TY JOUR TI MORPHOLOGICAL VARIABILITY OF SPECIES OF THE GENUS NAVICULA (BACILLARIOPHYTA) INTERESTING FOR THE FLORA OF RUSSIA KW tributaries of the Svir River (Lake Ladoga basin) KW phytobenthos KW Bacillariophyta KW Navicula KW elekcron microscopy KW morphological variability JO Transactions of Papanin Institute for Biology of Inland Waters RAS AU Genkal, S.I. AU Komulaynen, S.F. PY 2024 IS 0 PB Papanin Institute for Biology of Inland Waters Russian Academy of Sciences