Sea-ice meiofauna biodiversity from the Nansen Legacy joint cruise JC2-2 (cruise number: 2021710)
Citation
Marquardt M, Bluhm B, Gradinger R (2024). Sea-ice meiofauna biodiversity from the Nansen Legacy joint cruise JC2-2 (cruise number: 2021710). Version 1.8. The Nansen Legacy Project. Sampling event dataset https://doi.org/10.15468/dfz5gb accessed via GBIF.org on 2024-12-03.Description
The data was collected during the Nansen Legacy joint cruise (JC2-2, cruise number: 2021710) from 24.08 - 25.09.2021 onboard the research vessel RV Kronprins Haakon, along a transect in the Arctic Basin from 81N to 87N. The dataset contains abundance and biomass of sea-ice meiofauna (> 20 µm) including large protists such as foraminifers and ciliates and metazoans eggs. Sea-ice meiofauna were identified and counted with stereo microscopy and result are given as Individuals per liter (cells/L) and Individuals per square meter (Ind/m2). Biomass (μg C Ind.-1) was only determined for alive individuals according to carbon contents for ice meiofauna taxa based on literature summarized in Ehrlich et al. (2021, doi: https://doi.org/10.1525/elementa.2020.00169), and carbon values for foraminifers were provided by de Freitas et al. (2021) for benthic species (Bolivinia sp.: 0.00875 μg C Ind.-1; Elphidium sp.: 0.126 μg C Ind.-1, https://doi.org/10.2113/gsjfr.51.4.249) and Anglada-Ortiz et al. (submitted to PiO) for the pelagic species Neogloboquadrina pachyderma (0.0013 μg C Ind.-1).Sampling Description
Study Extent
The data was collected during the Nansen Legacy joint cruise (JC2-2, cruise number: 2021710) from 24.08 - 25.09.2021 onboard the research vessel RV Kronprins Haakon, along a transect in the Arctic Basin from 81N to 87N. Ice cores were taken at three ice covered station.Sampling
At ice covered stations, ice cores were taken for the determination of abundance and biomass of sea-ice meiofauna and protists (lowermost 30 cm). Ice cores were taken from undeformed level ice areas with a KOVACS ice corer (Mark II coring system, diameter 9 cm) and were cut on a cutting board into the following sections, given as distance from the ice-water interface: 0-3 cm (bottom ice layer), 3-10 cm, 10-20 cm, 20-30 cm. All sea-ice core sections were melted in the dark and at 4°C within 24-28 h to and to reduce negative impacts related to osmotic stress 100 ml filtered seawater (< 0.22 µm) was initially added per 1 cm section.More detailed sampling procedure you find in the Nansen Legacy sampling protocol V10 chapter 14: Link: https://septentrio.uit.no/index.php/nansenlegacy/article/view/6684 Citation: The Nansen Legacy (2022). Sampling Protocols: Version 10. The Nansen Legacy Report Series 32/2022. DOI: https://doi.org/10.7557/nlrs.6684
Method steps
- Sea-ice meiofauna were identified and counted with stereo microscopy and result are given as Individuals per liter (cells/L) and Individuals per square meter (Ind/m2). Biomass (μg C Ind.-1) was only determined for alive individuals according to carbon contents for ice meiofauna taxa based on literature summarized in Ehrlich et al. (2021, doi: https://doi.org/10.1525/elementa.2020.00169), and carbon values for foraminifers were provided by de Freitas et al. (2021) for benthic species (Bolivinia sp.: 0.00875 μg C Ind.-1; Elphidium sp.: 0.126 μg C Ind.-1, https://doi.org/10.2113/gsjfr.51.4.249) and Anglada-Ortiz et al. (submitted to PiO) for the pelagic species Neogloboquadrina pachyderma (0.0013 μg C Ind.-1).
Taxonomic Coverages
N/A
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Ectinosomidaerank: family
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Chromistarank: kingdom
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Litostomatearank: class
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Didiniidaerank: family
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Arthropodarank: phylum
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Copepodarank: class
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Haptoridarank: order
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Harpacticoidarank: order
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Ciliophorarank: phylum
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Animaliarank: kingdom
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Xenacoelomorpharank: phylum
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Acoelarank: order
Geographic Coverages
The data was collected during the Nansen Legacy joint cruise (JC2-2, cruise number: 2021710) from 24.08 - 25.09.2021 onboard the research vessel RV Kronprins Haakon, along a transect in the Arctic Basin from 81N to 87N.
Bibliographic Citations
Contacts
Miriam Marquardtoriginator
position: Chief engineer
UiT Arctic University of Norway
Tromsø
NO
email: miriam.marquardt@uit.no
userId: https://orcid.org/0000-0003-2913-067X
Bodil Bluhm
originator
position: Professor
UiT Arctic University of Norway
Tromsø
NO
email: bodil.bluhm@uit.no
userId: https://orcid.org/0000-0002-4584-7796
Rolf Gradinger
originator
position: Professor
UiT Arctic University of Norway
Tromsø
NO
email: rolf.gradinger@uit.no
userId: https://orcid.org/0000-0001-6035-3957
Miriam Marquardt
user
email: miriam.marquardt@uit.no
Miriam Marquardt
administrative point of contact
position: Chief engineer
UiT Arctic University of Norway
Tromsø
NO
email: miriam.marquardt@uit.no
userId: https://orcid.org/0000-0003-2913-067X