Sani, F. R. and Ibrahim, S. 2024. Seasonal Assessment of Physico- Chemical Parameters, Phytoplanktons Composition and Abundance in Ajiwa Reservoir, Katsina State, Nigeria. UMYU Journal of Microbiology Research (UJMR). 9, 3 (Jun. 2024), 146–153. DOI:https://doi.org/10.47430/ujmr.2493.017.