest lines in Norway. University of Oslo. Dataset/species occurrences. https://doi.org/10.15468/ua2sdc
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is University of Oslo. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: 0a46c2f5-1d7c-49e9-bfd2-7065db24e168. University of Oslo publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.
Keywords
Metadata
Contacts
- Originator ●
- Point Of Contact
https://orcid.org/0009-0004-9151-2833
Geographic Coverage
The TFLs have been resampled in 6 counties in Norway. Parts of the datasets cover large mountain regions of south-central Norway (Trøndelag, Innlandet and Buskerud), whereas the rest of the dataset covers a fiord-valley region of western Norway (Vestland) and an east-west gradient of northern Norway (Nordland and Troms). The dataset has been collected in the uppermost parts of the boreal (FL) and the lower parts of the alpine (TL) bioclimatic regions.
| Bounding Coordinates | South West [-90, -180], North East [90, 180] |
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Taxonomic Coverage
The dataset presented in this paper includes occurrence data exclusively for mountain birch (Betula pubescens subsp. czerepanovii).
| Subspecies | Betula pubescens subsp. czerepanovii (Mountain birch) |
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Project Data
No Description available
| Title | Natur i Endring |
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Sampling Methods
The original TFL locations were identified by searching published databases, literature, and documents. The original data only provided names of the specific mountain alongside aspect and elevation (measured with compass and aneroid barometer). All data was recorded in-situ.
| Study Extent | The study extent includes mainland Norway. |
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Method step description:
- It was crucial that the original publications included specific and precise locality names (name of municipality and mountain/site). The original locality names were used to locate sites based on a query in the standard Norwegian topographic maps (NMA 2017). If locality names had changed, they were identified with the help of historical analog maps. Furthermore, the original data had to include the following information: - elevation - tree-forming specie(s) - exposition/aspect (except 7 historical registrations with unknown aspect (NA)) The resampling was conducted through in-situ field mapping using Global Positioning Systems (GPSs) for elevation measurements and confined to the same tree-forming species (Betula pubescens subsp. czerepanovii) and exposition as the original entries.
Additional Metadata
| Alternative Identifiers | 0a46c2f5-1d7c-49e9-bfd2-7065db24e168 |
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| https://ipt.gbif.no/resource?r=tf-fl-norge |