Pressure-induced leakage of dissolved organic matter (DOM) from diatom-bacteria aggregates
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2025
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| _version_ | 1867171893952380928 |
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| author | Stief, Peter |
| author_facet | Stief, Peter |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Model diatom aggregates were produced from the diatom Skeletonema marinoi and the natural microbial community of seawater collected in Oeresund (Stief et al. 2023), Central Arctic Ocean, and Japan Trench. S. marinoi was grown to stationary phase in L1 medium plus silicate (Guillard & Hargraves 1993) at 15°C under a light/dark regime of 14/10 h. The diatom aggregates were individually incubated at either atmospheric pressure (0.1 MPa = control treatment) or at gradually increasing hydrostatic pressure (0.1-100 MPa = pressure treatment) throughout 20 days in darkness and at 3°C. The pressure treatment simulated the sinking of diatom-bacteria aggregates from the ocean surface down into a hadal trench of 10 km depth. Pressure-induced leakage of dissolved organic matter (DOM) was followed throughout the incubations. Ambient concentrations of different DOM components were measured: Dissolved organic carbon (DOC), total dissolved nitrogen (TDN), protein-like and humic-like DOM fluorescence. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_974878 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Pressure-induced leakage of dissolved organic matter (DOM) from diatom-bacteria aggregates Stief, Peter ArcWatch-1; Carbon, organic, dissolved; CTD/Rosette; CTD-RO; culture experiment; Date/time end, experiment; Date/time start, experiment; diatoms; DOM; Event label; Fluorescence, humic-like, component; Fluorescence, protein-like, component; Fluorescence spectrometer, AquaLog, HORIBA JobinYvon; hydrostatic pressure; Laboratory experiment; leakage; marine snow; Nitrogen, total dissolved; Polarstern; PS138; PS138_218-1; Sample code/label; Species, unique identification; Species, unique identification (Semantic URI); Species, unique identification (URI); SW_072021; SW_102021; SW_102022; Total organic carbon analyzer, Shimadzu, TOC-L; Treatment: duration; Treatment: pressure; Type of study; UM23-06; UM23-06_173.5; Umitaka Maru Model diatom aggregates were produced from the diatom Skeletonema marinoi and the natural microbial community of seawater collected in Oeresund (Stief et al. 2023), Central Arctic Ocean, and Japan Trench. S. marinoi was grown to stationary phase in L1 medium plus silicate (Guillard & Hargraves 1993) at 15°C under a light/dark regime of 14/10 h. The diatom aggregates were individually incubated at either atmospheric pressure (0.1 MPa = control treatment) or at gradually increasing hydrostatic pressure (0.1-100 MPa = pressure treatment) throughout 20 days in darkness and at 3°C. The pressure treatment simulated the sinking of diatom-bacteria aggregates from the ocean surface down into a hadal trench of 10 km depth. Pressure-induced leakage of dissolved organic matter (DOM) was followed throughout the incubations. Ambient concentrations of different DOM components were measured: Dissolved organic carbon (DOC), total dissolved nitrogen (TDN), protein-like and humic-like DOM fluorescence. |
| title | Pressure-induced leakage of dissolved organic matter (DOM) from diatom-bacteria aggregates |
| topic | ArcWatch-1; Carbon, organic, dissolved; CTD/Rosette; CTD-RO; culture experiment; Date/time end, experiment; Date/time start, experiment; diatoms; DOM; Event label; Fluorescence, humic-like, component; Fluorescence, protein-like, component; Fluorescence spectrometer, AquaLog, HORIBA JobinYvon; hydrostatic pressure; Laboratory experiment; leakage; marine snow; Nitrogen, total dissolved; Polarstern; PS138; PS138_218-1; Sample code/label; Species, unique identification; Species, unique identification (Semantic URI); Species, unique identification (URI); SW_072021; SW_102021; SW_102022; Total organic carbon analyzer, Shimadzu, TOC-L; Treatment: duration; Treatment: pressure; Type of study; UM23-06; UM23-06_173.5; Umitaka Maru |
| url | https://doi.org/10.1594/PANGAEA.974878 |