Home – Home – Jornals – Contemporary Problems of Ecology 2009 number 6

The concentration of phytoplankton photosynthetic pigments was monitored every decade on the Biya River outflow at the site located in the direct vicinity of Lake Teletskoye, from July 1998 till December 2001. The phytoplankton pigment characteristics in this site and in the surface layer of the lake area were compared. Processes of lake phytoplankton development and functioning are represented in full at the river site, as are changes of pigment composition that follow dynamic regularities. On the basis of seasonal variations of pigment concentration and ratios, the main phases of planktonic algal cenoses development were revealed. The comparison of phytoplankton seasonal dynamics in this deep oligotrophic lake and the lakes of different types in the temperate zone was made. The trophic status of the pelagic zone and outflow at the Biya River defined by chlorophyll a content corresponds to the ultraoligotrophic-oligotrophic one. The relationship between green and yellow pigments classifies Lake Teletskoye as a water body of «carotene» type. A lack of linear relationship between chlorophyll a content and water level, as well as weak correlation with nutrients, testify to a complex interdependence resulting from synchronous effect of abiotic and biotic factors.