| Use of sediment risk and ecological/conservation value for strategic management of estuarine environments: Sydney estuary, Australia. | |
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MedLine Citation:
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PMID: 19705195 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Sediment mantling the floor of Sydney estuary contains a wide range of chemicals at highly elevated concentrations over extensive areas. Appropriate sediment management decisions are urgently required to prevent further degradation of sediment quality and to minimize resulting adverse ecological effects. The objective of the present work was to provide a systematic, estuary-wide assessment of sediment risk and ecological/conservation value throughout the harbor to guide sediment management decisions. Sediment risk is the likelihood of sediment chemistry causing adverse biological effects to bottom-dwelling animals and was conducted using national sediment quality guidelines (SQGs) for single contaminants and the mean SQG quotient approach to assess chemical mixtures. Sediment risk was negligible at the mouth of the estuary, but increased strongly landwards. The ecological/conservation value assessment was conducted to identify sites that warrant different levels of protection and was conducted using the value of ecological communities and priority waterway use. Consideration of these two parameters combined enabled the estuary to be prioritized for management attention. The prioritization and identification of appropriate management strategies were determined through the use of management matrices also based on sediment risk and ecological/conservation value. A computer package is being developed to provide managers with information on sediment risk, ecological/conservation value, the urgency and the type of management intervention required for any location in Sydney estuary, in real-time. This approach to estuarine management is unique and will greatly improve effective management of Sydney estuary, and other harbors in urgent need of management action and protection. |
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Authors:
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Gavin F Birch; Philip Hutson |
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Publication Detail:
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Type: Journal Article Date: 2009-08-25 |
Journal Detail:
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Title: Environmental management Volume: 44 ISSN: 1432-1009 ISO Abbreviation: Environ Manage Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-10-05 Completed Date: 2009-11-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7703893 Medline TA: Environ Manage Country: United States |
Other Details:
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Languages: eng Pagination: 836-50 Citation Subset: IM |
Affiliation:
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Sydney University, NSW, Australia. gavin@geosci.usyd.edu.au |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Conservation of Natural Resources* Decision Making Ecosystem Geologic Sediments / chemistry* New South Wales Risk Assessment |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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