Tracking a century of change in trophic structure and dynamics in a floodplain wetland: Integrating palaeoecological and palaeoisotopic evidence
- Kattel, Giri, Gell, Peter, Perga, Marie-Elodie, Jeppesen, Erik, Grundell, Rosie, Weller, Sandra, Zawadzki, Atun, Barry, Linda
- Authors: Kattel, Giri , Gell, Peter , Perga, Marie-Elodie , Jeppesen, Erik , Grundell, Rosie , Weller, Sandra , Zawadzki, Atun , Barry, Linda
- Date: 2015
- Type: Text , Journal article
- Relation: Freshwater Biology Vol. 60, no. 4 (2015), p. 711-723
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- Description: The palaeoecological assessment, and the use of stable isotopes of carbon in subfossils of herbivores and omnivores, represents a novel approach to understand transitions in past food-web structure and the dynamics of lake ecosystems in response to natural perturbations and human impacts. Combined with records of subfossil assemblages of cladocerans and chironomids, it may be possible to decipher whether changes are attributable to external forces or internally derived system shifts. A sediment record taken from the shallow (2.3 m depth) Kings Billabong in the River Murray floodplain (Australia) was analysed to explore changes in trophic dynamics over the past century. The palaeoecological assessment revealed that littoral assemblages of cladocerans and benthic diatoms were gradually replaced by planktonic (planktonic and facultative planktonic) assemblages after river regulation in the 1920s. The stable isotopic composition of carbon (
- Authors: Kattel, Giri , Gell, Peter , Perga, Marie-Elodie , Jeppesen, Erik , Grundell, Rosie , Weller, Sandra , Zawadzki, Atun , Barry, Linda
- Date: 2015
- Type: Text , Journal article
- Relation: Freshwater Biology Vol. 60, no. 4 (2015), p. 711-723
- Full Text:
- Reviewed:
- Description: The palaeoecological assessment, and the use of stable isotopes of carbon in subfossils of herbivores and omnivores, represents a novel approach to understand transitions in past food-web structure and the dynamics of lake ecosystems in response to natural perturbations and human impacts. Combined with records of subfossil assemblages of cladocerans and chironomids, it may be possible to decipher whether changes are attributable to external forces or internally derived system shifts. A sediment record taken from the shallow (2.3 m depth) Kings Billabong in the River Murray floodplain (Australia) was analysed to explore changes in trophic dynamics over the past century. The palaeoecological assessment revealed that littoral assemblages of cladocerans and benthic diatoms were gradually replaced by planktonic (planktonic and facultative planktonic) assemblages after river regulation in the 1920s. The stable isotopic composition of carbon (
Immunohistochemical analysis of pancreatic islets of platypus (Ornithorhynchus anatinus) and echidna (Tachyglossus aculeatus ssp.)
- He, Chuan, Myers, Mark, Forbes, Briony, Grützner, Frank
- Authors: He, Chuan , Myers, Mark , Forbes, Briony , Grützner, Frank
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Anatomy Vol. 226, no. 4 (2015), p. 373-380
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- Description: Monotremes have undergone remarkable changes to their digestive and metabolic control system; however, the monotreme pancreas remains poorly characterized. Previous work in echidna demonstrated the presence of pancreatic islets, but no information is available for platypus and the fine structure has not been described for either monotreme. Based on our recent finding that monotremes lack the ghrelin gene, which is expressed in mouse and human pancreatic islets, we investigated the structure of monotreme islets in more detail. Generally, as in birds, the islets of monotremes were smaller but greater in number compared with mouse. b-cells were the most abundant endocrine cell population in platypus islets and were located peripherally, while a-cells were observed both in the interior and periphery of the islets. d-cells and pancreatic polypeptide (PP)-cells were mainly found in the islet periphery. Distinct PP-rich (PP-lobe) and PP-poor areas (non-PP-lobe) are present in therian mammals, and we identified these areas in echidna but not platypus pancreas. Interestingly, in some of the echidna islets, a- and b-cells tended to form two poles within the islets, which to our knowledge is the first time this has been observed in any species. Overall, monotreme pancreata share the feature of consisting of distinct PP-poor and PP-rich islets with other mammals. A higher number of islets and a- or b-cell only islets are shared between monotremes and birds. The islets of monotremes were larger than those of birds but smaller compared with therian mammals. This may indicate a trend of having fewer larger islets comprising several endocrine cell types during mammalian evolution. © 2015 Anatomical Society.
