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ABSTRACT
A comparative study between the Erosional and Bank root Macro invertebrate and physiochemical condition of Ikpoba River, Edo State, Nigeria, were studied from April to August 2023. Four sampling stations were selected along the course of the river. Macroinvertebrates were sampled using the improved kick sampling techniques. The derived results from the sampling stations showed that air temperature ranged between (26-320C), Flow rate (6.14-43.48 cm/s), Dissolved Oxygen (3.0-5.8mg/l), Biochemical Oxygen Demand (0.5-3.2mg/l), Conductivity (34-685 μ/cm), Turbidity (0.5-3.3 NTU), pH (4.6-6.4). Macroinvertebrates were significantly more (P<0.05) in station 4 than in station 1, 2 and 3. There was a total of 15 taxa and 220 individuals were present in the Bank root and Erosional Samples combined. The abundance according to the Orders revealed that Arthropods, were the most common groups encountered with a total of 11 taxax in the erosional and Bank root macrobenthic samples, followed by the Mollusca with a total of 2 taxa, then Annelida and Nematoda as the least dominant taxa recording 1 taxa each. The bank root samples contained a total of 93 individuals with less diversity, while The Erosional samples contained 127 individuals with more diversity. This study suggests that Erosional Macroinvertebrates diversity and abundance is greater and more diverse than Bank root Macroinvertebrate.
