Diversity dependence of species of urban floras on a number of factors
On the basis of information on species number in the floras of 54 Russian cities the dependences of species diversity of urban floras on several factors (area, population and geographical location) were analyzed. According to the results of correlation and regression analysis the population density is one of the determining factors. Factors of geographic location (latitude and longitude) play a credible role in changing the proportions of native and invasive species.