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Abundance and diversity of planktonic rotifers in the Po River

  • I. Ferrari
  • A. Farabegoli
  • R. Mazzoni
Conference paper
Part of the Developments in Hydrobiology book series (DIHY, volume 52)

Abstract

Zooplankton samples from the middle reach of the Po River were collected daily from 27 July to 24 August 1988 from a station located near Viadana. Changes in the biocoenosis structure were analyzed in relation to variations in flow rate. Rotifers accounted for more than 99% of the total zooplankton (protozoans excluded) in every sample. The dominant species were Brachionus calyciflorus, Brachionus bennini, Brachionus budapestinensis and Epiphanes macrourus. Under scanty flow conditions, the taxocoenosis showed marked stability. An increase in flow rate acts as a disturbance factor leading to a significant decrease in both total density and dominance.

Key words

Po River zooplankton rotifers diversity 

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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • I. Ferrari
    • 1
  • A. Farabegoli
    • 1
  • R. Mazzoni
    • 2
  1. 1.Istituto di Zoologia, UniversitàFerraraItaly
  2. 2.Istituto di Ecologia, UniversitàParmaItaly

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