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  • Data  (65)
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  • 1
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    Study on the effects of near-future ocean acidification on marine yeasts: a microcosm approach
    PANGAEA
    In:  Supplement to: Krause, Evamaria; Wichels, Antje; Erler, Rene; Gerdts, Gunnar (2013): Study on the effects of near-future ocean acidification on marine yeasts: a microcosm approach. Helgoland Marine Research, 67(4), 607-621, https://doi.org/10.1007/s10152-013-0348-1
    Details
    Publication Date: 2023-05-12
    Description: Marine yeasts play an important role in biodegradation and nutrient cycling and are often associated with marine flora and fauna. They show maximum growth at pH levels lower than present-day seawater pH. Thus, contrary to many other marine organisms, they may actually profit from ocean acidification. Hence, we conducted a microcosm study, incubating natural seawater from the North Sea at present-day pH (8.10) and two near-future pH levels (7.81 and 7.67). Yeasts were isolated from the initial seawater sample and after 2 and 4 weeks of incubation. Isolates were classified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and representative isolates were identified by partial sequencing of the large subunit rRNA gene. From the initial seawater sample, we predominantly isolated a yeast-like filamentous fungus related to Aureobasidium pullulans, Cryptococcus sp., Candida sake, and various cold-adapted yeasts. After incubation, we found more different yeast species at near-future pH levels than at present-day pH. Yeasts reacting to low pH were related to Leucosporidium scottii, Rhodotorula mucilaginosa, Cryptococcus sp., and Debaryomyces hansenii. Our results suggest that these yeasts will benefit from seawater pH reductions and give a first indication that the importance of yeasts will increase in a more acidic ocean.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification; North Atlantic
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 2
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    Microplastic and environmental data from Arctic sea ice (2018)
    PANGAEA
    In:  Supplement to: Peeken, Ilka; Primpke, Sebastian; Beyer, Birte; Guetermann, Julia; Katlein, Christian; Krumpen, Thomas; Bergmann, Melanie; Hehemann, Laura; Gerdts, Gunnar (2018): Arctic sea ice is an important temporal sink and means of transport for microplastic. Nature Communications, 9(1), https://doi.org/10.1038/s41467-018-03825-5
    Details
    Publication Date: 2023-01-13
    Description: Microplastics (MP) are recognized as a growing environmental hazard and have been identified as far as the remote Polar Regions, with particularly high concentrations of microplastics in sea ice. Little is known regarding the horizontal variability of MP within sea ice and how the underlying water body affects MP composition during sea ice growth. Here we show that sea ice MP has no uniform polymer composition and that, depending on the growth region and drift paths of the sea ice, unique MP patterns can be observed in different sea ice horizons. Thus even in remote regions such as the Arctic Ocean, certain MP indicate the presence of localized sources. Increasing exploitation of Arctic resources will likely lead to a higher MP load in the Arctic sea ice and will enhance the release of MP in the areas of strong seasonal sea ice melt and the outflow gateways.
    Keywords: Acrylonitrile butadiene; Arctic Ocean; ARK-XXIX/1, TRANSSIZ; ARK-XXIX/3; ARK-XXVIII/2; Campaign; Carbon, organic, particulate; Carbon/Nitrogen ratio; Cellulose acetate; Chlorinated polyethylene; Chlorophyll a; Cruise/expedition; Date/Time of event; DEPTH, ice/snow; Ethylene-vinyl acetate; Event label; ICE; Ice station; Ice type; Identification; Latitude of event; Longitude of event; Nitrile rubber; Nitrogen, organic, particulate; North Greenland Sea; Particle concentration; Particle concentration, error; Percentage; Polarstern; Polyamide; Polycaprolactone; Polycarbonate; Polyester; Polyethylene; Polyimide; Polylactic acid; Polypropylene; Polystyrene; Polyvinyl chloride; Project; PS85; PS85/426-3; PS85/472-2; PS92; PS92/032-4; PS92/039-6; PS94; PS94/054-1; Rubber; Sea ice salinity; Station label; Temperature, ice/snow; Varnish
    Type: Dataset
    Format: text/tab-separated-values, 2758 data points
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  • 3
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    Microplastic in snow from European and Arctic sites (2019)
    PANGAEA
    In:  Supplement to: Bergmann, Melanie; Mützel, Sophia; Primpke, Sebastian; Tekman, Mine Banu; Trachsel, Jürg; Gerdts, Gunnar (2019): White and wonderful? Microplastics prevail in snow from the Alps to the Arctic. Science Advances, 5(8), eaax1157, https://doi.org/10.1126/sciadv.aax1157
    Details
    Publication Date: 2023-01-30
    Description: We analysed microplastic and fibers in snow samples from ice floes in the Fram Strait (2016/17) and from Spitsbergen, Helgoland, Bremen, Bavaria and the Swiss Alps (2018) to assess the role of atmospheric transport of microplastic to the North. Identification of particles was carried out without pre-treatment of samples. MPs were identified by Fourier-Transform Infrared Imaging in 20 of 21 samples. The MP concentration of Arctic was significantly lower (0-14.4 × 103 N L-1) than European snow (0.19-154 × 103 N L-1) but still substantial. Polymer composition varied strongly, but varnish, rubber, polyethylene and polyamide dominated overall. Most particles were in the smallest size range with no saturation, implying that there are yet smaller particles beyond the current detection limit of 11 µm. All samples contained fibers but the proportion of microplastic fibers is uncertain as fibers could not be analysed with the current methodology.
