https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Temperate southern Australian coastal waters are characterised by surprisingly high rates of nitrogen fixation and diversity of diazotrophs https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53388 Thu 23 Nov 2023 13:29:44 AEDT ]]> Biocrust morphology is linked to marked differences in microbial community composition https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36931 Mon 20 Jul 2020 10:49:41 AEST ]]> A comparative analysis of microbial DNA preparation methods for use with massive and branching coral growth forms https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42819 Mon 05 Sep 2022 11:21:26 AEST ]]> Differentiation between Impacted and Unimpacted Microbial Communities of a Nitrogen Contaminated Aquifer https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54105 Mon 05 Feb 2024 09:57:42 AEDT ]]> The Variation in Groundwater Microbial Communities in an Unconfined Aquifer Contaminated by Multiple Nitrogen Contamination Sources https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48976 Fri 21 Apr 2023 09:22:46 AEST ]]> Highly heterogeneous temporal dynamics in the abundance and diversity of the emerging pathogens <i>Arcobacter</i> at an urban beach https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39867 Arcobacter in clinical settings grows, the ecological dynamics of potentially pathogenic Arcobacter in coastal marine environments remains unclear. In this study, we monitored the temporal dynamics of Arcobacter at an urban beach subject to significant stormwater input and wet weather sewer overflows (WWSO). Weekly monitoring of bacterial communities over 24 months using 16S rRNA amplicon sequencing revealed large, intermittent peaks in the relative abundance of Arcobacter. Quantitative PCR was subsequently employed to track absolute abundance of Arcobacter 23S rRNA gene copies, revealing peaks in abundance reaching up to 108 gene copies L−1, with these increases statistically correlated with stormwater and WWSO intrusion. Notably, peaks in Arcobacter abundance were poorly correlated with enterococci plate counts, and remained elevated for one week following heavy rainfall. Using oligotyping we discriminated single nucleotide variants (SNVs) within the Arcobacter population, revealing 10 distinct clusters of SNVs that we defined as Arcobacter “ecotypes”, with each displaying distinct temporal dynamics. The most abundant ecotype during stormwater and modelled WWSO events displayed 16S rRNA sequence similarity to A. cryaerophilius, a species previously implicated in human illness. Our findings highlight the diverse environmental drivers of Arcobacter abundance within coastal settings and point to a potentially important, yet overlooked exposure risk of these potential pathogens to humans.]]> Fri 15 Jul 2022 10:37:34 AEST ]]> Bacterial and ciliate biofilm community structure at different spatial levels of a salt lake meta-community. https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42982 Fri 09 Sep 2022 13:56:36 AEST ]]>