https://novaprd-lb.newcastle.edu.au/vital/access/manager/Index ${session.getAttribute("locale")} 5 Tolerance of the Australian halophyte, beaded samphire, Sarcocornia quinqueflora, to Pb and Zn under glasshouse conditions: Evaluating metal uptake and partitioning, photosynthetic performance, biomass, and growth https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:55000 Wed 27 Mar 2024 16:39:23 AEDT ]]> Exposure to estrogenic mixtures results in tissue-specific alterations to the metabolome of oysters https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:48379 Saccostrea glomerata. Oysters were exposed to a “low” and a “high” mixture of (xeno) estrogens (representative of Australian and global receiving waters respectively) for 7 days and digestive gland, gill, and gonad tissue were sampled for quantification of polar metabolites by 1H NMR spectroscopy. Exposure to both mixtures lowered body mass and altered the metabolite profile in the digestive glands. Comparatively, gills, and ovaries demonstrated lesser sensitivity to the mixtures, with significant metabolomic alterations observed only for the high mixture. The male gonad did not respond to either estrogenic exposure. In the responsive tissues, major metabolites including amino acids, carbohydrates, intermediates of the tricarboxylic acid cycle and ATP were all down-regulated and exhibited tissue-specific patterns of down-regulation with the greatest proportion of metabolites down-regulated due to estrogenic exposure in the digestive gland. Exposure to (xeno) estrogen mixtures representative of concentrations reported in receiving waters in Australia and globally can impact the metabolome and associated energy metabolism, especially in the digestive gland, translating to lower pools of available ATP energy for potential cellular homeostasis, somatic maintenance and growth, reproduction and fitness.]]> Wed 15 Mar 2023 14:50:37 AEDT ]]> Characterisation of the metallothionein gene in the Sydney rock oyster and its expression upon metal exposure in oysters with different prior metal exposure histories https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:48355 Wed 15 Mar 2023 10:59:52 AEDT ]]> Estrogenic mixtures induce alterations in lipidomic profiles in the gonads of female oysters https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:47121 Wed 14 Dec 2022 12:32:24 AEDT ]]> Lead (Pb) Contamination in Agricultural Products and Human Health Risk Assessment in Bangladesh https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:50102  1); however, fruits and pulses do not pose any non-cancer health risks to Bangladeshi residents. Most of the cereals and vegetables showed a higher value than 10−6, indicating a potential cancer risk; however, fruits and pulses showed lower risk only marginally exceeding the lower allowable limit (i.e., 10−6).]]> Wed 12 Jul 2023 14:04:45 AEST ]]> Pollution status and ecological risk assessment of metal(loid)s in the sediments of the world's largest mangrove forest: A data synthesis in the Sundarbans https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:50263 Wed 12 Jul 2023 11:44:07 AEST ]]> Accumulation and distribution of metal(loid)s in the halophytic saltmarsh shrub, Austral seablite, Suaeda australis in New South Wales, Australia https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:40286 1) and lower for Pb and As (root BCFs <1). Substantial barriers for translocation from roots to stems were identified for all metal(loid)s (stem TFs; 0.07-0.68). Conversely, unrestricted flow from stems to leaves was observed for all metal(loid)s at unity or higher (leaf TFs = 1). Strong linear relationships between sediment and root for Zn and Pb were observed, indicating roots as a useful bioindicator.]]> Wed 07 Jun 2023 11:49:24 AEST ]]> Secondary treatment phase of tertiary wastewater treatment works significantly reduces estrogenic load https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:39440 Wed 07 Jun 2023 10:32:24 AEST ]]> Global patterns of accumulation and partitioning of metals in halophytic saltmarsh taxa: a phylogenetic comparative approach https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:39208 1). Further, there is significant translocation from roots to shoot for Cu, Zn and Cd (≤ 1), however, Pb is less mobile (TF = 0.65). Patterns of accumulation were similar among families, except greater Cd accumulation to roots in members of Juncaceae. Patterns of uptake to roots and translocation to leaves were broadly similar among plant type, plant form, habitat and photosynthetic mode. Zinc is lower in the leaves of salt-secreting species for some closely related taxa, suggesting some species co-excrete sodium (Na+) and Zn2+ through glands in leaf tissue. Salinity tolerance has no relationship to metal uptake and translocation. Translocation of Zn is greater at lower Zn sediment exposures, reflecting its active uptake and essentiality, but such bias does not affect outcomes of analyses when included as a covariate.]]