The boreal kingdom is part of the Holarctic kingdom in floristic zoning in biogeography . It includes: the Circumboreal region , the East Asian region , the Atlantic-North American region and the Rocky Mountain Region .
In the Holarctic it is the most extensive sub-kingdom, its flora is the richest, there are more endemic families here than in the other two. For some of its areas is characterized by a large number of ancient and primitive forms of vegetation, relics.
The boreal zone is a zone with well-pronounced snowy winters and a rather warm short summer. In Eurasia, it extends from the tundra zone to 50 ° c. sh., and in North America - from the Arctic zone to 40 ° c. sh. [one]
Notes
Literature
- Voronov A.G. , Drozdov N.N. , Krivolutsky D.A. , Myalo E.G. Biogeography with the basics of ecology. - M .: MGU Publishing House, 1999. - 392 p. - ISBN 5-211-04155-0 .