Multivariate statistical analysis of songs of the male Common Blackbird (Turdus merula) : An example from western Victoria, Australia
- Authors: Kentish, Barry , Harvey, Jack , Roberts, Lyn , Ross, Jason
- Date: 2001
- Type: Text , Journal article
- Relation: EMU Vol. 101, no. 4 (2001), p. 335-340
- Full Text:
- Reviewed:
- Description: Variation in the song of the male Common Blackbird was investigated within and between two locations in western Victoria. Each of 400 phrases (100 phrases per male) was characterised by 61 measurements relating to 13 aspects of each phrase. Principal component and stepwise discriminant analyses were undertaken on these measurements. Classification of blackbird song for location and individuality was based on timing within the phrase of the loudest elements. Evidence was found for within-phrase variability, with the greatest variation in the middle of the phrase. Within- and between-site comparison found that blackbird song exhibited both individual and site-specific characteristics consistent with earlier suggestions of phrase sharing within local populations. The study demonstrated that an objective statistical approach to song analysis was able to disciminate between individual birds from different locations.
Who's doing the hunting and gathering? An exploration of gender segmentation of adult learning in small remote communities
- Authors: Golding, Barry
- Date: 2004
- Type: Text , Book chapter
- Relation: Equity in Vocational Education and Training: Research reading Chapter 17 p. 225-241
- Full Text: false
- Reviewed:
- Description: Adults in Australia have tended to return relatively recently to learning in patterns that are significantly different by gender. These patterns of gender segmentation for adults are particularly noticeable in the findings of recent research by the author into adult, community and vocational learning in small and remote towns in Victoria. The issues associated with such patterns form the basis of this exploratory paper.
- Description: B1
- Description: 2003000772
13 days and counting : A mutual support model for young, homeless women in crisis
- Authors: Green, Rosemary , Mason, Robyn , Ollerenshaw, Alison
- Date: 2004
- Type: Text , Journal article
- Relation: Youth Studies Australia Vol. 23, no. 2 (2004), p. 46-50
- Full Text:
- Reviewed:
- Description: An innovative program in rural Victoria matches young homeless women with older homeless women and provides them with a range of support services.The result is more stability in the accommodation setting, mutual benefit and satisfaction for clients, and impressive rates of permanent housing outcomes.
- Description: C1
- Description: 2003000964
Isolation, identification, and characterisation of beer-spoilage lactic acid bacteria from microbrewed beer from Victoria, Australia
- Authors: Menz, Garry , Andrighetto, Christian , Lombardi, Angiolella , Corich, Viviana , Aldred, Peter , Vriesekoop, Frank
- Date: 2010
- Type: Text , Journal article
- Relation: Journal of the Institute of Brewing Vol. 116, no. 1 (2010), p. 14-22
- Full Text: false
- Reviewed:
- Description: Lactic acid bacteria are the most frequently encountered beer-spoilage bacteria, and they may render beer undrinkable due to the production of lactic acid, diacetyl, and turbidity. Micro-brewed beer is typically sold unpasteurised, leaving it more susceptible to spoilage by lactic acid bacteria. In this study, the incidence of lactic acid bacteria in bottled microbrewed beer from Victoria, Australia was investigated. A total of 80 beers from 19 breweries were screened for lactic acid bacteria. Almost 30% contained culturable lactic acid bacteria, and many had lactic acid levels well above the flavour threshold. Ethanol, hops, and the pH levels of the beers were not predictors for spoilage in the beers examined, and contamination appeared to be more closely linked to the source brewery. The 45 lactic acid strains isolated from these beers were identified by RAPD-PCR, with Lactobacillus brevis being the most frequently isolated species. All isolates were capable of spoiling beer and contained putative hop resistance genes. At typical beer levels, pH and ethanol had no effect on the growth of the particular spoilage bacteria isolated in this study. © 2010 The Institute of Brewing & Distilling.
