Cristin-resultat-ID: 1144413
Sist endret: 8. oktober 2018, 10:24
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2014

The influence of physical factors on kelp and sea urchin distribution in previously and still grazed areas in the NE Atlantic

Bidragsytere:
  • Eli Rinde
  • Hartvig C Christie
  • Camilla With Fagerli
  • Trine Bekkby
  • Hege Gundersen
  • Kjell Magnus Norderhaug
  • mfl.

Tidsskrift

PLOS ONE
ISSN 1932-6203
e-ISSN 1932-6203
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Volum: 9
Hefte: 6
Artikkelnummer: 100222.
Open Access

Importkilder

Scopus-ID: 2-s2.0-84903386075

Beskrivelse Beskrivelse

Tittel

The influence of physical factors on kelp and sea urchin distribution in previously and still grazed areas in the NE Atlantic

Sammendrag

The spatial distribution of kelp (Laminaria hyperborea) and sea urchins (Strongylocentrotus droebachiensis) in the NE Atlantic are highly related to physical factors and to temporal changes in temperature. On a large scale, we identified borders for kelp recovery and sea urchin persistence along the north-south gradient. Sea urchin persistence was also related to the coast-ocean gradient. The southern border corresponds to summer temperatures exceeding about 10 C, a threshold value known to be critical for sea urchin recruitment and development. The outer border along the coast-ocean gradient is related to temperature, wave exposure and salinity. On a finer scale, kelp recovery occurs mainly at ridges in outer, wave exposed, saline and warm areas whereas sea urchins still dominate in inner, shallow and cold areas, particularly in areas with optimal current speed for sea urchin foraging. In contrast to other studies in Europe, we here show a positive influence of climate change to presence of a long lived climax canopy-forming kelp. The extent of the coast ocean gradient varies within the study area, and is especially wide in the southern part where the presence of islands and skerries increases the area of the shallow coastal zone. This creates a large area with intermediate physical conditions for the two species and a mosaic of kelp and sea urchin dominated patches. The statistical models (GAM and BRT) show high performance and indicate recovery of kelp in 45–60% of the study area. The study shows the value of combining a traditional (GAM) and a more complex (BRT) modeling approach to gain insight into complex spatial patterns of species or habitats. The results, methods and approaches are of general ecological relevance regardless of ecosystems and species, although they are particularly relevant for understanding and exploring the corresponding changes between algae and grazers in different coastal areas.

Bidragsytere

Eli Rinde

  • Tilknyttet:
    Forfatter
    ved Marin biologi ved Norsk institutt for vannforskning

Hartvig C Christie

  • Tilknyttet:
    Forfatter
    ved Marin biologi ved Norsk institutt for vannforskning

Camilla With Fagerli

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Oslo
  • Tilknyttet:
    Forfatter
    ved Marin biologi ved Norsk institutt for vannforskning
Aktiv cristin-person

Trine Bekkby

  • Tilknyttet:
    Forfatter
    ved Marin biologi ved Norsk institutt for vannforskning
  • Tilknyttet:
    Forfatter
    ved Geo-økologisk forskningsgruppe ved Universitetet i Oslo
Aktiv cristin-person

Hege Gundersen

  • Tilknyttet:
    Forfatter
    ved Marin biologi ved Norsk institutt for vannforskning
  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Oslo
1 - 5 av 7 | Neste | Siste »