ALGAL FLORA OF LAKES IN THE HIGH TATRA MOUNTAINS (SLOVAKIA)

Eighty seven from a total of 120 lakes in the Slovak part of the High Tatra Mts. have been visited since 1982. Their summer phytoplankton an d algae growing on stones were collected, identified and documented. S ome species that are interesting, rare, or not previously known in Slo vakia have been found: Clastidium setigerum, Colacium calvum, Chroococ cus subnudus, Chr. quaternarius, Coelastrum printzii, Coenocystis quad riguloides, Oocystis naegelii, Scopulonema polonicum, Thelesphaera alp ina, Trochiscia prescottii. The number of algal species, found in the open water of the lakes, decrease with altitude and increase with pH.