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| Titel |
Faecal sterols as indicators of sewage contamination in estuarine sediments of the Tay Estuary, Scotland: an extended baseline survey |
| VerfasserIn |
A. D. Reeves, D. Patton |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 9, no. 1/2 ; Nr. 9, no. 1/2 (2005-06-16), S.81-94 |
| Datensatznummer |
250006591
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| Publikation (Nr.) |
 copernicus.org/hess-9-81-2005.pdf |
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| Zusammenfassung |
| Sterol ratios are used to identify sources, occurrence and partitioning of
faecal matter in sediments of the Tay Estuary, Scotland. The 5β/(5α+5β)
ratio is used to discriminate between sewage and
biogenic sterol sources by comparing the concentrations of coprostanols to
cholesterol plus coprostanols. This index shows unambiguous sewage pollution
in the Invergowrie Bay area (values >0.7). The coprostanol/epicoprostanol
index is used to differentiate between human and non-human faecal inputs.
Ratios confirmed the primary source as human-derived faecal material. The
coprostanol/cholesterol ratio was calculated in order to elucidate the
contribution of different biogenic sources to the sedimentary sterol budget.
Ratios of >1 clearly indicate faecal sterol sources. Invergowrie Bay
displayed no sterol signature other than sewage. A biogenic source of
cholesterol influenced total sterol concentrations upstream of the City of
Dundee. Attention is directed to the potential role of density fronts in
compartmentalization of faecal material in bottom sediments. |
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