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  • 1
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    Swimming speed of two phytoplankton species, Rhodomonas salina and Teleaulax sp., and the heterotrophic dinoflagellate Oxyrrhis marina (2020)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-03-16
    Description: Swimming speed of two phytoplankton species, Rhodomonas salina and Teleaulax sp., grown in nutrient replete F/2 medium and in P-limited conditions, as well as swimming speed of the heterotrophic dinoflagellate Oxyrrhis marina either starved or fed with these four types of phytoplankton individually. In addition to the different culture and feeding conditions, the phytoplankton and dinoflagellates were incubated with the water from differently cultured organisms.
    Keywords: Method comment; Species; Speed, swimming; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 11288 data points
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    DATA PANGAEA
  • 2
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    (Supplement 3) Selective feeding of dinoflagellate in the FlowCam experiment (2021)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: This dataset comprises data from two experiments analysed with two different tools, a FlowCam and a microscope. The heterotrophic dinoflagellate Oxyrrhis marina was subjected to different feeding treatments (starved, or fed with either F/2 nutrient reach, nitrogen-limited, or phosphorus-limited phytoplankton of the species Rhodomonas salina). The carbon:nitrogen:phosphorus stoichiometry of the different phytoplankton and dinoflagellate cultures was measured. The nitrogen-limited and phosphorus-limited phytoplankton were mixed and the mixture was offered as food to the dinoflagellates previously fed on either nitrogen-limited, or phosphorus-limited phytoplankton. The selective feeding of the dinoflagellate on the two mixed algal qualities was measured.
    Keywords: FlowCam; Nitrogen; Phosphorus; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 90 data points
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    DATA PANGAEA
  • 3
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    (Supplement 4) Selective feeding of dinoflagellate in the Microscopy experiment (2021)
    PANGAEA
    Details
    Publication Date: 2023-01-24
    Description: This dataset comprises data from two experiments analysed with two different tools, a FlowCam and a microscope. The heterotrophic dinoflagellate Oxyrrhis marina was subjected to different feeding treatments (starved, or fed with either F/2 nutrient reach, nitrogen-limited, or phosphorus-limited phytoplankton of the species Rhodomonas salina). The carbon:nitrogen:phosphorus stoichiometry of the different phytoplankton and dinoflagellate cultures was measured. The nitrogen-limited and phosphorus-limited phytoplankton were mixed and the mixture was offered as food to the dinoflagellates previously fed on either nitrogen-limited, or phosphorus-limited phytoplankton. The selective feeding of the dinoflagellate on the two mixed algal qualities was measured.
    Keywords: Cell density; Microscopy; Replicate; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
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    DATA PANGAEA
  • 4
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    Response of A. aurita ephyrae to three stressors: high-temperature, high-CO2 and low-oxygen (2016)
    PANGAEA
    In:  Alfred Wegener Institute - Biological Institute Helgoland | Supplement to: Algueró-Muñiz, Maria; Meunier, Cédric Léo; Holst, Sabine; Alvarez-Fernandez, Santiago; Boersma, Maarten (2016): Withstanding multiple stressors: ephyrae of the moon jellyfish (Aurelia aurita, Scyphozoa) in a high-temperature, high-CO2 and low-oxygen environment. Marine Biology, 163(9), https://doi.org/10.1007/s00227-016-2958-z
    Details
    Publication Date: 2023-02-24
