ORCID Profile
0000-0003-2651-4061
Current Organisations
Murray Darling Basin Authority
,
RAMSAR Secretariat
,
University of Tasmania
,
Australian Government
,
Commonwealth of Australia
,
Freshwater Systems
,
Government of Victoria
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Publications
Extinct habitat, extant species: lessons learned from conservation recovery actions for the Pedder galaxias (Galaxias pedderensis) in south-west Tasmania, Australia
Publisher: CSIRO Publishing
Date: 2013
DOI: 10.1071/MF12257
Abstract: The Pedder galaxias (Galaxias pedderensis) from Lake Pedder, Tasmania, Australia, is one of the world’s most threatened freshwater fish. The flooding of Lake Pedder in 1972 for hydroelectric power generation caused a major change to the ecosystem that initiated an irreversible decline in the Pedder galaxias within its natural range. The flooding inundated another headwater catchment and native and introduced fish from this catchment colonised the impoundment. Numbers of the Pedder galaxias declined markedly as the impoundment matured and as colonising fish proliferated. Surveys in the 1980s confirmed the parlous state of the population, highlighting the need for conservation intervention. Several urgent conservation actions were undertaken to save the species from extinction. Translocation was considered the most important recovery action, given the critically low numbers in the wild. The species is now extinct from its natural range and is known from only two translocated populations. The conservation program, and specifically the translocation recovery action, saved the Pedder galaxias from extinction. The conservation management was extremely challenging since rapidly declining fish numbers needed timely and critical decisions to underpin the future of the fish. Recommendations are provided arising from this case study to guide conservation of freshwater fish in similar circumstances.
Impacts of land use on the structure of river macroinvertebrate communities across Tasmania, Australia: spatial scales and thresholds
Publisher: CSIRO Publishing
Date: 2012
DOI: 10.1071/MF11267
Abstract: The formulation of scientifically justified guidelines for management of anthropogenic impacts on river health requires better understanding of the quantitative linkages among river-system parameters. The present study examines relationships between land use and biological metrics of river health in Tasmania, in the context of a variety of environmental drivers. An extensive dataset (103 sites) of macroinvertebrate assemblages was collected between 1999 and 2006. We hypothesised that grazing by domestic livestock would have the greatest impact on community structure of the land-use types investigated because grazing is a dominant land-use type in Tasmania (and can cover a large proportion of catchment area), because land clearance for grazing is rarely followed by regeneration and because historically riparian vegetation has not been protected. Multivariate and correlation analysis showed that community structure responded strongly to land use and confirmed that the strongest relationships were observed for grazing land use and environmental variables associated with grazing, such as e.g. water abstraction and/or regulation and riparian vegetation. Analyses accounting for hydrological region and location confirmed the generality of this relationship. We conclude that catchment-wide management actions would be required to mitigate these impacts of grazing because land use and riparian vegetation condition were generally stronger determinants of community structure at catchment rather than local scales.
The toxicology and metabolism of chlorothalonil in fish. II. Glutathione conjugates and protein binding
Publisher: Elsevier BV
Date: 12-1985
The toxicology and metabolism of chlorothalonil in fish. I. Lethal levels for Salmo gairdneri, Galaxias maculatus, G. truttaceus and G. auratus and the fate of 14C-TCIN in S. gairdneri
Publisher: Elsevier BV
Date: 10-1985
Application of the Australian river bioassessment system (AUSRIVAS) in the Brantas River, East Java, Indonesia
Publisher: Elsevier BV
Date: 05-2001
Abstract: Assessment of river 'health' using biological methods, particularly those based on macro-invertebrates, is now commonplace in most developed countries. However, this is not the case in most developing countries, where physical and chemical methods are used to assess water quality, with very little use of biological assessment methods. This paper reports on a project that aimed to assess the possible introduction of biological assessment of river condition using the Australian River Assessment System (AUSRIVAS) into Indonesia. The paper addresses three components of the project: (1) science--does the bioassessment method work in this tropical region? (2) resources--are they adequate and if not what additional resources are needed? (3) politics--what needs to be done to convince the agencies (both central and provincial) to take up such a new philosophy and approach? A pilot study was run in the upper Brantas River, East Java. A total of 66 reference sites and 15 test sites were s led and the macro-invertebrates collected were identified to family level. A rigorous quality-control protocol was introduced to ensure the data were reliable and reproducible. The macro-invertebrate data were used to develop a predictive model of the AUSRIVAS type for the upper Brantas River, and the model was then used to assess the 'health' of sites that were presumed to be damaged in this section of the river. A number of difficulties were experienced during the study, including: locating reference sites sufficiently unmodified by humans lack of skills to identify animals collected and a paucity of facilities required for aquatic macro-invertebrate identification (e.g. identification keys and good quality binocular microscopes). For resources, the major constraint to the introduction of a bioassessment capability in Indonesia is the lack of personnel trained in the bioassessment techniques. An 'on-the-job' training approach was adopted, largely because of the specialist nature of this work. Six Indonesians were trained and will now become the 'trainers' of further Indonesian scientists (we have called this process 'training-the-trainers'). For politics, it was hoped that the AUSRIVAS method would be suitable for introduction into the Indonesian national Clean River Program. A strategy was developed and implemented to ensure the method and its outputs were accepted technically by the Indonesian scientific community, and also by the resource managers and relevant government officials. Experience shows that if the latter do not see how the bioassessment information will be used for management purposes they will not accept the method even if it is scientifically sound.
