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  • Nature Research  (2)
  • PANGAEA  (2)
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  • 1
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    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
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    DATA PANGAEA
  • 2
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    Effect of ocean acidification on the structure and fatty acid composition of a natural plankton community in the Baltic Sea (2016)
    PANGAEA
    Details
    Publikationsdatum: 2024-03-15
    Schlagwort(e): Acartia bifilosa; Alkalinity, total; Aragonite saturation state; Baltic Sea; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calcite saturation state; Calculated; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Day of experiment; Entire community; Eurytemora affinis; Fatty acids; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Group; Hand-operated CTD (Sea&Sun Technology, CTD 60M); KOSMOS_2012_Tvaerminne; Laboratory experiment; MESO; Mesocosm experiment; Mesocosm label; Mesocosm or benthocosm; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phosphorus, inorganic, dissolved; Phytoplankton, biomass as carbon; Registration number of species; Salinity; Silicate; Species; Spectrophotometric; Temperate; Temperature, water; Type; Uniform resource locator/link to reference
    Materialart: Dataset
    Format: text/tab-separated-values, 19566 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 3
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    Ocean acidification reduces transfer of essential biomolecules in a natural plankton community (2016)
    Nature Research
    In:  Scientific Reports, 6 . p. 27749.
    Details
    Publikationsdatum: 2019-02-01
    Beschreibung: Ocean acidification (OA), a process of increasing seawater acidity caused by the uptake of anthropogenic carbon dioxide (CO 2) by the ocean, is expected to change surface ocean pH to levels unprecedented for millions of years, affecting marine food web structures and trophic interactions. Using an in situ mesocosm approach we investigated effects of OA on community composition and trophic transfer of essential fatty acids (FA) in a natural plankton assemblage. Elevated pCO 2 favored the smallest phytoplankton size class in terms of biomass, primarily picoeukaryotes, at the expense of chlorophyta and haptophyta in the nano-plankton size range. This shift in community composition and size structure was accompanied by a decline in the proportion of polyunsaturated FA (PUFA) to total FA content in the nano- and picophytoplankton size fractions. This decline was mirrored in a continuing reduction in the relative PUFA content of the dominant copepod, Calanus finmarchicus, which primarily fed on the nano-size class. Our results demonstrate that a shift in phytoplankton community composition and biochemical composition in response to rising CO 2 can affect the transfer of essential compounds to higher trophic levels, which rely on their prey as a source for essential macromolecules.
    Materialart: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.1038/srep27749
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 4
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    Niche partitioning between planktivorous fish in the pelagic Baltic Sea assessed by DNA metabarcoding, qPCR and microscopy (2022)
    Nature Research
    Details
    Publikationsdatum: 2024-02-07
    Beschreibung: Marine communities undergo rapid changes related to human-induced ecosystem pressures. The Baltic Sea pelagic food web has experienced several regime shifts during the past century, resulting in a system where competition between the dominant planktivorous mesopredatory clupeid fish species herring (Clupea harengus) and sprat (Sprattus sprattus) and the rapidly increasing stickleback (Gasterosteus aculeatus) population is assumed to be high. Here, we investigate diet overlap between these three planktivorous fishes in the Baltic Sea, utilizing DNA metabarcoding on the 18S rRNA gene and the COI gene, targeted qPCR, and microscopy. Our results show niche differentiation between clupeids and stickleback, and highlight that rotifers play an important role in this pattern, as a resource that is not being used by the clupeids nor by other zooplankton in spring. We further show that all the diet assessment methods used in this study are consistent, but also that DNA metabarcoding describes the plankton-fish link at the highest taxonomic resolution. This study suggests that rotifers and other understudied soft-bodied prey may have an important function in the pelagic food web and that the growing population of pelagic stickleback may be supported by the open feeding niche offered by the rotifers.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
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