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Articles 1 - 18 of 18
Full-Text Articles in Physical Sciences and Mathematics
Ecological Restoration Of Novel Lake Districts: New Approaches For New Landscapes, Clinton D. Mccullough, Eddie J. Van Etten
Ecological Restoration Of Novel Lake Districts: New Approaches For New Landscapes, Clinton D. Mccullough, Eddie J. Van Etten
Research outputs 2011
Mine void pit lakes often contain water of poor quality with potential for environmental harm that may dwarf other mine closure environmental issues in terms of severity, scope, and longevity. This is particularly so when many pit lakes occur close together and thus form a new ‘‘lake district’’ landscape. Pit lakes that can be developed into healthy lake or wetland ecosystems as a beneficial end use provide opportunities for the mining industry to fulfil commitments to sustainability. Clearly articulated restoration goals and a strategic closure plan are necessary to ensure pit lake restoration toward a new, yet regionally-relevant, aquatic ecosystem, …
How Green Are Climate Change Issues?: An Auditor's Perspective, Maya Purushothaman, Ross Taplin
How Green Are Climate Change Issues?: An Auditor's Perspective, Maya Purushothaman, Ross Taplin
Research outputs 2011
Climate change and carbon emissions have become an important issue for companies, not only if companies are to maintain legitimacy as good corporate citizens but also financially with the regulation of carbon emissions and the impending introduction of the Australian Emission Trading Scheme (AETS). This paper investigates the role of financial auditors in the climate change debate. Content analysis of the websites of fifteen large auditors in Australia reveals different reactions to this issue, from reacting to proposed legislation to proposing initiatives proactively and providing guidelines for companies. Analysis of the websites from a random sample of companies audited by …
Inoculations With Arbuscular Mycorrhizal Fungi Increase Vegetable Yields And Decrease Phoxim Concentrations In Carrot And Green Onion And Their Soils, Fa Yuan Wang, Rui Jian Tong, Zhao Yong Shi, Xiao Feng Xu, Xinhua He
Inoculations With Arbuscular Mycorrhizal Fungi Increase Vegetable Yields And Decrease Phoxim Concentrations In Carrot And Green Onion And Their Soils, Fa Yuan Wang, Rui Jian Tong, Zhao Yong Shi, Xiao Feng Xu, Xinhua He
Research outputs 2011
Background As one of the most widely used organophosphate insecticides in vegetable production, phoxim (C12H15N2O3PS) is often found as residues in crops and soils and thus poses a potential threat to public health and environment. Arbuscular mycorrhizal (AM) fungi may make a contribution to the decrease of organophosphate residues in crops and/or the degradation in soils, but such effects remain unknown. Methodology/Principal Findings A greenhouse pot experiment studied the influence of AM fungi and phoxim application on the growth of carrot and green onion, and phoxim concentrations in the two vegetables and their soil media. Treatments included three AM fungal …
Gradients In The Number Of Species At Reef-Seagrass Ecotones Explained By Gradients In Abundance, Fernando Tuya, Mathew Vanderklift, Thomas Wernberg, Mads Thomsen
Gradients In The Number Of Species At Reef-Seagrass Ecotones Explained By Gradients In Abundance, Fernando Tuya, Mathew Vanderklift, Thomas Wernberg, Mads Thomsen
Research outputs 2011
Gradients in the composition and diversity (e. g. number of species) of faunal assemblages are common at ecotones between juxtaposed habitats. Patterns in the number of species, however, can be confounded by patterns in abundance of individuals, because more species tend to be found wherever there are more individuals. We tested whether proximity to reefs influenced patterns in the composition and diversity ('species density' = number of species per area and 'species richness' = number of species per number of individuals) of prosobranch gastropods in meadows of two seagrasses with different physiognomy: Posidonia and Amphibolis. A change in the species …
The Relationship Between Water, Health And Global Environmental Change, As Interpreted Through Five Key Multilateral Environmental Agreements (Meas), Pierre Horwitz, Lucilla Spini, Kathryn Campbell, R J Thomas, Jo Mulongoy
The Relationship Between Water, Health And Global Environmental Change, As Interpreted Through Five Key Multilateral Environmental Agreements (Meas), Pierre Horwitz, Lucilla Spini, Kathryn Campbell, R J Thomas, Jo Mulongoy
Research outputs 2011
For five Multilateral Environmental Agreements (MEAs), we have examined the way the relationship between water, health and global environmental change is expressed and how it has evolved recently. We recognize a distinction between an emphasis on water and reservoirs of water for health (for drinking water supplies, sanitation and hygiene), and a focus on places of water, where wetland ecosystems provide a service for human well-being which encompasses health. We also recognize a trend over time for the MEAs to increasingly address water, health and global change issues as a reaction to emerging infectious diseases and global pandemics. For both …