- Authors: He, Chuan , Myers, Mark , Forbes, Briony , Grützner, Frank
- Date: 2015
- Type: Text , Journal article
- Relation: Journal of Anatomy Vol. 226, no. 4 (2015), p. 373-380
- Full Text:
- Reviewed:
- Description: Monotremes have undergone remarkable changes to their digestive and metabolic control system; however, the monotreme pancreas remains poorly characterized. Previous work in echidna demonstrated the presence of pancreatic islets, but no information is available for platypus and the fine structure has not been described for either monotreme. Based on our recent finding that monotremes lack the ghrelin gene, which is expressed in mouse and human pancreatic islets, we investigated the structure of monotreme islets in more detail. Generally, as in birds, the islets of monotremes were smaller but greater in number compared with mouse. b-cells were the most abundant endocrine cell population in platypus islets and were located peripherally, while a-cells were observed both in the interior and periphery of the islets. d-cells and pancreatic polypeptide (PP)-cells were mainly found in the islet periphery. Distinct PP-rich (PP-lobe) and PP-poor areas (non-PP-lobe) are present in therian mammals, and we identified these areas in echidna but not platypus pancreas. Interestingly, in some of the echidna islets, a- and b-cells tended to form two poles within the islets, which to our knowledge is the first time this has been observed in any species. Overall, monotreme pancreata share the feature of consisting of distinct PP-poor and PP-rich islets with other mammals. A higher number of islets and a- or b-cell only islets are shared between monotremes and birds. The islets of monotremes were larger than those of birds but smaller compared with therian mammals. This may indicate a trend of having fewer larger islets comprising several endocrine cell types during mammalian evolution. © 2015 Anatomical Society.
Factors contributing to COPD hospitalisations from 2010 to 2015 : Variation among rural and metropolitan Australians
- Terry, Daniel, Nguyen, Hoang, Kim, Jeong-Ah, Islam, Rafiqul
- Authors: Terry, Daniel , Nguyen, Hoang , Kim, Jeong-Ah , Islam, Rafiqul
- Date: 2019
- Type: Text , Journal article
- Relation: Clinical Respiratory Journal Vol. 13, no. 5 (2019), p. 306-313
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- Description: Introduction: Rural and remote populations experience the greatest burden of chronic obstructive pulmonary disease (COPD), the fifth leading cause of death in Australia. Currently there is a need to prioritise health services to improve health outcomes among those at higher risk of COPD. Objectives: To investigate the differences in COPD hospitalisation between rural and urban populations and determine predictive factors contributing to COPD hospitalisation. Methods: Statewide hospitalisation data from 2010 to 2015 were obtained through the Victorian Admitted Episodes Dataset and other key data sets. The rates of hospitalisation were analysed using hierarchical multiple regression to examine the association between COPD hospitalisations and a number of predictor variables. Results: The highest COPD incidence occurred in metropolitan males aged 85 years of age and older (35.092 hospitalisations per 1000 population). Among metropolitan residents, smoking, population density and household income had a significant association with COPD hospitalisations for both sexes. Among rural males, smoking rates, household income and rural land use (farming) were significant predictors of COPD hospitalisations. There was an overall stability in statewide COPD hospitalisation over the 5 years to 2015, P = 0.420. Conclusion: This investigation highlights many rural and regional areas have much lower COPD hospitalisation rates than metropolitan areas. Between males and females, there are heterogenetic factors that contribute to the significant variation associated with COPD hospitalisation in metropolitan and rural areas, such as rural land use among rural males. This indicates that risk factor assessments, beyond smoking alone, need to be individualised and prioritised in practice to optimise care.
- Authors: Terry, Daniel , Nguyen, Hoang , Kim, Jeong-Ah , Islam, Rafiqul
- Date: 2019
- Type: Text , Journal article
- Relation: Clinical Respiratory Journal Vol. 13, no. 5 (2019), p. 306-313
- Full Text:
- Reviewed:
- Description: Introduction: Rural and remote populations experience the greatest burden of chronic obstructive pulmonary disease (COPD), the fifth leading cause of death in Australia. Currently there is a need to prioritise health services to improve health outcomes among those at higher risk of COPD. Objectives: To investigate the differences in COPD hospitalisation between rural and urban populations and determine predictive factors contributing to COPD hospitalisation. Methods: Statewide hospitalisation data from 2010 to 2015 were obtained through the Victorian Admitted Episodes Dataset and other key data sets. The rates of hospitalisation were analysed using hierarchical multiple regression to examine the association between COPD hospitalisations and a number of predictor variables. Results: The highest COPD incidence occurred in metropolitan males aged 85 years of age and older (35.092 hospitalisations per 1000 population). Among metropolitan residents, smoking, population density and household income had a significant association with COPD hospitalisations for both sexes. Among rural males, smoking rates, household income and rural land use (farming) were significant predictors of COPD hospitalisations. There was an overall stability in statewide COPD hospitalisation over the 5 years to 2015, P = 0.420. Conclusion: This investigation highlights many rural and regional areas have much lower COPD hospitalisation rates than metropolitan areas. Between males and females, there are heterogenetic factors that contribute to the significant variation associated with COPD hospitalisation in metropolitan and rural areas, such as rural land use among rural males. This indicates that risk factor assessments, beyond smoking alone, need to be individualised and prioritised in practice to optimise care.