    Keywords: Acrylonitrile butadiene; Animal fur; ARK-XXX/1.2; ARK-XXXI/2; ARK-XXXI/3; Bavaria; Bavaria 1; Bavaria 2; Bavaria 3; BavariaSnow_1; BavariaSnow_2; BavariaSnow_3; Bremen; BremenSnow; Calculated; Campaign; Cellulose chemical modified; Charcoal; Chitin; Chlorinated polyethylene; Coal; Date/Time of event; Davos; DavosCLEAN_3; DavosDIRTY_3; Davos village; Depth, bottom/max; DEPTH, ice/snow; Depth, top/min; Error, relative; Ethylene-vinyl acetate; Event label; Fibre concentration; Fibre fallout, annual mean; Fibres; Fourier transform infrared imaging; Fram Strait; Fredheim; FTIR; Helgoland; HelgoSnow_1; HelgoSnow_2; Heligoland; Heligoland 1; Heligoland 2; Ice floe 1; Ice floe 2; Ice floe 3; Ice floe 4; Ice floe 5; Ice floe 6; Ice floe 7; Ice floe 8; Ice floe 9; Kapp_Amsterdam; Latitude of event; Location; Longitude of event; Longyearbyen; Microplastic fallout, annual mean; Microplastics; Mohnbukta; Nitrile rubber; Number; Optical microscopy; Particle concentration; Particles; Paulabreen; Percentage; Plant fibre; Plastic particle concentration; Plastic particles; Polarstern; Polyamide; Polybutadiene; Polycaprolactone; Polycarbonate; Polychloroprene; Polyester; Polyether ether ketone; Polyethylene; Polyethylene oxidized; Polyimide; Polyisoprene chlorinated; Polylactic acid; Polymer, other; Polymer particle concentration; Polymer particles; Polyoxymethylene; Polypropylene; Polystyrene; Polysulfone; Polyvinyl chloride; PS107; PS107_G2-S1; PS108; PS108_Arctis_0001; PS108_Arctis_0002; PS108_Arctis_0003; PS108_Arctis_0004; PS108_Arctis_0005; PS99.2; PS99.2_EG1#2; PS99.2_HGIX; PS99.2_st1; Rubber; Sample code/label; Sample code/label 2; Sample comment; Sample ID; Sample volume; Sand; snow; SNOW; Snow/ice sample; Snow water equivalent; Svalbard; Svalbard 1; Svalbard 2; Svalbard 3; Svalbard 4; Svalbard 5; Swiss Alps; Temperature, air; Temperature, air, maximum; Temperature, air, minimum; Tschuggen; Volume; Wind speed; Wind speed, maximum; Wind speed, minimum
    Type: Dataset
    Format: text/tab-separated-values, 5125 data points
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  • 4
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    Abundances of small microplastics (S-MP, 11-500 µm) in surface waters of the Weser estuary and the German North Sea (April 2018) (2021)
    PANGAEA
    Details
    Publication Date: 2023-06-10
    Description: In order to assess pollution with small microplastics (S-MP, 11-500 µm) in the Lower Weser and transition to the German North Sea, surface water samples were collected with the RV Otzum (ICBM, Institute for Chemistry and Biology of the Marine Environment), as well as with the RV Uthörn (AWI, Alfred-Wegener-Institute) in April 2018. Sampling was performed using a pumping system containing of a floating suction basket (mesh size: 500 µm) for pre-filtration, followed by the concentration onto a 15 µm stainless steel screen. Samples were isolated from the filter screens in the laboratory, thoroughly processed and measured via µFTIR imaging. Dominant polymer type in the S-MP sample fraction was acrylates/polyurethanes/varnish, and concentrations ranged between 2.3 × 10¹ and 9.7 × 10³ m⁻³, with maximum values in the area of the turbidity Maximum Zone of the River Weser.
