Phytopsammon and phytoplankton of land/water ecotone of mesotrophic lake in the Polesie Region (Eastern Poland)

In the years 1996-1997 (in July and September) a species composition as well as a productivity of phytopsammon (eupsammon. and hydropsammon) and phytoplankton were investigated in a land/water ecotone of mesotrophic lake. The phytopsammon was characterized by a,higher number of species and higher algae abundance than that of phytoplankton. The highest values of gross primary production and chlorophyll a concentration were obtained for eupsammon, while the lowest ones were obtained for phytoplankton. A big similarity of eupsammon and hydropsammon and a considerable diversity between.eupsammon and phytoplankton was proved.