Journal articles: 'Perth Region'

1

Cowan, R. S., N. G. Marchant, J. R. Wheeler, B. L. Rye, E. M. Bennett, N. S. Lander, and T. D. Macfarlane. "Flora of the Perth Region." Taxon 37, no. 1 (February 1988): 203. http://dx.doi.org/10.2307/1220966.

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2

Adams, Tony. "PERTH METROPOLITAN REGION BIKE PLAN." Australian Planner 24, no. 2 (June 1986): 28. http://dx.doi.org/10.1080/07293682.1986.9657301.

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3

Bowdler, Sandra, Lynda Strawbridge, and Madge Schwede. "Archaeological Mitigation In The Perth Metropolitan Region." Australian Archaeology 32, no. 1 (January 1991): 21–25. http://dx.doi.org/10.1080/03122417.1991.11681407.

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4

Rye, P. J. "Modelling photochemical smog in the Perth region." Mathematical and Computer Modelling 21, no. 9 (May 1995): 111–17. http://dx.doi.org/10.1016/0895-7177(95)00059-b.

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5

Hurley, P. J., and P. C. Manins. "Meteorological Modeling on High-Ozone Days in Perth, Western Australia." Journal of Applied Meteorology 34, no. 7 (July 1, 1995): 1643–52. http://dx.doi.org/10.1175/1520-0450-34.7.1643.

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Abstract The West Australian capital city of Perth is located on a coastal plain between the sea to the west and an escarpment rising to the east. It is isolated from all other cities or sources of pollution. In this study, the meteorological conditions leading to high ozone levels have been classified according to the dominant weather patterns using both synoptic charts and air monitoring data. The data revealed that practically all high-ozone days were associated with recirculation of ozone or its precursors. Meteorological modeling was then performed for the generic conditions leading to high ozone in the Perth region. The modeling predicted that recirculation of surface air over the Perth region was common. Both same-day and next-day recirculation of surface air are features of the model predictions and are conducive to high ozone levels. The modeling predicts day-by-day buildup of smog to be a favored occurrence under these synoptic conditions. Other interesting meteorological features seen in Perth observations on high-ozone days were also predicted by the modeling, including stalling sea breezes under some conditions, hydraulic jump effects over the escarpment, and mesoscale enhancement of the west coast trough.

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6

Chessman, Bruce C., Kerry M. Trayler, and Jennifer A. Davis. "Family- and species-level biotic indices for macroinvertebrates of wetlands on the Swan Coastal Plain, Western Australia." Marine and Freshwater Research 53, no. 5 (2002): 919. http://dx.doi.org/10.1071/mf00079.

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SWAMPS (Swan Wetlands Aquatic Macroinvertebrate Pollution Sensitivity) was developed as a biotic index for wetlands near Perth, Western Australia. Numerical grades between 1 and 100 were assigned to wetland macroinvertebrate taxa, generally at the family and species levels, to reflect the sensitivities of these taxa to anthropogenic disturbance, primarily nutrient enrichment. Index scores for individual wetlands were calculated as abundance-weighted or unweighted means of the grades of all taxa present in standard samples. Scores calculated at both the family and species levels showed a strong correlation with independent measures of cultural eutrophication and other anthropogenic disturbances, but such correlations were generally higher for the species-level index. The species index also discriminated more between individual wetlands. SWAMPS should be useful in routine and rapid assessment and monitoring of wetland condition in the Perth region and could be easily adapted to other regions and continents.

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7

Allinson, William Guy, Richard Edward Dunsmore, Peter Ross Neal, and Minh T. Ho. "The Cost of Carbon Capture and Storage in the Perth Region." SPE Projects, Facilities & Construction 2, no. 03 (September 1, 2007): 1–6. http://dx.doi.org/10.2118/101122-pa.

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8

Pearce, Robert L., and David I. Grove. "Tick infestation in soldiers who were bivouacked in the Perth region." Medical Journal of Australia 146, no. 5 (March 1987): 238–40. http://dx.doi.org/10.5694/j.1326-5377.1987.tb120228.x.

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9

Curtis, Carey. "Network City: Retrofitting the Perth Metropolitan Region to Facilitate Sustainable Travel." Urban Policy and Research 24, no. 2 (June 2006): 159–80. http://dx.doi.org/10.1080/08111140600703691.

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10

Hillman, Alison, and R. C. Andrew Thompson. "Interactions between humans and urban-adapted marsupials on private properties in the greater Perth region." Australian Mammalogy 38, no. 2 (2016): 253. http://dx.doi.org/10.1071/am15045.

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This study documents a range of interactions between humans and quenda (Isoodon obesulus) and brushtail possums (Trichosurus vulpecula) in urbanised Perth, Australia. These interactions are of veterinary public health significance. Findings suggest that public education is important to safeguard the health of both the marsupials and humans involved in such interactions.

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11

Gorter, J. D., and J. M. Davies. "UPPER PERMIAN CARBONATE RESERVOIRS OF THE NORTH WEST SHELF AND NORTHERN PERTH BASIN, AUSTRALIA." APPEA Journal 39, no. 1 (1999): 343. http://dx.doi.org/10.1071/aj98019.

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The Perth, Carnarvon, Browse, and Bonaparte basins contain Permian shallowmarine carbonates. Interbedded with clastic oil and gas reservoirs in the northern Perth Basin (Wagina Formation), and gas reservoirs in the Bonaparte Basin (Cape Hay and Tern formations), these carbonates also have the potential to contain significant hydrocarbon reservoirs. Limestone porosity may be related to the primary depositional fabric, or secondary processes such as dolomitisation, karstification, and fracturing. However, in the Upper Permian interval of the North West Shelf and northern Perth Basin, where there are no indications of significant preserved primary porosity in the limestones, all known permeable zones are associated with secondary porosity. Fractured Permian carbonates have the greatest reservoir potential in the Timor Sea. Tests of fractured Pearce Formation limestones in Kelp Deep–1 produced significant quantities of gas, and a test of fractured Dombey Formation limestone in Osprey–1 flowed significant quantities of water and associated gas. Minor fracture porosity was associated with gas shows in dolomitic limestones in Fennel–1 in the Carnarvon Basin, and fractures enhance the reservoir in the Woodada Field in the northern Perth Basin. Karst formation at sub-aerial unconformities can lead to the development of secondary porosity and caverns, as in the Carnarvon Basin around Dillson–1. Minor karst is also developed at the top Dombey Formation unconformity surface in the Timor Sea region.