    Keywords: Acrylates, polyurethanes, varnish; Acrylonitrile butadiene; Cellulose chemical modified; Chlorinated polyethylene; DATE/TIME; Duration; Ethylene-vinyl acetate; Event label; Freshwater system; ICBM_Ot1804; Infrared Spectroscopy; Jade Bay; LATITUDE; Location; LONGITUDE; Method comment; Microplastic abundance; Microplastics; Mikroplastikkontamination im Modellsystem Weser – Nationalpark Wattenmeer: ein ökosystemübergreifender Ansatz; Nitrile rubber; North Sea margin; O_10_16; O_10_18; O_10_37; O_10_39; O_10_41; O_10_43; O_10_45; O_10_47; O_10_48; O_10_49; O_10_50; O_10_51; O_10_52; O_10_53; Otzum; Plastic pollution; PLAWES; Polyamide; Polycaprolactone; Polycarbonate; Polyester; Polyether ether ketone; Polyethylene; Polylactic acid; Polyoxymethylene; Polypropylene; Polystyrene; Polysulfone; Polyvinyl chloride; Project; river; Rubber; Sample volume; U_10_19; U_10_20; U_10_30; U_10_30a; U_10_30b; U_10_30d; U_10_31; U_10_33; U_10_34; UT04/2018; Uthörn; Water sample; Weser, Germany, Europe; WS
    Type: Dataset
    Format: text/tab-separated-values, 598 data points
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  • 5
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    Station list and links to master tracks in different resolutions of HEINCKE cruise HE384, Bremerhaven - Helgoland, 2012-07-05 - 2012-07-20 (2015)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-01-12
    Keywords: Calculated; Course; CT; DATE/TIME; HE384; HE384-track; Heincke; LATITUDE; LONGITUDE; North Sea; Speed; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 4606 data points
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  • 6
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    Abundances of large microplastics (L-MP, 500-5000 µm) in surface waters of the Weser estuary and the German North Sea (April 2018) (2021)
    PANGAEA
    Details
    Publication Date: 2024-02-26
    Description: In order to assess pollution with large microplastics (L-MP, 500-5000 µm) in the Lower Weser and transition to the German North Sea, surface water samples were collected with the RV Otzum (ICBM, Institute for Chemistry and Biology of the Marine Environment), as well as with the RV Uthörn (AWI, Alfred-Wegener-Institute) in April 2018. Sampling was performed using a microplastic net (mesh size: 300 µm), followed by filtration in the laboratory over a 500 µm stainless steel sieve. Putative MP items in the size range 500-5000 µm were analysed by means of Attenuated Total Reflection - FTIR in order to determine the underlying synthetic polymer. Dominant polymer type in the L-MP sample fraction was polyethylene. Concentrations ranged between 1 × 10⁻² m⁻³ and 9.8 × 10⁻¹ m⁻³. The highest MP concentration was measured upstream the Weser Weir.
    Keywords: Acrylates, polyurethanes, varnish; Attenuated Total Reflection – Fourier Transform Infrared Spectroscopy (ATR-FTIR); DATE/TIME; Duration; Ethylene-propylene; Ethylene-vinyl acetate; Ethylene vinyl alcohol; Event label; Freshwater system; ICBM_Ot1804; Infrared Spectroscopy; Jade Bay; LATITUDE; Location; LONGITUDE; Method comment; Microplastic abundance; Microplastics; Mikroplastikkontamination im Modellsystem Weser – Nationalpark Wattenmeer: ein ökosystemübergreifender Ansatz; North Sea margin; O_300_16; O_300_18; O_300_37; O_300_39; O_300_41; O_300_43; O_300_45; O_300_47; O_300_48; O_300_49; O_300_50; O_300_51; O_300_52; O_300_53; Otzum; Plastic pollution; PLAWES; Polyamide; Polyester; Polyethylene; Polyethylene oxidized; Polymer, other; Polypropylene; Polystyrene; Project; river; Rubber; Sample volume; U_300_19; U_300_20; U_300_30; U_300_30a; U_300_30b; U_300_30d; U_300_31; U_300_33; U_300_34; UT04/2018; Uthörn; Water sample; Weser, Germany, Europe; WS
    Type: Dataset
    Format: text/tab-separated-values, 414 data points
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  • 7
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    Bacteria at time series station Helgoland Roads, North Sea, in 1987 (2010)
    PANGAEA
    In:  Alfred Wegener Institute - Biological Institute Helgoland
    Details
    Publication Date: 2024-02-23
