Zooplankton distribution along small river profile under high anthropogenic load (on the example of Tsivil river, Middle Volga region)

The zooplankton composition, structure and abundance modifications along the Tsivil river profile were analyzed. The zooplankton distribution along the Tsivil river profile just partially conforms to the river continuum concept and can be more equally interpreted by the patch dynamics concept. The probable reason for it is the presence of intensive anthropogenic load (mainly agricultural), leading to water eutrophication.