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Articles 1 - 30 of 38
Full-Text Articles in Environmental Monitoring
The Effects Of Urban Habitat Fragmentation On The Population Genetic Structure Of The Scincid Lizard Ctenotus Fallens, Jösef Krawiec
The Effects Of Urban Habitat Fragmentation On The Population Genetic Structure Of The Scincid Lizard Ctenotus Fallens, Jösef Krawiec
Theses : Honours
Species occurring in fragmented urban habitats often exhibit low genetic diversity which can be attributed to restricted gene flow and elevated levels of inbreeding. This can have serious implications for the survival of species especially when faced with additional pressures caused by urbanisation. The population genetic structure of the generalist skink Ctenotus fallens was examined within and among three urban vegetation remnants in the Perth metropolitan area in Western Australia, using both microsatellite and AFLP markers. Historic genetic connectivity between the populations of each remnant was shown as well as weak patterns of genetic differentiation which appeared to suggest isolation …
Fuel Characteristics And Dynamics In Shrublands Of The Transitional Rainfall Zone, Western Australia, Sarah Dalgleish
Fuel Characteristics And Dynamics In Shrublands Of The Transitional Rainfall Zone, Western Australia, Sarah Dalgleish
Theses : Honours
Within the Mediterranean shrublands, fires are particularly intensive and widespread. In the Transitional Rainfall Zone in Western Australia, these large fires bum in areas with high conservation value, and present risks to human lives and infrastructure on properties in the region. The concern for the effect fires have on anthropocentric and ecological values in these shrublands makes it a priority in management to reduce the risks. Of the environmental and biotic factors that influence a fire, fuel is one of the most significant as it has the capacity to determine fire prope1iies such as the intensity, extent, bum pattern within …
Impact Of Fire On Geophyte Abundance, Diversity And Composition In The Jarrah Forests Of South-West Western Australia, Jeffry Cargill
Impact Of Fire On Geophyte Abundance, Diversity And Composition In The Jarrah Forests Of South-West Western Australia, Jeffry Cargill
Theses : Honours
Within fire-prone environments, such as the dry sclerophyll forests of south-west Western Australia, species morphology and distributions have established and maintained long-term dynamic relationships with fire regimes. These fire regimes can alter ecosystems, creating spatial and temporal changes in species composition, structure and fuel accumulation at both local and landscape scales. The cessation of Indigenous fire regimes and the establishment and expansion of a fire vulnerable European society produced the need for fire management strategies such as prescribed burning to be implemented to ensure protection of life, property and other values. Concurrent with these human-focused objectives has been the ever-increasing …
Plant Surrogacy: An Evaluation Of Its Use And Application In The Effort To Conserve Ground Dwelling Invertebrates, Kerry Leigh Ironside
Plant Surrogacy: An Evaluation Of Its Use And Application In The Effort To Conserve Ground Dwelling Invertebrates, Kerry Leigh Ironside
Theses : Honours
A study conducted in the Ridges State Forest, Yanchep was designed to investigate the relationship between plant species richness, vegetation association and ground dwelling invertebrate species richness. Four plant communities were sampled at two scales of measurement. Two treatments were located in woodland and two in heath. Within each vegetation association, plant communities that were representative of both high and low species richness were selected. Three invertebrate orders, Araneae, Coleoptera and Araneae were sorted to morphospecies level. Ordinal richness was also investigated. Two-way ANOVAs indicated that there was no relationship between plant species richness, vegetation association· or the interaction between …
Natural Regeneration Of Native Vegetation On Abandoned Agricultural Land In The Fitzgerald Biosphere, Nerilee Boshammer
Natural Regeneration Of Native Vegetation On Abandoned Agricultural Land In The Fitzgerald Biosphere, Nerilee Boshammer
Theses : Honours
Much of the natural landscape in the south-west of Western Australia has been severely modified as a result of past and current agricultural activity. One of the most conspicuous changes has been the large scale clearing of native vegetation, The evidence of the negative impacts of this vegetation removal on the natural environment is now extensive, particularly in the south-west region of the State. In order to prevent further degradation of the landscape of the south-west and subsequent loss of endemic species, strategic revegetation within the agricultural landscape is required. Native vegetation corridors can be established, linking areas of remnant …
