The EVALUATION OF LIMNOLOGICAL CHARACTERISTICS OF OPA RESERVOIR TRIBUTARIES IN RELATION TO PHYTOPLANKTON COMMUNITY STRUCTURE IN ITS CATCHMENT AREA, SOUTHWEST, NIGERIA - Adewumi, Emmanuel Abiodun; Adewumi, Patricia O.; Adesakin, Taiwo A.; Oyewumi, J. O.; Adedeji, A. A. (FUDMA JOURNAL OF SCIENCES, 2023)