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dc.contributor.authorNyléhn, Joruneng
dc.contributor.authorTotland, Ørjaneng
dc.date.accessioned2008-01-25T14:15:51Z
dc.date.available2008-01-25T14:15:51Z
dc.date.issued1999eng
dc.identifier.citationArctic, antarctic and alpine research 1999 31 (3): 259-263. Copyright, Regents of the University of Coloradoen
dc.identifier.issn1523-0430eng
dc.identifier.urihttp://hdl.handle.net/1956/2561
dc.description.abstractThe effects of temperature and "natural disturbance" on growth, seed production, and population density in the facultative hemiparasitic annual Euphrasia frigida (Scrophulariaceae) were examined in the middle alpine zone at Finse, southwest Norway. Experimentally elevated temperature increased growth and seed production significantly. Higher temperatures resulted in a small decrease in population densities during three seasons. The degree of "natural disturbance" did not influence growth and seed production, but population density was highest at intermediate disturbance levels. Thus, while temperature influenced the performance of E. frigida, disturbance affected the population dynamics. The effects of temperature on growth and reproduction may also be indirect on hemiparasites, through improved conditions for the host plants under elevated temperatures. It is hypothesized that the predicted global warming will result in increased seed output from E. frigida plants in the middle alpine zone. Population densities, however, are likely to decrease under elevated temperatures, due to lower disturbance levels by frost heave and increased vegetation coveren
dc.language.isoengeng
dc.publisherThe Institute of Arctic and Alpine Researcheng
dc.titleEffects of temperature and natural disturbance on growth, reproduction, and population density in the alpine annual hemiparasite euphrasia frigidaeng
dc.typePeer reviewedeng
dc.typeJournal articleeng
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480nob
bora.peerreviewedPeer reviewedeng


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