Improving Nutrient Management At Lake Joondalup, Western Australia, Through Identification Of Key Sources And Current Trajectories, Michelle Cumbers
Improving Nutrient Management At Lake Joondalup, Western Australia, Through Identification Of Key Sources And Current Trajectories, Michelle Cumbers
Theses : Honours
Eutrophication has become a considerable issue for managers of water bodies across Australia. Rapid urbanisation in the south-west of Western Australia is causing the eutrophication of many wetlands within the region. Lake Joondalup is a eutrophic, urban lake, located approximately 20km north of Perth city. It comprises part of the Yellagonga Regional Park, having a high conservation value. The aim of this study was to provide managers of Lake Joondalup with information on the relative importance of different nutrient sources into the lake, thus enabling the development of appropriate management strategies. Additionally, a historical examination of available water quality data …
Wedge Veg : Gradient Analysis Of Impacts To Coastal Heath Vegetation At Wedge, Western Australia, Steven O'Dwyer
Wedge Veg : Gradient Analysis Of Impacts To Coastal Heath Vegetation At Wedge, Western Australia, Steven O'Dwyer
Theses : Honours
A reliable technique to assess impacts to coastal zones is required as coastal areas across the world are under pressure from an increasing human presence. The result is a greater level of disturbance to the coast, both marine and terrestrial. This study addresses a worldwide problem but is focused to a local scale. Wedge, on the central coast of Western Australia, supports a squatter shack settlement and has done so for approximately 50 years. Over time, the number of shacks, campers, tourists, 4WD's and motorbikes has increased. In recent years this growth has been significant. Management of this area and …
Floristics Of The Banksia Woodlands On The Wallingup Plain In Relation To Environmental Parameters, Claire Mccamish
Floristics Of The Banksia Woodlands On The Wallingup Plain In Relation To Environmental Parameters, Claire Mccamish
Theses : Honours
An understanding of the underlying environmental factors contributing to the floristic composition of Banksia woodlands should improve the effective management of Banksia woodland communities of the Swan Coastal Plain. Although a number of studies have examined the vegetation on the Banksia woodlands on detail there have been few studies aimed at identifying the specific environmental parameters influencing the floristic gradients on the Swan Coastal Plain. A comprehensive local scale study was undertaken on the northern Swan Coastal Plain to determine the environmental correlates influencing floristic communities in an area of Banks/a woodland known as the Wallingup Plain. Vegetation communities of …
Fox Control In Urban Conservation Reserves: An Analysis Of Bait Uptake And Public Perceptions In The Perth Metropolitan Area, Jennifer Jackson
Fox Control In Urban Conservation Reserves: An Analysis Of Bait Uptake And Public Perceptions In The Perth Metropolitan Area, Jennifer Jackson
Theses : Honours
As the world's population becomes increasingly urbanised, the need for people to see nature on their doorstep is becoming more appealing. The city of Perth (Western Australia) has large areas of bushland that have been reserved as conservation estate, and therefore are only minimally modified by urban development. But while many of these urban bushland reserves contribute highly to biodiversity in the form of vegetation, vertebrate surveys have indicated a low diversity of fauna. These areas have the potential to function in a more complete manner as nature reserves with significant conservation value by supporting populations of native animals which …
The Fringing Halophytic Vegetation Of Lake Austin: A Study Of Mining Impacts And Vegetation Dynamics, Simone Vellekoop
The Fringing Halophytic Vegetation Of Lake Austin: A Study Of Mining Impacts And Vegetation Dynamics, Simone Vellekoop
Theses : Honours
Mining operations in arid regions of Western Australia are faced with many environmental management issues. One such issue is the disposal of mine water to the environment. Mine water is commonly discharged to nearby salt lakes under licence by the Department of Environmental Protection. Licence conditions dictate that the discharge water and the receiving environment be monitored to allow impacts on the environment to be detected. Salt lakes are associated with vegetation communities dominated by halophytic members of the Chenopodiaceae, While these plants are tolerant of salinity extremes, the germination stage of many species requires periods of lowered salinity. There …
