Image: Floristic regions in Europe (english)

Description: Floristic regions in Europe and western Siberia, according to Wolfgang Frey and Rainer Lösch The central european region and the central russian region are sister regions. The border between them is similar to the Fagus sylvatica limit (January, day-time temperature average: above -2°C). The border between the central russian region and the boreal region is similar to the Quercus spp. limit (Day-time temperature average: above 10°C, 4 months per year). The border between the boreal region and the arctic region is similar to the tree line, taiga/ arctic tundra limit (July, day-time temperature average: above 10°C). The border of the atlantic region is the limit of no frost (average), Gulf Stream influence. The warm islands in the Atlantic ocean are in the macaronesia region: isolated populations in a more humid environment. The mediterranean region is similar to the occurrence of wild Olea europea and wild Cistus salviifolius (Olea europea is grown very North in Italy). The border between the submediterranean region and the central european region is similar to the alpine arc (upper Rhone, upper Rhine, lower Danube), a weather barrier. The pontic region border is similar to the tree line/ steppe limit (less than 450 mm precipitation per year). The turanian region has a semi-arid climate. References: Frey W, Lösch R (2004) Lehrbuch der Geobotanik. Elsevier, Spektrum; München, Heidelberg; ISBN 3-8274-1193-9 (graphic modified from Walter H (1954) Grundlagen der Pflanzenverbreitung. Einführung in die Pflanzengeographie, II. Teil: Arealkunde. Ulmer, Stuttgart-Ludwigsburg) Frey W, Lösch R (2010) Geobotanik: Pflanzen und Vegetation in Raum und Zeit. 3 ed, Spektrum, Heidelberg, ISBN 978-3-8274-2335-1
Title: Floristic regions in Europe (english)
Credit: Own work
Author: User:Olahus
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License: Public domain
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