- Description: 2003008145
A diverse pleistocene marsupial trackway assemblage from the Victorian Volcanic Plains, Australia
- Authors: Carey, Stephen , Camens, Aaron , Cupper, Matthew , Grun, Rainer , Hellstrom, John , McKnight, Stafford , McLennan, Iain , Pickering, David , Trusler, Peter , Aubert, Maxime
- Date: 2011
- Type: Text , Journal article
- Relation: Quaternary Science Reviews Vol. 30, no. 5-6 (2011), p. 591-610
- Full Text: false
- Reviewed:
- Description: A diverse assemblage of late Pleistocene marsupial trackways on a lake bed in south-western Victoria provides the first information relating to the gaits and morphology of several megafaunal species, and represents the most speciose and best preserved megafaunal footprint site in Australia. The 60-110 ka volcaniclastic lacustrine sedimentary rocks preserve trackways of the diprotodontid Diprotodon optatum, a macropodid (probably Protemnodon sp.) and a large vombatid (perhaps Ramsayia magna or '. Phascolomys' medius) and possible prints of the marsupial lion, Thylacoleo carnifex. The footprints were imprinted within a short time period, demonstrating the association of the taxa present, rather than the time-averaged accumulations usually observed in skeletal fossil deposits. Individual manus and pes prints are distinguishable in some trackways, and in many cases some digital pad morphology is also present. Several parameters traditionally used to differentiate ichnotaxa, including trackway gauge and the degree of print in-turning relative to the midline, are shown to be subject to significant intraspecific variation in marsupials. Sexual dimorphism in the trackway proportions of Diprotodon, and its potential for occurrence in all large bodied, quadrupedal marsupials, is identified here for the first time. © 2010 Elsevier Ltd.
Macroinvertebrate communities in willow (Salix spp.) and reed beds (Phragmites australis) in central Victorian streams in Australia
- Authors: Jayawardana, Chandamali , Westbrooke, Martin , Wilson, Michael , Hurst, Cameron
- Date: 2006
- Type: Text , Journal article
- Relation: Marine and Freshwater Research Vol. 57, no. 4 (2006), p. 429-439
- Full Text: false
- Reviewed:
- Description: Exotic willows (Salix spp.) are widespread riparian tree species of rivers in temperate Australia and New Zealand. Despite being considered as a weed of national significance, little is known about the habitat value of willows and the impact on aquatic biota of vegetation change following willow management programmes. Macroinvertebrate fauna in root habitats of willows and Phragmites australis habitats were examined in three central Victorian rivers to understand the effect of such littoral habitat changes on macroinvertebrates. Data were analysed using Partially Nested Factorial ANOVA with season, river and habitat as main effects. Habitat structure had a significant effect (P < 0.05) on macroinvertebrate community assemblage. However, effect of habitat was not consistent among seasons. The greatest community differences among habitats were observed during winter and least separation during autumn. Taxa responsible for community differences among habitats were also identified. Species richness and abundance did not show consistent variation among habitats over different rivers or seasons. This study provided some indication of the macroinvertebrate community changes that would take place in situations where riparian vegetation changes takes place from willows to P. australis. © CSIRO 2006.
- Description: C1
- Description: 2003001620
Strangers in a strange land : Converging and accommodating Celtic identities in Ballarat 1851-1901
- Authors: Croggon, Janice
- Date: 2002
- Type: Text , Thesis , PhD
- Full Text:
- Description: "This thesis examines the paths by which four Celtic ethnic identities, Cornish, Welsh, Scottish and Irish, responded to the specific society and culture of the Victorian goldfields between 1850-1901. The individual Celtic groups intersected, harmonised and contested with each other in a process through which they retained their identities and yet managed to move towards becoming part of a larger, more-encompassing unity."
