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Periphytic organisms inhabiting biotic and artificial substrates in Polish lagoons, locally known as „coastal lakes” are little known. In the frames of an interdisciplinary studies on the revitalisation of eutrophicated Lake Kopań, a study on different ecological formations, including the periphyton formations inhabiting Phragmites australis (CAV.) TRIN. ex STEUD. and artificial stilon (Polish trade name of a nylon) substrates, was carried out in 1999.
It was demonstrated, that the average concentration of periphytic algae on reed in Lake Kopań amounted to 104 000 cells m-2, periphytic microfauna - 54 874 specimens m-2; and macrofauna - 1 598 specimens m-2. The concentration of periphyton on the studied biotic substrate was considerably lower compared to the organisms growing on the artificial substrate (potato-bag fabric, stilon fabric, foil), which were placed in Lake Kopań. The periphytic formation will play a significant role in the revitalisation project of the lake, by purification and deeutrophication of the waters, and in creating an additional, abundant food base for extensive culture of the rainbow trout.
Key words: periphyton, fouling, revitalisation of coastal lakes, mariculture