Ecological Impact Assessment and Limnological Characterization in the Intertidal Region of Calabar River Using Benthic Macroinvertebrates as Bioindicator Organisms

Abstract

A study on ecological impact assessment and limnological characterization of Calabar River using benthic macroinvertebrates as bioindicators organisms was conducted from August, 2012 to January, 2013. Surface water and benthic samples were collected from two different stations along the intertidal region of the river. The mean value of surface water temperature was 28.0±0.71 °C; pH, 8.20±0.35; dissolved oxygen, 4.30±0.4 mg/L; biochemical oxygen demand, 2.30±0.26 mg/L; conductivity, 281.8±89.5 mg/L; There were significant differences (p