    Description: Global change is affecting marine ecosystems through a combination of different stressors such as warming, ocean acidification and oxygen depletion. Very little is known about the interactions among these factors, especially with respect to gelatinous zooplankton. Therefore, in this study we investigated the direct effects of pH, temperature and oxygen availability on the moon jellyfish Aurelia aurita, concentrating on the ephyral life stage. Starved one-day-old ephyrae were exposed to a range of pCO2 (400-4000 ppm) and three different dissolved oxygen levels (from saturated to hypoxic conditions), in two different temperatures (5 and 15 °C) for 7 days. Carbon content and swimming activity were analysed at the end of the incubation period, and mortality noted. General linearized models were fitted through the data, with the best fitting models including two- and three-way interactions between pCO2, temperature and oxygen concentration. The combined effect of the stressors was small but significant, with the clearest negative effect on growth caused by the combination of all three stressors present (high temperature, high CO2, low oxygen). We conclude that A. aurita ephyrae are robust and that they are not likely to suffer from these environmental stressors in a near future.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 5
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    (Supplement 1) Phytoplankton and dinoflagellate stoichiometry in the FlowCam experiment (2020)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-06-19
    Description: This dataset comprises data from two experiments analysed with two different tools, a FlowCam and a microscope. The heterotrophic dinoflagellate Oxyrrhis marina was subjected to different feeding treatments (starved, or fed with either F/2 nutrient reach, nitrogen-limited, or phosphorus-limited phytoplankton of the species Rhodomonas salina). The carbon:nitrogen:phosphorus stoichiometry of the different phytoplankton and dinoflagellate cultures was measured. The nitrogen-limited and phosphorus-limited phytoplankton were mixed and the mixture was offered as food to the dinoflagellates previously fed on either nitrogen-limited, or phosphorus-limited phytoplankton. The selective feeding of the dinoflagellate on the two mixed algal qualities was measured.
    Keywords: Carbon/Nitrogen ratio; Carbon/Phosphorus ratio; Carbon per cell; FlowCam; Nitrogen/Phosphorus ratio; Nitrogen per cell; Phosphorus per cell; Replicate; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 440 data points
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    DATA PANGAEA
  • 6
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    Carbon and nitrogen content of the diet of Temora longicornis under different nutrient regimes (2018)
    PANGAEA
    Details
    Publication Date: 2023-06-19
    Keywords: AWI_BioOce; Biological Oceanography @ AWI; Biomass as carbon per volume; Biomass as nitrogen per volume; Carbon, organic, particulate mass; Carbon/Nitrogen ratio; Carbon per cell; Cells, total; Experimental treatment; Nitrogen, organic, particulate mass; Nitrogen per cell; Number of cells; Replicate; Sampling date
    Type: Dataset
    Format: text/tab-separated-values, 168 data points
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    DATA PANGAEA
  • 7
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    Carbon and nitrogen contents for the diatom Conticribra weissflogii (2019)
    PANGAEA
    Details
    Publication Date: 2023-06-19
    Description: The larvae of the reef-building polychaete Lanice conchilega can make up to 15% of the summer zooplankton biomass in the North Sea. Despite their importance for reef maintenance (which positively affects the benthic community), little is known about the trophic ecology of this meroplanktonic larva. Qualitative and quantitative estimates of carbon (C) transfer between trophic levels and of fatty acid (FA)-specific assimilation, biosynthesis, and bioconversion can be obtained by compound-specific stable isotope analysis of FA. The present work tested the hypothesis that the concept of fatty acid trophic markers (FATM), widely used for studies on holoplankton with intermediate to high lipid contents, is also applicable to lipid-poor organisms such as meroplanktonic larvae. The incorporation of isotopically-enriched dietary C by L. conchilega larvae was traced, and lipid assimilation did not follow FA-specific relative availabilities in the diet. Furthermore, FAs that were unavailable in the diet, such as 22:5(n-3), were recorded in L. conchilega, suggesting their bioconversion by the larvae. The results indicate that L. conchilega larvae preferentially assimilate certain FAs and regulate their FA composition (lipid homeostasis) independently of that of their diet. Their quasi-homeostatic response to dietary FA availability could imply that the concept of FATM has limited application in lipid-poor organisms such as L. conchilega larvae.
