Impact of Livestock Grazing on Abundance and Community Structure of Macroinvertebrate fauna of Ovia River, Edo State, Nigeria

摘要

A survey of the impact of cattle grazing on macro invertebrate fauna of OviaRiver was carried out between January and June 2004. Macro invertebrate and water sampleswere collected from three sampling locations; station I (new grazing area for cattle), station II(initial grazing area) and station III (control location). A total of 33 taxa of macro invertebrateswith 831 individuals were encountered in the study. The overall abundance of macroinvertebrates was highly significantly different (p