Piontek, Judith; Hassenrück, Christiane; Jürgens, Klaus (2021): Bacterial biomass production measured in water samples of POLARSTERN cruise PS111 (ANT-XXXIII/2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.938700
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Abstract:
Global warming poses new threats to marine ecosystems since rising seawater temperature potentially induces cascading effects in biogeochemical cycles and food webs. Heterotrophic bacteria are the main producers of CO2 in the ocean, thereby counteracting the biological drawdown of CO2 by primary production. In Antarctic marine systems, low seawater temperature, and the low availability of labile organic matter are major environmental constraints on bacterial growth and degradation activity. However, temperature and the availability of resources for heterotrophic bacteria undergo considerable change induced by climate warming combined with subsequent ice melt and changes in primary productivity. This project aims to test single and combined effects of temperature and organic matter availability on Antarctic marine bacterioplankton. This data set includes measurements on bacterial biomass production at 0°C and 3°C measured alongside the CTD casts during the Polarstern cruise PS111 to the Weddell Sea. Samples were collected in the upper 100 m of the water column at the Eastern Weddell Sea Shelf and at the Filchner-Ronne ice shelf.
Related to:
Janout, Markus A; Hellmer, Hartmut H; Schröder, Michael; Wisotzki, Andreas (2019): Physical oceanography measured on water bottle samples during POLARSTERN cruise PS111 (ANT-XXXIII/2). Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.897283
Piontek, Judith; Meeske, Christian; Hassenrück, Christiane; Engel, Anja; Jürgens, Klaus (2022): Organic matter availability drives the spatial variation in the community composition and activity of Antarctic marine bacterioplankton. Environmental Microbiology, https://doi.org/10.1111/1462-2920.16087
Schröder, Michael (2018): The Expedition PS111 of the Research Vessel POLARSTERN to the southern Weddell Sea in 2018. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 718, 161 pp, https://doi.org/10.2312/BzPM_0718_2018
Project(s):
Funding:
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Median Latitude: -74.186355 * Median Longitude: -31.693766 * South-bound Latitude: -77.820838 * West-bound Longitude: -60.001585 * North-bound Latitude: -63.999757 * East-bound Longitude: 4.999871
Date/Time Start: 2018-01-26T09:46:00 * Date/Time End: 2018-03-01T11:26:00
Minimum DEPTH, water: 0.8 m * Maximum DEPTH, water: 100.5 m
Event(s):
PS111_9-3 * Latitude: -63.999757 * Longitude: 4.999871 * Date/Time: 2018-01-26T09:46:00 * Elevation: -3849.0 m * Location: South Atlantic Ocean * Campaign: PS111 (ANT-XXXIII/2) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO)
PS111_10-2 * Latitude: -65.385260 * Longitude: 2.567105 * Date/Time: 2018-01-26T21:22:00 * Elevation: -2092.0 m * Location: South Atlantic Ocean * Campaign: PS111 (ANT-XXXIII/2) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO)
PS111_12-2 * Latitude: -66.738849 * Longitude: -0.038670 * Date/Time: 2018-01-27T09:00:00 * Elevation: -4698.0 m * Location: Lazarev Sea * Campaign: PS111 (ANT-XXXIII/2) * Basis: Polarstern * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Piontek, Judith | |||
| 2 | Sample ID | Sample ID | Piontek, Judith | Sample title used in molecular submission and organic matter measurements | ||
| 3 | DEPTH, water | Depth water | m | Piontek, Judith | Geocode | |
| 4 | Incubation temperature | Inc Temp | °C | Piontek, Judith | ||
| 5 | Bacterial production | BP | pmol/l/h | Piontek, Judith | Incorporation of 14C-leucine (Simon and Azam, 1989, http://www.int-res.com/articles/meps/51/m051p201.pdf; Simon et al. 2004, doi:10.4319/lo.2004.49.4.1035) | |
| 6 | Bacterial production | BP | µg/l/day | Piontek, Judith | Estimated | Using a conversion factor of 1.5 kg C mol leucine-1, assuming no intracellular isotope dilution (Simon and Azam, 1989) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2548 data points
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