- Description: Doctor of Philosophy
Cancer incidence and soil arsenic exposure in a historical gold mining area in Victoria, Australia : A geospatial analysis
- Authors: Pearce, Dora , Dowling, Kim , Sim, Malcolm
- Date: 2012
- Type: Text , Journal article
- Relation: Journal of Exposure Science and Environmental Epidemiology Vol. 22, no. 3 (2012), p. 248-257
- Full Text:
- Reviewed:
- Description: Soil and mine waste around historical gold mining sites may have elevated arsenic concentrations. Recent evidence suggests some systemic arsenic absorption by residents in the goldfields region of Victoria, Australia. Victorian Cancer Registry and geochemical data were accessed for an ecological geographical correlation study, 1984-2003. Spatial empirical Bayes smoothing was applied when estimating standardised incidence ratios (SIRs) for cancers in 61 statistical local areas. The derived soil arsenic exposure metric ranged from 1.4 to 1857 mg/kg. Spatial autoregressive modelling detected increases in smoothed SIRs for all cancers of 0.05 (95% confidence interval (CI), 0.02-0.08) and 0.04 (0.01-0.07) per 2.7-fold increase in the natural log-transformed exposure metric for males and females, respectively, in more socioeconomically disadvantaged areas; for melanoma in males (0.05 (0.01-0.08) adjusted for disadvantage) and females (0.05 (0.02-0.09) in disadvantaged areas). Excess risks were estimated for all cancers (relative risk 1.21 (95% CI, 1.15-1.27) and 1.08 (1.03-1.14)), and melanoma (1.52 (1.25-1.85) and 1.29 (1.08-1.55)), for males and females, respectively, in disadvantaged areas in the highest quintile of the exposure metric relative to the lowest. Our findings suggest small but significant increases in past cancer risk associated with increasing soil arsenic in socioeconomically disadvantaged areas and demonstrate the robustness of this geospatial approach. Journal of Exposure Science and Environmental Epidemiology advance online publication, 21 March 2012.
Two narratives within D & T education in secondary schools across Victoria
- Authors: Brown, Michael
- Date: 2008
- Type: Text , Conference paper
- Relation: Paper presented at 5th Biennial International Conference on Technology Education Research 'Exploring Technology Education: Solutions to issues in a Globalised World', Crowne Plaza Hotel, Gold Coast, Queensland : 27th - 29th November 2008 p. 45-55
- Full Text: false
- Description: 2003006827
Social impacts of water restrictions : Householders in the Ballarat water supply system
- Authors: Harman, Jessie , Lynch, David , McEachern, Steven
- Date: 2008
- Type: Text , Conference paper
- Relation: Paper presented at Water Down Under Conference 2008, Adelaide, South Australia : 14th-17th April 2008 p. 2028-2041
- Full Text: false
- Description: In this paper, researchers investigate the social impact of water restrictions on households in the Ballarat and District Water Supply System. They present a general framework for evaluating the social impact of water restrictions which centres on perceptions of economic circumstances, health and well-being and community character and cohesion. Using qualitative and quantitative research methods, researchers confirm that existing water restrictions are indeed having an impact, although the extent of that impact varies along key dimensions. Researchers also identify underlying drivers of attitudes towards water restrictions, namely the direct impact of water restrictions on the household, and beliefs regarding the equitable application of restrictions across the community. The research findings are significant at a number of levels. At the local level, they provide water resource practitioners and policy makers with systematic data on which to base future water resource decisions and the communication messages and support strategies that accompany such decisions. More broadly, the findings shed light on an issue of critical national importance and they contribute to our theoretical knowledge of its impacts and complexities, and strategies for measurement.
- Description: 2003006302
Seasonal and interannual variations in diatom assemblages in Murray River connected wetlands in north-west Victoria, Australia
- Authors: Gell, Peter , Sluiter, Ian , Fluin, J.
- Date: 2002
- Type: Text , Journal article
- Relation: Marine and Freshwater Research Vol. 53, no. 6 (2002), p. 981-992
- Full Text:
- Description: Epipelic diatom assemblages collected from three wetlands connected to the Murray River displayed considerable variation in response to flooding and drying phases. Murray River water input usually generated diatom assemblages dominated by Aulacoseira species. After isolation, the diatom flora of two wetlands shifted to assemblages of small Fragilariaceae forms. Elevated nutrient levels corresponded with the appearance of eutraphentic taxa such as Cyclotella meneghiniana, Eolimna subminuscula, Luticola mutica and Nitzschia palea. Further evapoconcentration induced shifts to taxa tolerant of elevated salinity levels including Amphora coffeaeformis, Navicula incertata, Staurophora salina and Tryblionella hungarica. Ordination analyses reveal a strong chemical control on the diatom taxa present in the wetlands, in accordance with known ecological preferences for salinity and nutrients. The influence of nitrogen and phosphorus concentrations in controlling diatom assemblages was subordinate to salinity once conductivity values exceeded 1400 μS cm–1. The results of such biomonitoring provide a means of interpreting wetland history from fossil assemblages contained in sediment sequences.
