Sirkumpolar utbreiing

Isbjørn er eit døme på eit dyr som har ei sirkumpolar utbreiing rundt nordpolen.

Sirkumpolar utbreiing er eit utbreiingsområde hjå ein art eller ei biologisk gruppe som er meir eller mindre samanhengande rundt enten nord- eller sørpolen.[1] Utbreiingsområdet kan ligge både i den tempererte og i den kalde sona. I ei snever tyding kan det visa til artar med utbreiing innanfor polarregionane.[2]

Nokre døme på sirkumpolare dyreartar er rein[3], isbjørn[4], fjellrev[3][5], snøugle[5], snøsporv[5], praktærfugl[5], ringgås[5] og fjelljo[5] i nord, og weddellsel[3] og adeliepingvin[3] i sør. Nokre nordlege sirkumpolare vekstar er harerug,[6] fjellpryd,[7] polarreddik,[2] raudsildre[8] og strandarve.[9]

Sjå òg

Kjelder

  1. ↑ Cirkumpolär Nationalencyklopedin, webbupplagan. Läst 8 januari 2016
  2. ↑ 2,0 2,1 «Circumpolar distribution». Oxford Reference. Oxford University Press. Henta 19 november 2014. 
  3. ↑ 3,0 3,1 3,2 3,3 Vladimir Kotlyakov; Anna Komarova: Elsevier's Dictionary of Geography: in English, Russian, French, Spanish and German, Elsevier, 2006, s. 119. 
  4. ↑ T. Kue Young: Circumpolar Health Atlas, University of Toronto Press, 2011, s. 21-33. ISBN 978-1-4426-4456-4. 
  5. ↑ 5,0 5,1 5,2 5,3 5,4 5,5 Y. I. Chernov: The Living Tundra «Distribution of animals and plants», Cambridge University Press, 1988, Studies in Polar Research, s. 101–118. ISBN 9780521357548. 
  6. ↑ «Bistorta vivipara (L.)S.F. Gray», svalbardflora.no 
  7. ↑ «fjellpryd». Store norske leksikon (på norsk). 21. januar 2023. 
  8. ↑ Moore, Peter D.: Ecosystem Series - Tundra, Infobase Publishing, 2009, s. 64–85. ISBN 9781438118727. 
  9. ↑ Julia Sánchez Vilas: =Sexual dimorphism in ecological and physiological traits in the subdioecious dune plant Honckenya peploides (L.) Ehrh., Universidade de Santiago de Compostela, 2008. 

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