說明
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
資料紀錄
此資源sampling event的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 766 筆紀錄。
亦存在 1 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。
版本
以下的表格只顯示可公開存取資源的已發布版本。
如何引用
研究者應依照以下指示引用此資源。:
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
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 University of Oslo。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: 0a46c2f5-1d7c-49e9-bfd2-7065db24e168。 University of Oslo 發佈此資源，並經由GBIF Norway同意向GBIF註冊成為資料發佈者。
關鍵字
Metadata
聯絡資訊
https://orcid.org/0009-0004-9151-2833
地理涵蓋範圍
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.
| 界定座標範圍 | 緯度南界 經度西界 [-90, -180], 緯度北界 經度東界 [90, 180] |
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分類群涵蓋範圍
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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計畫資料
無相關描述
| 計畫名稱 | Natur i Endring |
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取樣方法
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.
| 研究範圍 | The study extent includes mainland Norway. |
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方法步驟描述:
- 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.
額外的詮釋資料
| 替代的識別碼 | 0a46c2f5-1d7c-49e9-bfd2-7065db24e168 |
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| https://ipt.gbif.no/resource?r=tf-fl-norge |