A5004246623- Phytoplasmas and Hemiptera pathogens
- Heavy metals in environment
- Environmental Toxicology and Ecotoxicology
- Microbial Community Ecology and Physiology
- Cocoa and Sweet Potato Agronomy
- Plant Pathogenic Bacteria Studies
- Geochemistry and Geologic Mapping
- Marine Biology and Ecology Research
- Plant Pathogens and Fungal Diseases
- Radioactivity and Radon Measurements
- Radioactive element chemistry and processing
- Coastal wetland ecosystem dynamics
- Marine Biology and Environmental Chemistry
- Marine and fisheries research
- Metal Extraction and Bioleaching
- Methane Hydrates and Related Phenomena
- Environmental and Social Impact Assessments
- Insect symbiosis and bacterial influences
- Mine drainage and remediation techniques
- Pharmaceutical and Antibiotic Environmental Impacts
- Biocrusts and Microbial Ecology
- Chromium effects and bioremediation
- Microbial Fuel Cells and Bioremediation
- Water Quality Monitoring and Analysis
- Aquatic Invertebrate Ecology and Behavior
Australian Institute of Marine Science
2012-2020
Charles Darwin University
2005-2018
Government of the Northern Territory
2004
Hypolithic microbes, primarily cyanobacteria, inhabit the highly specialized microhabitats under translucent rocks in extreme environments. Here we report findings from hypolithic cyanobacteria found three types of (quartz, prehnite, agate) a semiarid region tropical Australia. We investigated photosynthetic responses cyanobacterial communities to light, temperature and moisture laboratory, measured microclimatic variables soil field over an annual cycle. also used molecular techniques...
Spartium witches'-broom (SpaWB), buckthorn (BWB) and allocasuarina yellows (AlloY) are diseases of junceum (Spanish broom), Rhamnus catharticus (buckthorn) Allocasuarina muelleriana (Slaty she-oak), respectively. These associated with distinct phytoplasmas. The SpaWB, BWB AlloY phytoplasmas share <97.5 % 16S rDNA sequence similarity each other known phytoplasmas, including the closely related apple proliferation group. Also, have a different natural plant host. Based on their unique...
Abstract There is a shortage of established chronic toxicity test methods for assessing the contaminants to tropical marine organisms. The authors tested suitability microalga Isochrysis galbana use in routine ecotoxicology and assessed effects 72‐h exposures copper (Cu, reference toxicant), aluminium (Al), gallium (Ga), molybdenum (Mo), key metals alumina refinery discharge, on growth I. at 3 temperatures: 24 °C, 28 31 °C. sensitivity both method was validated by response Cu exposure, with...
Coastal sediments accumulate metals from anthropogenic sources and as a consequence industry is required to monitor sediment health. The total concentration of metal does not necessarily reflect its potential toxicity or biological impact, so assessment tools are useful for monitoring. Rapid sensitive enough detect relatively small increases in concentrations would provide early warning future ecosystem impact. authors investigated situ populations Archaea Bacteria rapid at 4 northern...
This study examined whether genes that are less conserved than the 16S rRNA gene can distinguish Candidatus Phytoplasma australiense strains identical based on their genes, with a view to providing insight into origins and distribution, any patterns of association particular plant hosts. Sequence analysis tuf rp operon showed Ca . P. could be differentiated four subgroups, named 16SrXII‐B ( ‐Australia I; ‐A), ‐New Zealand ‐B), II) ‐C). Strawberry lethal yellows 1, strawberry green petal,...
Chronic toxicity test methods for assessing the of contaminants to tropical marine organisms are generally lacking. A 96-h chronic growth rate was developed larval stage dogwhelk, Nassarius dorsatus. Growth rates N. dorsatus larvae were assessed following exposures copper (Cu), aluminium (Al), gallium (Ga), and molybdenum (Mo). Exposure Cu at 28 °C validated sensitivity method, with 10% (EC10) 50% (EC50) effect concentrations 4.2 μg/L 7.3 Cu, respectively. The EC10 EC50 values Al (<0.45-μm...
Abstract Metal impacted, anoxic sediments from five sites at a coastal location in the wet/dry tropics of Australia were sampled during both wet and dry seasons. concentrations total sediment porewater, potentially bioavailable bioaccessible fractions, measured. Pyrosequencing was used to sequence bacterial DNA extracted sediment, data generate community profiles each sample site. Changes populations between reflected changes 7 metals/metalloids (Al, V, Mo, Ga, Zn, Cd, As), best correlated...
Bacterial communities in floodplain and wetland soils cycle elements essential for flora fauna. The coastal habitats of northern Australia are threatened with increasing saltwater intrusion (SWI) events that will destroy freshwater habitats. effect the impending SWI on bacterial is unknown. Here, we examined a tropical river located World Heritage Kakadu National Park. Using 16S rRNA gene pyrosequencing, measured baseline from three morphologically distinct regions (lower, upper backwater...