Limiting Factors For Crayfish And Finfish In Acidic Coal Pit Lake, Clinton Mccullough, Mark Lund
Limiting Factors For Crayfish And Finfish In Acidic Coal Pit Lake, Clinton Mccullough, Mark Lund
Research outputs 2011
World-wide, open-cut mining operations often leave pit lakes at closure. The Collie Lake District in south-west Australia has 13 pit lakes from open-cut coal extraction, with more expected. Many lakes may offer beneficial end uses as fisheries habitat for biodiversity or for recreational species. However, pit lakes may have degraded water quality due to Acid and Metalliferous Drainage (AMD). A literature review and survey for marron (endemic crayfish of biodiversity and recreational value) and fin-fish (of only biodiversity value) found that crayfish were likely more limited by habitat and food availability, and fin-fish by water quality. Management of these mild …
Children's Exposure To Metals: A Community-Initiated Study, Anna Carita Callan, Matthew Winters, Caroline Barton, Mary C. Boyce, Andrea Lee Hinwood
Children's Exposure To Metals: A Community-Initiated Study, Anna Carita Callan, Matthew Winters, Caroline Barton, Mary C. Boyce, Andrea Lee Hinwood
Research outputs 2011
In 2007, it was shown that the shipping of lead (Pb) through Esperance Port in Western Australia resulted in contamination and increased Pb concentrations in children. A clean-up strategy was implemented; however, little attention was given to other metals. In consultation with the community, a cross-sectional exposure study was designed. Thirty-nine children aged 1 to 12 years provided samples of hair, urine, drinking water, residential soil and dust. Concentrations of nickel (Ni) and Pb were low in biological and environmental samples. Hair aluminium (Al) (lower than the detection limit [DL] to 251 μg/g) and copper (Cu) (7 to 415 μg/g), …
Subtidal Macroalgal Richness, Diversity And Turnover, At Multiple Spatial Scales, Along The Southwestern Australian Coastline, David Smale, G Kendrick, Thomas Wernberg
Subtidal Macroalgal Richness, Diversity And Turnover, At Multiple Spatial Scales, Along The Southwestern Australian Coastline, David Smale, G Kendrick, Thomas Wernberg
Research outputs 2011
Patterns of species richness are governed by processes that act at vastly different spatial scales. In the marine system of southwest Australia, macroalgal assemblage structure and richness is thought to be strongly influenced by both the Leeuwin Current, which acts at large regional spatial scales, and small-scale processes such as competition, wave disturbance and habitat heterogeneity. We examined macroalgal species richness and diversity at multiple spatial scales using a three-factor hierarchal design. Spatial extents ranged from metres (between quadrats) to many hundreds of kilometres (between regions), and the study encompassed almost 2000 km of temperate coastline. Macroalgal assemblages were highly …
Quantitative Approaches In Climate Change Ecology, Christopher J. Brown, David S. Schoeman, William J. Sydeman, Keith Brander, Lauren B. Buckley, Michael Burrows, Carlos M. Duarte, Pippa J. Moore, John M. Pandolfi, Elvira Poloczanska, William Venables, Anthony J. Richardson
Quantitative Approaches In Climate Change Ecology, Christopher J. Brown, David S. Schoeman, William J. Sydeman, Keith Brander, Lauren B. Buckley, Michael Burrows, Carlos M. Duarte, Pippa J. Moore, John M. Pandolfi, Elvira Poloczanska, William Venables, Anthony J. Richardson
Research outputs 2011
Contemporary impacts of anthropogenic climate change on ecosystems are increasingly being recognized. Documenting the extent of these impacts requires quantitative tools for analyses of ecological observations to distinguish climate impacts in noisy data and to understand interactions between climate variability and other drivers of change. To assist the development of reliable statistical approaches, we review the marine climate change literature and provide suggestions for quantitative approaches in climate change ecology. We compiled 267 peer-reviewed articles that examined relationships between climate change and marine ecological variables. Of the articles with time series data (n = 186), 75% used statistics to test …
A Pre & Post Analysis Of The Impact Of Carbon Regulation & Ratification Of The Kyoto Protocol: An Australian Perspective, Maya Purushothaman, Ross Taplin
A Pre & Post Analysis Of The Impact Of Carbon Regulation & Ratification Of The Kyoto Protocol: An Australian Perspective, Maya Purushothaman, Ross Taplin
Research outputs 2011
