Synanthropization of small towns’ flora (Krasnoyarsk region)

Abstract

The aim of this work is to identify the features of the synanthropic component of the flora of Sosnovoborsk, a satellite town of the regional center of Krasnoyarsk (Krasnoyarsk region). Based on the study of 7 model sections within the administrative boundaries of Sosnovoborsk, which differ in the phytocenotic diversity of the landscape and the characteristics of the anthropogenic load, the composition and structure of the synanthropic fraction of the flora: the share of apophytes and advents, hemerophiles and hemerophobes, synanthropic groups of species according to the degree of naturalization and certain activity criteria, were chosen. It was established that there was a prevalence of apophytes in the city flora (92%), where 54.2% of the total number of apophytes there were hemerophiles, which is generally typical of urban floras. Among minor advents (8.0%), colonophytes dominate (54.8% of the advent fraction). The basis of the synanthropic fraction of the flora of Sosnovoborsk (57.9% of the total flora) is rural species (according to I. Hensky) - 45.5%, consisting only of apophytes and found in all model sections of the city. At the present stage, a change in the floristic composition of Sosnovoborsk is due to urban-philic species (54.2%). The low adventization index (0.08) arises from the predominance of colonophytes (54.8% of the adventitious fraction), as well as the content of adventitious species in the composition of small satellites (58.1% of the adventitious fraction) and citizens (41,9 %).