Skip to main content

Protozoan communities and contamination of several fluvial systems

Buy Article:

$30.00 plus tax (Refund Policy)

Abstract:

Eleven stations in six rivers in the Comunidad Autonoma de Madrid (Spain) were studied during February 1993 to describe the protozoan communities and analyze the presence of lead and cadmium. The most polluted areas were Fuente del Fresno (Jarama River), where the levels of dissolved heavy metals were 10 μg/L of cadmium and 1 140 μg/L of lead acid, Torrej6n de Ardoz (Henares River) where there was 15 μg cadmium and 1 140 μg/L of lead. These two areas showed the greatest amount of industrial effluents, and the protozoan response expressed itself by the presence of resistant species such Euglena gracilis; density and biomass were not affected, although there were changes in the trophic structure, with a predominance of bacterivore and nonselective protozoans. The effects of the heavy metals were masked by the organic pollution. In the stations in well-oxygenated waters, there was a predominance of photoautotrophs and diatoms. In all zones a significant correlation between the density of bacteria and protozoans was observed. The trophic structure of the protozoan communities in the different water courses was influenced by the amount of food available and by organic pollution.

Keywords: INDUSTRIAL WASTE; METALS; PROTOZOA; SURFACE WATER

Document Type: Research Article

DOI: https://doi.org/10.2175/106143096X127758

Publication date: 1996-05-01

More about this publication?
  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • WEF Bookstore
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more