Contaminant pathways in Port Curtis: Final report - OzCoasts

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Contaminant pathways in Port Curtis: Final reportAppendix: Specific project outputsAngel, B.A., Simpson, S.L., Stauber, J.L., Jolley, D.F. (2005) ‘The effects ofcontinuous and fluctuating copper exposures on the marine algaPhaeodactylum tricornutum’. Conference Proceeding, International conferenceon the biogeochemistry of trace elements (ICOBTE), April 3–7, Adelaide,South Australia.Andersen, L.E., Siu, W.H.L., Ching, E.W.K., Kwok, C.T., Melville, F., Plummer, C.,Storey, A.W. and Lam, P.K.S. (2005) ‘Antioxidant enzymes as biomarkers ofenvironmental stress in oysters in Port Curtis’. Conference presentation,Research for Coastal Management, CRC Coastal Zone, 14 September,Coolangatta, Queensland.Andersen, L.E. (2004)’ Imposex in the City: A survey to monitor the effects of TBTcontamination in Port Curtis, Queensland’. Conference presentation, CRCCoastal Zone, 16 September, Coolangatta, Queensland.Fabbro L.F. and Andersen, L.E. (2004) ‘Toxins and contaminants causingenvironmental harm? - Bioaccumulation and identification of biological effects’.Faculty of Arts health and Sciences 2005 Lecture Series, Central QueenslandUniversity, Rockhampton.All team members presented talks at the CRC-organised one-day seminar on‘Contaminants in Port Curtis’, Gladstone, 2005.Dissemination of information through local mediaA phone interview was held with a reporter from ABC Science/News on19 October 2004 and an article appeared on their website.Radio interview ABC Capricornia fishing segment re: oysters as biomonitors.A phone interview was held with a reporter from The Veterinarian magazine on9 November 2004.The following press release was issued following a one-day ContaminantPathways workshop in Gladstone in July 2005. It was published in CQU Newsand local newspapers:Harbour Gets Second Clean Bill of HealthA second phase of research in Port Curtis recently conducted by theCoastal Cooperative Research Centre has determined that the harbourstill remains relatively healthy. A recent presentation of results to industry,managers and stakeholders by the combined team from CSIRO andCentral Queensland University indicated positive findings on the health oflocal waterways. Extensive surveys of the port included measuringcontaminants in water, sediments and marine organisms and examiningthe health effects of these contaminants on marine life. Althoughconcentrations of some dissolved metals were elevated in harbour water,they were not above levels of regulatory concern and returned to natural119
Contaminant pathways in Port Curtis: Final reportAppendix: Specific project outputsbackground levels in coastal waters. Metal concentrations were higher inThe Narrows and this may be associated with natural inputs frommangrove areas. A new hydrodynamic model being tested in the harbourdetermined that water flushing times are probably longer than previouslythought; around 19–24 days. Metal concentrations were high in a range ofplants and animals living within the port compared to those from a coastalreference area and this may be due to the high retention time of water(and therefore available contaminants) in the harbour. New tools wereused to assess the health of organisms exposed to contaminants in theharbour. These included the use of biochemical markers such as stressenzymes in oysters and imposex (growth of male genitalia in females) insnails. In addition, laboratory studies explored the different responses oforganisms to periodic or continuous exposure to discharged contaminants.Sediments were found to contain much lower levels of naphthalene (apotentially harmful polycyclic aromatic hydrocarbon or PAH) thanpreviously thought. PAHs are derived from a number of sources includingoil shale and coal, but levels across the harbour were well belowguidelines. Sediment cores also indicated that there have been no majorcontaminant inputs in recent history. The pathway of contaminants upthrough the aquatic food chain was determined to be complex andscientists are still unravelling the story.Two articles were published in the Gladstone Observer on: (i) the oysterbioaccumulation/biomarker studies (Figure A.1) and (ii) collaborations with Griffithand City (Hong Kong) Universities.Figure A.1. Example of a contaminant pathways article published in the GladstoneObserver, 2005120
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Contaminant pathways in Port Curtis: Final report - OzCoasts

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