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| Médium: | Dataset Open Access |
| Jazyk: | en |
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PANGAEA
2023
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| Témata: | |
| On-line přístup: | https://doi.org/10.1594/PANGAEA.960403 |
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| _version_ | 1867168519694581760 |
|---|---|
| author | Stief, Peter |
| author_facet | Stief, Peter |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. The cumulative carbon loss through aerobic respiration from sinking diatom aggregates was calculated by summing up the daily oxygen consumption rates multiplied with a respiratory quotient of 0.8 and expressing the result relative to the initial carbon contents of the respective diatom aggregate. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_960403 |
| institution | PANGAEA |
| language | en |
| publishDate | 2023 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Cumulative carbon loss through aerobic respiration from sinking diatom aggregates incubated in rotating pressure and control tanks Stief, Peter biological carbon pump; Carbon loss through respiration, cumulative; Date/time end, experiment; Date/time start, experiment; Deep sea; Diatom; Digital manometer, Keller AG, LEO5; Experiment; Experimental treatment; HADAL_aggregates; Hadal trench; hydrostatic pressure; Laboratory; Laboratory experiment; lipids; marine carbon cycle; marine snow; microbial community; Optical Oxygen Meter (FireSting, PyroScience GmbH, Germany); Pigments; Replicate; Respiration; Treatment: pressure; Treatment: time after; Type of study 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. The cumulative carbon loss through aerobic respiration from sinking diatom aggregates was calculated by summing up the daily oxygen consumption rates multiplied with a respiratory quotient of 0.8 and expressing the result relative to the initial carbon contents of the respective diatom aggregate. |
| title | Cumulative carbon loss through aerobic respiration from sinking diatom aggregates incubated in rotating pressure and control tanks |
| topic | biological carbon pump; Carbon loss through respiration, cumulative; Date/time end, experiment; Date/time start, experiment; Deep sea; Diatom; Digital manometer, Keller AG, LEO5; Experiment; Experimental treatment; HADAL_aggregates; Hadal trench; hydrostatic pressure; Laboratory; Laboratory experiment; lipids; marine carbon cycle; marine snow; microbial community; Optical Oxygen Meter (FireSting, PyroScience GmbH, Germany); Pigments; Replicate; Respiration; Treatment: pressure; Treatment: time after; Type of study |
| url | https://doi.org/10.1594/PANGAEA.960403 |