Increasing incidence of hospitalisation for sport-related concussion in Victoria, Australia
- Authors: Finch, Caroline , Clapperton, Angela , McCrory, Paul
- Date: 2013
- Type: Text , Journal article
- Relation: Medical Journal of Australia Vol. 198, no. 8 (2013), p. 427-430
- Relation: http://purl.org/au-research/grants/nhmrc/565900
- Full Text: false
- Reviewed:
- Description: Objective: To describe trends in hospitalisation for sport-related concussion. Design, setting and patients: Analysis of routinely collected hospital admissions data from all Victorian hospitals (public and private) over the 2002-03 to 2010-11 financial years for patients aged ≥15 years with a diagnosis of concussion and an ICD-10-AM external cause activity code indicating sport. Main outcome measures: Number and cost of hospitalisations; rate of hospitalisation per 100000 participants overall and for specific sports; and percentage change in frequency and hospitalisation rate per 100000 participants over 9 years. Results: There were 4745 hospitalisations of people aged ≥15 years for sport-related concussion, with a total hospital treatment cost of $17944799. The frequency of hospitalisation increased by 60.5% (95% CI, 41.7%-77.3%) over the 9 years, but could only partially be explained by increases in sports participation, as the rate per 100000 participants also increased significantly, by 38.9% (95% CI, 17.5%-61.7%). After adjustment for participation, rates were highest for motor sports, equestrian activities, Australian football, rugby and roller sports. The greatest significant increases in rates were seen in roller sports, rugby, soccer and cycling. Conclusions: The frequency and participation-adjusted rate of hospitalisation for sport-related concussion, both overall and across several sports, increased significantly over the 9 years. These findings, along with high levels of public concern, make prevention of head injury in sport a population health priority in Australia.
- Description: 2003011025
Place attachment, sense of belonging and identity in life history narratives of Iranian Baha'i refugees
- Authors: Williams, Ruth
- Date: 2009
- Type: Text , Journal article
- Relation: Baha'i Studies Review Vol. 15, no. 1 (2009), p. 3-18
- Full Text: false
- Reviewed:
- Description: Refugees commonly experience physical and emotional displacement. Such experiences reflect Tuan's theories relating to the anxiety of separation from home and sense of estrangement or alienation in a new land. Despite this adversity, many refugees ultimately form hybrid or trans-national identities, which allow them to operate and be accepted in two (or more) cultures. This facilitates a sense of belonging and the adaptation process to a new country and culture. The Baha'i Faith is considered to be the second most globally widespread religion after Christianity. Thus, refugees can potentially join a community anywhere in the world and be provided with a sense of familiarity, which the commonality of values and administrative structure provides. In addition, newcomers arriving in a new land are automatically affiliated to a collective identity to which they already belong. This paper draws on case study and secondary source evidence to argue that the refugee participants in this study have used the Baha'i writings, international administrative structure and global community, to construct and maintain a notion of home and sense of belonging, and thus ultimately reflect a hybrid or trans-national identity in a new land. Preliminary findings indicate that religion plays a vital role in the lives of these refugees as the central tenets of the Baha'i Faith appear to actively inform the resettlement process in a new country. Life history narratives were used as a tool for analysis in seven in-depth case study interviews with Iranian Baha'i refugees residing in and around the city of Melbourne, in the state of Victoria, Australia. The participants in this study indicated that social space gave them the strongest sense of belonging, rather than place attachment. Religious identity is explored through the affiliation to a collective membership, as it is within this context that religious identity can be strengthened via official and legitimate recognition or undermined via persecution. Collective identity on a macro scale can be associated with nationalism and trans-nationalism. The Baha'i attitude to nationalism is to afford a country its rightful respect, but discourage extreme nationalism as it is characteristically exclusionary by nature. However, the Iranian Baha'i refugees in this study identify primarily as Baha'i rather than Iranian or Australian; that is, the values under-pinning their religion outweighed the importance of place or national identity. The participants in this study embraced the notion of a global home and considered themselves citizens of the world, consequently adopting trans-national and hybrid identities. This attitude ultimately impacts on the adaptation of refugees to a new country, as they do not see themselves as moving from one home to another, but merely relocating to a different part of the one global home. (Author abstract).
