Land use, water quality and ecological responses in Lake Colac – trends from Australia

Purpose - Recently, Colac Otway Shire in Australia released its management plan for Lake Colac, claiming over-enrichment of the lake with nutrients and degraded water quality. This paper aims to investigate these claims by establishing a correlation between key water and ecological indicators and land uses.

Design/methodology/approach - Examines the correlation between impairment and stressors in Lake Colac. This was achieved by identifying the likely sources of pollutants into Lake Colac; identifying any existing monitoring program; and characterizing the water and sediment inputs. The likely impacts of increased nutrients and sediment levels on indigenous flora and fauna were also examined. The use of meiofauna (very small benthic metazoan animals) was investigated as an indicator of degraded sites. Plankton diversity as a measure of water health was also assessed.

Findings - Water quality in Lake Colac was found to vary both temporally and spatially, and exhibited low attainment against acceptable trigger values/objectives. At current levels the lake can be classified as poorly degraded. Likely sources of pollution were identified to be related to land uses in the catchments. The biota of the lake, investigated at four study sites, yielded a sparse, benthic macrofaunal assemblage that was dominated by oligochaetes. In contrast, an abundant and taxonomically diverse meiofaunal assemblage was noted. Future meiofaunal analyses are likely to resolve suitable biotic indicator species of free-living nematodes in response to land use and waterway threats specified in the study. Originality value - This work will provide a better understanding of integrated environmental systems to enable development of best management practices, thus transforming the way the land and water are used in the future. Following the present work, other key water and ecological indicators (increased dispersion and dominance of biological species) at five additional sites were studied. Alternative management options for the effluent generated at Colac Sewage Treatment Plant and possible ecological effects of each option were also evaluated. More recently, a sediment characterization study was also carried out at sensitive sites representative of locations where build up of sediments and algae outbreaks are reported. This will enable classification of sediment and evaluation of dredging options.

Readiness for treatment in high risk offenders with personality disorders

Low engagement and non-completion of therapeutic interventions are important issues in the treatment and rehabilitation of offenders and mentally disordered offenders. Such factors influence a range of outcomes, including the reduction of clinical and criminogenic needs. In this paper it is proposed that low engagement and non-completion are usefully viewed as a consequence of low readiness for treatment. The dimensions of readiness are summarized (from the Multifactor Offender Readiness Model) and applied to high risk offenders with severe personality disorders. A readiness analysis has implications for the assessment and treatment of this patient/offender population and is useful in identifying future research and clinical priorities.

The multifactor offender readiness model

There has been a resurgence of interest in the rehabilitation of offenders. Research has consistently shown that rehabilitation programs for offenders, when they adhere to general principles of program design and delivery, will achieve significant reductions in recidivism. In this paper, we suggest that even greater reductions in recidivism can be achieved when readiness is addressed at the level of the individual offender, the program, and the context. A comprehensive understanding of readiness allows for fuller engagement in treatment, thus increasing probability of good treatment outcomes. We describe person, program, and context factors in a model of offender treatment readiness and discuss implications of the model for both assessment of offenders and for modification of low readiness.

Australian waterbirds : time and space travellers in dynamic desert landscapes

Australia’s waterbirds are mostly nomadic, capitalising on highly variable aquatic resources in the arid interior (70% of the continent) for feeding and breeding. Waterbirds, unlike most aquatic organisms, can move between catchments, exploiting habitat wherever it occurs. In Australia, patterns of resource availability for waterbirds are mostly pulsed with peaks of productivity, coinciding with flooding and differing in time and space, affecting individuals, species and functional groups of waterbirds. Australian waterbirds are no different from waterbirds elsewhere, with their behaviour reflecting broad-scale resource availability. They respond to changing patterns of resource distribution, with rapid movements at spatial and temporal scales commensurate with the dynamics of the resource. The most serious conservation threat to waterbirds is a bottleneck in resource availability, leading to population declines, increasingly forced by anthropogenic impacts. River regulation and other threats (e.g. draining) reduce the availability of wetland habitat and decrease the probability of viable resource patches. It is axiomatic that waterbirds need water and such population bottlenecks may occur when the availability of water across the continent is limited. The rehabilitation of regulated rivers with environmental flows and protection of naturally flowing rivers in the arid region are essential for long-term sustainability of Australia’s waterbird populations.

