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Stief, Peter; Schauberger, Clemens; Becker, Kevin W; Elvert, Marcus; Balmonte, John Paul; Franco-Cisterna, Belén; Middelboe, Mathias; Glud, Ronnie N (2023): Effects of increasing hydrostatic pressure on sinking diatom aggregates [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.960357

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Published: 2023-08-11 • DOI registered: 2023-09-09

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Abstract:
The effect of increasing hydrostatic pressure on the microbial degradation, the organic matter composition, and the microbiome of 'marine snow' particles was studied in laboratory incubation experiments. Model aggregates were produced from the diatom Skeletonema marinoi and the natural microbial community of surface seawater collected in the Kattegat. The aggregates were incubated individually in rotating pressure and control tanks to keep them suspended during 20-day incubations in the dark and at 3°C. In the pressure tanks, hydrostatic pressure was increased at increments of 5 MPa per day to finally reach 100 MPa. This pressure scheme simulates the descent of diatom aggregates from the surface ocean down into a 10-km deep hadal trench. In the control tanks, pressure always remained at atmospheric level. Aerobic respiration was continuously measured as a proxy for oxidative carbon mineralization in the aggregates (Stief et al. 2021, https://doi.org/10.1002/lno.11791). Leakage of dissolved organic carbon was monitored as an additional carbon loss term. The contents of different diatom lipids and photopigments were measured throughout the incubation. The succession of microbial (mainly bacterial) communities associated with the sinking diatom aggregates was followed by 16S rRNA gene amplicon sequencing throughout the incubation; the corresponding data are deposited in the NCBI short-read archive under the accession number PRJNA976707.
Keyword(s):
biological carbon pump; Deep sea; Diatom; Hadal trench; hydrostatic pressure; lipids; marine carbon cycle; marine snow; microbial community; Pigments; Respiration
Supplement to:
Stief, Peter; Schauberger, Clemens; Becker, Kevin W; Elvert, Marcus; Balmonte, John Paul; Franco-Cisterna, Belén; Middelboe, Mathias; Glud, Ronnie N (2023): Hydrostatic pressure induces transformations in the organic matter and microbial community composition of marine snow particles. Communications Earth & Environment, 4(1), 377, https://doi.org/10.1038/s43247-023-01045-4
Related to:
Schauberger, Clemens (submitted): Pressure-induced transformations of marine snow during an experimentally simulated descent to the deep ocean [dataset]. National Center for Biotechnology Infomration (NCBI), https://www.ncbi.nlm.nih.gov/bioproject/?term=PRJNA976707
Funding:
Danish National Research Foundation (DG), grant/award no. DNRF145: Danish Center for Hadal Research, HADAL
Coverage:
Latitude: 55.368167 * Longitude: 10.426563
Date/Time Start: 2021-07-27T13:48:26 * Date/Time End: 2022-11-02T08:27:14
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
15 datasets

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Datasets listed in this bundled publication

  1. Stief, P; Middelboe, M (2023): Microbial cell abundance in sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960471
  2. Stief, P (2023): Cumulative carbon loss through leakage of dissolved organic carbon (DOC) from sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960465
  3. Stief, P (2023): Cumulative carbon loss through aerobic respiration from sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960403
  4. Stief, P (2023): Cumulative total carbon loss through aerobic respiration and leakage of dissolved organic carbon (DOC) from sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960506
  5. Stief, P (2023): Leakage of dissolved organic carbon (DOC) and photopigments from the diatom Skeletonema marinoi incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960473
  6. Stief, P (2023): Leakage of dissolved organic carbon (DOC) from settled Skeletonema marinoi cells incubated in pressure and control tanks. https://doi.org/10.1594/PANGAEA.960474
  7. Stief, P (2023): Dissolved organic carbon (DOC) concentrations in the water surrounding sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960464
  8. Balmonte, JP; Franco-Cisterna, B (2023): Exoenzyme activities associated with sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960472
  9. Stief, P; Middelboe, M (2023): Abundance of free-living microorganisms in the water surrounding sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960509
  10. Becker, KW; Elvert, M (2023): Lipid contents in sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960466
  11. Becker, KW; Elvert, M (2023): Average unsaturation degree (AUD) of lipids in sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960507
  12. Stief, P (2023): Oxygen concentrations in the water surrounding sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960360
  13. Stief, P (2023): Oxygen consumption rate of sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960401
  14. Stief, P (2023): Photopigment contents in sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960470
  15. Stief, P (2023): Degraded photopigment contents in sinking diatom aggregates incubated in rotating pressure and control tanks. https://doi.org/10.1594/PANGAEA.960508