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  • Data  (13)
  • 2020-2024  (13)
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  • 1
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    Mesocosm experiment 2013 on effects of increased CO2 concentration on nutrient limited coastal summer plankton: Microzooplankton biovolume (2021)
    PANGAEA
    Details
    Publication Date: 2023-02-24
    Description: Aquatic ecosystems face a multitude of environmental stressors, including warming and acidification. While warming is expected to have a pronounced effect on plankton communities, many components of the plankton seem fairly robust towards realistic end-of-century acidification conditions. However, interactions of the two stressors and the inclusion of further factors such as nutrient concentration and trophic interactions are expected to change this outcome. We investigated the effects of warming and high CO2 on a nutrient-deplete late summer plankton community from the Kiel Fjord, Baltic Sea, using a mesocosm setup crossing two temperatures with a gradient of CO2. Phytoplankton and microzooplankton (MZP) growth rates as well as biomass, taxonomic composition, and grazing rates of MZP were analysed. We observed effects of high CO2, warming, and their interactions on all measured parameters. The occurrence and direction of the effects were dependent on the phytoplankton or MZP community composition. In addition, the abundance of small-sized phytoplankton was identified as one of the most important factors in shaping the MZP community composition. Overall, our results indicate that an estuarine MZP community used to strong natural fluctuations in CO2 can still be affected by a moderate increase in CO2 if it occurs in combination with warming and during a nutrient-deplete post-bloom situation. This highlights the importance of including trophic interactions and seasonality aspects when assessing climate change effects on marine zooplankton communities.
    Keywords: Baltic Sea; BIOACID; Biological Impacts of Ocean Acidification; Cell, diameter; Cell, length; Cell biovolume; ciliates; Dinoflagellates; global warming; mesocosm; Ocean acidification; Taxon/taxa
    Type: Dataset
    Format: text/tab-separated-values, 1414 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Mesocosm experiment on effects of increased CO2 concentration on nutrient limited coastal summer plankton: Microzooplankton abundance (2021)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Description: Aquatic ecosystems face a multitude of environmental stressors, including warming and acidification. While warming is expected to have a pronounced effect on plankton communities, many components of the plankton seem fairly robust towards realistic end-of-century acidification conditions. However, interactions of the two stressors and the inclusion of further factors such as nutrient concentration and trophic interactions are expected to change this outcome. We investigated the effects of warming and high CO2 on a nutrient-deplete late summer plankton community from the Kiel Fjord, Baltic Sea, using a mesocosm setup crossing two temperatures with a gradient of CO2. Phytoplankton and microzooplankton (MZP) growth rates as well as biomass, taxonomic composition, and grazing rates of MZP were analysed. We observed effects of high CO2, warming, and their interactions on all measured parameters. The occurrence and direction of the effects were dependent on the phytoplankton or MZP community composition. In addition, the abundance of small-sized phytoplankton was identified as one of the most important factors in shaping the MZP community composition. Overall, our results indicate that an estuarine MZP community used to strong natural fluctuations in CO2 can still be affected by a moderate increase in CO2 if it occurs in combination with warming and during a nutrient-deplete post-bloom situation. This highlights the importance of including trophic interactions and seasonality aspects when assessing climate change effects on marine zooplankton communities.
    Keywords: Balanion comatum; Baltic Sea; BIOACID; Biological Impacts of Ocean Acidification; ciliates; Ciliates, loricate; Ciliates, other; DATE/TIME; Day of experiment; Dinoflagellates; Dinoflagellates, athecate; Dinoflagellates, thecate; Dinophysis sp.; Euplotes sp.; global warming; Lohmaniella oviformis; mesocosm; Mesocosm label; Myrionecta rubra; Ocean acidification; Prorocentrum micans; Prorocentrum minimum; Strobilidium sp.; Strobilidium spp.; Strombidium sp.; Strombidium spp.; Suctoria; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 1656 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Plankton and dissolved nutrient data from 2016 mesocosm experiment manipulating Si:N and copepod grazing on Baltic Sea plankton community (2020)
    PANGAEA
    Details
    Publication Date: 2023-08-30
    Description: Phytoplankton, microzooplankton, copepod and dissolved nutrient data from a mesocosm experiment, which took place in summer 2016. A range of Si:N ratios and two levels of copepod grazing pressure were manipulated on a natural plankton community in Kiel Bay, Southern Baltic Sea, Germany.