    Keywords: assimilation; bioconversion; Carbon, organic, total per volume; Carbon/Nitrogen ratio; Cell; compound-specific stable isotope analysis; DATE/TIME; Diatoms, biomass as carbon; Diatoms, biomass as nitrogen; Diatoms, carbon per cell; Diatoms, nitrogen per cell; fatty acid trophic markers; lipid-poor species; meroplanktonic larvae; Nitrogen; Number of cells; polychaete; Replicate; Species
    Type: Dataset
    Format: text/tab-separated-values, 60 data points
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    DATA PANGAEA
  • 8
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    Fatty acid contents for the diatom Conticribra weissflogii (2019)
    PANGAEA
    Details
    Publication Date: 2023-06-19
    Description: The larvae of the reef-building polychaete Lanice conchilega can make up to 15% of the summer zooplankton biomass in the North Sea. Despite their importance for reef maintenance (which positively affects the benthic community), little is known about the trophic ecology of this meroplanktonic larva. Qualitative and quantitative estimates of carbon (C) transfer between trophic levels and of fatty acid (FA)-specific assimilation, biosynthesis, and bioconversion can be obtained by compound-specific stable isotope analysis of FA. The present work tested the hypothesis that the concept of fatty acid trophic markers (FATM), widely used for studies on holoplankton with intermediate to high lipid contents, is also applicable to lipid-poor organisms such as meroplanktonic larvae. The incorporation of isotopically-enriched dietary C by L. conchilega larvae was traced, and lipid assimilation did not follow FA-specific relative availabilities in the diet. Furthermore, FAs that were unavailable in the diet, such as 22:5(n-3), were recorded in L. conchilega, suggesting their bioconversion by the larvae. The results indicate that L. conchilega larvae preferentially assimilate certain FAs and regulate their FA composition (lipid homeostasis) independently of that of their diet. Their quasi-homeostatic response to dietary FA availability could imply that the concept of FATM has limited application in lipid-poor organisms such as L. conchilega larvae.
    Keywords: assimilation; Atomic weight; Atom percent; bioconversion; Carbon, number of atoms; compound-specific stable isotope analysis; Fatty acid, common name; Fatty acid, IUPAC nomenclature; Fatty acid, n-x nomenclature; Fatty acid as carbon; Fatty acid as carbon per cell; Fatty acid as percentage of total fatty acids; Fatty acid content; Fatty acid per cell; Fatty acids, total; Fatty acids, δ13C; fatty acid trophic markers; Hydrogen, number of atoms; lipid-poor species; meroplanktonic larvae; Number of insaturations; Oxygen, number of atoms; polychaete; Replicate; Species
    Type: Dataset
    Format: text/tab-separated-values, 1669 data points
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    DATA PANGAEA
  • 9
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    Carbon and nitrogen contents of the diet of Temora longicornis under different nutrient regimes (2018)
    PANGAEA
    Details
    Publication Date: 2023-06-19
    Keywords: AWI_BioOce; Biological Oceanography @ AWI; Biomass as carbon per volume; Biomass as nitrogen per volume; Carbon, organic, particulate mass; Carbon/Nitrogen ratio; Carbon per cell; Cells, total; Experimental treatment; Nitrogen, organic, particulate mass; Nitrogen per cell; Number of cells; Replicate; Sampling date
    Type: Dataset
    Format: text/tab-separated-values, 168 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 10
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    (Supplement 2) Phytoplankton and dinoflagellate stoichiometry in the Microscopy experiment (2020)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-06-19
    Description: This dataset comprises data from two experiments analysed with two different tools, a FlowCam and a microscope. The heterotrophic dinoflagellate Oxyrrhis marina was subjected to different feeding treatments (starved, or fed with either F/2 nutrient reach, nitrogen-limited, or phosphorus-limited phytoplankton of the species Rhodomonas salina). The carbon:nitrogen:phosphorus stoichiometry of the different phytoplankton and dinoflagellate cultures was measured. The nitrogen-limited and phosphorus-limited phytoplankton were mixed and the mixture was offered as food to the dinoflagellates previously fed on either nitrogen-limited, or phosphorus-limited phytoplankton. The selective feeding of the dinoflagellate on the two mixed algal qualities was measured.
    Keywords: Carbon/Nitrogen ratio; Carbon/Phosphorus ratio; Carbon per cell; Microscopy; Nitrogen/Phosphorus ratio; Nitrogen per cell; Phosphorus per cell; Replicate; Species; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 126 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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