Invasion Of Indigenous Vegetation In South-Western Australia By Leptospermum Laevigatum (Gaertn.) F. Muell. (Myrtaceae), Anya Lam
Theses : Honours
The current paradigm of biodiversity conservation requires the assessment of alien plant invaders, and their potential negative impacts on indigenous species and communities. Leptospermum laevigatum (Gaertn.) F. Muell. (Victorian tea tree/ Coast tea tree) is indigenous to eastern Australia. It has invaded ecosystems within its natural biogeographic range, within new ranges in Australia and overseas. The species is listed as a high priority weed in the Environmental Weed Strategy for Western Australia. However, the basis for its listing has been casual observation rather than focussed research. This study of L. laevigatum is unique in being the first to …
Abundance, Distribution And Population Characteristics Of Western Grey Kangaroos (Macropus Fuliginosus, Desmarest 1817) In Yellagonga Regional Park, Amy Chang
Theses : Honours
Yellagonga Regional Park is located in the northwest corridor of Perth and constitutes 1400 hectares of wetlands, parkland, open forest and open woodland. Few studies have been conducted on the native fauna in the Park's upland habitats. For this reason, a study of the abundance and distribution of western grey kangaroos (Macropus fuliginosus) was conducted. A walked survey using direct counts and individual recognition of kangaroos during winter, recorded a total of 123 kangaroos, 51 pouch young and 23 unidentified individuals in Yellagonga Regional Park, and a further 24 kangaroos and 18 pouch young at Edith Cowan University's Joondalup campus. …
An Evaluation Of Environmental Disclosures Produced In Australian Local Government Annual Reports, Royston J. Tan
An Evaluation Of Environmental Disclosures Produced In Australian Local Government Annual Reports, Royston J. Tan
Theses : Honours
This thesis is an evaluation of the environmental disclosures published in Australian local governments' annual reports. The study is aimed in identifying disclosures of environmental information by Australian local governments and providing explanations for the variations in the quantity and quality of information disclosed. Various social responsibility theories were used in this study. The theories employed in this study were institutional factors, stakeholder theory, social and political theories. Institutional factors included issues such as local government characteristics and pressures exerted from various government and non·government organizations to implement and disclose environmental measures. A content analysis methodology was used in this …
The Assessment Of Satellite Remote Sensing As A Tool For Determining Sea Surface Temperatures In Nearshore Environments, Fabienne Faskel
The Assessment Of Satellite Remote Sensing As A Tool For Determining Sea Surface Temperatures In Nearshore Environments, Fabienne Faskel
Theses : Honours
The use of satellite remote sensing for environmental management applications has seen a marked increase over the past decade. Remotely sensed data are obtainable for a variety of parameters, such as mineral exploration, species migration, and for determining sea surface temperatures (SSTs). This study examined whether satellite remote sensing is a viable option for determining SSTs in coastal waters, as traditionally this application has only been applied to open-ocean, offshore waters. SSTs in the nearshore waters of Rottnest Island, Western Australia, were determined using in situ temperature loggers and remotely sensed satellite data. Initially the accuracy of the satellite sea …
Adequacy Of Terrestrial Fauna Surveys For The Preparation Of Environmental Impact Assessments In The Mining Industry Of Western Australia [Thesis], Jason L. Fraser
Adequacy Of Terrestrial Fauna Surveys For The Preparation Of Environmental Impact Assessments In The Mining Industry Of Western Australia [Thesis], Jason L. Fraser
Theses : Honours
The Environmental protection Authority has indicated that terrestrial fauna surveys as undertaken for the purpose of preparing Environmental Impact Assessment (EIA) are not providing adequate information to enable decision-makers to assess development impacts on biodiversity and ecosystems. In the absence of a protocol to assess current standards of terrestrial fauna surveys, 'best practice' was defined through discussions held with an 'expert panel', and quantified through a questionnaire. This study examined current standards of terrestrial vertebrate fauna surveys, prepared for the purpose of EIA, with 'best practice' as defined by relevant expert opinion. Strengths and weaknesses of terrestrial fauna surveys were …
Biogeography Of A Changing Landscape: Pipidinny Swamp, Yanchep National Park Western Australia, Bradley W. Boucher