> Wed 03 May 2023 14:02:01 AEST ]]> Lethal and sub-lethal effects of aluminium on a juvenile Penaeid shrimp https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:41927 Metapenaeus macleayi), through a series of experiments conducted under normal (pH 8) and acidic (pH 5) conditions. Experimental data were used to examine mortality. Also, histological examination of the gills and hepatopancreas was conducted to determine pathological consequences of exposure to these stressors. School Prawn did not experience mortality in response to acute exposure to Al under normal pH conditions, but mortality and tissue bioaccumulation of Al was greater under acidic conditions, suggesting an interactive effect of both stressors. Histology revealed sub-lethal effects of Al including structural abnormalities in the gills and hepatopancreas, and evidence of viral infection and immune response, particularly at lower pH and higher Al concentrations. These impacts may impede major vital functions such as respiration, osmotic regulation, metabolism and growth of juvenile School Prawn, which could contribute to productivity bottlenecks in degraded estuaries.]]> Tue 16 Aug 2022 11:19:40 AEST ]]> eDNA metabarcoding reveals shifts in sediment eukaryote communities in a metal contaminated estuary https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:50883 Tue 15 Aug 2023 10:19:15 AEST ]]> The accumulation and distribution of arsenic species and selected metals in the saltmarsh halophyte, spiny rush (Juncus acutus) https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:47030 Tue 13 Dec 2022 14:08:40 AEDT ]]> Soil washing of arsenic from mixed contaminated abandoned mine soils and fate of arsenic after washing https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:47014 Tue 13 Dec 2022 11:48:22 AEDT ]]> Towards adverse outcome pathways for metals in saltmarsh ecosystems - A review https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:43844 Tue 04 Oct 2022 11:53:44 AEDT ]]> Metal(loid) uptake and partitioning within the saltmarsh halophyte, Juncus kraussii https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:48849 Thu 20 Apr 2023 10:30:52 AEST ]]> Potential mechanisms underlying estrogen-induced expression of the molluscan estrogen receptor (ER) gene https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:29784 sgER) and the 5'-flanking region of the gene from the Sydney rock oyster Saccostrea glomerata. The sgER cDNA is predicted to encode a 477-amino acid protein that contains a DNA-binding domain (DBD) and a ligand-binding domain (LBD) typically conserved among both vertebrate and invertebrate ERs. A comparison of the sgER LBD sequence with those of other ligand-dependent ERs revealed that the sgER LBD is variable at several conserved residues known to be critical for ligand binding and receptor activation. Ligand binding assays using fluorescent-labelled E2 and purified sgER protein confirmed that sgER is devoid of estrogen binding. In silico analysis of the sgER 5'-flanking sequence indicated the presence of three putative estrogen responsive element (ERE) half-sites and several putative sites for ER-interacting transcription factors, suggesting that the sgER promoter may be autoregulated by its own gene product. sgER mRNA is ubiquitously expressed in adult oyster tissues, with the highest expression found in the ovary. Ovarian expression of sgER mRNA was significantly upregulated following in vitro and in vivo exposure to 17β-estradiol (E2). Notably, the activation of sgER expression by E2 in vitro was abolished by the specific ER antagonist ICI 182, 780. To determine whether sgER expression is epigenetically regulated, the in vivo DNA methylation status of the putative proximal promoter in ovarian tissues was assessed using bisulfite genomic sequencing. The results showed that the promoter is predominantly hypomethylated(with 0–3.3% methylcytosines) regardless of sgER mRNA levels. Overall, our investigations suggest thatthe estrogen responsiveness of sgER is regulated by a novel ligand-dependent receptor, presumably via a non-genomic pathway(s) of estrogen signalling.]]