Ejiowhor, I. et al. 2018. Phytoplankton and epipelic algal abundance in relation to bridge construction on Okpoka River in the Upper Bonny Estuary, Nigeria. Archives of Agriculture and Environmental Science. 3, 4 (Dec. 2018), 337–343. DOI:https://doi.org/10.26832/24566632.2018.030402.