Survey of freshwater pearl mussel in Lysakerelva, Norway
Citation
Løkken J O (2024). Survey of freshwater pearl mussel in Lysakerelva, Norway. Version 1.2. NaturRestaurering AS. Sampling event dataset https://doi.org/10.15468/vwwk82 accessed via GBIF.org on 2024-12-13.Description
In March 2023, freshwater pearl mussels was re-located in the Lysaker river. The relocation was carried out as a precautionary measure because the discharge of injection compounds from the tunnel work at Fornebubanen can cause damage/mortality to occurrences of mussel in the area of influence. Fornebubanen is obliged to monitor the mussel population in the river and report annually to the State Administrator on the condition. On behalf of Fornebubanen, NaturRestaurering AS has carried out a survey in June 2023.Sampling Description
Study Extent
The survey was conducted along a 500 meter stretch along the Lysaker riverSampling
The survey is conducted by personal observations performed by freshwater ecologists. Density of freshwater pearl mussels was recorded per m2 at stations along a transect in the river. Due to depths which in some cases do not make wading possible, the work was carried out by snorkelling, where the density and condition of mussels were recorded within different zones of the river and recorded continuously in maps (Arcgis fieldmaps). A Gopro camera was used for photo documentation.Method steps
- - Snorkling along a river transect - Recording density of mussels per m2 at stations along the transect - Data recorded in ArcGis fieldmaps and exported to darwinCore
Taxonomic Coverages
Geographic Coverages
The survey was conducted along a 500 meter stretch of the Lysaker river.
Bibliographic Citations
Contacts
Jørn Olav Løkkenoriginator
position: Senior advisor
NaturRestaurering AS
userId: https://orcid.org/0000-0003-1024-0406
Jørn Olav Løkken
metadata author
position: Senior advisor
NaturRestaurering AS
userId: https://orcid.org/0000-0003-1024-0406
Jørn Olav Løkken
curator
email: jorn.lokken@naturrestaurering.no
Sigurd Toverud
content provider
position: Ecologist
NaturRestaurering AS
Kjetil Flydal
principal investigator
position: Senior Advisor
NaturRestaurering AS
Jørn Olav Løkken
administrative point of contact
position: Senior advisor
NaturRestaurering AS
userId: https://orcid.org/0000-0003-1024-0406