Zhi Huang

Zhi Huang
Rutgers, The State University of New Jersey | Rutgers · Business School - Newark and New Brunswick

About

49
Publications
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Citations

Publications

Publications (49)
Article
Full-text available
Seabed morphology maps and data are critical for knowledge-building and best practice management of marine environments. To facilitate objective and repeatable production of these maps, we have developed a number of semi-automated, rule-based GIS tools (Geoscience Australia’s Semi-automated Morphological Mapping Tools - GA-SaMMT) to operationalise...
Article
The approach and results of our 2019 paper (Brooke et al., 2019) have been criticised by Dougherty (2022). We examined the sensitivity of a tropical, coarse sand strandplain to changes in relative sea level as expressed through beach-ridge morphology and the elevation of beach berms preserved in the succession of cyclone-generated beach ridges at C...
Technical Report
Full-text available
This report is one in a series of eco-narrative documents that synthesise our existing knowledge of Australian Marine Parks. These are intended to enable managers and researchers to ascertain the physical and ecological characteristics of each park, and to highlight knowledge gaps for future research focus. The information in this eco-narrative for...
Article
Full-text available
Systematic conservation planning requires spatial information on biodiversity. Such information is often unavailable, forcing spatial planning to rely on assumed relationships between species and environmental features. This problem is particularly acute in large, remote marine protected areas that are proliferating rapidly. Here, we use models to...
Technical Report
Full-text available
This report is one in a series of eco-narrative documents that synthesise our existing knowledge of Australia’s individual Marine Parks. This series is a product of the National Environmental Science Program Marine Biodiversity Hub Project D1, which seeks to collate, synthesise and visualise biophysical data within the parks. These documents are in...
Data
Description ABSTRACT This dataset provides spatially continuous predictions of seabed %mud (< 63 µm), %sand (63-2000 µm) and %gravel (>2000 µm) content for eight survey areas in the Timor Sea region of the Australian continental EEZ. Data are presented in 10 m resolution raster grids format and ascii text file. Predictions are based on 195 samples...
Article
Northeastern Queensland is a far-field site from ice caps formed during the Last Glacial. However, the region has experienced glacio-hydroisostatically driven coastal elevation change during the Holocene that generated a distinctive relative sea-level record. We tested whether this subtle vertical movement of the coast is recorded in the morphology...
Technical Report
Full-text available
Australia’s Exclusive Economic Zone (EEZ) is the third largest maritime territory in the world. Monitoring its dynamics is fundamental to understanding and reporting on how the ocean is responding to human pressures and global environmental change. Increasingly stringent conservation budgets, however, are placing a strong emphasis on strategic reso...
Presentation
Full-text available
The broad continental shelf offshore northern Australia is characterised by extensive carbonate banks, terraces and pinnacles that provide potential habitats for sponge communities. Previous research in the region has established a baseline environmental inventory of these communities for these seabed features at the local scale and explored multiv...
Article
A key requirement for managing commercial fisheries is understanding the geographic footprint of the resource, the level of exploitation and the potential impacts of changing climate or habitat conditions. The development of spatially explicit predictive models of species distributions combined with predictions of changing oceanographic conditions...
Article
Sediment properties are known to influence acoustic backscatter intensity. This sediment-acoustic relationship has been investigated previously through using physical geoacoustic models and empirical methods and found to be complex and nonlinear. Here we employ a robust machine-learning statistical model (random forest decision tree) to investigate...
Article
Full-text available
Spatial information on the distribution of seabed substrate types in high use coastal areas is essential to support their effective management and environmental monitoring. For Darwin Harbour, a rapidly developing port in northern Australia, the distribution of hard substrate is poorly documented but known to influence the location and composition...
Article
Full-text available
Some of the highest density pockmark fields in the world have been observed on the northwest Australian continental shelf (>700/km2) where they occur in muddy, organic-rich sediment around carbonate banks and paleochannels. Here we developed a semi-automated method to map and quantify the form and density of these pockmark fields (~220,000 pockmark...
Presentation
Full-text available
Abstract: Spatial predictive models have been increasingly employed to generate spatial predictions for environmental management and conservation. The accuracy of predictive models and their predictions is essential to support evidence-based decision making with high-quality information. However, the development of predictive models with high predi...
Article
The seascape of the vast Australian continental margin is characterised by numerous submarine canyons that represent an equally broad range of geomorphic and oceanographic heterogeneity. Theoretically, this heterogeneity translates into habitats that may vary widely in their ecological characteristics. Here we describe the methodology to develop a...
