A5014569063- Underwater Acoustics Research
- Marine animal studies overview
- Marine and fisheries research
- Underwater Vehicles and Communication Systems
- Oceanographic and Atmospheric Processes
- Marine Toxins and Detection Methods
- Isotope Analysis in Ecology
- Marine and coastal plant biology
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Cephalopods and Marine Biology
- Marine Biology and Ecology Research
- Flow Measurement and Analysis
- Vibrio bacteria research studies
- Advanced Chemical Sensor Technologies
- Neuroscience of respiration and sleep
- Climate change and permafrost
- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Seismic Imaging and Inversion Techniques
- Cassava research and cyanide
- Ichthyology and Marine Biology
Commonwealth Scientific and Industrial Research Organisation
2016-2025
University of Tasmania
2016-2025
Health Sciences and Nutrition
2022-2025
CSIRO Oceans and Atmosphere
2018-2023
NOAA National Ocean Service
2009-2010
Kelps are important habitat-forming species in shallow marine environments, providing critical habitat, structure, and productivity for temperate reef ecosystems worldwide. Many kelp currently endangered by myriad pressures, including changing water temperatures, invasive species, anthropogenic threats. This situation necessitates advanced methods to detect density, which would allow tracking density changes, understanding ecosystem dynamics, informing evidence-based management strategies....
Antarctic sea ice is known to provide unique ecosystem habitat at the ice–ocean interface. Mapping characteristics—such as thickness and roughness—at high resolution from beneath difficult due access. A Geoswath Plus phase-measuring bathymetric sonar mounted on an autonomous underwater vehicle (AUV) was employed in this study collect data underneath Cape Evans Antarctica November 2014. This demonstrates how acoustic can be collected processed resolutions of 1 m for bathymetry 5 cm...
Abstract Shedding light on the distribution and ecosystem function of mesopelagic communities in twilight zone (~200–1000 m depth) global oceans can bridge gap estimates species biomass, trophic linkages, carbon sequestration role. Ocean basin-scale bioacoustic data from ships opportunity programs are increasingly improving this situation by providing spatio-temporal calibrated acoustic snapshots that mutually complement established ecosystem, carbon, biogeochemical models. This descriptor...
Multibeam echosounder water column data provides a three-dimensional image of features between the surface and seafloor. Although this swath acoustic can be collected over wide range angles, most data, at least beyond to first seafloor return, is contaminated by noise created receiver array sidelobe interference. As result, minimum slant commonly excluded from analysis. This paper demonstrates method consistently filter extract targets comprising gas seep feature across multibeam swath,...
Robust definition of the spatial extent seafloor habitats and how they may be changing through time is a holy grail for ecosystem management, particularly if an approaching tipping point beyond which irreversible changes occur. Here we generate explore new data set management warming reefs in eastern Tasmania, Australia that will significantly improve baseline maps required fine-scaled modelling is, both robust at regional scales highly resolved within water column. This procedure enabled...
Sidelobe interference artefacts are a common occurrence in multibeam echosounder water-column data. They very commonly observed the across-track dimension, where they appear as semi-circular noise pattern, affecting particular data at range beyond minimum depth range. However, also occur along-track affect just above seafloor near prominent features rising seabed. Here, we present simple model for estimating probable location of sidelobe dimension. We test accuracy by comparing average...
Over the past few years, improvements in broadband split-beam echosounders have made it possible to obtain precise measurements of bubble-size distribution and density gas seeps. Here, we model acoustic volume backscattering a group bubbles with multi-modal size that matched real-time acoustical measurement over seep. The results are profiles bubble descriptors (e.g., type parameters), ratio various components (i.e., composition). To test ability this methodology differentiate flux...
Detecting and characterizing oceanic seep sites is of considerable interest for the geoscience community due to their influence on global climate, ecological significance, connection resources high value, and, in many locations including New Zealand, cultural importance. Modern acoustic systems provide means quantitative analysis by collection backscattered energy gas bubbles associated water column phenomena surrounding seafloor. The July 2018 international, multi-institution Quantitative...
Water column data (WCD) collected by multibeam echosounders (MBES) provide valuable datasets for the detection of gas bubbles. However, presence noise patterns, primarily caused sidelobe interference from seafloor reverberation, limits usability WCD. We present a method simulating characteristic patterns in WCD, particularly Mills Cross configurations, predicted reverberation and transducer artefacts. The simulation is based on reference pattern created subset then applied as correction...