Long-term changes in 0+ fish assemblages in the littoral zone of heated lakes. [Pt.]1. Diversity, evennes and dynamic phase portrait of species structure

Tereshchenko, V.G.,Institute of Biology of Inland Waters, Borok; Kapusta, A.; Wilkonska, H.,Inland Fisheries Institute, Olsztyn . Dept. of Ichthyology; Strelnikova, A.P.,Institute of Biology of Inland Waters, Borok

Long-term changes in 0+ fish assemblages in the littoral zone of heated lakes. [Pt.]1. Diversity, evennes and dynamic phase portrait of species structure

2007

Tereshchenko, V.G.,Institute of Biology of Inland Waters, Borok (Russia) | Kapusta, A. | Wilkonska, H.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Ichthyology | Strelnikova, A.P.,Institute of Biology of Inland Waters, Borok (Russia)

The structure and characteristics of the dynamics of differentiation in the 0+ fish assemblages in lakes with varied morphometrics, intensity, and various periods of water heating, was analysed from 1966 to 2000 years. The study was performed in three lakes in Poland: Lake Lichenskie, Lake Goslawskie, Lake Slesinskie. Species domination and variation were defined by characterizing the fish assemblages. The occurrence of 24 fish species belonging to 7 families was confirmed. Changes in the composition and variety of the autochthonous ichthyofauna resulted from water heating and increased water flow. The analysis of the phase diagram trajectory indicated instability and variation in the 0+ fish assemblages of the lakes that were heated most intensely. The fish assemblage that exhibited the greatest diversity fluctuation was noted in the lake heated the most and with the most stable water exchange

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