Article
Full-text available
Marine seismic surveys are an important tool to map geology beneath the seafloor and manage petroleum resources, but they are also a source of underwater noise pollution. A mass mortality of scallops in the Bass Strait, Australia occurred a few months after a marine seismic survey in 2010, and fishing groups were concerned about the potential relat...
Article
Spatial distribution of sponge species richness (SSR) and its relationship with environment are important for marine ecosystem management, but they are either unavailable or unknown. Hence we applied random forest (RF), generalised linear model (GLM) and their hybrid methods with geostatistical techniques to SSR data by addressing relevant issues w...
Article
Full-text available
Palaeoshorelines that lie submerged on stable continental shelves are relict coastal depositional and erosional structures formed during periods of lower sea level. An analysis of the well-dated Late Quaternary (0–128 ka) sea-level record indicates that the most persistent (modal) lower sea levels were at 30 – 40m below present, which occurred betw...
Article
Full-text available
Surficial marine sediments are an important source of nutrients for productivity and biodiversity, yet the biogeochemistry of these sediments is poorly known in Australia. Seabed samples were collected at >350 locations in Australia’s western, northern and eastern continental margins during Federal Government surveys (2007–14). Parameters analysed...
Technical Report
Full-text available
Effective management of marine assets requires an understanding of ecosystems and the processes that influence patterns of biodiversity. Project D1 of the NESP Marine Biodiversity Hub has been collating and synthesising existing data through 2015/16, focusing on Commonwealth Marine Reserves (CMRs, now Australian Marine Parks AMPs) and Key Ecologica...
Presentation
Full-text available
In the marine environment, sponge communities are potential biodiversity hotspots. However, knowledge of their spatial distribution and our understanding of their relationships with environmental variables remain limited. In this study, we modelled sponge species richness (SSR) data for 77 samples from a Marine Protected Area offshore northern Aust...
Presentation
Full-text available
The broad continental shelf offshore northern Australia is characterised by extensive areas of carbonate banks, terraces and isolated pinnacles. These seabed features provide potential habitat for sponge communities and are recognised as Key Ecological Features of regional significance within the Oceanic Shoals Commonwealth Marine Reserve (area: 72...
Technical Report
Full-text available
A scientific workshop for NESP Project D1 ‘Developing a toolbox of predictive models for the monitoring and management of KEFs and CMRs in the North and North-west regions’ was held at Geoscience Australia 9-10 September 2015. The objectives of the workshop were to discuss future research priorities for the North and North-West regions and to defin...
Article
Multibeam bathymetric data provides critical information for the modelling of seabed geology and benthic biodiversity. The accuracy of these models is dependent on the accuracy of the bathymetric data which contains uncertainties that are stochastic at individual soundings but exhibit a distinct spatial distribution with increasing magnitude from n...
Book
Full-text available
This report presents the results of seabed mapping and habitat classification surveys completed in Darwin Harbour during 2011 and 2013 as part of the Northern Territory Government’s marine habitat mapping program. This research aims to provide baseline data on the existing marine habitats and characteristics of the Darwin Harbour region. It is a co...
Article
The Leeuwin Current is an anomalous poleward-flowing eastern boundary current that transports warm tropical waters southward and imposes significant ecological influences on the coastal marine ecosystems off Western Australia. In this study, we attempt to map the spatial structure of the sea surface temperature (SST) signature of the Leeuwin Curren...
Conference Paper
Under climate change scenarios, rises in ocean temperature are likely to impact the range and spatial scale of species distributions. The rate of warming in south-east Australia is several times faster than global averages and therefore, we are likely to see a tropicalisation of temperate ocean systems through range expansions. Abalone are high val...
Article
Full-text available
Environmental context Australia's tropical marine estate is a biodiversity hotspot that is threatened by human activities. Analysis and interpretation of large physical and geochemistry data sets provides important information on processes occurring at the seafloor in this poorly known area. These processes help us to understand how the seafloor fu...
Article
Full-text available
Submarine canyons influence oceanographic processes, sediment transport, productivity and benthic biodiversity from the continental shelf to the slope and beyond. However, not all canyons perform the same function. The relative influence of an individual canyon on these processes will, in part, be determined by its form, shape and position on the c...
Article
Full-text available
A key requirement for informed marine-zone management is an understanding of the spatial patterns of marine biodiversity, often measured as species richness, total abundance or presence of key taxa. In the present study, we focussed on the diversity of benthic infauna and applied a predictive modelling approach to map biodiversity patterns for thre...
