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Water Quality in Kinnego Bay, Lough Neagh, Demonstrated by Protozoan Communities Colonising Polyurethane Foam Artificial Substrate

Xu Muqi and Brian Wood
Biology and Environment: Proceedings of the Royal Irish Academy
Vol. 94B, No. 2 (Oct., 1994), pp. 195-203
Published by: Royal Irish Academy
Stable URL: http://www.jstor.org/stable/20499929
Page Count: 9
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Water Quality in Kinnego Bay, Lough Neagh, Demonstrated by Protozoan Communities Colonising Polyurethane Foam Artificial Substrate
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Abstract

Water quality in Kinnego Bay was assessed by a study of the protozoan communities colonising an artificial substrate, polyurethane foam (PF). Protozoan communities were sampled on 1, 3, 6, 9 and 14 days after exposure of cubes of foam in the lough during August 1992. Four study stations--three in Kinnego Bay, one in the open lake at Traad Point as a control station--were distinguishable in terms of differences in the community's structural (species richness) and functional parameters (protozoan colonisation rate on PF). The concentrations of PO₄, NO₃, NH₃, BOD₅ and COD as chemical indicators of pollution at the four sampling stations were also analysed. An inverse relationship was found between these indicators of pollution and the colonisation rate of the protozoan communities. The number of protozoan species colonising PF after exposure of 1 to 3 days was found to give a clear comparative indication of the water quality at the four stations. The results of this research provide further evidence that protozoan communities may be used effectively in the assessment of water pollution and that the PF method offers the advantages of a rapid, accurate and economic method of biological monitoring, compared with other routine biological monitoring.

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