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dc.contributor.authorVirtanen, Risto
dc.contributor.authorOksanen, Lauri Kalervo
dc.contributor.authorOksanen, Tarja Maarit
dc.contributor.authorCohen, Juval
dc.contributor.authorForbes, Bruce C.
dc.contributor.authorJohansen, Bernt
dc.contributor.authorKäyhkö, Jukka
dc.contributor.authorOlofsson, Johan
dc.contributor.authorPulliainen, Jouni
dc.contributor.authorTømmervik, Hans
dc.identifier.citationEcology and Evolution 2015nb_NO
dc.description.abstractAccording to some treatises, arctic and alpine sub-biomes are ecologically similar, whereas others find them highly dissimilar. Most peculiarly, large areas of northern tundra highlands fall outside of the two recent subdivisions of the tundra biome. We seek an ecologically natural resolution to this long-standing and far-reaching problem. We studied broad-scale patterns in climate and vegetation along the gradient from Siberian tundra via northernmost Fennoscandia to the alpine habitats of European middle-latitude mountains, as well as explored those patterns within Fennoscandian tundra based on climate–vegetation patterns obtained from a fine-scale vegetation map. Our analyses reveal that ecologically meaningful January–February snow and thermal conditions differ between different types of tundra. High precipitation and mild winter temperatures prevail on middle-latitude mountains, low precipitation and usually cold winters prevail on high-latitude tundra, and Scandinavian mountains show intermediate conditions. Similarly, heath-like plant communities differ clearly between middle latitude mountains (alpine) and high-latitude tundra vegetation, including its altitudinal extension on Scandinavian mountains. Conversely, high abundance of snowbeds and large differences in the composition of dwarf shrub heaths distinguish the Scandinavian mountain tundra from its counterparts in Russia and the north Fennoscandian inland. The European tundra areas fall into three ecologically rather homogeneous categories: the arctic tundra, the oroarctic tundra of northern heights and mountains, and the genuinely alpine tundra of middlelatitude mountains. Attempts to divide the tundra into two sub-biomes have resulted in major discrepancies and confusions, as the oroarctic areas are included in the arctic tundra in some biogeographic maps and in the alpine tundra in others. Our analyses based on climate and vegetation criteria thus seem to resolve the long-standing biome delimitation problem, help in consistent characterization of research sites, and create a basis for further biogeographic and ecological research in global tundra environments.nb_NO
dc.rightsNavngivelse 3.0 Norge*
dc.subjectbiome delimitationnb_NO
dc.subjecttundra ecosystemsnb_NO
dc.subjectvegetation patternnb_NO
dc.subjectwinter climate.nb_NO
dc.titleWhere do the treeless tundra areas of northern highlands fit in the global biome system: toward an ecologically natural subdivision of the tundra biomenb_NO
dc.typePeer reviewednb_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480nb_NO
dc.source.journalEcology and Evolutionnb_NO

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