Macrophyte survey in Stavanger, Norway, 2025

Data Records

The data in this occurrence 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 108 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:

Askedalen B K (2026). Macrophyte survey in Stavanger, Norway, 2025. Version 1.6. Norwegian Institute for Water Research (NIVA). Occurrence dataset. https://ipt.gbif.no/resource?r=niva_macrophytes_2025&v=1.6

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is Norwegian Institute for Water Research (NIVA). To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 9237b55a-26ca-4a65-9686-8b8a922f5a4e.  Norwegian Institute for Water Research (NIVA) publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.

Keywords

Occurrence; Observation

Contacts

Geographic Coverage

The survey was done in selected lakes in Stavanger municipality. With Najas flexilis, or asummed potential unknown populations.

Taxonomic Coverage

Freshwater plants and macroscopic green algae

Temporal Coverage

Project Data

This project aimed to map the status of slender naiad (Najas flexilis) and other red listed aquatic plants in Stavanger municipality in the autumn of 2025. Slender naiad was recorded in Mosvatnet, but not in the three other lakes where the species had previously been detected. A further six lakes were surveyed, but no new populations of slender naiad was discovered. For more information see report Askedalen, B. (2025). Vannplanteundersøkelse i Stavanger kommune: Kartlegging etter mykt havfruegras. NIVA-rapport. ISSN 1894-7948.

The personnel involved in the project:

Sampling Methods

The species was surveyed following Norsk Standard. (2007). Vannundersøkelse – Veiledning for overvåking av makrovegetasjon i innsjøer (NS-EN 15460:2007). Oslo.

Method step description:

1. Se text above

Additional Metadata