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Hydrobiologia

, Volume 48, Issue 3, pp 257–261 | Cite as

Intervention des populations de plumatella fungosa (Pallas) (Bryozoaire phylactoleme) dans l'autoepuration des eaux d'un etang et d'un ruisseau

  • Pierre Job
Article

Abstract

A very dense population of Plumatella fungosa (Pall.) (Bryozoa Phylactolema) has been observed in a pond and its outlet, polluted by organic matter from sewers.

These organisms play an prominent part in the process of water purification; they can absorb annually an average quantity of 113 kg Nitrogen/ha in the zones where the biomass of the colonies reaches 15,6 T/ha.

There is moreover an obvious relation between the evolution of the biological quality of water, classified according to the Kolkwitz-Marsson system, and the localization and density of the Bryozoa populations. The greatest development was observed between the alfa mesosaprobic and beta mesosaprobic zone.

Keywords

Bryozow Plumatella sewage purification nitrogen absorption 

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Bibliographie

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Copyright information

© Dr. W. Junk b.v. Publishers 1976

Authors and Affiliations

  • Pierre Job
    • 1
  1. 1.Laboratoire de Morphologie, Systématique et Ecologie animales, Institut Ed. Van BenedenUniversité de LiègeLiégeUK

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