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  • Alkalinity, total; Aragonite saturation state; Baltic Sea; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Community composition and diversity; DATE/TIME; Day of experiment; Dolichospermum spp., biomass; Entire community; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Mesocosm label; Mesocosm or benthocosm; Nodularia spp., biomass; Nostoc sp., biomass as carbon; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phase; Phosphate; Phosphate, organic, dissolved; Phytoplankton, biomass; Ratio; Salinity; Sample code/label; Silicate; Temperate; Temperature; Temperature, water; Treatment: temperature; Type; δ15N  (1)
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    Electronic Resource
    Electronic Resource
    The species composition of Antarctic phytoplankton interpreted in terms of Tilman's competition theory (1988)
    Springer
    Oecologia 77 (1988), S. 464-467 
    Details
    ISSN: 1432-1939
    Keywords: Antarctic phytoplankton ; Competition ; Resource ratios ; Nutrients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An attempt was made, to test for the impact of resource competition on Antarctic marine phytoplankton. According to theory, species composition near competitive equilibrium should be determined by the ratios of limiting resources. Enrichment bioassays identified silicon and nitrogen as limiting nutrients for some of the most important phytoplankton species during early austral summer in the region near the Antarctic Peninsula. Together with the generally acknowledged limiting resource light, this gave three meaningful ratios of essential resources (Si:N, Si:light, N:light) and one ratio of substitutable resources (NO3:NH4). Phytoplankton species assemblages were found to be well separated by the ratios of the essential resources and by mixing depth. Nine out of 12 individual species were found to be separated along at least one of the gradients of resource ratios. Where comparison with competition experiments was available, predicted and realized distributions of species were compatible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377261
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    Paper (German National Licenses)
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    Seawater carbonate chemistry and phytoplankton biomass during the BIOACID II indoor mesocosm study in the Kiel Fjord (Baltic Sea) (2018)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: Nitrogen fixation is a key source of nitrogen in the Baltic Sea which counteracts nitrogen loss processes in the deep anoxic basins. Laboratory and field studies have indicated that single-strain nitrogen-fixing (diazotrophic) cyanobacteria from the Baltic Sea are sensitive to ocean acidification and warming, 2 drivers of marked future change in the marine environment. Here, we enclosed a natural plankton community in 12 indoor mesocosms (volume 1400 l) and manipulated partial pressure of carbon dioxide ( pCO2) in seawater to yield 6 CO2 treatments with 2 different temperature treatments (16.6°C and 22.4°C, pCO2 range = 360-2030 µatm). We followed the filamentous, heterocystous diazotrophic cyanobacteria community (Nostocales, primarily Nodularia spumigena) over 4 wk. Our results indicate that heterocystous diazotrophic cyanobacteria may become less competitive in natural plankton communities under ocean acidification. Elevated CO2 had a negative impact on Nodularia sp. biomass, which was exacerbated by warming. Our results imply that Nodularia sp. may contribute less to new nitrogen inputs in the Baltic Sea in the future.
    Keywords: Alkalinity, total; Aragonite saturation state; Baltic Sea; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Community composition and diversity; DATE/TIME; Day of experiment; Dolichospermum spp., biomass; Entire community; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Mesocosm label; Mesocosm or benthocosm; Nodularia spp., biomass; Nostoc sp., biomass as carbon; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phase; Phosphate; Phosphate, organic, dissolved; Phytoplankton, biomass; Ratio; Salinity; Sample code/label; Silicate; Temperate; Temperature; Temperature, water; Treatment: temperature; Type; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 6046 data points
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    DATA PANGAEA
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