Development of an artificial "living" sediment to study the effects of metal contamination in Antarctic marine ecosystems.Entry ID: ASAC_2946
Abstract: Metadata record for data from ASAC Project 2946.
Shallow nearshore marine habitats are rare in the Antarctic but human activities have led to their contamination. Preliminary studies suggest the characteristics of Antarctica nearshore sediments are different to elsewhere and that contaminant partitioning and absorption, and hence bioavailability, will also be very different. ... Predictive exposure-dose-response (effects) models need to be established to provide the theoretical basis for the development of sediment quality guidelines to guide remediation activities. Such a model will be possible through the development of an artificial 'living' sediment, which can be used to understand physical and chemical properties that control partitioning and absorption of contaminants.
Taken from the 2009-2010 Progress Report:
1. Collate and review existing knowledge on sediment properties in nearshore marine sediments in Antarctica to determine their physical, chemical and microbiological properties and identify gaps in our knowledge of sediment characteristics
2. Construct a range of artificial sterile sediments taking into account characteristics of naturally occurring nearshore sediments in the Antarctic. Examine physical and chemical properties of these sediments and understand the properties that control partitioning of contaminants by manipulation of bulk sediment composition and measuring the adsorption isotherms of important metal contaminants (Cu, Cd, Pb, As, Sn, Sb) in these artificial sediments
3. Produce 'living' sediments by inoculation of sterile sediments with Antarctic bacteria and diatoms that will support natural microbial communities. Examine physical and chemical properties of these sediments and understand the properties that control the partitioning and absorption of contaminants by manipulation of the bulk sediment composition and spiking metal contaminants into these artificial sediments.
Progress against objectives:
Using published literature the approximate composition of Antarctic sediments was determined. Representative sediment phases were collected form a uncontaminated environment, the chemical composition measured and absorption capacities of Cd and Pb established.
The download file contains several excel spreadsheets. Some information about them is provided below:
My =ref is reference in thesis
EN =is endnote reference
Nearby station = is closest known reference point to where samples collected
TOC = total organic carbon
TOM = Total organic matter
BPC =biogenic particulate carbon
TN = total nitrogen
TP = Total phosphorus
BSi = biogenic silica
Ci = initial aqueous phase concentration
qe = solid phase equilibrium concentration
Start Date: 2007-09-30Stop Date: 2012-03-31
ISO Topic Category
Quality Values provided in temporal and spatial coverage are approximate only.
Access Constraints These data are not yet publicly available.
A copy of a pdf document providing more information about the project is also available for download at the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_2946 when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 61 kb
Distribution Format: pdf
Distribution Media: HTTP
Distribution Size: 401 kb
Distribution Format: Excel
Role: TECHNICAL CONTACT
Phone: +61 2 6201 2531
Email: Bill.maher at canberra.edu.au
University of Canberra
Province or State: ACT
Postal Code: 2601
Role: DIF AUTHOR
Phone: +61 3 6221 5038 (international)
Phone: (03) 6221 5038 (within Australia)
Fax: +61 3 6221 5050 (international)
Fax: (03) 6221 5050 (within Australia)
Email: Alicja.Mosbauer at oceans.gov.au
National Oceans Office GPO Box 2139
Province or State: Tasmania
Postal Code: 7000
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2008-02-19
Last DIF Revision Date: 2014-08-29