Cristin-resultat-ID: 1343293
Sist endret: 30. september 2017 13:56
NVI-rapporteringsår: 2016
Resultat
Vitenskapelig artikkel
2016

From facilitation to competition: temperature-driven shift in dominant plant interactions affects population dynamics in seminatural grasslands

Bidragsytere:
  • Siri Lie Olsen
  • Joachim Paul Töpper
  • Olav Skarpaas
  • Vigdis Vandvik og
  • Kari Klanderud

Tidsskrift

Global Change Biology
ISSN 1354-1013
e-ISSN 1365-2486
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2016
Volum: 22
Hefte: 5
Sider: 1915 - 1926

Importkilder

Scopus-ID: 2-s2.0-84961927468

Beskrivelse Beskrivelse

Tittel

From facilitation to competition: temperature-driven shift in dominant plant interactions affects population dynamics in seminatural grasslands

Sammendrag

Biotic interactions are often ignored in assessments of climate change impacts. However, climate-related changes in species interactions, often mediated through increased dominance of certain species or functional groups, may have important implications for how species respond to climate warming and altered precipitation patterns. We examined how a dominant plant functional group affected the population dynamics of four co-occurring forb species by experimentally removing graminoids in seminatural grasslands. Specifically, we explored how the interaction between dominants and subordinates varied with climate by replicating the removal experiment across a climate grid consisting of 12 field sites spanning broad-scale temperature and precipitation gradients in southern Norway. Biotic interactions affected population growth rates of all study species, and the net outcome of interactions between dominants and subordinates switched from facilitation to competition with increasing temperature along the temperature gradient. The impacts of competitive interactions on subordinates in the warmer sites could primarily be attributed to reduced plant survival. Whereas the response to dominant removal varied with temperature, there was no overall effect of precipitation on the balance between competition and facilitation. Our findings suggest that global warming may increase the relative importance of competitive interactions in seminatural grasslands across a wide range of precipitation levels, thereby favouring highly competitive dominant species over subordinate species. As a result, seminatural grasslands may become increasingly dependent on disturbance (i.e. traditional management such as grazing and mowing) to maintain viable populations of subordinate species and thereby biodiversity under future climates. Our study highlights the importance of population-level studies replicated under different climatic conditions for understanding the underlying mechanisms of climate change impacts on plants. Keywords: biotic interactions, climate change, integral projection model, plant population dynamics, removal experiment, temperature and precipitation gradients, Veronica, Viola

Bidragsytere

Siri Lie Olsen

  • Tilknyttet:
    Forfatter
    ved Miljøvitenskap og naturforvaltning ved Norges miljø- og biovitenskapelige universitet
  • Tilknyttet:
    Forfatter
    ved NINA Oslo ved Norsk institutt for naturforskning

Joachim Paul Töpper

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved Institutt for miljø- og naturvitskap ved Høgskulen på Vestlandet

Olav Skarpaas

  • Tilknyttet:
    Forfatter
    ved NINA Oslo ved Norsk institutt for naturforskning

Vigdis Vandvik

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

Kari Klanderud

  • Tilknyttet:
    Forfatter
    ved Miljøvitenskap og naturforvaltning ved Norges miljø- og biovitenskapelige universitet
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