TY JOUR TI PIGMENT CONTENT IN PHYTOPLANKTON, EPIPHYTON AND BOTTOM SEDIMENTS OF LAKE NERO KW chlorophyll a KW pheopigments KW phytoplankton KW epiphyton KW bottom sediments JO Transactions of Papanin Institute for Biology of Inland Waters RAS AU Sigareva, L.E. AU Timofeeva, N.A. AU Meteleva, N.Y. PY 2020 IS 0 PB Papanin Institute for Biology of Inland Waters Russian Academy of Sciences