Priority setting in primary health care : A framework for local catchments
- Authors: McDonald, John , Ollerenshaw, Alison
- Date: 2011
- Type: Text , Journal article
- Relation: Rural and remote health Vol. 11, no. 2 (2011), p. 1714
- Full Text: false
- Reviewed:
- Description: Managers and staff in primary health care partnerships in local catchments, particularly in regional areas, are periodically required to work collaboratively to set health priorities. Setting priorities involves making decisions about which health needs are most important and what programs will be funded to address them. There is no universally agreed set of decision-making rules for setting priorities. Dominant approaches prioritise health economics, and have favoured expert knowledge drawn from technical-rational methodologies rather than consumer involvement and community action. However, research reveals that setting priorities is a complex, value laden, contested process buffeted by competing objectives and political interests. As such, an interdisciplinary, collaborative approach is called for. Using reflective practice from a priority setting project for a primary care partnership in a local, regional catchment in Victoria, Australia, a conceptual framework for priority setting is presented that identifies 13 interconnected factors spanning economic, political, policy, epidemiological, moral, evidentiary and evaluative domains. This interdisciplinary framework extends current knowledge about the considerations and trade-offs in setting priorities among collaborating primary health care agencies. It offers a potentially valuable heuristic tool for healthcare decision-makers in rural areas.
Biology, affinity and description of an unusual aquatic new genus and species of isotomidae (collembola) from high altitude lakes in Tasmania
- Authors: Greenslade, Penelope , Potapov, Mikhail
- Date: 2015
- Type: Text , Journal article
- Relation: European Journal of Entomology Vol. 112, no. 2 (2015), p. 334-343
- Full Text: false
- Reviewed:
- Description: A new species of Isotomidae (Collembola) was collected from submerged stones on the edge of nine lakes on Tasmania's Central Highland Plateau. Because it did not comply fully with the characters of any existing genus, a new genus, Chionobora gen. n. is erected for it here. An Antarctic species, Desoria klovstadi (Carpenter), has characters which conform with the new genus so is formally transferred to the new genus here. The Antarctic Continent and Tasmania were last in proximity 60 million years b.p. so it is suggested both species are relicts persisting in probable ice-free refugia during glacial cycles. Gut contents of specimens of the new species exclusively contained diatoms in various stages of digestion and the species appears to graze on aquatic macrophytes, a feeding habit not recorded before for Collembola. We note the high numbers of endemic invertebrate taxa of restricted distributions in cold habitats of southern regions compared to warmer regions and stress their conservation values and threats to their populations.
Maremma guardian dogs to protect Little Penguins
- Authors: Wallis, Robert , Wallis, Anne , Corbett, Patricia
- Date: 2019
- Type: Text , Journal article
- Relation: International Pest Control Vol. 61, no. 4 (2019), p. 196-197
- Full Text:
- Reviewed:
- Description: The Red Fox (Vulpes vulpes) is a major pest in Australia, especially in its predation of so called 'critical weight range' (35-5500g) mammals. the fox is an introduced species that can also cause serious declines in bird numbers, often killing many more than they need to eat.