This study examines emission and energy disclosures of 400 randomly selected Australian listed companies in 2005, 2007 and 2009 using a disclosure index derived from the Global Reporting Initiative. The longitudinal nature of this study provides a more comprehensive view of the online emissions and energy disclosures of Australian companies and highlights the impact of the ratification of the Kyoto Protocol and the introduction of carbon regulations, National Greenhouse and Energy Reporting (NGER) and Energy Efficiency Opportunities (EEO).The results were compared between the two periods, it was noted that rate of increase was lower during the latter (2007 to 2009) …
Spatial Patterns In Herbivory On A Coral Reef Are Influenced By Structural Complexity But Not By Algal Traits, Adriana Verges, Mathew Vanderklift, C Doropoulos, Glenn Hyndes
Spatial Patterns In Herbivory On A Coral Reef Are Influenced By Structural Complexity But Not By Algal Traits, Adriana Verges, Mathew Vanderklift, C Doropoulos, Glenn Hyndes
Research outputs 2011
No abstract provided.
Resilience Of Phreatophytic Vegetation To Groundwater Drawdown: Is Recovery Possible Under A Drying Climate?, Bea Sommer, Raymond Froend
Resilience Of Phreatophytic Vegetation To Groundwater Drawdown: Is Recovery Possible Under A Drying Climate?, Bea Sommer, Raymond Froend
Research outputs 2011
Banksia (Proteaceae) woodlands are one of a number of groundwater-dependent ecosystems in southwestern Western Australia that are threatened by groundwater abstraction. In addition to this threat is an ongoing decline in regional water tables due to a drying climate. We used ecological resilience theory to analyse and interpret a long-term vegetation monitoring dataset from a site that has experienced an abstraction-induced acute groundwater drawdown in the late 1980s and early 1990s. Despite reduced plant abundance, all dominant over- and understorey species were still found on all transect plots in which they were recorded pre-drawdown. This suggests a notional resilience and …
Recovery From The Impact Of Light Reduction On The Seagrass Amphibolis Griffithii, Insights For Dredging Management, Kathryn Mcmahon, Paul Lavery, Michael Mulligan
Recovery From The Impact Of Light Reduction On The Seagrass Amphibolis Griffithii, Insights For Dredging Management, Kathryn Mcmahon, Paul Lavery, Michael Mulligan
Research outputs 2011
A large-scale, manipulative experiment was conducted to examine the extent and rate of recovery of meadows of the temperate Australian seagrass, Amphibolis griffithii to different light-reduction scenarios typical of dredging operations, and to identify potential indicators of recovery from light reduction stress. Shade cloth was used to mimic different intensities, durations and start times of light reduction, and then was removed to assess the recovery. The meadow could recover from 3 months of light stress (5–18% ambient) following 10 months re-exposure to ambient light, even when up to 72% of leaf biomass was lost, much faster recovery rates than has …
Model-Based Investigations Of Acidity Sources And Sinks Of A Pit Lake In Western Australia, Mike Mueller, Katja Eulitz, Clinton Mccullough, Mark Lund
Model-Based Investigations Of Acidity Sources And Sinks Of A Pit Lake In Western Australia, Mike Mueller, Katja Eulitz, Clinton Mccullough, Mark Lund
Research outputs 2011
Lake Kepwari is a rehabilitated lake in the Collie Basin lignite mining area in Western Australia. The water quality of Lake Kepwari was modeled with the pit lake hydrodynamic and water quality model PITLAKQ. Based on a hydrodynamically validated model, water quality scenarios were used to quantify the sensitivity of different acidity sources including groundwater exchange, surface runoff and erosion, providing new insights into the system. The technique of monthly aggregation of all sources and sinks of acidity, based on detailed model output, provided the basis for useful conclusions. Model results suggest a new focus of field investigations to improve …
Evaluating The Factors Limiting Algal Biomass In Acidic Pit Lakes Of The Collie Lake District, Western Australia, Naresh Radhakrishnan, Clinton Mccullough, Mark Lund, Santiago Larranaga Arrizabalaga
Evaluating The Factors Limiting Algal Biomass In Acidic Pit Lakes Of The Collie Lake District, Western Australia, Naresh Radhakrishnan, Clinton Mccullough, Mark Lund, Santiago Larranaga Arrizabalaga
Research outputs 2011
Acidic pit lakes often have elevated metal concentrations, very low nutrient concentrations and very low algal primary productivity. A microcosm experiment was performed to identify the main limiting factor(s) for algal biomass. Nutrients (N, P and C) were added in all possible combinations to pit lake water in the presence or absence of pit lake sediment. Microcosms without sediment showed higher chlorophyll a concentrations compared to the treatments with sediment. Microcosms where nitrogen and phosphorus were added showed highest chlorophyll a concentrations. Results suggest that algal biomass in pit lakes may be primarily limited by low nitrogen and phosphorus concentrations.