Buffer strips and streamwater contamination by atrazine and pyrethroids aerially applied to eucalyptus nitens plantationss
Publisher: Informa UK Limited
Date: 1993
The Sustainable Rivers Audit: assessing river ecosystem health in the Murray-Darling Basin, Australia
Publisher: CSIRO Publishing
Date: 2010
DOI: 10.1071/MF09043
Abstract: The Sustainable Rivers Audit (SRA) is a systematic assessment of the health of river ecosystems in the Murray–Darling Basin (MDB), Australia. It has similarities to the United States’ Environmental Monitoring and Assessment Program, the European Water Framework Directive and the South African River Health Program, but is designed expressly to represent functional and structural links between ecosystem components, biophysical condition and human interventions in the MDB. Environmental metrics derived from field s les and/or modelling are combined as indicators of condition in five themes (Hydrology, Fish, Macroinvertebrates, Vegetation and Physical Form). Condition indicator ratings are combined using expert-system rules to indicate ecosystem health, underpinned by conceptual models. Reference condition, an estimate of condition had there been no significant human intervention in the landscape, provides a benchmark for comparisons. To illustrate, a synopsis is included of health assessments in 2004–2007. This first audit completed assessments of condition and ecosystem health at the valley scale and in altitudinal zones, and future reports will include trend assessments. SRA river-health assessments are expected to play a key role in future water and catchment management through integration in a Basin Plan being developed by the Murray–Darling Basin Authority for implementation after 2011. For ex le, there could be links to facilitate monitoring against environmental targets.
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Publisher: Springer Science and Business Media LLC
Date: 2001
Interannual variability in climate and fisheries in Tasmania
Publisher: Springer Science and Business Media LLC
Date: 06-1988
DOI: 10.1038/333754A0
Inferring landscape-scale land-use impacts on rivers using data from mesocosm experiments and artificial neural networks
Publisher: Public Library of Science (PLoS)
Date: 16-03-2015
Changes in benthic macroinvertebrate communities in upper catchment streams across a gradient of catchment forest operation history
Publisher: Elsevier BV
Date: 04-2009
Catastrophic macroinvertebrate drift and sublethal effects on brown trout, Salmo trutta, caused by cypermethrin spraying on a Tasmanian stream
Publisher: Elsevier BV
Date: 12-1993
Investigating the relationships between environmental stressors and stream condition using Bayesian belief networks
Publisher: Wiley
Date: 23-09-2011
Triazine herbicide contamination of Tasmanian streams: Sourves, concentrations and effects on biota
Publisher: CSIRO Publishing
Date: 1994
DOI: 10.1071/MF9940209
Abstract: Concentrations of the triazine herbicides atrazine, simazine, cyanazine, metribuzin and propazine were determined in streams draining forestry and agricultural catchments in Tasmania, Australia, between 1989 and 1992. Atrazine and simazine were used extensively by the forestry industry in a winter spraying programme, and applications of the other herbicides occurred in cropped agricultural catchments during spring and summer. Of 29 streams s led intensively for triazines, 20 contained detectable residues. Median contaminations over all s les were 2.85, 1.05, .05, .05 and .05 �g L-1 for atrazine, simazine, cyanazine, metribuzin and propazine, respectively. All herbicide concentrations ranged over several orders of magnitude up to 53 mg L-1, with atrazine and simazine having significantly higher concentrations than the others. Atrazine concentrations were examined in streams draining forestry plantations for periods of up to two years. A decline in concentration was observed with time, but this was strongly influenced by rainfall events. Atrazine contamination from single spraying events persisted at a low level for up to 16 months. Contamination of Big Creek with atrazine to 22�g L-1 after aerial spraying led to an increase in stream invertebrate drift only on the day of spraying and to a short-term increase in movement of brown trout. On examination of biological effects of triazines in surface waters reported in the literature, it was concluded that the observed frequent contamination of Tasmanian streams with triazines may cause occasional minor short-term disturbance to stream communities.
