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  • AWI_BioOce; Biological Oceanography @ AWI  (1)
  • AWI_BioOce; Biological Oceanography @ AWI; DATE/TIME; Date/time start; Duration; Event label; Experimental treatment; German Bight, North Sea; HelgolandRoads_temora_longicornis_2016; Kabeltonne; Replicate; Sea surface temperature; Temora longicornis, female, biomass as carbon per individual; Temora longicornis, female, biomass as nitrogen per individual; Temora longicornis, female, somatic growth rate as carbon per individual; Temora longicornis, female, somatic growth rate as daily ration of body carbon; Temora longicornis, female, somatic growth rate as daily ration of body nitrogen; Temora longicornis, female, somatic growth rate as nitrogen per individual; Treatment: temperature  (1)
  • Alexandrium sp.; bottom-up; growth; Laboratory experiment; Light; Nitrogen; photophysiology; phycotoxins
Collection
Keywords
Publisher
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  • 1
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    Unknown
    Vital rate measurements and carbon and nitrogen contents of Temora longicornis under different nutrient regimes (2018)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2023-07-06
    Description: The copepod Temora longicornis depends on constant prey availability. Given that climate change may induce food regime shifts, our research goal was to understand copepod energy allocation in relation to diet quality. The working hypothesis was that Temora performs better on the diet whose elemental ratio is closest to its own. Diatoms (Diat) and dinoflagellates (Dino) cultured in nutrient-replete (+) and nitrogen-depleted (-) conditions were fed to the copepods. Ingestion, respiration, excretion, and egg and faecal pellet production rates were measured. Carbon (C) and nitrogen (N) budgets were built to investigate differences in dietary C and N partitioning. Copepods fed with nitrogen-depleted diatoms (Diat-), which had the most different C:N ratio to that of T. longicornis, had high metabolic losses and low growth. In contrast, copepods fed with nitrogen-rich dinoflagellates (Dino+) of closer C:N ratio had high metabolic losses, but the highest investment into somatic and reproductive tissue. The results indicate that, under the current climate scenario and nutrient-replete conditions, dinoflagellates are a better food source for T. longicornis. Furthermore, ingestion, respiration, and faecal pellet integrity are adversely affected by low quality food; and egestion is a main pathway in copepods for eliminating excess carbon.
    Keywords: AWI_BioOce; Biological Oceanography @ AWI
    Type: Dataset
    Format: application/zip, 9 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Somatic growth rates of Temora longicornis under different nutrient regimes (2018)
    PANGAEA
    Details
    Publication Date: 2024-01-26
    Keywords: AWI_BioOce; Biological Oceanography @ AWI; DATE/TIME; Date/time start; Duration; Event label; Experimental treatment; German Bight, North Sea; HelgolandRoads_temora_longicornis_2016; Kabeltonne; Replicate; Sea surface temperature; Temora longicornis, female, biomass as carbon per individual; Temora longicornis, female, biomass as nitrogen per individual; Temora longicornis, female, somatic growth rate as carbon per individual; Temora longicornis, female, somatic growth rate as daily ration of body carbon; Temora longicornis, female, somatic growth rate as daily ration of body nitrogen; Temora longicornis, female, somatic growth rate as nitrogen per individual; Treatment: temperature
    Type: Dataset
    Format: text/tab-separated-values, 204 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Effects of bottom-up factors (N-source and light) on growth and toxin content of the harmful dinoflagellate Alexandrium pseudogonyaulax (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-06
    Description: The effect of different nitrogen sources (Experiment 1: N-deplete, NO3-, NH4+, Urea) and different light intensities (Experiment 2: 20, 100 and 200 μmol photons m-2 s-1) on the growth response and toxin content of Alexandrium pseudogonyaulax, isolated in 2020 from the Danish Limfjord, were investigated by means of bottle incubation experiments. In the 2nd experiment, the pigment content and photophysiological response of A. pseudogonyaulax was additionally assessed. The 1st experiment was started on the 18th October 2021 and finished on the 13th December 2021, while the 2nd experiment was started on the 16th March 2022 and finished on the 14th April 2022. This dataset contains all data collected within the two experiments, including cell counts, cell sizes, goniodomin A toxin contents, particular organic carbon and nitrogen, pigment contents (only exp. 2) and photophysiological parameters (only exp. 2).
    Keywords: Alexandrium sp.; bottom-up; growth; Laboratory experiment; Light; Nitrogen; photophysiology; phycotoxins
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
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