An orphan's escape : Memories of a lost childhood
- Authors: Golding, Frank
- Date: 2005
- Type: Text , Book
- Full Text: false
- Reviewed:
- Description: As late as 1961, nearly seven thousand children were in the custody of Victorian institutions or under the care of the Children's Welfare Department. Many of them were institutionalised simply because they had been born out of welock; more than half were admitted because of so-called 'neglect'. This is what happened to Frank Golding and his two brothers. On Christmas Eve 1940, the boys - Frank (not yet three), Bob (four), and Bill (six) - found themselves on the doorstep of an orphan asylum. They were certainly not orphans, but the boys spent most of their lost childhood inside the walls of the Ballarat Orphanage. 'An Orphan's Escape' is not just about surviving in the emotional wasteland of state care. It would take Frank fifty years to learn what had been happening 'outside the wall' while he was inside. Where were his parents? Why didn't they come for him? Why wouldn't anyone tell him? Frank's childhood puzzlement lasted half a lifetime. Theirs was by no means the only appalling story of the time. Hundreds of similar stories were told to the Federal Senate Committee's 2004 Inquiry into Children in Institutional Care. His parents rescued him at last, but the battle for their children had been at a huge cost. Files from the welfare department, the army and the police opened up a dark pit that his parents had kept hidden. Although his parents had been irresponsible in the early stages of this saga, 'An Orphan's Escape' reveals that evidence Frank discovered in the files showed they care deeply about their children.
- Description: As late as 1961, nearly seven thousand children were in the custody of Victorian institutions or under the care of the Children's Welfare Department. Many of them were institutionalised simply because they had been born out of welock; more than half were admitted because of so-called 'neglect'. This is what happened to Frank Golding and his two brothers. On Christmas Eve 1940, the boys - Frank (not yet three), Bob (four), and Bill (six) - found themselves on the doorstep of an orphan asylum. They were certainly not orphans, but the boys spent most of their lost childhood inside the walls of the Ballarat Orphanage. 'An Orphan's Escape' is not just about surviving in the emotional wasteland of state care. It would take Frank fifty years to learn what had been happening 'outside the wall' while he was inside. Where were his parents? Why didn't they come for him? Why wouldn't anyone tell him? Frank's childhood puzzlement lasted half a lifetime. Theirs was by no means the only appalling story of the time. Hundreds of similar stories were told to the Federal Senate Committee's 2004 Inquiry into Children in Institutional Care. His parents rescued him at last, but the battle for their children had been at a huge cost. Files from the wefare department, the army and the police opened up a dark pit that his parents had kept hidden. Although his parents had been irresponsible in the early stages of this saga, 'An Orphan's Escape' reveals that evidence Frank discovered in the files showed they care deeply about their children.
VFR travel in practice : Case studies from Victoria, Australia
- Authors: Backer, Elisa
- Date: 2014
- Type: Text , Conference paper
- Relation: 24th Council for Australian Tourism and Hospitality Education Annual Conference; Brisbane, Queensland ; 10th-13th February 2014 ; published in CAUTHE 2014 - Tourism and hospitality in the contemporary world : Trends, changes and complexity p. 44-56
- Full Text: false
- Reviewed:
- Description: Visiting Friends and Relatives (VFR) travel has been highlighted through previous research as being historically ignored and underestimated by both researchers and tourism marketing practitioners. However, a new wave of research may be encouraging an awakening in industry circles as to the economic, social and political benefits. Through three case studies in Victoria, Australia of successful VFR marketing campaigns, the reasons why practitioners have developed such marketing campaigns dedicated to reach and optimise their VFR travel ‘market’ are discussed. In addition, the rationale for such campaigns, and their associated marketing activities along with the measures used to judge their effectiveness are explored. The conclusions outline the common themes and issues from the three case studies, and in particular highlight the need for the campaigns to provide economic, social and political benefits.