Reinstating indigenous landscape planning curatorship : the Lake Condah restoration project

While contemporary Western planning traditions in Australia talk of the last 200 years of innovation and transposition of European and North American planning traditions upon the Australian landscape, they neglect to mention some 40-50,000 years of Indigenous landscape planning initiatives and practice. The ancestral country of the Gunditjmara people is in the Western District of Victoria focused upon the Lake Condah and Mount Eccles localities. The Gunditjmara had, and continue to have a strong social, cultural and land management and planning presence in the region, in particular linked to environmental engineering initiatives and aquaculture curatorship of eel and fish resources. Archaeological evidence confirms that some 10,000 years of pre-European contact landscape planning practice has been applied by the Gunditjmara to construct resources management infrastructure to service a regional food need as well as a community need. Within contemporary reconciliation discourses, the Gunditjmara have activity sought over the last 25 years the rehabilitation of Lake Condah, which is now coming into fruition, and the restoration of their traditional landscape planning and management responsibilities. This paper reviews the restoration of Indigenous landscape planning and management theory and practice by the Gunditjmara, pointing to significant policy and practice success as well as the need to better appreciate this culturally-attuned and ecologically-responsive approach to landscape planning borne out of generations of knowledge.

Gadamer and political authority

The rehabilitation of the concept of authority is one of the more contentious positions advocated by Gadamer in Truth and Method (1960). Habermas in particular challenged the universality of Gadamer’s hermeneutic project by presenting this rehabilitation as a conservative legitimation of prevailing prejudices which truncates the role of critical reflection. Given that Gadamer’s primary focus is upon the ramifications of the Enlightenment dichotomy between reason and authority for historical hermeneutics, however, and that his examples are drawn primarily from educational domains, the extent to which his account of authority sustains a political interpretation is far from self-evident. In this article I argue that Gadamer’s account can nonetheless make at least two important contributions to contemporary philosophical debates on political authority. Following a brief exposition of Gadamer’s account of authority in Truth and Method, I examine his suggestion that the basis of legitimate political authority is to be found in the normative status of the right to be authoritative, rather than in the factual status of being in a position of authority. This account, I suggest, places in question the abstract dichotomy between theoretical and practical authority which informs much contemporary debate on political authority. I then demonstrate how Gadamer’s emphasis upon the historicity of tradition offers important insights for discussions of the relation between political authority and moral autonomy.

High volume versus low volume balance training on postural sway in adults with previous ankle inversion injury

Balance training is commonly used in the rehabilitation process of ankle injuries; however, the exercise prescription guidelines for prescribing balance training are poorly understood. The aim of the present study was to determine if high or low volume balance training is more effective in improving postural sway after an 8 week balance training program utilising the same exercises. Seventeen subjects (14 male, 3 female) with a mean age of 24.06 ± 5.6 years were randomly allocated into a control group (CG), low volume training (LVT) or high volume training (HVT). All subjects had sustained at least two inversion ankle injuries within the last 18 months. Subjects completed 8 weeks of balance training of up to 30 mins duration, 3 times per week. LVT consisted of 40 repetitions for week 1, progressing to 90 repetitions by week 8. HVT consisted of 60 repetitions for week 1, progressing to 130 repetitions by week 8. The maximum centre of pressure (COP) excursion was obtained from the porce plate in the medial-lateral (ML) direction and subsequently used for pre-test and post-test analysis. After the 8 week training intervention, there was a significant (P<0.001) difference in postural sway between pre and post testing for both the LVT (pre = 88.69mm ± 25.08mm, post = 72.17mm ± 27.53mm) and HVT (pre = 77.47mm ±10.57mm, post = 58.54mm ± 7.01mm) groups. There was no significant (P>0.01) difference detected for improvements between the LVT and HVT, however reported effect sizes (ES) showed large effect size chances in the high volume training (ES = 1.7) whereas low volume training showed medium effect sizes changes (ES = 0.6). This preliminary study demonstrates the importance of training volume in the rehabilitation of ankle injuries, with the HVT being superior to LVT.

Nordic policy lessons for Australia

This report considers public debate on Scandinavian and Finnish policy ideas of possible relevance to Australia since the publication in November 2014 by an Australian university press of Andrew Scott’s book Northern Lights: The Positive Policy Example of Sweden, Finland, Denmark and Norway. Two years on from the book’s publication, the report considers the varying reception in Australia of propositions advanced in Northern Lights for: expansion of public early childhood education and care and extension of paid parental leave, as well as properly enshrining children’s rights and other actions to reduce child poverty and improve children’s wellbeing (learning from Sweden); more equitable schools funding, better valuing of a quality teaching profession and more effective provision of vocational education in schools (learning from Finland); enhancement of support and skills retraining for mature-age workers displaced by job losses (learning from Denmark); and increasing revenue including through greater taxation and regulation of natural resource wealth (learning from Norway). The report then considers the main priority areas of Nordic achievement nominated by policy actors for additional consideration for Australia to now learn from. These are: better, healthier and more natural urban design, together with more balanced regional development; better workplace design – specifically the importance of taking into account aesthetics, ergonomics and nature in people’s workplace environments; and greater emphasis on both the prevention of crime and the rehabilitation of persons convicted of crimes. Sweden and Norway’s continuing leadership in the provision of quality foreign aid and other foreign policy initiatives such as Sweden's current “feminist foreign policy” are also discussed. Objections raised to the book’s premises, including to the possibility of policy transfer to Australia from nations presumed to be less multicultural, are evaluated.