A systematic review and meta-analysis of factors that relate to aggression perpetrated against nurses by patients/relatives or staff
- Edward, Karen-Leigh, Stephenson, John, Ousey, Karen, Lui, Steve, Warelow, Philip, Giandinoto, Jo-Anne
- Authors: Edward, Karen-Leigh , Stephenson, John , Ousey, Karen , Lui, Steve , Warelow, Philip , Giandinoto, Jo-Anne
- Date: 2016
- Type: Text , Journal article
- Relation: Journal of Clinical Nursing Vol. 25, no. 3-4 (2016), p. 289-299
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- Description: Aims and objectives: The aim of this meta-analysis was to identify the factors that related to aggression (verbal abuse or physical abuse/assault) perpetrated against the nurse or other health professionals by patients/relatives or staff. In the light of the paucity of systematic reviews on this common issue in nursing, the objective was to present a comprehensive systematic review and meta-analysis of these papers. Background: Aggression towards nurses is common around the world and can be the impetus for nurses leaving the profession or developing anxiety when working in particular settings. Design: Systematic review with meta-analysis. Methods: Meta-analyses were conducted to assess the effect of the factors of gender and context (dichotomised as mental health/psychiatric or nonmental health/psychiatric). The databases of Medline (1966-2015), CINAHL (1982-2015) and PsychInfo (1920-2015). Results: A total of 1571 papers were screened by two reviewers. At the final decision 14 were selected for analysis. A higher proportion of female nurses than male nurses were reported to be the victims of verbal abuse, with the difference in proportions being statistically significant. A statistically significant higher proportion of male nurses than female nurses were reported to be the victims of physical abuse. There was a significantly higher proportion of mental health nurses reported experiencing physical abuse as compared to nonmental health nurses. Conclusions: The analysis reveal female nurses have greater odds of verbal abuse than male nurses and male nurses have greater odds of physical abuse than female nurses. Overall mental health nurses had three times higher odds of physical assault than other nurses. © 2016 John Wiley & Sons Ltd.
- Authors: Edward, Karen-Leigh , Stephenson, John , Ousey, Karen , Lui, Steve , Warelow, Philip , Giandinoto, Jo-Anne
- Date: 2016
- Type: Text , Journal article
- Relation: Journal of Clinical Nursing Vol. 25, no. 3-4 (2016), p. 289-299
- Full Text:
- Reviewed:
- Description: Aims and objectives: The aim of this meta-analysis was to identify the factors that related to aggression (verbal abuse or physical abuse/assault) perpetrated against the nurse or other health professionals by patients/relatives or staff. In the light of the paucity of systematic reviews on this common issue in nursing, the objective was to present a comprehensive systematic review and meta-analysis of these papers. Background: Aggression towards nurses is common around the world and can be the impetus for nurses leaving the profession or developing anxiety when working in particular settings. Design: Systematic review with meta-analysis. Methods: Meta-analyses were conducted to assess the effect of the factors of gender and context (dichotomised as mental health/psychiatric or nonmental health/psychiatric). The databases of Medline (1966-2015), CINAHL (1982-2015) and PsychInfo (1920-2015). Results: A total of 1571 papers were screened by two reviewers. At the final decision 14 were selected for analysis. A higher proportion of female nurses than male nurses were reported to be the victims of verbal abuse, with the difference in proportions being statistically significant. A statistically significant higher proportion of male nurses than female nurses were reported to be the victims of physical abuse. There was a significantly higher proportion of mental health nurses reported experiencing physical abuse as compared to nonmental health nurses. Conclusions: The analysis reveal female nurses have greater odds of verbal abuse than male nurses and male nurses have greater odds of physical abuse than female nurses. Overall mental health nurses had three times higher odds of physical assault than other nurses. © 2016 John Wiley & Sons Ltd.
Biogeochemical responses to holocene catchment-lake dynamics in the Tasmanian World Heritage Area, Australia
- Mariani, Michela, Beck, Kristen, Fletcher, Michael-Shawn, Gell, Peter, Saunders, Krystyna, Gadd, Patricia, Chisari, Robert
- Authors: Mariani, Michela , Beck, Kristen , Fletcher, Michael-Shawn , Gell, Peter , Saunders, Krystyna , Gadd, Patricia , Chisari, Robert
- Date: 2018
- Type: Text , Journal article
- Relation: Journal of Geophysical Research: Biogeosciences Vol. 123, no. 5 (2018), p. 1610-1624
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- Description: Environmental changes such as climate, land use, and fire activity affect terrestrial and aquatic ecosystems at multiple scales of space and time. Due to the nature of the interactions between terrestrial and aquatic dynamics, an integrated study using multiple proxies is critical for a better understanding of climate- and fire-driven impacts on environmental change. Here we present a synthesis of biological and geochemical data (pollen, spores, diatoms, micro X-ray fluorescence scanning, CN content, and stable isotopes) from Dove Lake, Tasmania, allowing us to disentangle long-term terrestrial-aquatic dynamics through the last 12 kyear. We found that aquatic dynamics at Dove Lake are tightly linked to vegetation shifts dictated by regional hydroclimatic variability in western Tasmania. A major shift in the diatom composition was detected at ca. 6 ka, and it was likely mediated by changes in regional terrestrial vegetation, charcoal, and iron accumulation. High rainforest abundance prior ca. 6 ka is linked to increased terrestrially derived organic matter delivery into the lake, higher dystrophy, anoxic bottom conditions, and lower light penetration depths. The shift to a landscape with a higher proportion of sclerophyll species following the intensification of El Niño-Southern Oscillation since ca. 6 ka corresponds to a decline in terrestrial organic matter input into Dove Lake, lower dystrophy levels, higher oxygen availability, and higher light availability for algae and littoral macrophytes. This record provides new insights on terrestrial-aquatic dynamics that could contribute to the conservation management plans in the Tasmanian World Heritage Area and in temperate high-altitude dystrophic systems elsewhere.