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12

Ikeda, Akihito. "A Study on Public-Private Partnership in Perth Metropolitan Region, Western Australia." Journal of the City Planning Institute of Japan 52, no. 3 (October 25, 2017): 929–36. http://dx.doi.org/10.11361/journalcpij.52.929.

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13

Newman, P. W. G., J. R. Kenworthy, and T. J. Lyons. "Transport energy use in the Perth Metropolitan Region: Some urban policy implications." Urban Policy and Research 3, no. 2 (June 1985): 4–15. http://dx.doi.org/10.1080/08111148508522597.

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14

Gozzard, J. R. "Medium scale engineering and environmental geology mapping of the Perth Metropolitan region." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 22, no. 6 (December 1985): 182. http://dx.doi.org/10.1016/0148-9062(85)90128-7.

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15

A. How, R., and J. Dell. "The zoogeographic significance of urban bushland remnants to reptiles in the Perth region, Western Australia." Pacific Conservation Biology 1, no. 2 (1994): 132. http://dx.doi.org/10.1071/pc940132.

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The 71 reptile species occurring in the Perth region make this area as diverse as any similar sized coastal region in Australia. Cluster analysis of the lizard assemblages of 17 bushland remnants in the region indicate that three main sub-regions can be identified; Darling Plateau and Scarp, Offshore Islands and Swan Coastal Plain. Within the Swan Coastal Plain the lizard and skink faunas of remnant bushlands on the same landform are more similar to one another than they are to those of adjacent landforms. The Swan River appears to be a distributional boundary for some species. Species-area relationships indicate a variety of responses amongst the different taxonomic groups of reptiles, with snakes being the most sensitive to loss of habitat. The isolated remnant bushlands of inner urban areas retain a variety of reptile species, but there is no significant relationship with remnant size. The implications of zoogeographic and area relationships to conservation are discussed.

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16

Drew, Joseph, and Brian Dollery. "Would Bigger Councils Yield Scale Economies in the Greater Perth Metropolitan Region? A Critique of theMetropolitan Local Government Reviewfor Perth Local Government." Australian Journal of Public Administration 73, no. 1 (March 2014): 128–37. http://dx.doi.org/10.1111/1467-8500.12059.

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17

Leslie, Lance M., Bruce W. Buckley, and Mark Leplastrier. "The Operational Impact of QuikSCAT Winds in Perth, Australia: Examples and Limitations." Weather and Forecasting 23, no. 1 (February 1, 2008): 183–93. http://dx.doi.org/10.1175/2007waf2007027.1.

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Abstract The preparation of accurate operational weather forecasts and the timely issuance of severe marine weather and ocean warnings and advisories for major oceanic weather systems impacting both coastal areas and the open ocean are major forecasting problems facing the Australian Bureau of Meteorology’s Regional Forecast Centre (RFC) and its collocated Tropical Cyclone Warning Centre (TCWC) in Perth, Western Australia. The region of responsibility for the Perth RFC is vast, covering a large portion of the southeast Indian and Southern Oceans, both of which are extremely data sparse, especially for near-surface marine wind data. Given that these coastline and open-ocean areas are subject to some of the world’s most intense tropical cyclones, rapidly intensifying midlatitude cyclones, and powerful cold fronts, there is now a heavy reliance upon NASA Quick Scatterometer (QuikSCAT) data for both routine and severe weather warning forecasts. The focus of this note is on the role of QuikSCAT data in the Perth RFC for the accurate and early detection of maritime severe weather systems, both tropical and extratropical. First, the role of QuikSCAT data is described, and then three cases are presented in which the QuikSCAT data were pivotal in providing forecast guidance. The cases are a severe tropical cyclone in its development phase off the northwest coast of Australia, a strong southeast Indian Ocean cold front, and an explosively developing midlatitude Southern Ocean cyclone. In each case, the Perth RFC would have been unable to provide early and high-quality operational forecast and warning guidance without the timely availability of the QuikSCAT surface wind data.

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18

Appleyard, S. J. "Impact of stormwater infiltration basins on groundwater quality, Perth metropolitan region, Western Australia." Environmental Geology 21, no. 4 (August 1993): 227–36. http://dx.doi.org/10.1007/bf00775912.

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19

Hillman, Alison E., Rongchang Yang, Alan J. Lymbery, and R. C. Andrew Thompson. "Eimeria spp. infecting quenda ( Isoodon obesulus ) in the greater Perth region, Western Australia." Experimental Parasitology 170 (November 2016): 148–55. http://dx.doi.org/10.1016/j.exppara.2016.09.012.

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20

Costello, Greg, and Steven Rowley. "The Impact of Land Supply on Housing Affordability in the Perth Metropolitan Region." Pacific Rim Property Research Journal 16, no. 1 (January 2010): 5–22. http://dx.doi.org/10.1080/14445921.2010.11104292.

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21

Gozzard, J. R. "Medium-scale engineering- and environmental-geology mapping of the perth metropolitan region, Western Australia." Engineering Geology 22, no. 1 (September 1985): 97–107. http://dx.doi.org/10.1016/0013-7952(85)90041-9.

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22

Shephard, R. B., E. G. C. Smith, and D. D. Spurr. "Earthquake insurance loss assessments for regions of Australia." Bulletin of the New Zealand Society for Earthquake Engineering 30, no. 1 (March 31, 1997): 32–39. http://dx.doi.org/10.5459/bnzsee.30.1.32-39.

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Following the Newcastle earthquake of December 1989, a consortium of Australian insurance companies commissioned Works Consultancy Services Ltd, New Zealand to undertake earthquake probable maximum loss assessments for the main city centres of Australia. Studies have been completed for the regions around Sydney, Melbourne, Adelaide, Perth and Brisbane. Customised insurance loss assessment models were developed for each study region, with each including specific analytical models for geography, seismicity, ground conditions, patterns of building construction, and insurance company exposures. The analysis model includes earthquake insurance loss versus shaking intensity relationships derived from Australian and international data, and takes specific building vulnerabilities into account. Loss assessments target the Probable Maximum Loss in relation to return period.

