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  • Aphanizomenon flos-aquae, biomass as carbon; Aphanizophyll; BIOACID; Biological Impacts of Ocean Acidification; Chaetoceros sp., biomass as carbon; DATE/TIME; Day of experiment; KOSMOS_2012_Tvaerminne; MESO; Mesocosm experiment; Mesocosm label; Nitrogen fixation rate; Phase; Skeletonema marinoi; δ15N  (1)
  • BIOACID; Biological Impacts of Ocean Acidification; KOSMOS_2012_Tvaerminne; MESO; Mesocosm experiment  (1)
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  • 1
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    Unbekannt
    KOSMOS Finland 2012 mesocosm study: Relative fatty acid composition and biomass of a natural plankton community in the Baltic Sea
    PANGAEA
    In:  Supplement to: Bermúdez Monsalve, Rafael; Winder, Monika; Almén, Anna-Karin; Engström-Öst, Jonna; Riebesell, Ulf (2016): Effect of ocean acidification on the structure and fatty acid composition of a natural plankton community in the Baltic Sea. Biogeosciences, 13(24), 6625-6635, https://doi.org/10.5194/bg-13-6625-2016
    Details
    Publikationsdatum: 2023-05-12
    Beschreibung: Increasing atmospheric carbon dioxide (CO2) is changing seawater chemistry towards reduced pH, which consequently affects various properties of marine organisms. Coastal and brackish water communities are expected to be less affected by ocean acidification (OA) as these communities are typically adapted to high fluctuations in CO2 and pH. Here we investigate the response of a coastal brackish water plankton community to increasing CO2 levels as projected for the coming decades and the end of this century in terms of community and biochemical fatty acid (FA) composition. A Baltic Sea plankton community was enclosed in a set of off-shore mesocosms and subjected to a CO2 gradient ranging from natural concentrations (~347 µatm fCO2) up to values projected for the year 2100 (~1333 µatm fCO2). We show that the phytoplankton community composition was resilient to CO2 and did not diverge between the treatments. Seston FA composition was influenced by community composition, which in turn was driven by silicate and phosphate limitation in the mesocosms, and showed no difference between the CO2 treatments. These results suggest that CO2 effects are dampened in coastal communities that already experience high natural fluctuations in pCO2. Although this coastal plankton community was tolerant to high pCO2 levels, hypoxia and CO2 uptake by the sea can aggravate acidification and may lead to pH changes outside the currently experienced range for coastal organisms.
    Schlagwort(e): BIOACID; Biological Impacts of Ocean Acidification; KOSMOS_2012_Tvaerminne; MESO; Mesocosm experiment
    Materialart: Dataset
    Format: application/zip, 3 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
  • 2
    facet.materialart.
    Unbekannt
    KOSMOS Finland 2012 mesocosm study: Phytoplankton biomass and pigment concentration, Nitrogen cycle parameters (2018)
    PANGAEA
    In:  Supplement to: Paul, Allanah Joy; Achterberg, Eric Pieter; Bach, Lennart Thomas; Boxhammer, Tim; Czerny, Jan; Haunost, Mathias; Schulz, Kai Georg; Stuhr, Annegret; Riebesell, Ulf (2016): No observed effect of ocean acidification on nitrogen biogeochemistry in a summer Baltic Sea plankton community. Biogeosciences, 13(13), 3901-3913, https://doi.org/10.5194/bg-13-3901-2016
    Details
    Publikationsdatum: 2024-03-06
    Beschreibung: Nitrogen fixation by filamentous cyanobacteria supplies significant amounts of new nitrogen (N) to the Baltic Sea. This balances N loss processes such as denitrification and anammox, and forms an important N source supporting primary and secondary production in N-limited post-spring bloom plankton communities. Laboratory studies suggest that filamentous diazotrophic cyanobacteria growth and N2-fixation rates are sensitive to ocean acidification, with potential implications for new N supply to the Baltic Sea. In this study, our aim was to assess the effect of ocean acidification on diazotroph growth and activity as well as the contribution of diazotrophically fixed N to N supply in a natural plankton assemblage. We enclosed a natural plankton community in a summer season in the Baltic Sea near the entrance to the Gulf of Finland in six large-scale mesocosms (volume ∼ 55m3) and manipulated fCO2 over a range relevant for projected ocean acidification by the end of this century (average treatment fCO2: 365–1231µatm).
    Schlagwort(e): Aphanizomenon flos-aquae, biomass as carbon; Aphanizophyll; BIOACID; Biological Impacts of Ocean Acidification; Chaetoceros sp., biomass as carbon; DATE/TIME; Day of experiment; KOSMOS_2012_Tvaerminne; MESO; Mesocosm experiment; Mesocosm label; Nitrogen fixation rate; Phase; Skeletonema marinoi; δ15N
    Materialart: Dataset
    Format: text/tab-separated-values, 1870 data points
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATA PANGAEA
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