- Authors: Mariani, Michela , Beck, Kristen , Fletcher, Michael-Shawn , Gell, Peter , Saunders, Krystyna , Gadd, Patricia , Chisari, Robert
- Date: 2018
- Type: Text , Journal article
- Relation: Journal of Geophysical Research: Biogeosciences Vol. 123, no. 5 (2018), p. 1610-1624
- Full Text:
- Reviewed:
- Description: Environmental changes such as climate, land use, and fire activity affect terrestrial and aquatic ecosystems at multiple scales of space and time. Due to the nature of the interactions between terrestrial and aquatic dynamics, an integrated study using multiple proxies is critical for a better understanding of climate- and fire-driven impacts on environmental change. Here we present a synthesis of biological and geochemical data (pollen, spores, diatoms, micro X-ray fluorescence scanning, CN content, and stable isotopes) from Dove Lake, Tasmania, allowing us to disentangle long-term terrestrial-aquatic dynamics through the last 12 kyear. We found that aquatic dynamics at Dove Lake are tightly linked to vegetation shifts dictated by regional hydroclimatic variability in western Tasmania. A major shift in the diatom composition was detected at ca. 6 ka, and it was likely mediated by changes in regional terrestrial vegetation, charcoal, and iron accumulation. High rainforest abundance prior ca. 6 ka is linked to increased terrestrially derived organic matter delivery into the lake, higher dystrophy, anoxic bottom conditions, and lower light penetration depths. The shift to a landscape with a higher proportion of sclerophyll species following the intensification of El Niño-Southern Oscillation since ca. 6 ka corresponds to a decline in terrestrial organic matter input into Dove Lake, lower dystrophy levels, higher oxygen availability, and higher light availability for algae and littoral macrophytes. This record provides new insights on terrestrial-aquatic dynamics that could contribute to the conservation management plans in the Tasmanian World Heritage Area and in temperate high-altitude dystrophic systems elsewhere.
Lamin A/C-dependent interaction with 53BP1 promotes cellular responses to DNA damage
- Gibbs-Seymour, Ian, Markiewicz, Ewa, Bekker-Jensen, Simon, Mailand, Niels, Hutchison, Chris
- Authors: Gibbs-Seymour, Ian , Markiewicz, Ewa , Bekker-Jensen, Simon , Mailand, Niels , Hutchison, Chris
- Date: 2015
- Type: Text , Journal article
- Relation: Aging Cell Vol. 14, no. 2 (2015), p. 162-169
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- Description: Lamins A/C have been implicated in DNA damage response pathways. We show that the DNA repair protein 53BP1 is a lamin A/C binding protein. In undamaged human dermal fibroblasts (HDF), 53BP1 is a nucleoskeleton protein. 53BP1 binds to lamins A/C via its Tudor domain, and this is abrogated by DNA damage. Lamins A/C regulate 53BP1 levels and consequently lamin A/C-null HDF display a 53BP1 null-like phenotype. Our data favour a model in which lamins A/C maintain a nucleoplasmic pool of 53BP1 in order to facilitate its rapid recruitment to sites of DNA damage and could explain why an absence of lamin A/C accelerates aging. © 2014 The Authors. Aging Cell published by the Anatomical Society and John Wiley & Sons Ltd.
- Authors: Gibbs-Seymour, Ian , Markiewicz, Ewa , Bekker-Jensen, Simon , Mailand, Niels , Hutchison, Chris
- Date: 2015
- Type: Text , Journal article
- Relation: Aging Cell Vol. 14, no. 2 (2015), p. 162-169
- Full Text:
- Reviewed:
- Description: Lamins A/C have been implicated in DNA damage response pathways. We show that the DNA repair protein 53BP1 is a lamin A/C binding protein. In undamaged human dermal fibroblasts (HDF), 53BP1 is a nucleoskeleton protein. 53BP1 binds to lamins A/C via its Tudor domain, and this is abrogated by DNA damage. Lamins A/C regulate 53BP1 levels and consequently lamin A/C-null HDF display a 53BP1 null-like phenotype. Our data favour a model in which lamins A/C maintain a nucleoplasmic pool of 53BP1 in order to facilitate its rapid recruitment to sites of DNA damage and could explain why an absence of lamin A/C accelerates aging. © 2014 The Authors. Aging Cell published by the Anatomical Society and John Wiley & Sons Ltd.