    Keywords: mesocosm; nutrient ratios; Phytoplankton; silicon; stoichiometry; Zooplankton
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Plankton data from 2016 mesocosm experiment manipulating Si:N and copepod grazing on Baltic Sea plankton community (2020)
    PANGAEA
    Details
    Publication Date: 2023-08-30
    Description: Phytoplankton, microzooplankton, copepod and dissolved nutrient data from a mesocosm experiment, which took place in summer 2016. A range of Si:N ratios and two levels of copepod grazing pressure were manipulated on a natural plankton community in Kiel Bay, Southern Baltic Sea, Germany.
    Keywords: Biomass as carbon per volume; Carbon per cell; DATE/TIME; Experiment day; Functional group; Kiel_Bight_2016; Kieler Bucht; MESO; Mesocosm experiment; Mesocosm label; Plankton; Plankton, biovolume; Species; Treatment; Type; Volume
    Type: Dataset
    Format: text/tab-separated-values, 54060 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Copepod data from 2016 mesocosm experiment manipulating Si:N and copepod grazing on Baltic Sea plankton community (2020)
    PANGAEA
    Details
    Publication Date: 2023-08-30
    Description: Phytoplankton, microzooplankton, copepod and dissolved nutrient data from a mesocosm experiment, which took place in summer 2016. A range of Si:N ratios and two levels of copepod grazing pressure were manipulated on a natural plankton community in Kiel Bay, Southern Baltic Sea, Germany.
    Keywords: Acartia sp., nauplii; Copepoda; Copepoda, adult; Copepodites; DATE/TIME; Eggs; Eurytemora sp., nauplii; Experiment day; Kiel_Bight_2016; Kieler Bucht; MESO; Mesocosm experiment; Mesocosm label; Nauplii; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 220 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Bacteria data from 2016 mesocosm experiment manipulating Si:N and copepod grazing on Baltic Sea plankton community (2020)
    PANGAEA
    Details
    Publication Date: 2023-08-30
    Description: Phytoplankton, microzooplankton, copepod and dissolved nutrient data from a mesocosm experiment, which took place in summer 2016. A range of Si:N ratios and two levels of copepod grazing pressure were manipulated on a natural plankton community in Kiel Bay, Southern Baltic Sea, Germany.
    Keywords: Bacteria; DATE/TIME; Experiment day; Kiel_Bight_2016; Kieler Bucht; MESO; Mesocosm experiment; Mesocosm label; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 900 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Dissolved nutrient data from 2016 mesocosm experiment manipulating Si:N and copepod grazing on Baltic Sea plankton community (2020)
    PANGAEA
    Details
    Publication Date: 2023-08-30
    Description: Phytoplankton, microzooplankton, copepod and dissolved nutrient data from a mesocosm experiment, which took place in summer 2016. A range of Si:N ratios and two levels of copepod grazing pressure were manipulated on a natural plankton community in Kiel Bay, Southern Baltic Sea, Germany.
    Keywords: Ammonium; DATE/TIME; Experiment day; Kiel_Bight_2016; Kieler Bucht; MESO; Mesocosm experiment; Mesocosm label; Nitrate; Nitrate and Nitrite; Nitrite; Nitrogen, total; Phosphate; Silicate; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 1980 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Composition and dominance of edible and inedible phyto-plankton predict responses of Baltic Sea summer communities to elevated temperature and CO2 (2021)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: Previous studies with Baltic Sea phytoplankton combining elevated seawater temperature with CO2 revealed the importance of size trait-based analyses, in particular dividing the plankton in-to edible (〉 5 and 〈 100 µm) and inedible (〈 5 and 〉 100 µm) size classes for mesozoopankton grazers. While the edible phytoplankton responded predominantly negative to warming and the inedible group stayed unaffected or increased, independent from edibility most phyto-plankton groups gained from CO2. Because the ratio between edible and inedible taxa changes profoundly over seasons, we investigated, if community responses can be predicted according to the prevailing composition of edible and inedible groups. We experimentally explored the combined effects of elevated temperatures and CO2 concentrations on a late-summer Baltic Sea community. Total phytoplankton significantly increased in response to elevated CO2 in particu-lar in combination with temperature, driven by a significant gain of the inedible 〈 5 µm fraction and large filamentous cyanobacteria. Large flagellates disappeared. The edible group was low as usual in summer and decreased with both factors due to enhanced copepod grazing and overall decline of small flagellates. Our results emphasize that the responses of summer communities are complex, but can be predicted by the composition and dominance of size classes and groups.
