Abstract
A brief review of the limnology of central European waters indicated that, except for calcium in the bottom sediments, mesotrophic lakes were intermediate in nutrient concentrations between oligotrophic and eutrophic waters. Other biotic characteristics also attained maxima in mesotrophic lakes. For example, the existence of distinctive phytoplankton, invertebrate, and fish communities, implied certain qualitative properties of mesotrophic waters rather than only quantitative intermediacy on the oligotrophic–eutrophic cline. These properties, in part, represent some aspects of percid habitat that differ from those of other fish communities. Key words: Percidae, algae, bottom sediments, cultural effects, eutrophication, limnology, mesotrophy, trophic levels, primary production

This publication has 0 references indexed in Scilit: