HIERARCHICAL COMPOSITION OF FLORAE AND DETERMINATION OF FLORISTIC TYPES OF TERRITORIES

Ivanova Anastasia Viktorovna, Candidate of biological sciences, Institute of Ecology of the Volga River Basin of RAS (10 Komzina street, Togliatti, Russia), nastia621@yandex.ru

581.9

10.21685/2307-9150-2016-3-4

Background. The article is devoted to methodological aspects of determination of floristic types of territories. Determination of a type of flora by species lists of administrative subjects of any type is not precise. The author suggests an approach to ascertain a floristic structure of a territory at the level of whole florae, based on determination of a floristic type by the third member of a family range.
Materials and methods. In the study there were used 29 floristic descriptions from the database FD SUR, recorded in the territory of two landscape areas of Sa-mara region.
Results. By the composition of two major families there have been revealed changes of two florae, described in the territories of various landscape areas. The has displayed the difference of two types of florae within a single climatic and natural zone.
Conclusions. Studies of foristic lists of administrativesubjects give only an approximate picture of borders of floristic types, determined by the third member of a family range. Floristic types of territories are recommended to be determined by performing series of descriptions with further unification of lists. Herewith, a flo-ristic type of territory for Samara region can be reliably determined in the interval of 600–900 species.

family range, type of flora, floristic descriptions.

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