Аннотация: отзыв на монографию профессора И.И. Смольянинова (на английском языке)
Review
of the monograph by
A.A. Ryabokon" "Urban Flora of Kharkiv"
The author has carried out great research on study and analysis of Kharkiv urban flora, that had been planed as the dissertation.
The critical thorough study of Kharkiv urban flora has been done for the first time that proves scientific novelty of the paper.
Critical analysis of the investigated urban flora showed that it includes 1236 species, 533 kinds and 123 families. 22 basic families, that is 77 % of all species are revealed on the basis of taxonomical and typological analysis of urban flora.
Ecological structure analysis showed that eumesophytes (330 species, i.e. 28 %) prevail over the rest groups and the share of xerophilous groups is increased.
Urban flora dynamics has been studied for the last 100 years.
Instability of urban flora is noticed as a result of high level of terrophytes in its structure (260 species, i.e. 21 %). The component that influences instability is an alien fraction (289 species, i.e. 24 %) among which terrophytes make up the half (143 species).
Flora genesis, according to the author, spreads in two directions: on the one hand, qualitative and quantitative decrease of autochthonous fraction (disappearance of species or decreasing of populations); on the other hand, increasing of the share of alien fraction (its species are on different levels of naturalization).
These factors naturally influence the formation of present-day flora.
The separate charter is devoted to herbs and their role they play in both fractions.
Peculiarities of species supply distribution are determined (space differentiation of ecotopes is in the most of "mosaic" character).
Urban flora development tendencies are revealed as a whole by the author. The directions of this development are as follows: unification, cosmopolitization, synanthropisation, xerophytysation, increase of alien fraction and decrease of autochthonous one.
The depth and level of research and the supply of the facts given in the monograph correspond to the level of the dissertation (thesis).