Biogeography Of A Changing Landscape: Pipidinny Swamp, Yanchep National Park Western Australia, Bradley W. Boucher
Theses : Honours
The resources of Pipidinny Swamp were utilised by the Nyoongar Aboriginal people for possibly 40,000 years. Since the late 1800s, the resources of Pipidinny Swamp were used by non-Indigenous settlers. More recently, the wetland was incorporated in the Yanchep National Park in 1991.This study sought to reconstruct the changes to the natural and cultural environments within the wetland to provide background knowledge for the management board of the Park. Field investigations abo demonstrated the dynamic state of the wetland over a six-month period between low water (Feb-Apr) and high water (Aug-Oct) by monitoring the groundwater system, the vegetation system, and …
The Applicability Of Stable Carbon Isotope Analysis To Measure The Water Use Efficiency Of Melaleuca Preissiana Populations On The Swan Coastal Plain, Western Australia, Hayley E. Valentine
The Applicability Of Stable Carbon Isotope Analysis To Measure The Water Use Efficiency Of Melaleuca Preissiana Populations On The Swan Coastal Plain, Western Australia, Hayley E. Valentine
Theses : Honours
Stable carbon isotope (δ13C) analysis is a tool used to understand the water use efficiency (WUE) of plants. The advantage of measuring the carbon isotope composition in plant tissue over other measures of WUE (such as the ratio of photosynthesis to transpiration) is that it provides a time-integrated, rather than an instantaneous measure of plant-water relations. The purpose of this study was to evaluate the applicability of using δ13C analysis in natural populations of the fringing tree Melaleuca preissiana based on short and long term sampling methods. There were three components to this study; a controlled, …
The Effect Of Leaf Movement On Algal Epiphytes In Seagrass Meadows, T. R. Reid
The Effect Of Leaf Movement On Algal Epiphytes In Seagrass Meadows, T. R. Reid
Theses : Honours
Artificial seagrass units were used to determine whether seagrass leaf movement influences the biomass, species richness and composition of epiphytic macroalgae on the leaves of seagrasses, and whether the influence of leaf movement is altered by the degree of exposure to water movement and to depth. The influence of leaf movement on epiphytic biomass is important from an environmental management perspective, as there is the potential for epiphytic productivity to be underestimated if leaf movement is reducing the standing crop of epiphytes on seagrass leaves. Two forms of artificial seagrass units were used in three experiments to achieve these objectives; …
Detecting The Cause Of Acidification At A Seasonal Wetland On The Swan Coastal Plain, Western Australia, Through Laboratory And Field Mesocosm Experiments, Kelli O'Neill
Theses : Honours
Acidification (pH< 4.5) was detected at Lake Jandabup, a shallow, seasonal wetland on the Swan Coastal Plain. Western Australia. Concern has been raised because populations of invertebrate species have declined or disappeared since acidification, potentially compromising the status of the lake as a nature reserve. The Jake bed is underlain with pyrite (feS2), which oxidises when dry producing sulfates, hydrogen ions and ferrous iron. Being seasonal, Lake Jandabup would be expected to be naturally acidic, but the more recent trend has been a prolonged (> 1 year) and extreme acidification (pH < 4.0). This study endeavoured to explain why the Jake may have undergone an acidic change, why it may have recovered and whether it will happen again. It was hypothesised that the acidification may have been caused by prolonged drying of the lake causing excessive oxidation of pyrite which produced more acid than the wetland could neutralise through buffering. The hypothesis was tested through laboratory and field experiments. The laboratory experiment involved taking intact sediment cores from around the lake, drying them for various lengths of time, and measuring pH, sulfate, total iron, total alkalinity and total aridity upon rehydration. Dried sediment from diatomaceous earth under Fe(OH)3 precipitate gave the lowest pH of less than 4.0. High sulfates, low alkalinity and low pH were interrelated. While drying in its own right produced low pH, generally there was no significant difference between drying times for release of selected variables. The field experiment involved the establishment of small in situ mesocosms to test for the effects …
Identification Of Wetland Plant Hydrotypes On The Swan Coastal Plain Western Australia, Robyn Loomes
Identification Of Wetland Plant Hydrotypes On The Swan Coastal Plain Western Australia, Robyn Loomes
Theses : Honours
