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A new approach for detecting and mapping sewage impacts
Journal article   Peer reviewed

A new approach for detecting and mapping sewage impacts

S.D. Costanzo, M.J. O’Donohue, W.C. Dennison, N.R. Loneragan and M. Thomas
Marine Pollution Bulletin, Vol.42(2), pp.149-156
2001
DOI: https://doi.org/10.1016/S0025-326X(00)00125-9
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Abstract

Increased nitrogen loading has been implicated in eutrophication occurrences worldwide. Much of this loading is attributable to the growing human population along the world's coastlines. A significant component of this nitrogen input is from sewage effluent, and delineation of the distribution and biological impact of sewage-derived nitrogen is becoming increasingly important. Here, we show a technique that identifies the source, extent and fate of biologically available sewage nitrogen in coastal marine ecosystems. This method is based on the uptake of sewage nitrogen by marine plants and subsequent analysis of the sewage signature (elevated δ 15N) in plant tissues. Spatial analysis is used to create maps of δ 15N and establish coefficient of variation estimates of the mapped values. We show elevated δ 15N levels in marine plants near sewage outfalls in Moreton Bay, Australia, a semi-enclosed bay receiving multiple sewage inputs. These maps of sewage nitrogen distribution are being used to direct nutrient reduction strategies in the region and will assist in monitoring the effectiveness of environmental protection measures.

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Collaboration types
Domestic collaboration
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8 Earth Sciences
8.93 Archaeology
8.93.1193 Stable Isotopes
Web Of Science research areas
Environmental Sciences
Marine & Freshwater Biology
ESI research areas
Environment/Ecology
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