Oxygen consumption rate of sinking diatom aggregates incubated in rotating pressure and control tanks

DOI

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 was always left at atmospheric level.Volumetric oxygen consumption rates of sinking diatom aggregates were calculated from the temporal change in oxygen concentration in the water surrounding the aggregates and the individual aggregate volume and served as a proxy for aerobic microbial aggregate degradation.

Identifier
DOI https://doi.org/10.1594/PANGAEA.960401
Related Identifier https://doi.org/10.1594/PANGAEA.960357
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.960401
Provenance
Creator Stief, Peter (ORCID: 0000-0002-6355-150X)
Publisher PANGAEA
Publication Year 2023
Funding Reference Danish National Research Foundation https://doi.org/10.13039/501100001732 Crossref Funder ID DNRF145 Danish Center for Hadal Research, HADAL
Rights Data access is restricted (moratorium, sensitive data, license constraints)
OpenAccess false
Representation
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 2940 data points
Discipline Earth System Research
Spatial Coverage (10.427 LON, 55.368 LAT)
Temporal Coverage Begin 2021-07-27T13:48:26Z
Temporal Coverage End 2022-11-02T08:27:14Z