Cristin-resultat-ID: 2084583
Sist endret: 15. juni 2023, 14:31
NVI-rapporteringsår: 2022
Resultat
Vitenskapelig artikkel
2022

Changes in phytoplankton community structure over a century in relation to environmental factors

Bidragsytere:
  • Elisabeth Lundsør
  • Wenche Eikrem
  • Leif Christian Stige
  • Anette Engesmo
  • Sandra Gran-Stadniczeñko og
  • Bente Edvardsen

Tidsskrift

Journal of Plankton Research
ISSN 0142-7873
e-ISSN 1464-3774
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Volum: 44
Hefte: 6
Sider: 854 - 871
Open Access

Importkilder

Scopus-ID: 2-s2.0-85150440441

Beskrivelse Beskrivelse

Tittel

Changes in phytoplankton community structure over a century in relation to environmental factors

Sammendrag

Changes in phytoplankton abundance and biomass during the period 1933–2020 were examined by statistical modeling using data from the Inner Oslofjorden phytoplankton database. The phytoplankton abundances increased with eutrophication from 1930s to 1970s, but with the implementation of sewage cleaning measures and a resulting reduction in nutrient releases, the phytoplankton abundance has since then decreased significantly. The onset of the seasonal blooms has started progressively later during the last 15 years, especially the spring bloom. The delayed spring bloom co-occurred with increasing temperature in winter and spring. The diatom biomass decreased more than that of dinoflagellates and other microeukaryotes. The diatom genus Skeletonema dominated the spring bloom and was found to be the key taxa in explaining these changes in abundance and phenology. Extensive summer blooms of the coccolithophore Emiliania huxleyi, which has been characteristic for the inner Oslofjorden, has also gradually decreased during the last decades, along with reducing eutrophication. Dinoflagellates have not had the same reduction in abundance as the other groups. Despite an increasing proportion of dinoflagellates compared with other taxa, there are no clear indications of increased occurrence of toxic algal blooms in inner Oslofjorden. However, the introduction of new “toxin-producing” species may cause concern.

Bidragsytere

Elisabeth Lundsør

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Norconsult AS

Wenche Eikrem

  • Tilknyttet:
    Forfatter
    ved Naturhistorisk museum ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Marin biogeokjemi og oseanografi ved Norsk institutt for vannforskning
Aktiv cristin-person

Leif Christian Stige

  • Tilknyttet:
    Forfatter
    ved Centre for Ecological and Evolutionary Synthesis ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Veterinærinstituttet

Anette Engesmo

  • Tilknyttet:
    Forfatter
    ved Marin biogeokjemi og oseanografi ved Norsk institutt for vannforskning

Sandra Stadniczeñko Gran

Bidragsyterens navn vises på dette resultatet som Sandra Gran-Stadniczeñko
  • Tilknyttet:
    Forfatter
    ved Marin biogeokjemi og oseanografi ved Norsk institutt for vannforskning
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