On the Assessment of the Structural Organization of Phytoplankton (Lake Bol'shoe Miassovo,the Southern Urals)

Ordination methods were applied to the identification of structural units in the phytoplankton community. The groups of phytoplanktonic species identified by the time gradient and the method of cluster analysis of species lists were compared. The structural complexity of the phytoplankton community was evaluated using the index of cenotic significance (ICS) and derivative calculation coefficients. A high degree of similarity in the structure of dominance between the zooplanktonic and phytoplanktonic communities of the water body was revealed.