Contaminant pathways in Port Curtis: Final report - OzCoasts

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Contaminant pathways in Port Curtis: Final report5: Metal bioaccumulation in food web5.2 ExperimentalFull sample collection details may be found in the report by Andersen et al. (2005).Three sites: Boat Creek (Site 1), Graham Creek (Site 2) and Black Swan (Site 3)were selected along a north-west transect towards The Narrows, representingincreasing distances from likely sources of anthropogenic inputs (Figure 5.1).Yellow Patch (Site 4, see Figure 5.1), an unimpacted oceanic reference site on theeastern side of Curtis Island, was selected for comparison. A list of organismscollected is given in Table 5.1 and photographs of selected specimens collectedshown in Figure 5.2. The majority of samples were collected from April to June2001 except for seston and mangrove snails at Site 4 and mullet at Site 2, whichwere collected in October 2002. Samples of epiphytic and filamentous algae andprawns and repeated samples of macroalgae and particulate organic matter(POM) were collected in June 2004. Typically, five replicates of each sample typewere taken at each site. Mud crab samples for isotopic analysis were taken fromall four sites. For the remaining organism types, isotopic analyses were carried outon samples predominantly from Site 2. Metals analysis was carried out onsamples collected at all four sites.Site 4 – Yellow PatchCurtis IslandSite 3 – Black SwanSite 2 –GrahamCreekSite 1 - Boat CreekGladstone0-10 KilometresFigure 5.1. Location of organism sampling sites in Port Curtis: Site 1 – Boat Creek,Site 2 – Graham Creek and Site 3 – Black Swan, and reference site outsideof Port Curtis: Site 4 – Yellow Patch. Shaded areas indicate mangrove zones55
Contaminant pathways in Port Curtis: Final report5: Metal bioaccumulation in food webSamples were analysed for eight different metals (aluminium, arsenic, cadmium,chromium, copper, nickel, selenium and zinc) at NMI Sydney and reported on awet weight basis. Stable isotope determinations (carbon and nitrogen) werecarried out by CSIRO Marine Laboratories, Hobart. The combined datasets werethen interpreted using a variety of statistical tests. Further details may be found inthe report by Andersen et al. (2005).Table 5.1. Organisms collected for the foodweb studyOrganismMud crab (Scylla serrata)Fiddler crab (Uca coarctata)Metopograpsus (Metopograpsus frontalis)Banana prawn (Penaeus merguiensis)Mullet (Mugil cephalus)Mud whelk (Telescopium telescopium)Mangrove snail (Nerita balteata)Oyster (Saccostrea glomerata)Mangrove leaves (Rhizophera stylosa)Seagrass (Zostera capricorni)Macroalgae (Catenella nipae)Filamentous algae (predominantly Lyngbyamajuscula)Seston (zooplankton and phytoplankton)Epiphytic algaeParticulate organic matter (POM)56
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Contaminant pathways in Port Curtis: Final report - OzCoasts

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