Interannual dynamics of summer phytoplankton in the mouth region of the Kazanka river (Kazan)

The article presents the results of studying phytoplankton in the mouth region of the Kazanka river (Kazan) in the summer period of 2017-2019. The main role in the formation of structural characteristics of summer phytoplankton belongs to diatoms and blue-green algae, an important value - cryptophytes, green and dinophytes. During the mass development of blue-green plants, the structure of the algoflora shows signs of simplification - there is a decrease in species diversity and equalization. The trophic status of the estuary area of the river corresponds to mesotrophic-high-trophic conditions.