Abundance of zooplankton during the polar night (cruise in January 2017) at 13 stations using a 64um-mesh Multinet
Citation
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. Version 1.2. UiT The Arctic University of Norway. Sampling event dataset https://doi.org/10.15468/kebuss accessed via GBIF.org on 2024-08-29.Description
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 issued in the publication of Barth-Jensen et al. 2022Sampling Description
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).Sampling
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.Method steps
- 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).
Taxonomic Coverages
-
Bopyridae
-
Isopoda
-
Meganyctiphanes norvegica
-
Thysanoessa inermis
-
Thysanoessa longicaudata
-
Thysanoessa raschii
-
Sarsia
-
Hydrozoa
-
Hydrozoa larvae
-
Dimophyes arctica
-
Siphonophorae
-
Beroe cucumis
-
Mertensia ovum
-
Nemertea pilidium
-
Pelagobia
-
Tomopteris septentrionalis
-
Echinodermata larvae
-
Bryozoa larvae
-
Fritillaria borealis
-
Decapoda
-
Amphipoda
-
Ctenophora
-
Rotifera
-
Turbelaria
-
Acartia clausii
-
Acartia longiremis
-
Aetideidae
-
Aetideopsis minor
-
Bradyidius similis
-
Calanus finmarchicus
-
Calanus glacialis
-
Calanus hyperboreus
-
Candacia armata
-
Clytmenestra scutellata
-
Ctenocalanus
-
Gaetanus tenuispinus
-
Heterorhabdus norvegicus
-
Jashnovia brevis
-
Metridia longa
-
Metridia lucensrank: species
-
Paracalanus/Clausocalanus/Ctenocalanus CIV-CV
-
Paraeuchaetarank: genus
-
Pleuromamma robustarank: species
-
Pseudocalanusrank: genus
-
Scolecithricella minorrank: species
-
Spinocalanusrank: genus
-
Calanoida nauplii
-
Cyclopoida nauplii
-
Harpacticoida nauplii
-
Clausocalanus
-
Calocalanus styliremis
-
Cyclopina schneideri
-
Harpacticoida
-
Microcalanus
-
Microsetella norvegica
-
Microsetella rosea
-
Oithona atlantica
-
Oithona similis
-
Oithona nana
-
Oncaeidae
-
Paracalanus
-
Aglantha digitale
-
Bivalvia
-
Cirripedia
-
Clione limacina
-
Erythrops erythrophthalma
-
Eukrohnia hamata
-
Euphausiacea
-
Gastropoda veliger
-
Limacina helicina
-
Limacina retroversa
-
Oikopleura
-
Ostracods
-
Polychaeta
-
Sagitta elegans
-
Themisto abyssorum
Geographic Coverages
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).
Bibliographic Citations
Contacts
Coralie Barth-Jensenoriginator
position: PhD student
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
email: coralie.barth-jensen@uit.no
userId: https://orcid.org/0000-0001-9318-2605
Malin Daase
originator
position: Researcher
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
email: malin.daase@uit.no
userId: https://orcid.org/0000-0001-8413-3924
Mateusz Ormańczyk
originator
position: Researcher
IOPAN
PL
email: ormanczyk@iopan.pl
userId: https://orcid.org/0000-0003-2343-6694
Sławomir Kwaśniewski
originator
position: Professor
IOPAN
PL
email: kwas@iopan.pl
userId: https://orcid.org/0000-0003-3104-0761
Øystein Varpe
originator
position: Professor
University in Bergen
Bergen
NO
email: oystein.varpe@uib.no
userId: https://orcid.org/0000-0002-5895-6983
Camilla Svensen
originator
position: Professor
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
email: camilla.svensen@uit.no
userId: https://orcid.org/0000-0001-9577-3935
Coralie Barth-Jensen
metadata author
position: PhD student
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
email: coralie.barth-jensen@uit.no
userId: https://orcid.org/0000-0001-9318-2605
Rukaya Johaadien
user
email: r.s.johaadien@nhm.uio.no
Camilla Svensen
author
position: Professor
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
email: camilla.svensen@uit.no
userId: http://orcid.org/0000-0001-9577-3935
Malin Daase
author
position: Researcher
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
email: malin.daase@uit.no
userId: http://orcid.org/0000-0001-8413-3924
Coralie Barth-Jensen
author
position: PhD student
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
Telephone: 77645554
email: coralie.barth-jensen@uit.no
userId: http://orcid.org/0000-0001-9318-2605
Mateusz Ormańczyk
author
position: Researcher
IOPAN
PL
email: ormanczyk@iopan.pl
userId: http://orcid.org/0000-0003-2343-6694
Sławomir Kwaśniewski
author
IOPAN
PL
email: kwas@iopan.pl
userId: http://orcid.org/0000-0003-3104-0761
Øystein Varpe
author
position: Professor
University in Bergen
Bergen
NO
email: oystein.varpe@uib.no
userId: http://orcid.org/0000-0002-5895-6983
Coralie Barth-Jensen
administrative point of contact
position: PhD student
University in Tromsø
Postboks 6050 Langnes
Tromsø
9037
NO
email: coralie.barth-jensen@uit.no
userId: https://orcid.org/0000-0001-9318-2605