Vascular plant presence/absence from lime-rich forest in selected sites categorized by the Ecosyst framework.

Sampling event
Latest version published by University of Oslo on Feb 15, 2024 University of Oslo
Publication date:
15 February 2024
Published by:
University of Oslo
CC-BY 4.0

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Data as a DwC-A file download 306 records in English (1 MB) - Update frequency: not planned
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This dataset encompasses the results of an exhaustive survey focused on vascular plant biodiversity within the Drammensdalføret region, specifically targeting the predominantly north-facing southern slopes covering an elevation range of 81–389 meters above sea level. The study area is characterized by its varied terrain, from rolling to rugged, bisected by the deep Veia Gorge with the Veia river flowing from south to north. The northern parts of the area, lying below the marine limit, feature largely cultivated flat terrains. The geological foundation comprises sedimentary rocks from the Oslo field, with a generally thin overlying layer of soil deposits. The region's long history of land use, primarily for grazing and forestry, significantly marks its landscape. Our study adopted a meticulous sampling design in alignment with the EcoSyst/NiN methodology, aiming to analyze compositional patterns and ecodiversity distances across forests. To capture the ecological variance, particularly focusing on environmental gradients such as lime richness, drought risk, and the influence of spring water, we deployed 10 × 10 m plots along semi-random transects. These transects were strategically arranged to traverse the ecological spectrum with minimal bias, ensuring a representative sampling of the area's ecological diversity. The placement of transects and plots prioritized capturing ecological variances within predefined polygons, with 48 transects and 342 plots ultimately selected for detailed examination, as outlined in the study's appendices. The dataset is structured into three key components to provide a holistic view of the study's findings: Event Core Dataset: Documents each observational event, detailing the geographic and ecological context of the plots surveyed. Occurrence Extension Dataset: Contains records of individual plant species observed within the plots, offering insights into the area's floristic diversity. MeasurementOrFact Extension Dataset: Enriches the dataset with specific environmental measurements and facts related to each observational event, allowing for a deeper understanding of the conditions under which observations were made. This comprehensive survey of vascular plant biodiversity not only enhances our understanding of the ecological diversity within the Drammen valley but also contributes valuable data to the global biodiversity informatics infrastructure through GBIF. By documenting the rich biodiversity and the intricate ecological gradients of this region, the dataset supports further research in plant ecology, conservation planning, and the management of natural resources.

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 306 records.

2 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.

Event (core)

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.


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Sivertsen B (2024). Vascular plant presence/absence from lime-rich forest in selected sites categorized by the Ecosyst framework.. Version 1.0. University of Oslo. Samplingevent dataset.


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 not been registered with GBIF


Samplingevent; Observation


Bendik Sivertsen
  • Originator
  • Point Of Contact
Executive Officer
Sállir natur AS

Geographic Coverage

The survey area is located on the predominantly north-facing southern side of the Drammen valley and includes the elevation range of 81–389 meters above sea level. The area is bisected from south to north by the Veia Gorge, a deep gorge containing the Veia river. On a finer scale, the terrain is varied, from rolling to rugged, intersected by valleys and ridges of varying sizes. In the north of the area, which is below the marine limit, the flat terrain is largely cultivated. The bedrock consists of sedimentary rocks from the Oslo field, and the layer of loose deposits is thin. The entire area is characterized by a long history of use, primarily for outlying grazing and forestry.

Bounding Coordinates South West [59.717, 9.956], North East [59.73, 9.991]

Temporal Coverage

Start Date / End Date 2021-06-12 / 2021-10-04

Sampling Methods

The study implemented a detailed sampling design using 10 × 10 m plots aligned with EcoSyst/NiN methodology for analyzing compositional patterns and ecodiversity distance. These plots were arranged along semi-random transects optimized to capture the ecological variation in forests, particularly focusing on local environmental complex gradients like lime richness, drought risk, and spring-water influence. The transects were carefully placed to ensure representativity across different ecological conditions with minimal subjective selection, effectively covering the study area's ecological diversity. The sampling involved randomizing transect positions across predefined polygons, prioritizing the inclusion of ecological variation and minimizing border effects. Transects were systematically placed and extended, considering various ecological and physical barriers, to ensure a comprehensive survey of the area's ecological diversity. This approach allowed for the direct use of data in NiN contexts and aimed to optimize ecological representation across the study area, culminating in the selection of 48 transects and 342 plots that were detailed in the study's appendices.

Study Extent The study is geographically located around the Veia nature reserve Nedre Eiker (Drammen municipality), southeastern Norway, covering an area of about four square kilometers. It has a temporal span from 12. of June 2021 to 4. of October 2021. Vascular plant species were recorded across the complete lime-richness gradient, drought risk gradient and across degrees of source influence, in relation to the Ecosyst framework.

Method step description:

  1. The geographic position of each transect was located by using a Garmin GPS. Each Transsect was then delineated using a rope, and each site with the transect separated likewise. After this, the vascular plant species present within the sitre were recorded as "present" if found.

Additional Metadata