    Keywords: Baltic Sea; BIOACID; Biological Impacts of Ocean Acidification; Climate change; CO2; grazing; Phytoplankton; warming
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Phytoplankton carbon related biomass of each species/ taxa or group of indoor mesocosm experiment 2014 (2021)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: Previous studies with Baltic Sea phytoplankton combining elevated seawater temperature with CO2 revealed the importance of size trait-based analyses, in particular dividing the plankton in-to edible (〉 5 and 〈 100 µm) and inedible (〈 5 and 〉 100 µm) size classes for mesozoopankton grazers. While the edible phytoplankton responded predominantly negative to warming and the inedible group stayed unaffected or increased, independent from edibility most phyto-plankton groups gained from CO2. Because the ratio between edible and inedible taxa changes profoundly over seasons, we investigated, if community responses can be predicted according to the prevailing composition of edible and inedible groups. We experimentally explored the combined effects of elevated temperatures and CO2 concentrations on a late-summer Baltic Sea community. Total phytoplankton significantly increased in response to elevated CO2 in particu-lar in combination with temperature, driven by a significant gain of the inedible 〈 5 µm fraction and large filamentous cyanobacteria. Large flagellates disappeared. The edible group was low as usual in summer and decreased with both factors due to enhanced copepod grazing and overall decline of small flagellates. Our results emphasize that the responses of summer communities are complex, but can be predicted by the composition and dominance of size classes and groups.
    Keywords: Baltic Sea; BIOACID; Biological Impacts of Ocean Acidification; Climate change; CO2; DATE/TIME; Day of experiment; grazing; Kiel_Bight_2014; MESO; Mesocosm experiment; Mesocosm label; Phytoplankton; Phytoplankton, biomass as carbon; warming
    Type: Dataset
    Format: text/tab-separated-values, 2304 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Stable isotope analysis of marine plankton during Maria S. Merian cruise MSM49 (2020)
    PANGAEA
    Details
    Publication Date: 2024-03-08
    Description: Data represent isotopic values of plankton community of the eastern tropical Atlantic. Main focus was given to the trophic position of gelatinous zooplankton within the oceanic food web. Sampling was conducted during November and December 2015 on board R/V “MARIA S. MERIAN” (cruise MSM49) at 8 stations in Cape Verdean waters in the ETA, including a shallow seamount (Senghor Seamount, 100-3300 m) and its northwestern and southeastern slopes, a cyclonic eddy, and four oceanic stations. Net sampling was conducted using two types of multiple opening/closing nets and environmental sampling systems (MOCNESS), one with 1 m2 ( three nets, mesh size: 2 mm; and six nets, mesh size: 335 µm) and one with 10 m2 opening (five nets, mesh size: 1.5 mm), towed at a speed of 2 kn. Sampling depth intervals were targeted at 0-50, 50-100, 100-200, 200-400, 400-600, and 600-1000 m. Samples from replicate tows at the same depth and station were pooled for analyses.
    Keywords: Carbon/Nitrogen ratio; DEPTH, water; Depth comment; Event label; Group; Maria S. Merian; MSM49; MSM49_585; MSM49_587; MSM49_588; MSM49_595; MSM49_601; MSM49_602; MSM49_603; MSM49_604; MULT; Multiple investigations; S03_Senghor Ref; S04_Senghor NW; S05_Senghor Summit; S06_Senghor SE; S07_Eddy; S08_CVSE; S09_CVS1; S10_CVS2; Size; Species; Station label; Taxa; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 7193 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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