Cristin-resultat-ID: 1238044
Sist endret: 19. februar 2016 11:07
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig artikkel
2015

There is more to climate than the North Atlantic Oscillation: a new perspective from climate dynamics to explain the variability in population growth rates of a long-lived seabird

Bidragsytere:
  • Michel d. S. Mesquita
  • Kjell E Erikstad
  • Hanno Sandvik
  • Robert Barrett
  • Tone Reiertsen
  • Tycho Anker-Nilssen
  • mfl.

Tidsskrift

Frontiers in Ecology and Evolution
ISSN 2296-701X
e-ISSN 2296-701X
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015
Publisert online: 2015
Volum: 3
Hefte: 43
Open Access

Finansiering

  • Norges forskningsråd

    • Prosjektkode: 223257
  • Andre

    • Prosjektkode: Framsenteret
  • Egen institusjon

    • Prosjektkode: Norsk institutt for naturforskning (NINA)

Beskrivelse Beskrivelse

Tittel

There is more to climate than the North Atlantic Oscillation: a new perspective from climate dynamics to explain the variability in population growth rates of a long-lived seabird

Sammendrag

Predicting the impact of global climate change on the biosphere has become one of the most important efforts in ecology. Ecosystems worldwide are changing rapidly as a consequence of global warming, yet our understanding of the consequences of these changes on populations is limited. The North Atlantic Oscillation (NAO) has been used as a proxy for “climate” in several ecological studies, but this index may not always explain the patterns of variation in populations examined. Other techniques to study the relationship between ecological time series and climate are therefore needed. A standard method used in climatology is to work with point maps, where point correlation, point regression or other techniques are used to identify hotspots of regions that can explain the variability observed in the time series. These hotspots may be part of a teleconnection, which is an atmospheric mode of variability that affects remote regions around the globe. The NAO is one type of teleconnection, but not all climate variability can be explained through it. In the present study we have used climate-related techniques and analyzed the yearly variation in the population growth of a Common Guillemot Uria aalge colony in the Barents Sea area spanning 30 years. We show that the NAO does not explain this variation, but that point analysis can help identify indices that can explain a significant part of it. These indices are related to changes of mean sea level pressure in the Barents Sea via the Pacific—forming a teleconnection-type pattern. The dynamics are as follows: in years when the population growth rate is higher, the patterns observed are that of an anomalous low-pressure system in the Barents Sea. These low-pressure systems are a source of heat transport into the region and they force upwelling mixing in the ocean, thus creating favorable conditions for a more successful survival and breeding of the Common Guillemot.

Bidragsytere

Aktiv cristin-person

Michel Dos Santos Mesquita

Bidragsyterens navn vises på dette resultatet som Michel d. S. Mesquita
  • Tilknyttet:
    Forfatter
    ved Uni Research Klima ved NORCE Norwegian Research Centre AS

Kjell E Erikstad

  • Tilknyttet:
    Forfatter
    ved NINA Tromsø ved Norsk institutt for naturforskning
  • Tilknyttet:
    Forfatter
    ved Institutt for biologi ved Norges teknisk-naturvitenskapelige universitet

Hanno Sandvik

  • Tilknyttet:
    Forfatter
    ved Institutt for biologi ved Norges teknisk-naturvitenskapelige universitet

Robert Barrett

  • Tilknyttet:
    Forfatter
    ved Seksjon for naturvitenskap ved UiT Norges arktiske universitet

Tone Kristin Reiertsen

Bidragsyterens navn vises på dette resultatet som Tone Reiertsen
  • Tilknyttet:
    Forfatter
    ved Seksjon for naturvitenskap ved UiT Norges arktiske universitet
  • Tilknyttet:
    Forfatter
    ved NINA Tromsø ved Norsk institutt for naturforskning
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