I.B. Kucherov

On the subdivision of distribution types of multizonal and multiregional species for the purposes of adjoint analysis of vascular, bryophyte and lichen floras

Year: 2016, Issue: LXIV, Pages: 138 - 197

The subdivision of distribution types within the multizonal and multiregional fractions of the flora makes possible the adjoint phytogeographical analy- sis of the floras and cenotic floras of vascular plants, bryophytes and lichens, using two phytogeographical coordinates, latitudinal and chorionomic, which reflect the position of a species area within the system of floristic kingdoms and regions of the Earth. When defining the distribution types within the multizonal fraction, the northern-, temperate-, southern-, and pan-multizonal groups  of range types, with further subdivision following the principle of maximal species occurrence and abundance within its area, can be distinguished. The main groups of elements in the frame of multiregional fraction of the flora are: bipolar, hemispheric (with further subdivision into North- and South hemisphere species), sub-meridional, pantropical, and subcosmopolitan ones. The adjoint phytogeographical approach seems to be appropriate when studying the «young» Qua- ternary floras and cenotic floras, especially migratory ones. It can be applied as additional tool when analyzing the flora formation and it is suitable to distin- guish the ecological-geographical «corteges» of joint species distribution.

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