Comparative reservoirs and rivers zooplankton fauna diversity assessment on the dependence of nature factors

The present paper is devoted to the resumptive study of the plankton Rotifera and Crustacea fauna diversity in water bodies which belong to the different landscape regions on the territory of forest and forest-steppe zones (Middle Volga Region, the Chuvash Republic). The regions were assigned basing on the catching basin localization and landscape characteristics. The Shannon diversity indexes mean value was assumed for lakes, ponds (artificial lakes) and small rivers separately for each region. The highest diversity indexes levels were revealed for lakes and ponds zooplankton communities on steppe landscapes. The less diverse fauna is observed in lakes situated on forest-steppe and forest territories. The poorest river communities are typical for mixed-woods dominated region. The strong negative dependence of lakes, ponds, rivers zooplankton community diverse on territory forestration and anthropogenic load was revealed. The positive correlation of diversity and landscape stability was exposed either.