The hydrology of 19 Swan Coastal Plain wetlands was described in relation to its influence on the composition and stn1cturc of wetland vegetation. Sixty species were identified as ‘wetland’ plants. The water depth ranges, or hydrological envelopes, of these species were determined and species grouped together based on the water regimes they experienced. Descriptions of wetland hydrology suggested that the surface and groundwater levels of the majority of study wetlands had declined in both the short (3-5 years) and long-term (20-50 years). Wetlands belonging to the Bibra Suite did not follow this trend as surface water levels either increased or …
The Use Of Stable Isotopic Signatures Of Marine Biota To Map Sewage Effluent Disposed Into The Marine Environment, Adam Gartner
The Use Of Stable Isotopic Signatures Of Marine Biota To Map Sewage Effluent Disposed Into The Marine Environment, Adam Gartner
Theses : Honours
Recent work indicates that nitrogen stable isotopic signatures of aquatic biota can be used to link nutrient inputs in the marine environment to terrestrial sources. While this technique of tracing nutrients has been shown to be effective in environments that are not nutrient limited, it has not been proved that this method is effective in oligotrophic environments. This study examined whether nitrogen stable isotopic signatures of marine biota can be used to trace the distribution of sewage effluent in highly mixed, nitrogen limited waters, by examining the δ15N values of marine biota situated close to and distant from …
Biofilm Composition And Function In Stormwater Constructed Wetland Systems On The Swan Coastal Plain, Western Australia, S. A. Hawkins
Biofilm Composition And Function In Stormwater Constructed Wetland Systems On The Swan Coastal Plain, Western Australia, S. A. Hawkins
Theses : Honours
The ability of natural wetlands to act as effective nutrient sinks and to absorb new nutrient loadings is well documented. Constructed wetland systems (CWSs) aimed at optimising these nutrient removal mechanisms have been used for the removal of nutrients and pollutants from a variety of waters and wastewaters over the past thirty years. Over the past decade, the use of CWSs has extended to the removal of nutrients from urban stormwater, as a more ecologically sensible management option to the traditional method of discharging stormwater into natural wetlands. Stormwater CWSs on the Swan Coastal Plain are designed to remove phosphorus. …
Managing Mountain Bike Impacts In The South West Of Western Australia : Combining Biophysical Impact Studies With Rider Preferences For Better Trail Design, Ute Goeft
Theses : Honours
This thesis examines the environmental impacts of mountain bikes on trails in the southwest of Western Australia and the preferences, perceptions, trail use and demographics of mountain bike riders in that region. This information is important for resource managers and trail developers to ensure that the trails that are provided and planned for mountain bike use in the region are environmentally appropriate and acceptable to users. The environmental impacts were examined through biophysical studies, which investigated soil loss, soil compaction and vegetation damage on and adjacent to mountain bike trails over a period of six months. A mountain bike racing …
The Distribution And Long-Term Change In Banksia Ilicifolia Communities On The Gnangara Mound, Ryan Gurner
The Distribution And Long-Term Change In Banksia Ilicifolia Communities On The Gnangara Mound, Ryan Gurner
Theses : Honours
The Gnangara Mound is a large shallow groundwater aquifer which occurs in the superficial formations bounded by the Swan River, Ellenbrook, Gingin Brook, Moore River and the Indian Ocean on the northern Swan Coastal Plain. To protect terrestrial vegetation on the Gnangara Mound. groundwater levels must be maintained to allow plants access to water which is required for their survival. In areas with a shallow depth to groundwater, studies have shown that groundwater drawdown (reduction of the water table by any processes or factors) has a high potential to impact on the vegetation (Havel. 1968: Aplin. 1976: Heddle. 1980a: Dodd …
The Soil Acarine Fauna Of Selected Agroecosystems Within The York Shire, Derek Juan Swarts
The Soil Acarine Fauna Of Selected Agroecosystems Within The York Shire, Derek Juan Swarts
Theses : Honours
The practice of broadacre, dryland farming is known to affect the physico-chemical structure of the soil but our knowledge or its impact on the biological structure is rudimentary. The soil acarine (mite) communities which inhabit these soils display a variety of responses to this agricultural practice. With the increasing focus on developing ecologically sustainable agricultural techniques, an understanding of the soil acari becomes increasingly important. This study investigated the impact of two agricultural practices (designated here us Conventional and Non-Conventional) upon the abundance and diversity of the soil acari. Conventional agricultural practice involved broad scale chemical application to weeds and …
