Phytocoenology and population structure of species of the genus Malva L. in the Ganja-Gazakh region (Azerbaijan)

The article presents the results of a study of the mallow genus - Malva L. characteristic of the meadow vegetation of the Ganja-Gazakh region of the Republic of Azerbaijan. From 11 species of the genus Malva L. distributed on the territory of Azerbaijan, 4 species (Malva sylvestris L., Malva nicaeensis All., Fl. Pedem, Malva pusilla Sm., Malva parviflora L.) are found in the Ganja-Gazakh region. The species M. parviflora was first identified by us in this territory. The species M. parviflora and M. sylvestris are not widely distributed in this territory. The structure of populations of M. pusilla and M. nicaeensis species was studied. 7 populations in which M. pusilla and M. nicaeensis species are distributed were phytocoenological evaluated. 3 cenopopulations in which the species M. nicaeensis is common were evaluated in different years. All groups of plant ontogenesis are found in the studied populations. It was found that in different years in the populations of these two species of the genus mallow, recovery is weak, and aging is intense. During the analysis of the population structure, reproduction indices - Ib and aging - Iq were determined, which are important population indicators. The integral characteristic of the demographic structure of M. pusilla and M. nicaeensis species is determined, the populations are estimated, the composition, age (height) and the degree of effectiveness of their ontogenesis are studied. The dynamics of changing ontogenesis in the cenopopulations of M. pusilla and M. nicaeensis species in various environmental conditions, depending on the positive or negative influence of its factors on the structure of ontogenesis, is revealed.