Demographic characteristics of species Tulipa L.South Ural

The results of the study of demographic characteristics (size, density, age spectra and population indices) of the three species of the genus Tulipa, living on the territory of the Republic of Bashkortostan: tulip Bieberstein ( Tulipa bibebershteniana Schult. et Schult. fil.), wilted tulip ( T. patens Agardh ex Schult. Et Schult. Fil.), and so riverine - T. riparia Knjasev, Kulikov et Philippov. It is shown that the species have different ratios of age groups at baseline and averaged spectra of developmental, different strategies of reproduction and dispersal. The influence of phytocenosis and human impact on the age populations spectra.