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23

Wrigley, TJ, SW Rolls, and JA Davis. "Limnological features of coastal-plain wetlands on the Gnangara Mound, Perth, Western Australia." Marine and Freshwater Research 42, no. 6 (1991): 761. http://dx.doi.org/10.1071/mf9910761.

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The Gnangara Mound is an area of elevated sandy soil on the Swan Coastal Plain to the north of Perth. It constitutes a major groundwater resource for metropolitan Perth. Sixteen wetlands on the Mound had total phosphorus concentrations of 12-462�g L-1, the high values being attributed to agricultural and urban activity. Sediment concentrations of total phosphorus and total nitrogen were 61-954 and 1212-16739 �g g-1, respectively. Conductivities were 505-10270 �S cm-1, and pH values were 3.3-9.3. Only one wetland was highly coloured (79.9 8440 m-1), with an E4/E6 ratio of 4.6. Chlorophyll a concentrations were 0.01-130.8�g L-1; in wetlands with low gilvin concentrations, Myxophyceae dominated, whereas wetlands with higher gilvin concentrations had large numbers of diatoms and Chlorophyceae. The highly coloured wetland had the lowest chlorophyll a concentration despite high nutrient concentrations, supporting the hypothesis that the consequent reduction in light or other associated factors are important in maintaining low phytoplankton biomass in dystrophic wetlands of the region, particularly those on Bassendean sands.

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24

Searle, D. J., and P. J. Woods. "Detailed Documentation of a Holocene Sea-Level Record in the Perth Region, Southern Western Australia." Quaternary Research 26, no. 3 (November 1986): 299–308. http://dx.doi.org/10.1016/0033-5894(86)90091-8.

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Holocene prograded coastal sequences at Becher/Rockingham, southern Western Australia, contain a detailed record of sea level over the last 6400 yr. Radiocarbon dating and use of a distinct stratigraphic indicator as a sea-level marker permit reconstruction of sea-level history and suggest that the sea was at least 2.5 m above present datum about 6400 yr B.P. before falling to its present level. No evidence was found for eustatic fluctuations of the scale proposed by R. W. Fairbridge [1961,in“Physics and Chemistry of the Earth” (L. H. Ahrens, F. Press, K. Rankema, and S. K. Runcorn, Eds.), Vol. 4, pp. 99–185, Pergamon, Oxford]. The sea-level record preserved on this coast can be explained by hydro-isostasy, tectonism, or eustasy, acting individually or in concert. Without a fixed reference point or analogous data from other locations, a firm conclusion on which mechanism(s) has(have) operated could not be reached. Published sea-level data from this and other coasts are often insufficiently detailed to compare with this study. Application of the techniques of this study to analogous sedimentary sequences elsewhere will provide data of comparable accuracy that would contribute to a more precise understanding of relative sea-level movements in the late Quaternary.

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25

Bailey, Adam, Rosalind King, and Guillaume Backé. "Integration of structural, stress, and seismic data to define secondary permeability networks through deep-cemented sediments in the Northern Perth Basin." APPEA Journal 52, no. 1 (2012): 455. http://dx.doi.org/10.1071/aj11036.

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Understanding natural fracture networks has increasingly been recognised as an important factor for the prospectivity of a geothermal play, as they commonly exert a prime control over permeability at depth. The onshore Northern Perth Basin provides a good example of how fracture stimulation, and subsequent enhancement of the structural permeability, during hydrocarbon production can enhance flow rate from original tight gas reservoirs. Low primary porosity and permeability values have been initially recorded in the Northern Perth Basin due to silica-rich groundwater infiltration and consequent quartz cementation. Geothermal energy prospectivity in the region will therefore depend heavily on similar engineering techniques or on the presence of secondary permeability due to interconnected natural fractures. The existence and extent of these natural fractures are verified in this study through an integrated analysis of geophysical logs (including wellbore image logs), wells tests, and 3D seismic data. Wellbore image logs from 11 petroleum wells in the Northern Perth Basin are used to identify borehole failure (such as borehole breakout and drilling-induced tensile fractures) to give a present-day maximum horizontal stress orientation of N076°E (with an s.d. of 13°). Density logs and leak off tests from 13 petroleum wells are used to constrain the present-day stress magnitudes, giving a transitional strike-slip fault to reverse-fault stress regime in the Northern Perth Basin. 870 fractures are identified in image logs from 13 petroleum wells in the Northern Perth Basin, striking roughly north to south and northwest to northeast. Fractures aligned in the present-day stress field are optimally oriented for reactivation, and are hence likely to be open to fluid flow. Electrically resistive and conductive natural fractures are identified on the wellbore image logs. Resistive fractures are considered to be cemented with electrically resistive cement (such as quartz or calcite) and thus closed to fluid-flow. Conductive fractures are considered to be uncemented and open to fluid-flow, and are thus important to geothermal exploration. Fracture susceptibility diagrams constructed for the identified fractures illustrate that the conductive fractures are optimally oriented for reactivation in the present-day strike-slip fault to reverse-fault stress regime, and so are likely to be open to fluid flow. This is reinforced by the correlation of drilling fluid loss and conductive natural fractures in three wells in the Northern Perth Basin. To gain an understanding of the extent and interconnectedness of these fractures, it is necessary to look at more regional data, such as 3D seismic surveys. It is, however, well-documented that fault and fracture networks like those generally observed in image logs lie well below seismic amplitude resolution, making them difficult to observe directly on amplitude data. Seismic attributes can be calculated to provide some information on sub-seismic scale structural and stratigraphic features. Using a 3D seismic cube acquired over the Dongara North gas field, attribute maps of complex multi-trace dip-steered coherency and most positive curvature were used to document the presence of natural fractures and to best constrain the likely extent of the fracture network. The resulting fracture network model displays relatively good connectivity, which is likely to extend across much of the basin. These optimally oriented fractures are therefore likely to form a secondary permeability network throughout the cemented sediments of the Northern Perth Basin, offering potential deep fluid flow conduits, which may be exploited for the production of geothermal energy.

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26

Peirce, JR. "Morphological and phenological variation in three populations of saffron thistle (Carthamus lanatus L.) from Western Australia." Australian Journal of Agricultural Research 41, no. 6 (1990): 1193. http://dx.doi.org/10.1071/ar9901193.

