Палеогеографические аспекты происхождения северотаежных лиственничников Якутии

Abstract

The work is the result of the analysis of floristic geographical elements of the forest complex of northern forests on the example of larch forests of Yano-Indigirka interfluve. It is concluded that the formation and distribution of northern larch forests in northeast Asia is directly linked with the development of the permafrost zone in the Early Pleistocene. The structure and species composition of the northern taiga flora shows its close relationship with tundra phytocenoses with which it has a common component in the form of indigenous Hypoarctic core and common evolutionary history during the Pleistocene. At the same time, forest floristic complex is enough original, and the boreal element of the flora does not have transcontinental links what are usual for dark taiga and tundra, and this fact once again shows the absence of forests in the Pleistocene history of Beringia.