Inner Oslofjorden Phytoplankton Database

Elisabeth Lundsør1, Vidar Bakken2

1 University of Oslo, , Norway; 2 

Corresponding author(s): Elisabeth Lundsør, Elisabeth Lundsør (elisabeth.lundsor@norconsult.com)

Received {date}; Revised {date}; Accepted {date}; Published {date}

Citation: Combination of authors, year of data paper publication (in parentheses), Title, Journal Name, Volume, Issue number (in parentheses), and doi of the data paper.

Resource Citation

Lundsør E (2021): Inner Oslofjorden Phytoplankton Database. v1.8. UiO Department of Biosciences. Dataset/Samplingevent. https://ipt.gbif.no/resource?r=oslofjord_phytoplankton&v=1.8

Abstract

The inner Oslofjorden Phytoplankton Database is a comprehensive data collection containing quantitative phytoplankton cell counts, associated metadata and available environmental data. The primary source for the collection is the monitoring programme for inner Oslofjorden conducted with varying yearly frequencies from 1973 until today, mainly by the Norwegian Institute for Water Research (NIVA). From 2006 to 2020, sampling frequency was approximately monthly. Secondary, the database is also supplied with data from various projects from 1896 to 1976, conducted by researchers from University of Oslo (UiO).
The source file for this dataset is available on Zenodo: https://doi.org/10.5281/zenodo.5031409

Keywords: Samplingevent, time series, phytoplankton, environmental data

Project details

Project title: Change in phytoplankton community structure in the inner Oslofjord during a century of sampling
Personnel: Elisabeth Lundsør, Bente Edvardsen, Wenche Eikrem, Leif Christian Stige
Funding: This work was funded by Fagrådet (for vann og avløpsteknisk samarbeid i indre Oslofjord), the Research Council of Norway (RCN, grant no 262960/O30), Niva and Norconsult AS.
Study area descriptions/descriptor: The inner Oslofjorden is a sill fjord of 190 km2 size. The fjord is connected to the more open outer Oslofjorden and Skagerrak through the narrow sound at Drøbak, where the sill is only 19.5 m deep. North of the Drøbak sill, more sills divide the fjord into several basins, such as Vestfjorden (basin depth 162 m), Bærumsbassenget, Bekkelagsbassenget, and Bunnefjorden (basin depth 152m). 

The database contains 411 unique accepted taxa registrations of which 75% are identified to the genus level. These records are distributed among 18 classes. Approximately 9% of the registrations are “flagellates”, “monads” or other not identified to class. The most counted classes in the dataset are Dinophyceae (dinoflagellates) and Bacillariophyceae (diatoms) representing 37.5% and 36%, respectively, of all records.
Design description: The inner Oslofjorden Phytoplankton dataset was compiled in 2020, comprising of quantitative phytoplankton cell counts from inner Oslofjorden since 1896. Previously parts of the data has been available as handwritten or printed tables in reports and published sources17–19. All sources have are digitally available from the UiO University library, the website for “Fagrådet” (http://www.indre-oslofjord.no/) or NIVA online report database (https://www.niva.no/rapporter).  Data from 1994 and onwards have been accessed digitally from the NIVA’s databases but are also available from client reports from the monitoring project for inner Oslofjorden from the online sites listed above.

Data published through GBIF: https://ipt.gbif.no/resource?r=oslofjord_phytoplankton

Spatial coverage

General spatial coverage: Inner Oslofjorden, Norway
Coordinates: 59°39'39.6''N and 59°55'58.8''N Latitude; 10°24'54''E and 10°57'21.6''E Longitude 

Temporal coverage: February 14, 1896 - December 14, 2020

Methods

Method step description: Data was compiled from a range of sources described in "sampling description". After compilation, the original names in our database and matched them to accepted names and Aphia ID using the taxon match tool available in the open-access reference system; World Register of Marine Species (Worms). The data was then formatted to Darwin Core.
Study extent description: The database covers several sampling stations in the inner Oslofjorden, with the majority of samples (61%) from Dk1/S1 (N59.814999 E10.569384). Dk1 has been the most sampled station throughout all the years of sampling.  Data are available for the years 1896-97, 1916-17, 1933-1934, 1939, 1948, 1957-58, 1962-65, 1972-1974, 1988-1990, 1994-1995 and 1998-2020. From 1998-2004 there are only samples during the summer months (May to Aug) but from 2006 to 2020, there is good seasonal coverage.
Sampling description: The inner Oslofjorden Phytoplankton dataset was compiled in 2020, comprising of quantitative phytoplankton cell counts from inner Oslofjorden since 1896. Previously parts of the data has been available as handwritten or printed tables in reports and published sources. Data from 1994 and onwards have been accessed digitally from the NIVA’s databases but are also available from client reports from the monitoring project for inner Oslofjorden. The data already digitalized were compiled from excel files. Other data were manually entered to standard format in MS Excel files. All collected data were then integrated into one excel database.
Quality control description: After compilation, the data were checked for digitalization errors, which could occur during manual digitalization or just the compilation process. Duplicates and zero values were removed. Then taxonomy specialists did perform a taxonomic quality check.
The nomenclature in Worms is quality assured by a wide range of taxonomic specialists. We also cross checked the last updated nomenclature in Algaebase to assign species to a valid class name. When Algaebase and Worms were not in accordance, Algaebase taxonomy was usually chosen except in the case of Bacillariophyceae.

Datasets

Dataset description
Object name: Darwin Core Archive Inner Oslofjorden Phytoplankton Database
Character encoding: UTF-8
Format name: Darwin Core Archive format
Format version: 1.0
Distribution: https://ipt.gbif.no/archive.do?r=oslofjord_phytoplankton
Publication date of data: 2021-06-28
Language: English
Licences of use: Creative Commons Attribution (CC-BY) 4.0 License

External datasets

Dataset description
Object name: Source dataset
Character encoding: UTF-8
Format name: Microsoft Excel
Distribution: https://doi.org/10.5281/zenodo.5031409

Metadata language: English
Date of metadata creation: 2021-06-07
Hierarchy level: Dataset