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Saffron thistle (Carthamus lanatus L.), an erect spiny annual herb, is a weed of pasture and cereal crops in some agricultural areas of southern Australia. Cypselas (achenes or seeds) were collected from mature plants at three sites near Salmon Gums, Moorine Rock and Greenough in Western Australia and grown at South Perth. Two forms were observed and could be distinguished by differences in their phenology and the shape of cotyledons and achenes. After two generations at South Perth, germination in the presence or absence of leaching with water or after storage at daily fluctuating temperatures of 15-60�C indicated that there were differences between forms as well as between different accessions of the same form. This result suggests that genetic as well as environmental factors influence the breakdown of dormancy and promote germination. Differences in germination were detected when a single accession was sown at two sites, one in the south and the other in the north of the cereal-growing region of Western Australia. Low rainfall and temperatures in autumn were primarily responsible for slow and staggered germination at the more southern site. The protracted germination of saffron thistle in the southern cereal-growing districts creates a problem for cultural control and correct timing of herbicide applications.

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27

Appleyard, S., S. Wong, B. Willis-Jones, J. Angeloni, and R. Watkins. "Groundwater acidification caused by urban development in Perth, Western Australia: source, distribution, and implications for management." Soil Research 42, no. 6 (2004): 579. http://dx.doi.org/10.1071/sr03074.

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A decline in the watertable due to a long period of low rainfall, and the disturbance of sulfidic peat soils by dewatering and excavation in the Perth suburb of Stirling, has led to widespread acidification of groundwater at the watertable in a residential area and contamination of groundwater by arsenic and metals. The acidification has been caused by the oxidation of sulfide minerals within the peat, which contains up to 15% by weight of oxidiseable sulfur. Groundwater of pH 1.9 has been measured in shallow monitoring bores in the area, as well as high arsenic (up to 7 mg/L), aluminium (up to 290 mg/L), and iron (up to 1300 mg/L) concentrations. Contaminated groundwater pumped from affected domestic garden bores caused plant deaths in gardens and has given rise to health concerns because of high arsenic and metal concentrations. Drilling has indicated that acidic groundwater generally extends 5–10 m below the watertable, and that deeper groundwater is currently unaffected by contamination. As groundwater forms 70% of Perth’s total water usage and sulfide-rich peat soils are common in the region, acid sulfate soil risk maps and management policies need to be developed and implemented as a matter of urgency to prevent similar acidity problems occurring elsewhere in Perth.

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28

IVESON, J. B., S. D. BRADSHAW, R. A. HOW, and D. W. SMITH. "Human migration is important in the international spread of exoticSalmonellaserovars in animal and human populations." Epidemiology and Infection 142, no. 11 (December 16, 2013): 2281–96. http://dx.doi.org/10.1017/s0950268813003075.

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SUMMARYThe exposure of indigenous humans and native fauna in Australia and the Wallacea zoogeographical region of Indonesia to exoticSalmonellaserovars commenced during the colonial period and has accelerated with urbanization and international travel. In this study, the distribution and prevalence of exoticSalmonellaserovars are mapped to assess the extent to which introduced infections are invading native wildlife in areas of high natural biodiversity under threat from expanding human activity. The major exoticSalmonellaserovars, Bovismorbificans, Derby, Javiana, Newport, Panama, Saintpaul and Typhimurium, isolated from wildlife on populated coastal islands in southern temperate areas of Western Australia, were mostly absent from reptiles and native mammals in less populated tropical areas of the state. They were also not recorded on the uninhabited Mitchell Plateau or islands of the Bonaparte Archipelago, adjacent to south-eastern Indonesia. Exotic serovars were, however, isolated in wildlife on 14/17 islands sampled in the Wallacea region of Indonesia and several islands off the west coast of Perth. Increases in international tourism, involving islands such as Bali, have resulted in the isolation of a high proportion of exotic serovar infections suggesting that densely populated island resorts in the Asian region are acting as staging posts for the interchange ofSalmonellainfections between tropical and temperate regions.

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29

Bond, Cassandra, Hua Li, and Andrew W. Rate. "Land Use Pattern Affects Microplastic Concentrations in Stormwater Drains in Urban Catchments in Perth, Western Australia." Land 11, no. 10 (October 17, 2022): 1815. http://dx.doi.org/10.3390/land11101815.

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Stormwater drains act as important vectors for microplastics, enabling the transportation of microplastic polymers from terrestrial systems where they are produced and consumed to aquatic and marine ecosystems. In this study, microplastic concentrations and their size fractions were measured in six stormwater catchments in the Perth and Peel region of Western Australia. Stormwater drains with contrasting land uses and catchment characteristics were selected and two sites along each drain were sampled. Water samples were filtered in situ with a purpose-built fractionation device. Catchment boundaries and contributing drainage areas were derived from a hydrologically enforced digital elevation model. Microplastic concentrations within the sites varied from 8.8 to 25.1 microplastics/L (mean 14.2 microplastics/L). Fibrous microplastics were the most common morphology, followed by fragments. Polymer types identified using Raman spectroscopy included polypropylene (64.6% of samples), polyethylene (64.7%), polytetrafluoroethylene (5.9%) and polyvinylidene fluoride (5.9%). There was no statistically significant variation in microplastic concentrations across or within stormwater catchments. A linear mixed-effect model showed that several components of the land use pattern: catchment area, catchment population, and the proportion of industrial land, natural land and public open space, were positively related to microplastic concentrations. The proportion of residential land was negatively related to microplastic concentrations. The lack of significant variation in microplastic concentration observed both across and within the catchments points to their ubiquitous presence in stormwater systems in the region. This study is the first to examine microplastic contamination in the water of stormwater drainage systems in Perth, Western Australia. These stormwater systems contain considerable concentrations of microplastics, confirming their importance as transport mechanisms for plastics into aquatic and marine ecosystems.

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30

Recher, Harry F. "Impact of Wildfire on the Avifauna of Kings Park, Perth, Western Australia." Wildlife Research 24, no. 6 (1997): 745. http://dx.doi.org/10.1071/wr97008.