Ecosystem science: Toward a new paradigm for managing Australia's inland aquatic ecosystems
Publisher: CSIRO Publishing
Date: 2009
DOI: 10.1071/MF08188
Abstract: Freshwater ecosystems are a foundation of our social, cultural, spiritual and economic well being. The degraded condition of many of Australia’s river ecosystems is testament to our failure to manage these resources wisely. Ecosystem science involves the holistic study of complex biophysical systems to understand the drivers that influence ecological pattern and process. Ecosystem science should underpin both water management and policy. Our understanding of aquatic ecosystems lags behind the increasing problems caused by past land and water management. Current post-graduate training programmes will not provide the aquatic ecosystem scientists needed by government and management agencies to prevent further degradation. We advocate new initiatives to capture the skills, knowledge and innovation of our research community by engaging scientists and managers in large-scale, long-term ecosystem science programmes across Australia and to integrate these programmes with community aspirations, policy, planning and management. We call on management agencies to increase their support for and uptake and use of ecosystem science. We also advocate establishment of national archives for long-term ecologically-relevant data and s les, and clear custodial arrangements to protect, update and facilitate knowledge-transfer. These initiatives need to be supported by more extensive, better-funded post-graduate and post-doctoral programmes in ecosystem science and management.
The toxicology and metabolism of chlorothalonil in fish. IV. Zinc coexposure and the significance of metallothionein in detoxication in Salmo gairdneri
Publisher: Elsevier BV
Date: 12-1985
The effects of a multi-modal intervention trial of light, exercise, and vitamins on women's mood.
Publisher: Informa UK Limited
Date: 31-10-2001
Changes in stream biota along a gradient of logging disturbance, 15 years after logging at Ben Nevis, Tasmania
Publisher: Elsevier BV
Date: 11-2005
Improving the upstream passage of two galaxiid fish species through a pipe culvert
Publisher: Wiley
Date: 10-05-2007
Variation in stream organic matter processing among years and benthic habitats in response to forest clearfelling
Publisher: Elsevier BV
Date: 09-2014
Macroinvertebrate assemblages of littoral habitats in the Macquarie and Mersey Rivers, Tasmania: Implications for the management of regulated rivers
Publisher: Wiley
Date: 1996
DOI: 10.1002/(SICI)1099-1646(199601)12:1<99::AID-RRR382>3.0.CO;2-1
Upstream heterogeneous zones: small stream systems structured by a lack of competence?
Publisher: University of Chicago Press
Date: 09-2007
DOI: 10.1899/06-067.1
Physiological, anatomic and behavioural changes in the respiratory system of Salmo gairdneri rich. on acute and chronic exposure to chlorothalonil
Publisher: Elsevier BV
Date: 1987
DOI: 10.1016/0742-8413(87)90054-5
Abstract: 1. Various changes in anatomical, physiological and behavioural aspects of the respiratory system of Salmo gairdneri on exposure to chlorothalonil (TCIN) were examined, along with the relationship between LC50 response and oxygen concentration. 2. The TCIN LC50 was significantly lower at 5 mg/l oxygen concentration than at 8 mg/l. 3. Haematocrit was depressed on exposure to TCIN, whereas exposure to pentachlorophenol and lindane raised the haematocrit. Muscle lactate was not elevated in acutely exposed fish. 4. Ventilatory frequency was raised above 30 micrograms/l TCIN. 5. Gills of fish exposed to 2.0 micrograms/l TCIN for 24 days had reduced lamellar diffusive capacity, primarily caused by an increase in blood barrier thickness.
Australia's biodiversity conservation strategy 2010-2020: Scientists' letter of concern
Publisher: Wiley
Date: 31-07-2009
The toxicology and metabolism of chlorothalonil in fish. III. Metabolism, enzymatics and detoxication in Salmo spp. and Galaxias spp.
Publisher: Elsevier BV
Date: 12-1985
Selectively 13 C-enriched 2,4-diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine (trimethoprim) and 2,4-diaminopyrimidine
Publisher: Royal Society of Chemistry (RSC)
Date: 1986
DOI: 10.1039/P19860000747
The effect of steep slope logging on fine sediment infiltration into the beds of ephemeral and perennial streams of the Dazzler Range, Tasmania, Australia
Publisher: Elsevier BV
Date: 10-1993
Changes to headwater stream morphology, habitats and riparian vegetation recorded 15 years after pre-Forest Practices Code forest clearfelling in upland granite terrain, Tasmania, Australia
Publisher: Elsevier BV
Date: 10-2005
Disappearance rates of chlorothalonil (TCIN) in the aquatic environment
Publisher: Springer Science and Business Media LLC
Date: 03-1988
DOI: 10.1007/BF01689098
Abstract: We introduce the characterization of a class of quantum PageRank algorithms in a scenario in which some kind of quantum network is realizable out of the current classical internet web, but no quantum computer is yet available. This class represents a quantization of the PageRank protocol currently employed to list web pages according to their importance. We have found an instance of this class of quantum protocols that outperforms its classical counterpart and may break the classical hierarchy of web pages depending on the topology of the web.
Relating upstream forest management to stream ecosystem condition in middle catchment reaches in Tasmania
Publisher: Elsevier BV
Date: 02-2016
Related Organisations
Related Funding Activities
No related grants have been discovered for Peter E Davies.