Sampling event

Abundance of zooplankton during the polar night (cruise in January 2017) at 13 stations using a 64um-mesh Multinet

Latest version published by UiT The Arctic University of Norway on 27 January 2022 UiT The Arctic University of Norway
---METADATA ONLY, data will get added to this dataset shortly.--- Sampling was conducted during the Polar Night cruise 2017 (PNC17), 6th to 17th January 2017 in the waters of the western Barents Sea and Svalbard archipelago. Zooplankton was collected using a Multinet (64um-mesh) This dataset isused in the publication of Barth-Jensen et al. 2022
Publication date:
27 January 2022
License:
CC-BY-NC 4.0

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How to cite

Researchers should cite this work as follows:

Barth-Jensen C, Daase M, Ormańczyk M, Kwaśniewski S, Varpe Ø, Svensen C (2022): Abundance of zooplankton during the polar night (cruise in January 2017) at 13 stations using a 64um-mesh Multinet. v1.0. UiT The Arctic University of Norway. Dataset/Samplingevent. https://ipt.gbif.no/resource?r=uit-2017-cruise-zooplankton-abundance&v=1.0

Rights

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The publisher and rights holder of this work is UiT The Arctic University of Norway. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 76ef1883-c32a-49bb-a36c-2752af1b4e95.  UiT The Arctic University of Norway publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.

Keywords

Samplingevent; zooplankton meroplankton Svalbard fjord polar night abundances

Contacts

Who created the resource:

Coralie Barth-Jensen
PhD student
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO
Malin Daase
Researcher
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO
Mateusz Ormańczyk
Sławomir Kwaśniewski
Øystein Varpe
Professor
University in Bergen
Bergen
NO
Camilla Svensen
Professor
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO

Who can answer questions about the resource:

Coralie Barth-Jensen
PhD student
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO

Who filled in the metadata:

Coralie Barth-Jensen
PhD student
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO

Who else was associated with the resource:

User
Rukaya Johaadien
Author
Camilla Svensen
Professor
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO
Author
Malin Daase
Researcher
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO
Author
Coralie Barth-Jensen
PhD student
University in Tromsø
Postboks 6050 Langnes
9037 Tromsø
NO
77645554
Author
Mateusz Ormańczyk
Author
Sławomir Kwaśniewski
Author
Øystein Varpe
Professor
University in Bergen
Bergen
NO

Geographic Coverage

13 stations were sampled: Six oceanic stations: TB1 and TB2 (located in the western Barents Sea), NS1, NS4 and NS10 (located on the shelf north of Svalbard) and NS6 (located off the shelf north of Svalbard). Seven fjord stations: VMF9 (located near Bellsund, at the opening of Van Mijenfjorden), KF1, KF2 and KF3 (located in Krossfjorden on the west coast of Svalbard), and R3, R3b and R4 (located in Rijpfjorden on the northern coast of Nordaustlandet).

Bounding Coordinates South West [70.507, 11.596], North East [81.356, 22.256]

Taxonomic Coverage

No Description available

Genus  Paraeuchaeta,  Pseudocalanus,  Spinocalanus
SpeciesAggregate  Paracalanus/Clausocalanus/Ctenocalanus CIV-CV
Species  Metridia lucens,  Pleuromamma robusta,  Scolecithricella minor

Temporal Coverage

Start Date / End Date 2017-01-06 / 2017-01-17

Project Data

No Description available

Title PNC17_Polar night cruise January 2017_Zooplankton abundances
Funding UiT funded the PhD grant of CBJ, and the ARCTOS network funded parts of the cruise. The fieldwork was funded by the Norwegian Research Council (Arctic ABC [244319]). MD received additional funding through NRC project Deep Impact [300333] and was supported by Tromsø Forskningsstiftelse (project Arctic ABC-East).

The personnel involved in the project:

Owner
Coralie Barth-Jensen
Principal Investigator
Camilla Svensen

Sampling Methods

Zooplankton was sampled using vertically stratified net hauls with a multiple opening/closing net (MultiNet type Midi, Hydro-Bios, Germany, mouth opening 0.25 m2, 64-µm mesh, towing speed 0.4 m s-1). The four depth strata sampled were 3-50 m, 50-100 m, 100-200 m and 200-400 m, or to 10 m above the bottom at stations shallower than 400 m. A 64-µm mesh WP-2 net (Hydro-Bios, Germany, opening 0.25 m2) was used for the 0-50 m sampling at station TB2 due to a tear in the MultiNet net bag. A technical error resulted in only the upper 100 m being sampled at station KF1.

Study Extent 13 stations were sampled between 2017-01-06 and 2017-01-17: Six oceanic stations: TB1 and TB2 (located in the western Barents Sea), NS1, NS4 and NS10 (located on the shelf north of Svalbard) and NS6 (located off the shelf north of Svalbard). Seven fjord stations: VMF9 (located near Bellsund, at the opening of Van Mijenfjorden), KF1, KF2 and KF3 (located in Krossfjorden on the west coast of Svalbard), and R3, R3b and R4 (located in Rijpfjorden on the northern coast of Nordaustlandet).

Method step description:

  1. Immediately after collection the samples were fixed in hexamethylenetetramine-buffered formaldehyde in seawater solution at 4% final concentration. The samples were later analyzed under a stereomicroscope (Olympus SZX7). Organisms with total length > 5 mm were sorted from the sample, identified and counted. Then aliquots were taken with a 2-mL pipette with the tip cut at 5-mm diameter to allow collection of mesozooplankton. The number of aliquots and subsamples analyzed was chosen so that at least 300 individuals were counted in each sample. The remainder of the sample was screened for rare species. Species were identified to the lowest taxonomic level and classified as holoplankton or meroplankton. For copepods, a detailed analysis of copepodid stage composition was performed for Calanus spp., O. similis, M. norvegica, Pseudocalanus spp., M. longa and Microcalanus spp. The CI to CIII stages were not differentiated for Microcalanus spp. at station TB1, and for O. similis and M. norvegica at all stations. Early stages (CI to CIII) classified as Microcalanus spp. probably included young copepodids of Paracalanus spp., Clausocalanus spp. and Ctenocalanus spp., because it is difficult to distinguish these species via visual identification. The CI to CIII stages of M. longa and M. lucens were not differentiated, and were designated M. longa. The three Calanus species were differentiated on the basis of size (Kwasniewski et al. 2003); this involves some uncertainty because prosome lengths of species of the genus can overlap (Gabrielsen et al. 2012; Choquet et al. 2018). Copepod nauplii were determined to order (Calanoida, Cyclopoida and Harpacticoida).

Additional Metadata