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In January 1989, a wildfire burnt 120 ha (45%) of the 267 ha of native vegetation in Kings Park, Perth, Western Australia. The area burnt included a transect along which birds had been censused during 1986 for comparison with censuses on the same transect during 1928–37 and 1952–55. Counts of birds along the transect from 1989 to 1995 indicate a slow recovery in numbers for 11 (38%) of 29 species present in 1986. Two species disappeared from the transect, but one of these was found elsewhere in the park. There are many reasons for the changes in the avifauna of Kings Park, including changes to the structure of the vegetation, the increasing isolation of the park from other native vegetation, and changes in the distribution and abundance of species outside the Perth region. The long-term trends in the avifauna and the impact of the 1989 fire indicate that a new approach to the management of the Park’s vegetation may be required. For example, to avert continuing declines in the Park’s avifauna, it may be helpful to re-establish a canopy of eucalypts and to create a more open understorey with some bare ground. However, the impact of the 1989 fire and the slow recovery of the avifauna illustrate the sensitivity of small reserves to major disturbances and the difficulty of conserving the original biota without intensive intervention.

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31

Lutz, Natasha, James Fogarty, and Andrew Rate. "Accumulation and potential for transport of microplastics in stormwater drains into marine environments, Perth region, Western Australia." Marine Pollution Bulletin 168 (July 2021): 112362. http://dx.doi.org/10.1016/j.marpolbul.2021.112362.

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32

Ng, Boaz. "Carnivorous plants of the Western Australian granite outcrops." Carnivorous Plant Newsletter 49, no. 1 (March 1, 2020): 28–38. http://dx.doi.org/10.55360/cpn491.bn886.

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At the end of winter in 2019 I embarked on an expedition to Western Australia to find carnivorous plants in the wild. This region is a center of diversity for carnivorous plants, with more than 100 endemic species. My journey took me on a long circuit around the countryside, starting with a drive through the forests of the South West towards the Great Southern coastline, then heading north east to the interior Wheatbelt region, before eventually looping back to Perth. Throughout my 17 days and roughly 3000 kilometers on the road, the geographical features that struck me most were the granite outcrops. These ancient landforms dominate the weathered landscape and give rise to unique habitats on which countless flora and fauna have evolved. It was in these granite ecosystems that I observed the most impressive displays of Drosera and Utricularia.

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33

Jenner, K. C. S., M.-N. M. Jenner, and K. A. McCabe. "GEOGRAPHICAL AND TEMPORAL MOVEMENTS OF HUMPBACK WHALES IN WESTERN AUSTRALIAN WATERS." APPEA Journal 41, no. 1 (2001): 749. http://dx.doi.org/10.1071/aj00044.

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Through compilation of historical whaling data, together with recent aerial and boat-based survey data, a general framework for the overall peaks of migration has been estimated for the temporal and spatial movements of Group IV humpback whales along the Western Australian coast.The migratory paths of humpback whales along the Western Australian coast lie within the continental shelf boundary or 200 m bathymetry. Major resting areas along the migratory path have been identified at Exmouth Gulf (southern migration only) and at Shark Bay. The northern endpoint of migration and resting area for reproductively active whales in the population appears to be Camden Sound in the Kimberley. A 6,750 square km2 area of the Kimberley region, inclusive of Camden Sound, has also been identified as a major calving ground. The northern and southern migratory paths have been shown to be divergent at the Perth Basin, Dampier Archipelago and Kimberley regions. In all cases the northern migratory route is further off-shore.

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Allan, Gregory. "Evidence of motile traps in Byblis." Carnivorous Plant Newsletter 48, no. 2 (June 1, 2019): 51–63. http://dx.doi.org/10.55360/cpn482.ga426.

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Byblis Salisb. is a small genus of carnivorous plants with adhesive traps in the Lamiales family Byblidaceae Domin. There are two perennial species (B. gigantea Lindl. and B. lamellata Conran & Lowrie) with restricted ranges in Western Australia, where they experience a Mediterranean climate. The critically endangered B gigantea is endemic to the Swan River drainage area, now entirely within the Perth metropolitan area, whilst B. lamellata is restricted to the coastal region North of Perth. The genus also contains six currently recognized annual species (B. aquatica Lowrie & Conran, B. filifolia Planch., B. guehoi Lowrie & Conran, B. liniflora Salisb., B. pilbarana Lowrie & Conran, and B. rorida Lowrie & Conran) which inhabit the tropical and semi-arid regions of Northern Australia. The genus also extends to the island of New Guinea (Lowrie 2013; McPherson 2010). All species are found in substrates which are very nutrient-poor (Lowrie 2013; McPherson 2010) and share habitats with representatives of other genera of carnivorous plants (particularly Drosera, but also Utricularia and Nepenthes). Although there are important morphological differences between the Byblis species, all share the same basic structure in that they produce stems from which radiate filiform leaves. Another feature common to all species is the ability to produce fast concentrated growth in response to seasonal rainfall. (Bourke, pers. comm.). It has been observed on many occasions that all Byblis species play host to Miridae bugs from the genus Setocoris (Bourke, pers. comm.). A mutualistic relationship has been proven to exist between another viscid plant genus Roridula and a different genus of the family Miridae, Pameridea (Anderson & Midgley 2003). A similar relationship is strongly suspected in Byblis (Lowrie 2013; Cross et al. 2018).

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Grosjean, Emmanuelle, Chris Boreham, Andrew Jones, Diane Jorgensen, and John Kennard. "A reassessment of the petroleum systems in the offshore northern Perth Basin." APPEA Journal 53, no. 2 (2013): 427. http://dx.doi.org/10.1071/aj12038.

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The discovery of commercial oil in the Cliff Head-1 well in 2001 set an important milestone in the exploration history of the offshore northern Perth Basin. The region had been less explored before then, partly due to the perception that the main source of onshore petroleum accumulations, the Late Permian-Early Triassic Hovea Member, had only marginal potential offshore. The typing of the Cliff Head oil to the Hovea Member provided evidence that the key onshore petroleum system extends offshore and has revitalised exploration with 13 new field wildcat wells drilled since 2002. A reassessment of the hydrocarbon generative potential in the offshore northern Perth Basin confirms the widespread occurrence of good to excellent oil-prone Hovea Member source rocks in the Beagle Ridge and Abrolhos Sub-basin. The Early Permian Irwin River Sequence and several Jurassic Sequences are also recognised as prime potential source rocks offshore, mostly for their gas-generative potential. The unique hydrocarbon assemblages exhibited by the Hovea Member extracts are shared by the oils recovered from Permian reservoirs in the offshore Cliff Head-3 and Dunsborough-1 wells, indicating the Hovea Member as the primary source charging these accumulations. Geochemical correlation of oil stains from Hadda-1 and as far north as Livet-1 provides evidence for a working Early Triassic petroleum system across much of the Abrolhos Sub-basin. In this area, the Hovea Member was shown to be both of limited quality and only marginally mature for oil generation, which suggests the occurrence of effective source kitchens in the adjacent Houtman Sub-basin.