Presentation
Full-text available
Spatial information on seabed biodiversity is important for marine zone management in Australia and is often predicted using spatially continuous data of seabed biophysical properties. Seabed hardness is one of the important properties for predicting biodiversity and is often inferred from multibeam echo-sounder backscatter data. Seabed hardness ca...
Chapter
The spatial information of the seabed biodiversity is important for marine zone management in Australia. The biodiversity is often predicted using spatially continuous data of seabed biophysical properties. Seabed hardness is an important property for predicting the biodiversity and is often inferred from multibeam backscatter data. Seabed hardness...
Article
Angular response curves of multibeam backscatter data are used to predict the distributions of seven seabed cover types in an acoustically-complex area of the continental shelf of Western Australia. Several feature analysis approaches on the angular response curves are examined. A Probability Neural Network model was chosen for the predictive mappi...
Book
Full-text available
This report presents the results of a study on the use of multibeam sonar data to objectively classify and predict seabed substrate, with a focus upon delineating areas of hard and soft seabed. The analysis utilises multibeam sonar data, seabed samples and underwater video observations from four study areas on the Van Diemen Rise in the Timor Sea....
Article
Marine physical and geochemical data can be valuable surrogates for predicting the distributions and assemblages of marine species. This study investigated the bio-environment (surrogacy) relationships in Jervis Bay, a sandy marine embayment in south-eastern Australia. A wide range of co-located physical data were analysed together with biological...
Article
Full-text available
Seabed sediment textural parameters such as mud, sand and gravel content can be useful surrogates for predicting patterns of benthic biodiversity. Multibeam sonar mapping can provide near-complete spatial coverage of high-resolution bathymetry and backscatter data that are useful in predicting sediment parameters. Multibeam acoustic data collected...
Presentation
Full-text available
Spatial interpolation methods are essential for generating spatially continuous data from point samples of environmental variables for environmental management and conservation. They fall into three groups: non-geostatistical methods (e.g., inverse distance weighting), geostatistical methods (e.g., ordinary kriging) and combined/hybrid methods (e.g...
Article
Full-text available
Mapping of benthic habitats seldom considers biogeochemical variables or changes across time. We aimed to: (i) develop winter and summer benthic habitat maps for a sandy embayment; and (ii) compare the effectiveness of various maps for differentiating infauna. Patch types (internally homogeneous areas of seafloor) were constructed using combination...
Article
Spatially continuous data of environmental variables is often required for marine conservation and management. However, information for environmental variables is usually collected by point sampling, particularly for the marine region. Thus, methods generating such spatially continuous data by using point samples to estimate values for unknown loca...
Article
This study tested the performance of 15 predictive models in predicting the distribution of sponge assemblages on the Australian continental shelf using a common set of marine environmental variables. The models included traditional regression and more recently developed machine learning models. The results demonstrate that the spatial distribution...
Article
Reliable marine benthic habitat maps at regional and national scales are needed to enable the move towards the sustainable management of marine environmental resources. Due to the paucity of adequate biological data and the prohibitive cost of directly sampling benthic biota over large areas, the most effective means of developing broad-scale benth...
Data
GEOMET: 14815. Data format: Digital ArcGIS-grid (ArcInfo grid) in 0.01 decimal degree resolution in WGS84 and digital ASCII text in 0.01 decimal degree resolution in WGS84 [http://pid.geoscience.gov.au/dataset/ga/71977].
Data
GEOMET: 14835. Data format: Digital ArcGIS-grid (ArcInfo grid) in 0.01 decimal degree resolution in WGS84 and digital ASCII text in 0.01 decimal degree resolution in WGS84 [http://pid.geoscience.gov.au/dataset/ga/71981].
Data
GEOMET: 14867. Data format: Digital ArcGIS-grid (ArcInfo grid) in 0.01 decimal degree resolution in WGS84 and digital ASCII text in 0.01 decimal degree resolution in WGS84 [http://pid.geoscience.gov.au/dataset/ga/71982].
Poster
Full-text available
Geoscience Australia is supporting the establishment of Australia’s national representative system of marine protected areas through provision of spatial information about the physical and biological character of the seabed. Central to this approach is reliable seabed mapping and characterisation, and robust surrogacy research for the prediction of...
Poster
Full-text available
Geoscience Australia is supporting the exploration and development of offshore oil and gas resources and establishment of Australia’s national representative system of marine protected areas through provision of spatial information about the physical and biological character of the seabed. Central to this approach is prediction of Australia’s seabe...

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