Investigations into the ecology and management of the invasive plant Galenia pubescens within the native temperate grasslands of Victoria, Australia
- Authors: Mahmood, Ako
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Plant invasions of natural ecosystems are one of the major threats to the conservation of biological diversity across nearly all biogeographical regions in the world. This thesis focuses on Galenia pubescens (Carpet weed) as a case study of possible approaches to the potential management of environmental weed species. G. pubescens is a woody prostrate perennial plant that is becoming a serious threat to Australian temperate grasslands, surrounding agricultural areas and conservation reserves. It is indigenous to South Africa and was first recorded in Australia in the early 1900s, and it is an aggressive competitor against native species. It is difficult to control, and little information exists about its effects on natural ecosystems, and aspects of its biology and ecology. This study has investigated some important ecological characteristics of G. pubescens’ seeds and has experimented with different management strategies in combination with chemical control. It has also considered the potential for the expansion of the distribution of this species across suitable habitat in Australia under predicted elevated CO2 and drought conditions. Seeds of G. pubescens are shown to be able to germinate over a broad range of temperatures, but short bursts (5 minutes) of high temperatures (80oC to 120oC replicating possible exposures to a fire) reduced seed germination. Seed germination was positively favored by light and declined rapidly in darkness, decreasing by > 80% at a depth of only 0.5 cm in soil. This suggests that fire regimes might be useful in removing mature plants and controlling seed numbers on the surface, and that subsequent native seeding of undisturbed areas may assist in the long-term management of this noxious weed. A trial was conducted to determine the effect of treatment with a plant essential oil (pine oil) to limit the seed germination and seedling emergence of G. pubescens. This trial showed that the effects of pine oil application were significant (P<0.05). Germination was completely inhibited by application of pine oil at 5% or higher concentrations directly to seeds, and seedling emergence was reduced by between 90 and 100% in pot trials. These outcomes demonstrate the potential viability of pine oil as a long-term control option for this species. In field-based experiments, control strategies including herbicide control with glyphosate, organic herbicide control with pine oil, the application of mulch, and the addition of native seeds to the available seedbank (and all possible combinations of these techniques), were tested. The study showed that one single treatment of a G. pubescens infestation without undertaking a secondary treatment is insufficient to control the G. pubescens infestation or to encourage native regeneration, but that a combined strategy, employing all the aforementioned techniques, is more effective. It is however suggested that full regeneration of the area may not be possible unless further restoration programs are instituted after the cycle of G. pubescens’ treatment has been completed. The thesis also assessed the control effects of chemical control combined with a prescribed spring burning. Assessment of the resulting aboveground vegetation of G. pubescens has shown that a combination of chemical control and late-spring burning can reduce the cover of non-native species such as G. pubescens, suggesting that this could be a useful tool in their management. Finally, this study has supported the view that the growth of G. pubescens will be significantly enhanced in a future climate with an enriched atmospheric CO2 concentration. These climatic changes will have important implications for management of this noxious weed in the future.
- Description: Doctor of Philosophy
Assessing productive soil - landscapes in Victoria using digital soil mapping
- Authors: Robinson, Nathan
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Spatial soil information is used to support questions on agriculture and the environment from global to local scales. Historically, soil mapping has been used to inform and guide a multitude of land users with their decisions. Demand for specific spatial soil information is increasing in response from a wider range of users operating across agricultural and environmental domains. To satisfy these demands, users must be provided with practical and relevant spatial soil information. Novel approaches are required to deal with global deficiencies in available soil information. A major limitation to this is the plethora of incongruent legacy data with poor spatial and temporal coverage. This research study initially identifies the specific needs of users for spatial soil information with a focus on the requirements of biophysical modellers. Secondly, error sources that hamper Digital Soil Mapping (DSM) are identified, described and assessed using pH in practical and relevant examples. A final aim is to spatially predict soil properties (e.g. clay mineralogy) that underpin soil chemical behaviour. This is achieved by harmonising legacy data in combination with new spectroscopy techniques and a spatial inference approach. The spatial soil information needs of biophysical modellers in Victoria, Australia were found to be consistent with global needs for information including soil water characteristics, organic carbon and effective rooting depth. To accommodate stochastic and epistemic uncertainties in spatial soil information, uncertainty frameworks proved effective to deal with, and understand the limitations of legacy data in spatial inference models. Robust and reliable spectroscopic models for properties that are linked to functions and services delivered by soil were achieved and used in 3D spatial models. These findings will enable a tactical response through the delivery of pertinent spatial soil information that is contemporary, quality assured and sought by users. Learnings presented should enable producers of spatial soil information to be more comprehensive in their delivery of products that are easy to use, accessible and understood by a growing user community.
- Description: Doctor of Philosphy