A. Kowalczewski et T. Ozimek, FURTHER LONG-TERM CHANGES IN THE SUBMERGED MACROPHYTE VEGETATION OF THE EUTROPHIC LAKE MIKOLAJSKIE (NORTH POLAND), Aquatic botany, 46(3-4), 1993, pp. 341-345
On the basis of quantitative sampling of submerged vegetation, repeate
d in Lake Mikolajskie a further 10 years after the last survey, and co
mpared with 1980, 1971 and 1963, continuing changes are reported. Ther
e was a further decrease of the depth range and thus of the colonized
area. The frequency and percentage contribution of some formerly abund
ant species diminished, as the submerged vegetation continued to chang
e to a Myriophyllum-Potamogeton assemblage.