Patients with both langerhans cell histiocytosis and crohn’s disease highlight a common role of interleukin-23
- Kvedaraite, Egle, Lourda, Magda, Han, Hong, Tesi, Biance, Mitchell, Jenée
- Authors: Kvedaraite, Egle , Lourda, Magda , Han, Hong , Tesi, Biance , Mitchell, Jenée
- Date: 2021
- Type: Text , Journal article
- Relation: Acta Paediatrica, International Journal of Paediatrics Vol. 110, no. 4 (2021), p. 1315-1321
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- Description: Aim: To present the first case series of patients with Langerhans cell histiocytosis (LCH) also affected by Crohn's disease (CD), both of which are granulomatous diseases, and in LCH investigate the role of interleukin (IL)-23, which is a well-described disease mediator in CD. Methods: A case series of three patients with LCH and CD were described; a cohort of LCH patients (n = 55) as well as controls (n = 55) were analysed for circulating IL-23 levels; and the relation between the percentage of LCH cells in lesions and circulating IL-23 levels was analysed in seven LCH patients. Results: Differential diagnostic challenges for these two granulomatous diseases were highlighted in the case series, and it took up to 3 years to diagnose CD. Elevated IL-23 levels were found in LCH patients. The amount of lesional LCH cells correlated with the levels of circulating IL-23. Conclusion: Both CD and LCH should be considered in patients with inflammatory gastrointestinal involvement. The IL-23 pathway is a common immunological trait between these two granulomatous diseases. ©2020 The Authors. Acta Paediatrica published by John Wiley & Sons Ltd on behalf of Foundation Acta Paediatrica. ***Please note that there are multiple authors for this article therefore only the name of the first 5 including Federation University Australia affiliate “Jenée Mitchell” is provided in this record***
- Authors: Kvedaraite, Egle , Lourda, Magda , Han, Hong , Tesi, Biance , Mitchell, Jenée
- Date: 2021
- Type: Text , Journal article
- Relation: Acta Paediatrica, International Journal of Paediatrics Vol. 110, no. 4 (2021), p. 1315-1321
- Full Text:
- Reviewed:
- Description: Aim: To present the first case series of patients with Langerhans cell histiocytosis (LCH) also affected by Crohn's disease (CD), both of which are granulomatous diseases, and in LCH investigate the role of interleukin (IL)-23, which is a well-described disease mediator in CD. Methods: A case series of three patients with LCH and CD were described; a cohort of LCH patients (n = 55) as well as controls (n = 55) were analysed for circulating IL-23 levels; and the relation between the percentage of LCH cells in lesions and circulating IL-23 levels was analysed in seven LCH patients. Results: Differential diagnostic challenges for these two granulomatous diseases were highlighted in the case series, and it took up to 3 years to diagnose CD. Elevated IL-23 levels were found in LCH patients. The amount of lesional LCH cells correlated with the levels of circulating IL-23. Conclusion: Both CD and LCH should be considered in patients with inflammatory gastrointestinal involvement. The IL-23 pathway is a common immunological trait between these two granulomatous diseases. ©2020 The Authors. Acta Paediatrica published by John Wiley & Sons Ltd on behalf of Foundation Acta Paediatrica. ***Please note that there are multiple authors for this article therefore only the name of the first 5 including Federation University Australia affiliate “Jenée Mitchell” is provided in this record***
Employer training in Australia : Current practices and concerns
- Smith, Erica, Callan, Victor, Tuck, Jacquiline, Smith, Andy
- Authors: Smith, Erica , Callan, Victor , Tuck, Jacquiline , Smith, Andy
- Date: 2019
- Type: Text , Journal article
- Relation: International Journal of Training and Development Vol. 23, no. 2 (2019), p. 169-183
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- Description: This paper presents and analyses results from a research project on current trends in employer training in Australia. While the formal vocational education and training (VET) system is well-researched, the everyday training that happens in workplaces is relatively under-researched in Australia. Using some of the results of an employer survey undertaken in 2015, the paper describes and analyses employer-based training across a range of industry areas. The survey included groups of questions on a range of matters, including the reasons why employers train, and how these relate to employers' perceptions of their operating environment, and the structures they have in place to manage and organize training. Detailed data are provided about three specific forms of training: in-house training and learning; the use that employers make of external providers of training; and employers' use of nationally recognised training - training from the VET system. Finally the paper reports what managers said about the barriers to providing more training. The paper analyses the findings in relation to the literature and also identified changes over time in training practices in Australian companies. Implications for training policy and practice, as well as for future research, are identified.
