The Ecology of Sewage Treatment Gradients in Relation to their Use by waterbirds

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Abstract

The distribution and abundance of waterbirds along sewage treatment gradients at the Western Treatment Plant (Victoria, Australia) were studied in late summer/early autumn 2000. In general, the highest densities and diversity of waterbirds, and of zooplankton, were found in the ponds towards the end of a treatment series. Filter-feeding waterfowl (Anatidae) probably used these ponds because of the availability of zooplankton as a food-source. Dissolved oxygen concentration generally increased along the treatment gradient and un-ionised sulphide concentration decreased, and it is possible that either one, or both, of these played a key role in determining the distribution of zooplankton.
Original languageEnglish
Pages (from-to)91-108
Number of pages18
JournalHydrobiologia
Volume534
Issue number1-3
DOIs
Publication statusPublished - 2005

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