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Den holarktiske sone

Den holarktiske sone

Den holarktiske sone, eller holarktis, beskriver de to økosonene den palearktiske sone og nearktis i et faunistisk og floristisk samlebegrep.[1][2] Begrepet benyttes innen økologien for å beskrive en utvidet zoogeografisk regionden nordlige halvkule, der arter kan eksistere på kryss av økosonene. Eksempler er for eksempel ulv (Canis lupus) og brunbjørn (Ursus arctos).

Den palearktiske sone består av ulike økoregioner i hele Europa og Afrika nord for Sahara, samt Asia sør til Himalaya. Den nearktiske sone omfatter økoregioner på Grønland og i hele Nord-Amerika sør til Mexico.

Referanser

[rediger | rediger kilde]
  1. ^ Udvardy, M. D. F. (1975). A classification of the biogeographical provinces of the world Arkivert 11. august 2011 hos Wayback Machine.. IUCN Occasional Paper no. 18. Morges, Switzerland: IUCN.
  2. ^ Gjærevoll, O. (1992). Plantegeografi (2 utg.). Tapir. s. 62–66. ISBN 82-519-1104-4. 
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Den holarktiske sone
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