- Authors: Smith, Erica , Callan, Victor , Tuck, Jacquiline , Smith, Andy
- Date: 2019
- Type: Text , Journal article
- Relation: International Journal of Training and Development Vol. 23, no. 2 (2019), p. 169-183
- Full Text:
- Reviewed:
- Description: This paper presents and analyses results from a research project on current trends in employer training in Australia. While the formal vocational education and training (VET) system is well-researched, the everyday training that happens in workplaces is relatively under-researched in Australia. Using some of the results of an employer survey undertaken in 2015, the paper describes and analyses employer-based training across a range of industry areas. The survey included groups of questions on a range of matters, including the reasons why employers train, and how these relate to employers' perceptions of their operating environment, and the structures they have in place to manage and organize training. Detailed data are provided about three specific forms of training: in-house training and learning; the use that employers make of external providers of training; and employers' use of nationally recognised training - training from the VET system. Finally the paper reports what managers said about the barriers to providing more training. The paper analyses the findings in relation to the literature and also identified changes over time in training practices in Australian companies. Implications for training policy and practice, as well as for future research, are identified.
Communities of practice : a systematic review and meta-synthesis of what it means and how it really works among nursing students and novices
- Terry, Daniel, Nguyen, Hoang, Peck, Blake, Smith, Andrew, Phan, Hoang
- Authors: Terry, Daniel , Nguyen, Hoang , Peck, Blake , Smith, Andrew , Phan, Hoang
- Date: 2020
- Type: Text , Journal article , Review
- Relation: Journal of Clinical Nursing Vol. 29, no. 3-4 (2020), p. 370-380
- Full Text:
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- Description: Aims and objectives: To evaluate the enablers, barriers and impact that communities of practice have on novice nurses and students learning to become registered nurses. Background: Communities of practice have formed the basis for conceptualising the process of learning that occurs among groups of people within a place of work—a mainstay of healthcare practice. There is a dearth of literature that focuses specifically on the outcomes from student and novice engagement with existing communities of practice. Design: Systematic review and Meta-synthesis. Methods: MEDLINE, PubMed, EMBASE, CINAHL, ProQuest, Scopus and PsycINFO databases were accessed between 1997–2019. The screening and selection of studies were based on eligibility criteria and methodological quality assessment using the Critical Appraisal Skills Programme tool for qualitative research. Meta-synthesis was grounded in the original experiences and collectively synthesised into meaningful themes. The review follows the PRISMA reporting guidelines and PRISMA checklist. Results: The findings highlight three major themes and included enablers for successful communities of practice, barriers to successful communities of practice, and success in action as described by students and novice nurses. Discussion: We suggest successful communities of practice occur when safe and supported spaces ensure students and novices feel comfortable to experiment with their learning, and we emphasise the benefits of having more novice nurses situated within close proximity and under the direct influence of the established practices of more experienced or core group of peers. Relevance to clinical practice: Communities of practice that function successfully create an environment that prioritises the embedding of novices into the broader group. In so doing, students and novice nurses feel supported, welcomed, empowered, and able to make the transition from student to colleague and novice nurse to more experienced nurse. It allows them to experiment with ever new ways of fulfilling the role, while aiding better clinical outcomes. © 2019 John Wiley & Sons Ltd
- Authors: Terry, Daniel , Nguyen, Hoang , Peck, Blake , Smith, Andrew , Phan, Hoang
- Date: 2020
- Type: Text , Journal article , Review
- Relation: Journal of Clinical Nursing Vol. 29, no. 3-4 (2020), p. 370-380
- Full Text:
- Reviewed:
- Description: Aims and objectives: To evaluate the enablers, barriers and impact that communities of practice have on novice nurses and students learning to become registered nurses. Background: Communities of practice have formed the basis for conceptualising the process of learning that occurs among groups of people within a place of work—a mainstay of healthcare practice. There is a dearth of literature that focuses specifically on the outcomes from student and novice engagement with existing communities of practice. Design: Systematic review and Meta-synthesis. Methods: MEDLINE, PubMed, EMBASE, CINAHL, ProQuest, Scopus and PsycINFO databases were accessed between 1997–2019. The screening and selection of studies were based on eligibility criteria and methodological quality assessment using the Critical Appraisal Skills Programme tool for qualitative research. Meta-synthesis was grounded in the original experiences and collectively synthesised into meaningful themes. The review follows the PRISMA reporting guidelines and PRISMA checklist. Results: The findings highlight three major themes and included enablers for successful communities of practice, barriers to successful