> Thu 14 Sep 2017 11:29:22 AEST ]]> Acclimatory processes are likely responsible for metal tolerance in oyster embryos https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:34680 50's of their offspring. Zn tolerance was lost after translocation. Zn EC50 values of offspring from transplanted adults bore no relation to the Zn EC50's of their location of origin. Thus the initial tolerance observed could be attributed to acclimation transferred to the F₁ generation.]]> Thu 11 Apr 2019 15:08:32 AEST ]]> Assessment of the effects of sediment-associated metals and metalloids on Mangrove macroinvertebrate assemblages https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:38384 Thu 02 Sep 2021 16:12:32 AEST ]]> Effect of the pollutants lead, zinc, hexadecane and octocosane on total growth and shell growth in the Akoya pearl oyster, Pinctada imbricata https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:11808 -1) of either zinc or lead. Exposure to the aliphatic hydrocarbons had no effect on total oyster growth. High concentrations of lead completely halted shell growth, the first demonstration of pollutant induced cessation of biomineralization in pearl oysters. Conversely, exposure to moderate levels of lead and the long-chain hydrocarbon octacosane resulted in significant increases in shell width growth. The results from this study indicate that P. imbricata is relatively tolerant of the selected pollutants and could be deployed within a remediative context in moderately polluted coastal areas.]]> Sat 24 Mar 2018 08:10:32 AEDT ]]> Response of estuarine wetlands to reinstatement of tidal flows https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:11159 0.4 above the Australian height datum (mAHD), whereas mangrove occupied areas with spring tidal range >0.3 m, hydroperiod <0.45 and elevation <0.4 mAHD. By using these parameters, it is possible to exclude mangrove from saltmarsh areas and to establish saltmarsh at lower elevations in the tidal frame than would occur under natural conditions, effectively expanding saltmarsh area. These measures can be useful where landward migration of estuarine communities is restricted by infrastructure; however, they should not be considered a substitute for conservation of remnant saltmarsh or establishment of landward buffer zones.]]> Sat 24 Mar 2018 08:08:32 AEDT ]]> Promiscuous primates engage in same-sex genital interactions https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:24672 Sat 24 Mar 2018 07:10:56 AEDT ]]> Metal(loid) accumulation in the leaves of the grey mangrove (Avicennia marina): Assessment of robust sampling requirements and potential use as a bioindicator https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:48217 Sat 11 Mar 2023 12:36:47 AEDT ]]> Upregulation of antioxidant enzymes contribute to the elevated tolerance of Juncus acutus offspring from metal contaminated environments. https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:54976 Mon 25 Mar 2024 15:21:19 AEDT ]]> Uptake and partitioning of metals in the Australian saltmarsh halophyte, samphire (Sarcocornia quinqueflora) https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:34744 Sarcocornia quinqueflora), across three contaminated estuaries in New South Wales, Australia. Average sediment concentrations ranged from 62 to 764 μg/g for Zn, 20–52 μg/g for Cu, 27–311 μg/g for Pb and 0.45–1.90 μg/g for Cd across estuaries. Lake Macquarie was the most contaminated estuary, with the Hunter River estuary and Sydney Olympic Park exhibiting intermediate levels of sediment metal contamination. Bioconcentration factors for metal uptake from sediment to roots were ≥ 1 (except for Cu). Translocation within the plant was low for most metals, with apparent barriers to transport identified at the root: non-photosynthetic stem interface for Zn, Cu, Pb and Cd, and at the non-photosynthetic stem: photosynthetic stem transition for Pb and Cd. All metals accumulated in roots with increasing sediment exposure, and lower soil organic matter predicted greater Pb and Cu uptake to roots. Further, increases in sediment pH predicted greater Cd root accumulation. However, transport was regulated to the non-photosynthetic stem for Zn, and to the PS stem for Zn and Pb. In terms of employing S. quinqueflora as a bioindicator, all root metals, and Pb and Cd in non-photosynthetic stem tissue exhibited relationships with sediment metal loads, though high variability made their predictive ability limited.]]