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Lim, David, Geoff Strachan, Dominique Van Gent, and Sandeep Sharma. "Underground storage of carbon dioxide in the Harvey area, south-west Western Australia." APPEA Journal 57, no. 1 (2017): 177. http://dx.doi.org/10.1071/aj16042.

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Underground storage of carbon dioxide as a means of reducing atmospheric emissions of CO2 has been examined both theoretically and practically over the past decade. There is a large amount of research and field experience in the energy sector to show that underground storage of CO2 is feasible. The Global Carbon Capture and Storage Institute has identified 38i large-scale projects (operating and/or in the planning) with many companies currently sequestering tons of CO2 per year. This paper reports on static and dynamic modelling studies conducted on the Harvey structure, onshore Perth Basin, to assess the suitability of the Lesueur Sandstone in the Lower Lesueur Region of Western Australia as a potential geological CO2 sequestration site. The study area for this project within this structure covers 332 km2 and is located approximately 13 km north-west of the town of Harvey, south of Perth. The static and dynamic modelling investigated a suite of full field simulation models that cover a range of subsurface uncertainties providing confidence that the CO2 plume stays below 800 mTVDss (metres true vertical depth sub sea) within the storage complex for more than 1000 years after injection ceases. The results of the modelling show that it could be feasible to inject 800 000 tonnes CO2 per annum over 30 years into the storage complex. Modelling studies shows that the main factors controlling CO2 plume migration are trapped gas saturation and the solubility of CO2 in brine.

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McDougall, Bryn K., and Goen E. Ho. "A Study of the Eutrophication of North Lake, Western Australia." Water Science and Technology 23, no. 1-3 (January 1, 1991): 163–73. http://dx.doi.org/10.2166/wst.1991.0412.

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North Lake is an urban freshwater wetland, and like other wetlands in the Perth metropolitan region, Western Australia, has become nutrient enriched, with the accompanying problems of algal blooms, decay, odour, infestation with midges and aesthetic deterioration. A study of the water quality of the lake was undertaken to quantify the variation of phosphorus, nitrogen and chlorophyll-a, and the sediments store of nutrients and their release with pH. The dominant algae in the lake, Microcystis, was found to be limited in growth by nitrogen because of the high availability of phosphorus (> 0.1 mg/l), and likely by light because of self-shading (chlorophyll-a > 0.3 mg/l). Sediments released a substantial amount of nutrients as pH rose above 8.5. Together with a parallel study of the nutrient budget of the lake, a management strategy has been derived to overcome the problem of nutrient enrichment that could be applied to other wetlands in the metropolitan region.

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Hingee, Kassel, Peter Caccetta, Louis Caccetta, Xiaoliang Wu, and Drew Devereaux. "DIGITAL TERRAIN FROM A TWO-STEP SEGMENTATION AND OUTLIER-BASED ALGORITHM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (June 9, 2016): 233–39. http://dx.doi.org/10.5194/isprs-archives-xli-b3-233-2016.

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We present a novel ground filter for remotely sensed height data. Our filter has two phases: the first phase segments the DSM with a slope threshold and uses gradient direction to identify candidate ground segments; the second phase fits surfaces to the candidate ground points and removes outliers. Digital terrain is obtained by a surface fit to the final set of ground points. We tested the new algorithm on digital surface models (DSMs) for a 9600km2 region around Perth, Australia. This region contains a large mix of land uses (urban, grassland, native forest and plantation forest) and includes both a sandy coastal plain and a hillier region (elevations up to 0.5km). The DSMs are captured annually at 0.2m resolution using aerial stereo photography, resulting in 1.2TB of input data per annum. Overall accuracy of the filter was estimated to be 89.6% and on a small semi-rural subset our algorithm was found to have 40% fewer errors compared to Inpho’s Match-T algorithm.

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Hingee, Kassel, Peter Caccetta, Louis Caccetta, Xiaoliang Wu, and Drew Devereaux. "DIGITAL TERRAIN FROM A TWO-STEP SEGMENTATION AND OUTLIER-BASED ALGORITHM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (June 9, 2016): 233–39. http://dx.doi.org/10.5194/isprsarchives-xli-b3-233-2016.

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We present a novel ground filter for remotely sensed height data. Our filter has two phases: the first phase segments the DSM with a slope threshold and uses gradient direction to identify candidate ground segments; the second phase fits surfaces to the candidate ground points and removes outliers. Digital terrain is obtained by a surface fit to the final set of ground points. We tested the new algorithm on digital surface models (DSMs) for a 9600km2 region around Perth, Australia. This region contains a large mix of land uses (urban, grassland, native forest and plantation forest) and includes both a sandy coastal plain and a hillier region (elevations up to 0.5km). The DSMs are captured annually at 0.2m resolution using aerial stereo photography, resulting in 1.2TB of input data per annum. Overall accuracy of the filter was estimated to be 89.6% and on a small semi-rural subset our algorithm was found to have 40% fewer errors compared to Inpho’s Match-T algorithm.

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Michael, Pippa J., Kathryn J. Steadman, and Julie A. Plummer. "Limited ecoclinal variation found in Malva parviflora (small-flowered mallow) across the Mediterranean-climatic agricultural region of Western Australia." Australian Journal of Agricultural Research 57, no. 7 (2006): 823. http://dx.doi.org/10.1071/ar05187.