communities of practice, and success in action as described by students and novice nurses. Discussion: We suggest successful communities of practice occur when safe and supported spaces ensure students and novices feel comfortable to experiment with their learning, and we emphasise the benefits of having more novice nurses situated within close proximity and under the direct influence of the established practices of more experienced or core group of peers. Relevance to clinical practice: Communities of practice that function successfully create an environment that prioritises the embedding of novices into the broader group. In so doing, students and novice nurses feel supported, welcomed, empowered, and able to make the transition from student to colleague and novice nurse to more experienced nurse. It allows them to experiment with ever new ways of fulfilling the role, while aiding better clinical outcomes. © 2019 John Wiley & Sons Ltd
Accounting for cryptic population substructure enhances detection of inbreeding depression with genomic inbreeding coefficients: an example from a critically endangered marsupial
- Zilko, Joseph, Harley, Dan, Hansen, Birgita, Pavlova, Alexandra, Sunnucks, Paul
- Authors: Zilko, Joseph , Harley, Dan , Hansen, Birgita , Pavlova, Alexandra , Sunnucks, Paul
- Date: 2020
- Type: Text , Journal article
- Relation: Molecular Ecology Vol. 29, no. 16 (2020), p. 2978-2993
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- Description: Characterizing inbreeding depression in wildlife populations can be critical to their conservation. Coefficients of individual inbreeding can be estimated from genome-wide marker data. The degree to which sensitivity of inbreeding coefficients to population genetic substructure alters estimates of inbreeding depression in wild populations is not well understood. Using generalized linear models, we tested the power of two frequently used inbreeding coefficients that are calculated from genome-wide SNP markers, FH and F^III, to predict four fitness traits estimated over two decades in an isolated population of the critically endangered Leadbeater's possum. FH estimates inbreeding as excess observed homozygotes relative to equilibrium expectations, whereas F^III quantifies allelic similarity between the gametes that formed an individual, and upweights rare homozygotes. We estimated FH and F^III from 1,575 genome-wide SNP loci in individuals with fitness trait data (N = 179–237 per trait), and computed revised coefficients, FHby group and F^IIIby group, adjusted for population genetic substructure by calculating them separately within two different genetic groups of individuals identified in the population. Using FH or F^III in the models, inbreeding depression was detected for survival to sexual maturity, longevity and whether individuals bred during their lifetime. F^IIIby group (but not FHby group) additionally revealed significant inbreeding depression for lifetime reproductive output (total offspring assigned to each individual). Estimates of numbers of lethal equivalents indicated substantial inbreeding load, but differing between inbreeding estimators. Inbreeding depression, declining population size, and low and declining genetic diversity suggest that genetic rescue may assist in preventing extinction of this unique Leadbeater's possum population. © 2020 John Wiley & Sons Ltd
- Authors: Zilko, Joseph , Harley, Dan , Hansen, Birgita , Pavlova, Alexandra , Sunnucks, Paul
- Date: 2020
- Type: Text , Journal article
- Relation: Molecular Ecology Vol. 29, no. 16 (2020), p. 2978-2993
- Full Text:
- Reviewed:
- Description: Characterizing inbreeding depression in wildlife populations can be critical to their conservation. Coefficients of individual inbreeding can be estimated from genome-wide marker data. The degree to which sensitivity of inbreeding coefficients to population genetic substructure alters estimates of inbreeding depression in wild populations is not well understood. Using generalized linear models, we tested the power of two frequently used inbreeding coefficients that are calculated from genome-wide SNP markers, FH and F^III, to predict four fitness traits estimated over two decades in an isolated population of the critically endangered Leadbeater's possum. FH estimates inbreeding as excess observed homozygotes relative to equilibrium expectations, whereas F^III quantifies allelic similarity between the gametes that formed an individual, and upweights rare homozygotes. We estimated FH and F^III from 1,575 genome-wide SNP loci in individuals with fitness trait data (N = 179–237 per trait), and computed revised coefficients, FHby group and F^IIIby group, adjusted for population genetic substructure by calculating them separately within two different genetic groups of individuals identified in the population. Using FH or F^III in the models, inbreeding depression was detected for survival to sexual maturity, longevity and whether individuals bred during their lifetime. F^IIIby group (but not FHby group) additionally revealed significant inbreeding depression for lifetime reproductive output (total offspring assigned to each individual). Estimates of numbers of lethal equivalents indicated substantial inbreeding load, but differing between inbreeding estimators. Inbreeding depression, declining population size, and low and declining genetic diversity suggest that genetic rescue may assist in preventing extinction of this unique Leadbeater's possum population. © 2020 John Wiley & Sons Ltd
Apprenticeships and ‘future work’ : are we ready?