> Mon 15 May 2023 11:31:26 AEST ]]> Benthic infaunal assemblages adjacent to an ocean outfall in Australian marine waters: Impact assessment and identification of indicator taxa https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:46223 Mon 14 Nov 2022 12:11:57 AEDT ]]> Uptake and distribution of metal(loid)s in two rare species of saltmarsh, blackseed samphire, Tecticornia pergranulata, and narrow-leafed wilsonia, Wilsonia backhousei, in New South Wales, Australia https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:54729 Mon 11 Mar 2024 14:11:20 AEDT ]]> Investigating responses to control: a comparison of common myna behaviour across areas of high and low trapping pressure https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:45512 Mon 07 Nov 2022 11:08:00 AEDT ]]> Offspring of metal contaminated saltmarsh (Juncus acutus) exhibit tolerance to the essential metal Zn but not the nonessential metal Pb https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:50761 Mon 07 Aug 2023 14:08:10 AEST ]]> The potential of saltmarsh halophytes for phytoremediation of metals and persistent organic pollutants: An Australian perspective https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:53003 Mon 06 Nov 2023 08:45:15 AEDT ]]> The constitutively active estrogen receptor (ER) binds and activates the promoter of the vitellogenin (Vtg) gene in the Sydney rock oyster, Saccostrea glomerata https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:34582 Fri 29 Mar 2019 11:40:28 AEDT ]]> Parental exposure to the synthetic estrogen 17a-ethinylestradiol (EE2) affects offspring development in the Sydney rock oyster, Saccostrea glomerata https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:43556 Fri 23 Sep 2022 10:33:22 AEST ]]> Baseline analysis of metal(loid)s on microplastics collected from the Australian shoreline using citizen science https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:41085 Fri 22 Jul 2022 17:11:23 AEST ]]> Assessment of the bioaccumulation of metals to chicken eggs from residential backyards https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:28292 Fri 22 Apr 2022 10:20:06 AEST ]]> Legacy metal contamination is reflected in the fish gut microbiome in an urbanised estuary https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:52681 Fri 20 Oct 2023 09:30:49 AEDT ]]> Accumulation and partitioning of metals and metalloids in the halophytic saltmarsh grass, saltwater couch, <i>Sporobolus virginicus</i> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:44521 Sporobolus virginicus, across three urbanised estuaries in NSW Australia. Lake Macquarie was the most contaminated estuary, while Sydney Olympic Park, Port Jackson exhibited intermediate metal(loid) loadings and Hunter Wetlands exhibited the lowest loadings among estuaries. Essential metals (Zn and Cu) were more mobile, with sediment:root bioconcentration factors (BCFs) greater than unity and translocation among plant organs greater than, or equal to, unity. Other metal(loid)s were less mobile, with BCFs equal to unity and translocation factors among organs much reduced. Despite these barriers to translocation, all metal(loid)s were accumulated to roots with dose, and further accumulative relationships between metal(loid)s in roots and culms, and culms and leaves, were evidenced (with the exception of Cu). Along with sediment metal(loid)s, increases in sediment pH predicted Cu uptake in roots and increases in soil organic matter predicted Se uptake in roots. Although significant positive linear relationships were observed between sediment metal(loid)s and plant organ metal(loid)s(withholding Cu), the variance explained was low to intermediate for most metal(loid)s suggesting employing S. virginicus as an accumulative bioindicator would be impractical.]]> Fri 14 Oct 2022 11:18:58 AEDT ]]> The utility of vitellogenin as a biomarker of estrogenic endocrine disrupting chemicals in molluscs https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:34757 Fri 05 May 2023 15:48:50 AEST ]]>