Aquatic and Semiaquatic Vegetation in Yaroslavl Oblast (Review)

Resumo

Aquatic and semiaquatic vegetation in Yaroslavl oblast has a long history of study and is described in detail for different types of waterbodies. The present summary report includes 65 formations. There are 36 formations in the hydrophilic vegetation of lakes, 39 in reservoirs, 39 in ponds, and 42 in rivers. More than half of the total list is made up of formations with the dominance of helophytes. Unique data have been obtained which make possible to trace changes in the structure of the lake vegetation in the course of natural succession and the formation of the reservoir vegetation since its filling as a result of long-term observations conducted by researchers in the waterbodies of the region. The penetration of alien species into the territory of the region can change the structure of hydrophilic vegetation.