A5014165540- Aquatic Ecosystems and Phytoplankton Dynamics
- Geology and Paleoclimatology Research
- Fish Ecology and Management Studies
- Marine and coastal ecosystems
- Freshwater macroinvertebrate diversity and ecology
- Diatoms and Algae Research
- Microbial Community Ecology and Physiology
- Aquatic Invertebrate Ecology and Behavior
- Biocrusts and Microbial Ecology
- Marine Toxins and Detection Methods
- Isotope Analysis in Ecology
- Fish Biology and Ecology Studies
- Plant Water Relations and Carbon Dynamics
- Hydrology and Sediment Transport Processes
- Fish biology, ecology, and behavior
- Coastal wetland ecosystem dynamics
- Algal biology and biofuel production
- Geological formations and processes
- Water Quality and Pollution Assessment
- Fire effects on ecosystems
- Tree-ring climate responses
- Hydrology and Watershed Management Studies
- Aquaculture Nutrition and Growth
- Groundwater and Isotope Geochemistry
- Polar Research and Ecology
Queensland Department of Environment and Science
2014-2024
The University of Queensland
2006-2024
Queensland Government
2019-2022
Intermittently flowing streams and rivers should be recognized, afforded protection, better managed.
Abstract The La Niña and El Niño phases of the Niño-Southern Oscillation (ENSO) have major impacts on regional rainfall patterns around globe, with substantial environmental, societal economic implications. Long-term perspectives ENSO behaviour, under changing background conditions, are essential to anticipating how may respond future climate scenarios. Here, we derive a 7700-year, quantitative precipitation record using carbon isotope ratios from single species leaf preserved in lake...
Abstract Since October 1997, 47 reservoirs and weir pools across tropical subtropical Queensland have been regularly monitored for the occurrence of planktic cyanoprokaryotes. Cylindrospermopsis raciborskii (Woloszynska) Seenaya & Subba Raju (Nostocales, Cyanoprokaryota) was found in 70% storages, with one storage displaying year‐round dominance, 50% seasonally dominated a seasonal presence 46% pools. Maxima majority storages occurred from late summer through to early autumn. The precise...
Three populations of the freshwater filamentous cyanobacterium Lyngbya wollei (Farlow ex Gomont) Speziale and Dyck have been putatively identified from north-eastern Australia found to produce potent cyanotoxin cylindrospermopsin (CYN) its analog deoxy-cylindrospermopsin (deoxy-CYN). We investigated phylogeny toxicology strains mats isolated two these using a combination molecular morphological techniques. Morphologically corresponded type description, however, frequency false-branching was...
Phenotypic plasticity in the cyanobacteria provides adaptive strategies to cope with changes prevailing environmental conditions. Plasticity may manifest morphological, physiological, or behavioural responses. Determining if variable phenotypes are truly novel expressions evolved via genetic change, rather than intrinsic characteristics within spectrum of intraspecific diversity has rarely been studied. Poorly characterised unrecognised variability is as problematic cryptic terms imposing...
Longitudinal and lateral connectivity is important for mobile aquatic species in rivers reproductive migrations, recruitment, gene flow access to food resources across habitat types. Water resource developments such as dams levees may disrupt these connections, causing river fragmentation loss of highly productive habitats floodplain wetlands. We used sulfur stable isotopes a tracer estimate patterns fish movement an unregulated tropical northern Australia, taking advantage observed spatial...
Cyanobacterial composition of microbial mats from an alkaline thermal spring issuing at 43-71 degrees C tropical north-eastern Australia are described using a polyphasic approach. Eight genera and 10 species three cyanobacterial orders were identified based on morphological characters. These represented taxa previously known as thermophilic other continents. Ultrastructural analysis the tower revealed two filamentous morphotypes contributed majority biomass. Both types had ultrastructural...
Summary Human‐induced environmental change threatens freshwater ecosystems, and knowing how these systems have responded to past variability can inform management decisions. Palaeoenvironmental reconstructions provide insight, although their low temporal resolution may mask short‐term responses. Hence, a combination of short‐term, high‐resolution contemporary data long‐term, low‐resolution palaeoenvironmental offer greater understanding system behaviour. We demonstrate this approach by...
Cyanobacterial blooms represent one of the most conspicuous and widespread waterborne microbial hazards to human ecosystem health. Investigation a cyanobacterial bloom in shallow brackish water recreational cable ski lake south-eastern Queensland, Australia revealed dominance toxigenic species Nodularia spumigena. The spanned three months, during which time cell concentrations exceeded guideline thresholds for risk, hepatotoxic cyanotoxin nodularin 200 µg L(-1). Cyanotoxin origin...
Large benthic accumulations of cyanobacteria occur in sheltered embayments within Myall Lake, New South Wales, Australia. The lake is shallow, with the entire bottom euphotic zone, and it generally considered pristine, having low nutrient concentrations. are highly organic contain a mix species mainly from order Chroococcales, two forms Aphanothece being dominant. However polymerase chain reaction (PCR) analysis indicates close similarity to Microcystis flos-aquae. cells appear lack...
Mining is an environmentally destructive human activity. Consequently, community expectations and legislation require minimisation of impacts rehabilitation once mining ceases. Rehabilitation standards now include restoration structural functional attributes pre-disturbed landscapes. However, insufficient baseline data before, during, often makes it difficult to assess develop objectives. Techniques that retrospectively document the pre-impact condition environmental history wetlands...
This is the first detailed account of Nostocales north-eastern Australia, and third final volume in series documenting freshwater cyanobacterial flora this region. monophyletic group comprises filamentous cyanobacteria which produce heterocytes akinetes. Amongst cyanobacteria, perhaps most morphologically diverse, occurring as single filaments, unstructured aggregations, or colonies various arrangements, may exhibit false-, true-, no-branching. provides keys, morphological ecological data,...