Øvre Heimdalsvatn, Radiocaesium (Cs-137) monitored annually in brown trout (Salmo trutta)

Latest version published by Natural History Museum, University of Oslo on Oct 29, 2019 Natural History Museum, University of Oslo

"This dataset describes a long time serie for monitoring of radioactive radiocaesium isotope (Cs-137) concentration in the brown trout (Salmo trutta) population in a mountain lake (Øvre Heimdalsvatn) situated on the tree line in the eastern edge of the Jotunheimen Mountains. Ecosystem studies at Øvre Heimdalsvatn started in 1957, while this time series for radioecological monitoring started after the Chernobyl nuclear power plant accident in 1986. The aim of this study was to document the long-term changes in the radioactive isotope Cs-137 in brown trout and to elucidate the factors determining changes in Cs-137 activity concentrations over time. This dataset provides only one time serie from the extensive ecosystem studies (initiated in 1957) at Øvre Heimdalsvatn. The mountain lake is at 1090 meter above sea-level with a surface area of 0.78 square kilometer (km2) (78 hectare). The maximum length is 3 km and the maximum width is 396 m. The largest depth is 13 m and the average depth is 4.7 m. Vegetation near the lake ranges from subalpine birch forest with areas of mountain pasture to high alpine vegetation above 1,600 m a.s.l. Originally brown trout was the sole fish species in the lake, but since 1969 the European minnow (Phoxinus phoxinus) has also been recorded and its numbers have subsequently increased substantially. Brown trout for this study were generally caught by gill netting around the lake."

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 456 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.

  • Occurrence (core)
    456
  • MeasurementOrFact 
    1368

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.

Downloads

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Data as a DwC-A file download 456 records in English (62 KB) - Update frequency: not planned
Metadata as an EML file download in English (8 KB)
Metadata as an RTF file download in English (7 KB)

Versions

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

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is Natural History Museum, 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: 7221810e-52b1-459d-a6a4-02160c67feef.  Natural History Museum, University of Oslo publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.

Keywords

Occurrence; Specimen

Contacts

Who created the resource:

John Edward Brittain
Natural History Museum, University of Oslo Sars gate 1 0562 Oslo NO +4722851727
http://www.nhm.uio.no/english/

Who can answer questions about the resource:

John Edward Brittain
Natural History Museum, University of Oslo Sars gate 1 0562 Oslo NO +4722851727
http://www.nhm.uio.no/english/

Who filled in the metadata:

GBIF-Norway
GBIF-Norway Sars gate 1 0562 Oslo NO +4722851654
http://gbif.no/

Who else was associated with the resource:

Content Provider
Jan Egil Gjerseth
NMBU Campus Ås 1430 Ås NO
https://www.nmbu.no/en
Content Provider
Reidar Borgstrøm
NMBU Campus Ås 1430 Ås NO
https://www.nmbu.no/en
Content Provider
John Gunnar Dokk
NMBU Campus Ås 1430 Ås NO
https://www.nmbu.no/en

Geographic Coverage

Øvre Heimdalsvatn, Norway

Bounding Coordinates South West [61.417, 8.84], North East [61.428, 8.895]

Temporal Coverage

Start Date / End Date 1986-08-04 / 2007-09-19

Project Data

No Description available

Title Øvre Heimdalsvatn
Study Area Description Monitoring of lake ecosystem, including brown trout stocks and interaction with European minnow, benthic macroinvertebrates, zooplankton and radiocesium in water, fish, aquatic moss, allochthonous organic matter and lake sediments. Abiotic parameters, including lake water level, water temperature, ice cover duration, precipitation and air temperature, are also continuously measured. In addition, there extensive studies of bird behaviour in the catchment, as well as monitoring of small mammals.

The personnel involved in the project:

Brittain

Additional Metadata

Alternative Identifiers 7221810e-52b1-459d-a6a4-02160c67feef
https://ipt.gbif.no/resource?r=heimdalsvatn