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Malva parviflora L. populations were collected from 24 locations across the Mediterranean–climatic agricultural region of Western Australia and grown in Perth in a common garden experiment. Seventeen morphometric and taxonomic measurements were taken and genetic variation was investigated by performing principal components analysis (PCA). Taxonomic measurements confirmed that all plants used in the study were M. parviflora. Greater variation occurred within populations than between populations. Separation between populations was only evident between northern and southern populations along principal components 2 (PC2), which was due mainly to flowering time. Flowering time and consequently photoperiod were highly correlated with latitude and regression analysis revealed a close relationship (r2 = 0.6). Additionally, the pollination system of M. parviflora was examined. Plants were able to self-pollinate without the need for external vectors and the pollen–ovule ratio (31 ± 1.3) revealed that M. parviflora is most likely to be an obligate inbreeder with a slight potential for outcrossing. The limited variation of M. parviflora enhances the likelihood of suitable control strategies being effective across a broad area.

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Hall, Lisa, Emmanuelle Grosjean, Irina Borissova, Chris Southby, Ryan Owens, George Bernardel, and Cameron Mitchell. "Petroleum systems analysis of the northern Houtman Sub-basin." APPEA Journal 57, no. 2 (2017): 755. http://dx.doi.org/10.1071/aj16026.

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Interpretation of newly acquired seismic data in the northern Houtman Sub-basin (Perth Basin) suggests the region contains potential source rocks similar to those in the producing Abrolhos Sub-basin. The regionally extensive late Permian–Early Triassic Kockatea Shale has the potential to contain the oil-prone Hovea Member source interval. Large Permian syn-rift half-graben, up to 10 km thick, are likely to contain a range of gas-prone source rocks. Further potential source rocks may be found in the Jurassic–Early Cretaceous succession, including the Cattamarra Coal Measures, Cadda shales and mixed sources within the Yarragadee Formation. This study investigated the possible maturity and charge history of these different source rocks. A regional pseudo-3D petroleum systems model was constructed using new seismic interpretations. Heat flow was modelled using crustal structure and possible basement composition determined from potential field modelling, and subsidence analysis was used to investigate lithospheric extension through time. The model was calibrated using temperature and maturity data from nine wells in the Houtman and Abrolhos sub-basins. Source rock properties are assigned based on an extensive review of total organic carbon, Rock Eval and kinetic data for the offshore northern Perth Basin. Petroleum systems analysis results show that Permian, Triassic and Early Jurassic source rocks may have generated large cumulative volumes of hydrocarbons across the northern Houtman Sub-basin, whereas the Middle Jurassic–Cretaceous sources remain largely immature. However, the timing of hydrocarbon generation and expulsion with respect to trap formation and structural reactivation is critical for the successful development and preservation of hydrocarbon accumulations.

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Ashcroft, Linden Claire, Alexandre Bernardes Pezza, and Ian Simmonds. "Cold Events over Southern Australia: Synoptic Climatology and Hemispheric Structure." Journal of Climate 22, no. 24 (December 15, 2009): 6679–98. http://dx.doi.org/10.1175/2009jcli2997.1.

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Abstract Cold events (CEs) are an important feature of southern Australian weather. Unseasonably cold conditions can have a significant impact on Australia’s agricultural industry and other aspects of society. In this study the bottom 0.4% of maximum temperatures in Melbourne and Perth from the 1958–2006 period are defined as CEs, representing the large-scale patterns affecting most of extratropical Australia. Compiling 6-hourly progressions of the tracks of the cyclones and anticyclones that are geostrophically associated with CEs gives for the first time a detailed synoptic climatology over the area. The anticyclone tracks display a “cloud” of high density across the Indian Ocean, which is linked, in the mean, to weak but significant negative SST anomalies in the region. The cyclone tracks display much variability, with system origins ranging from subpolar to tropical. Several CEs are found to involve tropical and extratropical interaction or extratropical transition of originally tropical cyclones (hurricanes). CE-associated systems travel farther and exhibit longer life spans than similar, non-CE systems. Upper-level analyses indicate the presence of a wave train originating more than 120° west of the CE. This pattern greatly intensifies over the affected area in conjunction with a merging of the subpolar and subtropical jets. The upper-level wave train is present up to five days before the CE. The absence of large orographic features in Australia highlights the importance of wave amplification in CE occurrence. No consistent trend in CE intensity over the period is found, but a significant negative trend in event frequency is identified for both Melbourne and Perth.

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Perugia, Francesca. "Translating housing affordability policies and planning reforms in housing stock: the missed opportunity for the Perth metropolitan region (WA)." Australian Planner 54, no. 4 (October 2, 2017): 203–14. http://dx.doi.org/10.1080/07293682.2018.1477811.

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Lobb, Richard. "The many benefits of working in a rural school. A teacher's journey." Australian and International Journal of Rural Education 30, no. 1 (April 7, 2020): 82–84. http://dx.doi.org/10.47381/aijre.v30i1.273.

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Teaching in a regional or remote setting brings many benefits and rewards. There are of course the intrinsic rewards associated with making a real difference to student learning, and there are also the lifelong friendships that are forged from living and working in a small and friendly community. For many, including Paul Natale, another benefit that can be added to this list is being provided with the opportunity to work in senior leadership roles from a very early career stage. Paul moved to Newman, a mining town in a remote part of Western Australia's Pilbara region six years ago. Paul took a different path to that of his colleagues to get to where he is today, but hasn't looked back since moving from Perth to Newman, and is in no rush to leave anytime soon.

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Strong, Rowan. "Anglicanism and Sanctity: The Diocese of Perth and the Making of a ‘Local Saint’ in 1984." Studies in Church History 47 (2011): 390–402. http://dx.doi.org/10.1017/s0424208400001108.

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On 23 February 1984, the bishops of the Anglican Province of Western Australia signed and sealed a document promulgating the Venerable John Ramsden Wollaston a local saint and hero of the Anglican Communion in accordance with Resolutions 77–80 of the Lambeth Conference 1958. These four resolutions had allowed national or provincial Anglican Churches to add to the Calendar of the Saints to permit ‘supplementary commemorations for local use’ according to the following principles where they were extra-scriptural persons. They had to be individuals ‘whose historical character and devotion are beyond doubt’; ‘revisions should be few and without controversy’; and such additions ‘should normally result from a wide-spread desire expressed in the region concerned over a reasonable period of time’.

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Falvey, D. A., P. A. Symonds, J. B. Colwell, J. B. Willcox, J. F. Marshall, P. E. Williamson, and H. M. J. Stagg. "AUSTRALIA'S DEEPWATER FRONTIER PETROLEUM BASINS AND PLAY TYPES." APPEA Journal 30, no. 1 (1990): 239. http://dx.doi.org/10.1071/aj89015.