The Birds And Habitat Of Kings Park, Bradley W. Cox
The Birds And Habitat Of Kings Park, Bradley W. Cox
Theses : Honours
Kings Park is a large urban park in the centre of Perth with extensive areas of semi-natural bushland. The park is an important refuge for birds in the metropolitan area but is losing species through habitat disturbance. Understanding the way in which birds are related to their habitat helps to understand the effect of habitat disturbance on the bird community. The aim of this project was to generate guidelines which will aid in the management and conservation of birds in the park, through an understanding of the relationship of the birds to their habitat. The avifauna and various habitat factors …
Carbon Sequestration Of Two Oil Mallee Species, Eucalyptus Loxophleba Subsp. Lissophloia And Eucalyptus. Kochii Subsp. Plenissima In The Semi-Arid Environment Of The Central Wheatbelt Of Western Australia, Andrew Phillip Mccarthy
Carbon Sequestration Of Two Oil Mallee Species, Eucalyptus Loxophleba Subsp. Lissophloia And Eucalyptus. Kochii Subsp. Plenissima In The Semi-Arid Environment Of The Central Wheatbelt Of Western Australia, Andrew Phillip Mccarthy
Theses : Honours
The planting of "Oil malices" have a number of implications in terms of environmental management within Western Australia. Firstly, the incorporation of perennial trees on a large scale into the agricultural landscape can assist in balancing the hydrological cycle and other land degradation problems (Bird et. al. 1992; Western Australian Salinity Action Plan, 1996). Secondly, harvesting the above-ground biomass can produce an economic return because of the oil contained within the leaves. This oil has the potential to replace ozone damaging solvents (Barton and Knight, J997; Wildy, 1996). Finally, "oil mallees" have the potential to offset greenhouse gas emissions, because …
Perceptions Of Seagrass Ecosystem Health And Potential Indicators For Monitoring, Nick Wood
Perceptions Of Seagrass Ecosystem Health And Potential Indicators For Monitoring, Nick Wood
Theses : Honours
A range of seagrass characteristics were assessed for potential use as indicators of ecosystem health. Shoot density, shoot width, maximum shoot length, above and below ground biomass, percentage canopy cover, leaf area index, leaf extension rate, meadow productivity, epiphyte biomass, epiphyte species richness, percentage of calcium carbonate in epiphytic material and percentage of nitrogen in leaf tissue were all measured in “healthy~ and unhealthy" Posidonia augustifolia meadows in Cockburn and Warnbro Sounds, from June through to August 1998. A questionnaire was used to determine which meadows researchers and managers in the seagrass ecology field in Perth perceived to be healthy …
Coastal Zone Monitoring And Evaluation : A Descriptive Analysis Of Western Australian Practices, Michael F. Williams
Coastal Zone Monitoring And Evaluation : A Descriptive Analysis Of Western Australian Practices, Michael F. Williams
Theses : Honours
Currently there is no information available which documents the monitoring and evaluation practices undertaken in the coastal zone of Western Aust1alia by coastal zone managers. A review of current Australian-wide management practices in coastal management reveals that monitoring and evaluation are limited in their application. The adequacy of the links between coastal monitoring and evaluation, on which our understanding of the state of the coastal zone environment is based, is one of two central themes throughout this research. The other theme is that without an accurate, reliable and effectively managed monitoring and research information base, coastal management will be haphazard …
Fuel Characteristics Of Rehabilitated Bauxite Mines In Western Australia, Sarah J. Collins
Fuel Characteristics Of Rehabilitated Bauxite Mines In Western Australia, Sarah J. Collins
Theses : Honours
This investigation assessed the fuel characteristics of Alcoa of Australia's rehabilitated bauxite mines in the south-west of Western Australia. The study determined the fuel loads, their composition and structure. The characteristics of fuel were determined, their relationship with time ascertained, and the similarity of these characteristics to the jarrah forest ecosystems that they have replaced was discussed. Pits aged from four to twenty years since rehabilitation were assessed. Predictive models were developed to allow the rapid assessment of fuel. The fuel characteristics in two controlled bum areas were also assessed to how much fuel would burn in a fire and …