    Keywords: Acridine Orange Direct Counting (AODC); Bacteria; Bacteria, freshwater, cultivable; Bacteria, marine, cultivable; Bacteria, oil degrading; BAH; Biological oxygen demand; DATE/TIME; DEPTH, water; German Bight, North Sea; HelgolandRoads1987; Kabeltonne; Kabeltonne, Long-term Ecological Research Helgoland Roads; LTER_Benthos; LTER_HelgolandRoads; Macrobenthic long-term series in the German Bight; Meeresstation Helgoland; Mercury thermometer, in situ; MON; Monitoring; Most probable number method (MPN), based on serial dilutions; Oxygen; Oxygen, Winkler (Culberson, 1991, WOCE Report 68/91); Plate counts; Salinity; Salinometer, inductive; Shelf Seas Systems Ecology @ AWI (former Biologische Anstalt Helgoland); Surface tension; Temperature, water; Yeasts
    Type: Dataset
    Format: text/tab-separated-values, 776 data points
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  • 8
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    Bacteria at time series station Helgoland Roads, North Sea, in 1989 (2010)
    PANGAEA
    In:  Alfred Wegener Institute - Biological Institute Helgoland
    Details
    Publication Date: 2024-02-23
    Keywords: Acridine Orange Direct Counting (AODC); Bacteria; Bacteria, freshwater, cultivable; Bacteria, marine, cultivable; Bacteria, oil degrading; BAH; Biological oxygen demand; DATE/TIME; DEPTH, water; German Bight, North Sea; HelgolandRoads1989; Kabeltonne; Kabeltonne, Long-term Ecological Research Helgoland Roads; LTER_Benthos; LTER_HelgolandRoads; Macrobenthic long-term series in the German Bight; Meeresstation Helgoland; Mercury thermometer, in situ; MON; Monitoring; Most probable number method (MPN), based on serial dilutions; Oxygen; Oxygen, Winkler (Culberson, 1991, WOCE Report 68/91); Plate counts; Salinity; Salinometer, inductive; Shelf Seas Systems Ecology @ AWI (former Biologische Anstalt Helgoland); Surface tension; Temperature, water; Yeasts
    Type: Dataset
    Format: text/tab-separated-values, 731 data points
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  • 9
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    Bacteria at time series station Helgoland Roads, North Sea, in 1988 (2010)
    PANGAEA
    In:  Alfred Wegener Institute - Biological Institute Helgoland
    Details
    Publication Date: 2024-02-23
    Keywords: Acridine Orange Direct Counting (AODC); Bacteria; Bacteria, freshwater, cultivable; Bacteria, marine, cultivable; Bacteria, oil degrading; BAH; Biological oxygen demand; DATE/TIME; DEPTH, water; German Bight, North Sea; HelgolandRoads1988; Kabeltonne; Kabeltonne, Long-term Ecological Research Helgoland Roads; LTER_Benthos; LTER_HelgolandRoads; Macrobenthic long-term series in the German Bight; Meeresstation Helgoland; Mercury thermometer, in situ; MON; Monitoring; Most probable number method (MPN), based on serial dilutions; Oxygen; Oxygen, Winkler (Culberson, 1991, WOCE Report 68/91); Plate counts; Salinity; Salinometer, inductive; Shelf Seas Systems Ecology @ AWI (former Biologische Anstalt Helgoland); Surface tension; Temperature, water; Yeasts
    Type: Dataset
    Format: text/tab-separated-values, 739 data points
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  • 10
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    Bacteria at time series station Helgoland Roads, North Sea, in 1990 (2010)
    PANGAEA
    In:  Alfred Wegener Institute - Biological Institute Helgoland
    Details
    Publication Date: 2024-02-23
    Keywords: Acridine Orange Direct Counting (AODC); Adenosine 5-Triphosphate; Bacteria; Bacteria, freshwater, cultivable; Bacteria, marine, cultivable; Bacteria, oil degrading; BAH; Biological oxygen demand; DATE/TIME; DEPTH, water; Flagellates; German Bight, North Sea; HelgolandRoads1990; Kabeltonne; Kabeltonne, Long-term Ecological Research Helgoland Roads; LTER_Benthos; LTER_HelgolandRoads; LUMAC Biocounter M2500; Macrobenthic long-term series in the German Bight; Meeresstation Helgoland; Mercury thermometer, in situ; MON; Monitoring; Most probable number method (MPN), based on serial dilutions; Oxygen; Oxygen, Winkler (Culberson, 1991, WOCE Report 68/91); Plate counts; Salinity; Salinometer, inductive; Shelf Seas Systems Ecology @ AWI (former Biologische Anstalt Helgoland); Surface tension; Temperature, water; Yeasts
    Type: Dataset
    Format: text/tab-separated-values, 893 data points
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