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Vast areas of Australia's continental margin sedimentary basins lying seawards of the 200 m water depth line, or shelf edge, are under-explored for petroleum. Indeed, most are essentially unexplored. However, recent advances in drilling and production technology, as well as recent reconnaissance seismic, geochemical, geothermal and seabed sampling data collected by the Bureau of Mineral Resources' (BMR) Marine Division, may reduce the perceived economic risk of many of these deepwater basins relative to their shelf counterparts. Triassic reefs have been identified off the northern Exmouth Plateau and possibly in the deepwater Canning Basin, locally within a predicted oil window. In the deepwater North Perth Basin, major wrench structures have been identified. The deepwater areas of the Great Australian Bight and Otway Basin are actually the main depocentres of a major basin complex lying along the almost totally unexplored southern Australian continental margin. The Latrobe Group in the outer Gippsland Basin is likely to have similar geology to the well explored and productive shelf basin, but remains untested. The Queensland and Townsville troughs, in deepwater off northeast Australia, contain many significant structures typical of unbreached rift systems.All these areas have been risked relative to each other and their prospectivity assessed. The most attractive frontier areas in terms of relative risk may be the Otway and North Perth basins. The highest potential may occur in the deepwater rift troughs off northeast Australia, although the relative risk is very high. Triassic reefs of the Northwest Shelf may have the best prospectivity in the shorter term, given that they are known from drilling in a region with proven source potential and a substantial exploration infrastructure.

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E. May, J., and B. E. Heterick. "Effects of the coastal brown ant Pheidole megacephala (Fabricius), on the ant fauna of the Perth metropolitan region, Western Australia." Pacific Conservation Biology 6, no. 1 (2000): 81. http://dx.doi.org/10.1071/pc000081.

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This paper reports on the apparent displacement of native and exotic ants from gardens in the Perth Metropolitan region by the coastal brown ant (Pheidole megacephala (Fabricius)). Twelve gardens were sampled, four with P. megacephala present, and eight (the controls) where the ant was judged to be absent. Eight out of the 26 ant species recorded (including the coastal brown ant) were introduced. Ninety-two per cent of pitfall trap contents comprised the four most abundant species: P. megacephala, lridomyrmex chasei (Forel), Tetramorium simillimum (F. Smith) and Paratrechina ?obscura (Mayr). Three of the four P. megacephala-dominated gardens were depauperate of almost all other ant species. The fourth P. megacephala-infested garden had a relatively small number of coastal brown ants (104), and the highest number of ant species was found in that garden. The removal of this outlier garden left an average range of one to three species for the other three P. megacephala-infested gardens. Control gardens had between five and 12 ant species. Total ant abundance ranged from an average of 1 027 per P. megacephala-infested garden (increasing to 1 171 if the outlier garden is removed) to 146 at control gardens. There was a significant difference both in ant richness and ant abundance between the controls and P. megacephala-infested gardens (P < 0.05). This remained the case when figures for coastal brown ants were excluded from calculations.

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Herath, Sujeewa Malwila, Priyantha Ranjan Sarukkalige, and Van Thanh Van Nguyen. "A spatial temporal downscaling approach to development of IDF relations for Perth airport region in the context of climate change." Hydrological Sciences Journal 61, no. 11 (June 2, 2016): 2061–70. http://dx.doi.org/10.1080/02626667.2015.1083103.

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Vanpé, C., E. Buschiazzo, J. Abdelkrim, G. Morrow, S. C. Nicol, and N. J. Gemmell. "Development of microsatellite markers for the short-beaked echidna using three different approaches." Australian Journal of Zoology 57, no. 4 (2009): 219. http://dx.doi.org/10.1071/zo09033.

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We used three different methods, size-selected genomic library, cross-species amplification of a mammal-wide set of conserved microsatellites and genomic sequencing, to develop a panel of 43 microsatellite loci for the short-beaked echidna (Tachyglossus aculeatus). These loci were screened against 13 individuals from three different regions (Tasmania, Kangaroo Island, Perth region), spanning the breadth of the range of the short-beaked echidna. Nine of the 43 tested loci amplified reliably, generated clear peaks on the electropherogram and were polymorphic, with the number of alleles per locus ranging from two to eight (mean = 3.78) in the individuals tested. Polymorphic information content ranged from 0.16 to 0.78, and expected heterozygosity ranged from 0.19 to 0.84. One of the nine microsatellites showed a heterozygote deficit, suggesting a high probability of null alleles. The genomic sequencing approach using data derived from the Roche FLX platform is likely to provide the most promising method to develop echidna microsatellites. The microsatellite markers developed here will be useful tools to study population genetic structure, gene flow, kinship and parentage in Tachyglossus sp. and potentially also in endangered Zaglossus species.

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Kelobonye, Keone, Feng Mao, Jianhong Xia, Mohammad Swapan, and Gary McCarney. "The Impact of Employment Self-Sufficiency Measures on Commuting Time: Case Study of Perth, Australia." Sustainability 11, no. 5 (March 11, 2019): 1488. http://dx.doi.org/10.3390/su11051488.

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The level of commuting in cities is an important indicator of the efficiency of urban spatial structure. Recent research has come out in support of land use policies that promote balancing the number of employment opportunities and residents in local geographical units to reduce excess commuting. This study explores three employment self-sufficiency indices: job-worker balance (JWB), employment self-sufficiency (ESS) and employment self-containment (ESC), as measures for reducing the level of commuting. Using the case of Perth, Western Australia, we perform a trip-based evaluation of these three variables and investigate their effect on commuting time through statistical correlation. The results reveal that JWB, ESS and ESC levels are relatively poor across the metropolitan region. Higher ESS correlates with lower inflow travel time, but better JWB and higher ESC do not necessarily lead to shorter travel times. The findings of this study suggest that policies solely relying on these measures may not be effective in reducing commuting times. ESS and ESC do not account for the component of the trip outside the zone, which can misrepresent the level of commuting in an area. Incorporating travel time in these measures can complement their reliability, and better represent overall commuting levels within an urban structure.

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Journal articles on the topic 'Perth Region'

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