Species diversity of weeds in the territory of Kolpino (St. Petersburg)

Abstract

Weeds are an integral part of the flora of any region. The study of the species composition of weeds not only within agroecosystems, but also on the territory of settlements allows you to obtain more complete information about the distribution of different species. The purpose of the study is to identify the species diversity of weeds and its features in the territory of Kolpino (St. Petersburg). New data have been obtained on the species diversity of weeds in the city. The analysis of monitoring data on the surveyed habitats revealed 97 species of weeds from 76 genera and 20 families. Perennial species predominate in life expectancy. A systematic structure of species composition has been established. Nine families predominant in terms of the number of species are distinguished. Calculation of occurrence and assessment of its constancy by classes were carried out. About 2/3 of the identified species have low constancy classes. Groups of 27 dominant and 19 concomitant species were identified. A relationship has been established between the species compositions of weeds in Kolpino and fields of the Leningrad Region - 84% of weeds that dominate the fields of the region are present to varying degrees in the city.