Cristin-resultat-ID: 1822027
Sist endret: 15. januar 2021, 12:48
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

Congruence, but no cascade—Pelagic biodiversity across three trophic levels in Nordic lakes

Bidragsytere:
  • Tom Andersen
  • Dag Olav Hessen
  • Johnny Peter Håll
  • Maryia Khomich
  • Marcia Kyle
  • Markus Lindholm
  • mfl.

Tidsskrift

Ecology and Evolution
ISSN 2045-7758
e-ISSN 2045-7758
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Publisert online: 2020
Volum: 10
Hefte: 15
Sider: 8153 - 8165
Open Access

Importkilder

Scopus-ID: 2-s2.0-85088035460

Beskrivelse Beskrivelse

Tittel

Congruence, but no cascade—Pelagic biodiversity across three trophic levels in Nordic lakes

Sammendrag

Covariation in species richness and community structure across taxonomical groups (cross‐taxon congruence) has practical consequences for the identification of biodiversity surrogates and proxies, as well as theoretical ramifications for understanding the mechanisms maintaining and sustaining biodiversity. We found there to exist a high cross‐taxon congruence between phytoplankton, zooplankton, and fish in 73 large Scandinavian lakes across a 750 km longitudinal transect. The fraction of the total diversity variation explained by local environment alone was small for all trophic levels while a substantial fraction could be explained by spatial gradient variables. Almost half of the explained variation could not be resolved between local and spatial factors, possibly due to confounding issues between longitude and landscape productivity. There is strong consensus that the longitudinal gradient found in the regional fish community results from postglacial dispersal limitations, while there is much less evidence for the species richness and community structure gradients at lower trophic levels being directly affected by dispersal limitation over the same time scale. We found strong support for bidirectional interactions between fish and zooplankton species richness, while corresponding interactions between phytoplankton and zooplankton richness were much weaker. Both the weakening of the linkage at lower trophic levels and the bidirectional nature of the interaction indicates that the underlying mechanism must be qualitatively different from a trophic cascade.

Bidragsytere

Tom Andersen

  • Tilknyttet:
    Forfatter
    ved Seksjon for akvatisk biologi og toksikologi ved Universitetet i Oslo
Aktiv cristin-person

Dag Olav Hessen

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

Johnny Peter Håll

  • Tilknyttet:
    Forfatter
    ved Ferskvannsøkologi ved Norsk institutt for vannforskning
  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Oslo

Maryia Khomich

  • Tilknyttet:
    Forfatter
    ved Seksjon for genetikk og evolusjonsbiologi ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Trygg og holdbar mat ved NOFIMA

Marcia Kyle

  • Tilknyttet:
    Forfatter
    ved Oslo
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