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Bahl, Alexis A; Lüskow, Florian; Konrad, Christian; Iversen, Morten Hvitfeldt; Pakhomov, Evgeny A: Southern Ocean zooplankton community abundance from paired net (RMT-8, IKMT), RV Polarstern expedition PS133/1, austral spring 2022 – Net [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996153 (dataset in review)

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Abstract:
This dataset contains paired net-based and optical-imaging observations of meso- and macrozooplankton collected in the Atlantic sector of the Southern Ocean (45–67°S, 10–42°W) during RV Polarstern expedition PS133/1 in austral spring 2022. Net samples were collected with a Rectangular Midwater Trawl (RMT-8; mouth area 8 m², 4.5 mm mesh; 0–600 m) and an Isaacs-Kidd Midwater Trawl (IKMT; mouth area 2.5 m², 0.5 mm mesh; upper ~200 m) as double-oblique tows, yielding taxon-resolved volumetric abundances (individuals per 1000 m³) at 14 stations. In situ optical observations were obtained with JellyCam, a low-light imaging system mounted on the ROSINA (Remotely Observing in situ Camera for Aggregates) platform, providing depth-resolved (1-m) counts of 12 taxonomic groups at six stations, each profiled with a paired downcast and upcast. The data were generated to quantify the systematic underestimation of fragile gelatinous zooplankton by net-based sampling relative to optical imaging, and to compare community composition and vertical structure across gears. Salpa thompsoni size and developmental-stage data from the same net tows are archived separately (doi:10.1594/PANGAEA.973501); the ship CTD-Rosette physical oceanography is archived in doi:10.1594/PANGAEA.962314. Derived nearest-CTD environmental values matched to each biological sample are provided as supplementary material with the associated article rather than in this dataset.
Keyword(s):
gelatinous zooplankton; net sampling; optical imaging; Southern Ocean; zooplankton community
Related to:
Pakhomov, Evgeny A; Mole, Ryan; Bahl, Alexis A; von Appen, Wilken-Jon; Lüskow, Florian (2024): Characteristics of the thaliacean Salpa thompsoni population in the Atlantic sector of the Southern Ocean in early spring [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.973501
Tippenhauer, Sandra; Klaas, Christine; Kasten, Sabine (2023): Raw data of physical oceanography during RV POLARSTERN cruises PS133/1 and PS133/2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.962314
Funding:
National Geographic Society (NGS), grant/award no. EC-92353R-22: Examining the world's largest migration in a changing Southern Ocean
Coverage:
Median Latitude: -51.966883 * Median Longitude: -31.482240 * South-bound Latitude: -56.369150 * West-bound Longitude: -41.734800 * North-bound Latitude: -49.052500 * East-bound Longitude: -9.992150
Date/Time Start: 2022-10-14T00:00:00 * Date/Time End: 2022-11-09T00:00:00
Minimum Elevation: -7779.2 m * Maximum Elevation: -239.5 m
Event(s):
PS133/1_3-10 * Latitude Start: -49.067520 * Longitude Start: -9.988800 * Latitude End: -49.018560 * Longitude End: -9.992620 * Date/Time Start: 2022-10-14T02:45:00 * Date/Time End: 2022-10-14T04:17:49 * Elevation Start: -3291.3 m * Elevation End: -3337.0 m * O2A Registry URI: https://registry.o2a-data.de/items/3235 * Campaign: PS133/1 (Island Impact) * Basis: Polarstern * Method/Device: Rectangular midwater trawl (RMT) * Comment: Deployment depth: 603 m
PS133/1_5-5 * Latitude Start: -54.003170 * Longitude Start: -24.992980 * Latitude End: -53.995380 * Longitude End: -25.030330 * Date/Time Start: 2022-10-20T23:41:08 * Date/Time End: 2022-10-21T00:46:18 * Elevation Start: -4699.8 m * Elevation End: -4704.6 m * O2A Registry URI: https://registry.o2a-data.de/items/3174 * Campaign: PS133/1 (Island Impact) * Basis: Polarstern * Method/Device: Isaacs-Kidd Midwater Trawl (IKMT) * Comment: Deployment depth: 200 m
PS133/1_6-11 * Latitude Start: -52.324200 * Longitude Start: -24.970670 * Latitude End: -52.300300 * Longitude End: -25.002550 * Date/Time Start: 2022-10-22T10:43:59 * Date/Time End: 2022-10-22T11:48:38 * Elevation Start: -4361.8 m * Elevation End: -4144.0 m * O2A Registry URI: https://registry.o2a-data.de/items/3235 * Campaign: PS133/1 (Island Impact) * Basis: Polarstern * Method/Device: Rectangular midwater trawl (RMT) * Comment: Deployment depth: 620 m
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventBahl, Alexis A
2Depth, water, bottom/maximumDepth water botmBahl, Alexis A
3DATE/TIMEDate/TimeBahl, Alexis AGeocode
4LATITUDELatitudeBahl, Alexis AGeocode
5LONGITUDELongitudeBahl, Alexis AGeocode
6Station labelStationBahl, Alexis A
7GearGearBahl, Alexis A
8Time of dayTime of dayBahl, Alexis A
9Temperature, waterTemp°CBahl, Alexis Asurface
10SalinitySalBahl, Alexis Asurface
11PhylumPhylumBahl, Alexis A
12ClassClassBahl, Alexis A
13OrderOrderBahl, Alexis A
14GenusGenusBahl, Alexis A
15SpeciesSpeciesBahl, Alexis A
16Species, unique identificationSpecies UIDBahl, Alexis A
17Species, unique identification (Semantic URI)Species UID (Semantic URI)Bahl, Alexis A
18Species, unique identification (URI)Species UID (URI)Bahl, Alexis A
19Number of individualsInd No#Bahl, Alexis A
20AbundanceAbund#/1000 m3Bahl, Alexis A
21FractionFractionBahl, Alexis A
22Water volume, filteredVol filteredm3Bahl, Alexis A
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
85624 data points

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