Potential Of Sewage And Green Waste For Acidic Pit Lake Bioremediation, Naresh Radhakrishnan, Clinton Mccullough, Mark Lund
Potential Of Sewage And Green Waste For Acidic Pit Lake Bioremediation, Naresh Radhakrishnan, Clinton Mccullough, Mark Lund
Research outputs 2011
Bacterial sulfate reduction-based bioremediation was trialled in an acidic pit lake, divided into two sections by an earth wall. Sewage and green waste was added to the smallest section, while the other was kept untreated as a control. Bioremediation initially increased the pH of the hypolimnion of the treatment lake but after 12 months the pH suddenly returned to pre-treatment levels. This proved to be only temporary and pH bounced quickly back to previous highs. The pH decreases appeared to be associated with heavy rainfall events. These rainfall events affected the bioremediation by mixing the lake and increasing acidity inputs …
A Multi-Model Approach To Stakeholder Engagement In Complex Environmental Problems, Elizabeth A. Fulton, T. Jones, Fabio Boschetti, M. Sporcic, William De La Mare, Geoffrey J. Syme, Peta Dzidic, R. Gorton, L. R. Little, G. Dambacher, Kelly Chapman
A Multi-Model Approach To Stakeholder Engagement In Complex Environmental Problems, Elizabeth A. Fulton, T. Jones, Fabio Boschetti, M. Sporcic, William De La Mare, Geoffrey J. Syme, Peta Dzidic, R. Gorton, L. R. Little, G. Dambacher, Kelly Chapman
Research outputs 2011
We describe the different types of models we used as part of an effort to inform policy-making aiming at the management of the Ningaloo coast in the Gascoyne region, Western Australia. This provides an overview of how these models interact, the different roles they cover, how they fit into a full decision making process and what we learnt about the stakeholders involved in our project via their use. When modelling is explicitly used to address socio-ecological issues, the key determinant of success is whether the models, their results and recommendations are taken up by stakeholders; such uptake in turn depends …
Integrated Modelling For Understanding Watershed Development Impacts On Social And Biophysical Systems, Wendy Merritt, V. R. Reddy, K. V. Rao, Paul Pavelic, Shakeel Ahmed, Ram Ranjan, Barry F.W. Croke, Geoffrey J. Syme
Integrated Modelling For Understanding Watershed Development Impacts On Social And Biophysical Systems, Wendy Merritt, V. R. Reddy, K. V. Rao, Paul Pavelic, Shakeel Ahmed, Ram Ranjan, Barry F.W. Croke, Geoffrey J. Syme
Research outputs 2011
The intention of watershed development (WD) programs in India is to improve the livelihoods of people and preserve the natural resource base, particularly in areas where water scarcity limits the development potential of rural communities. In practice, there are many complications to implementing WD programs in an effective and equitable way for all people within and between villages in a catchment. Our understanding of the potential implications of a program is often limited by the way in which we investigate the biophysical-social-economic system. Two common failings are (a) not properly considering the importance of the place, scope and scale of …