- Authors: Smith, Erica
- Date: 2019
- Type: Text , Journal article
- Relation: International Journal of Training and Development Vol. 23, no. 1 (2019), p. 69-88
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- Description: The paper evaluates the readiness of apprenticeship systems to cope with five major developments affecting the future of work. The institution of apprenticeship has evolved over time in all countries, gradually adapting to changes in industrial processes, the economy, the labour market and education systems. This paper suggests, however, that recent changes in the economy and the labour market, and their concomitant effects on the likely future of work, have the potential to disrupt apprenticeship systems quite radically worldwide, and/or to make them less relevant in the 21st century. The paper draws on data from recent Australian and international research projects undertaken by the author, as well as the author’s engagement in Australian government exercises to discuss the future of apprenticeships. The research found that adaptations of systems and processes were being undertaken at company level and by stakeholders such as trade union or employer peak bodies. They were less frequently apparent, however, in government policy. The paper analyses the data to produce a framework of readiness for ‘future work’, but also queries whether adaptation of apprenticeship systems is necessarily desirable in all instances. Although the presence of multiple stakeholders in the system has previously been viewed as a strength of the system, it can also make even minor changes difficult to implement. This could prove to be a major impediment to apprenticeship’s future or could be a means of preserving its essential features. © 2019 Brian Towers (BRITOW) and John Wiley & Sons Ltd.
- Description: International Labour Organization, ILO with the assistance of the JP Morgan Chase Foundation.
- Authors: Smith, Erica
- Date: 2019
- Type: Text , Journal article
- Relation: International Journal of Training and Development Vol. 23, no. 1 (2019), p. 69-88
- Full Text:
- Reviewed:
- Description: The paper evaluates the readiness of apprenticeship systems to cope with five major developments affecting the future of work. The institution of apprenticeship has evolved over time in all countries, gradually adapting to changes in industrial processes, the economy, the labour market and education systems. This paper suggests, however, that recent changes in the economy and the labour market, and their concomitant effects on the likely future of work, have the potential to disrupt apprenticeship systems quite radically worldwide, and/or to make them less relevant in the 21st century. The paper draws on data from recent Australian and international research projects undertaken by the author, as well as the author’s engagement in Australian government exercises to discuss the future of apprenticeships. The research found that adaptations of systems and processes were being undertaken at company level and by stakeholders such as trade union or employer peak bodies. They were less frequently apparent, however, in government policy. The paper analyses the data to produce a framework of readiness for ‘future work’, but also queries whether adaptation of apprenticeship systems is necessarily desirable in all instances. Although the presence of multiple stakeholders in the system has previously been viewed as a strength of the system, it can also make even minor changes difficult to implement. This could prove to be a major impediment to apprenticeship’s future or could be a means of preserving its essential features. © 2019 Brian Towers (BRITOW) and John Wiley & Sons Ltd.
- Description: International Labour Organization, ILO with the assistance of the JP Morgan Chase Foundation.
Moral distinctions and structural inequality : homeless youth salvaging the self
- Farrugia, David, Smyth, John, Harrison, Tim
- Authors: Farrugia, David , Smyth, John , Harrison, Tim
- Date: 2016
- Type: Text , Journal article
- Relation: Sociological Review Vol. 64, no. 2 (2016), p. 238-255
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- Description: This paper explores the construction and contestation of moral distinctions as a dimension of contemporary structural inequality through a focus on the subjectivities constructed by young people who have experienced homelessness. Empirical material from two research projects shows that in young people's narratives of homelessness, material insecurity intertwines with the moral economies at work in neoliberal capitalist societies to construct homelessness as a state of moral disgrace, in which an ungovernable experience is experienced as a moral failure. When young people gain access to secure housing, the increasing stability and security of their lives is narrated in terms of a moral adherence to personal responsibility and disciplined conduct. Overall the paper describes an economy of worth organized around distinctions between order and chaos, self-governance and unruliness, morality and disgrace, which structures the experience of homelessness. As young people's position in relation to these moral ideals reflects the material conditions of their lives, their experiences demonstrate the way that moral hierarchies contribute to the existence and experience of structural inequalities in neoliberal capitalist societies. © 2016 The Editorial Board of The Sociological Review.
- Authors: Farrugia, David , Smyth, John , Harrison, Tim
- Date: 2016
- Type: Text , Journal article
- Relation: Sociological Review Vol. 64, no. 2 (2016), p. 238-255
- Full Text:
- Reviewed:
- Description: This paper explores the construction and contestation of moral distinctions as a dimension of contemporary structural inequality through a focus on the subjectivities constructed by young people who have experienced homelessness. Empirical material from two research projects shows that in young people's narratives of homelessness, material insecurity intertwines with the moral economies at work in neoliberal capitalist societies to construct homelessness as a state of moral disgrace, in which an ungovernable experience is experienced as a moral failure. When young people gain access to secure housing, the increasing stability and security of their lives is narrated in terms of a moral adherence to personal responsibility and disciplined conduct. Overall the paper describes an economy of worth organized around distinctions between order and chaos, self-governance and unruliness, morality and disgrace, which structures the experience of homelessness. As young people's position in relation to these moral ideals reflects the material conditions of their lives, their experiences demonstrate the way that moral hierarchies contribute to the existence and experience of structural inequalities in neoliberal capitalist societies. © 2016 The Editorial Board of The Sociological Review.
Exposing the impact of intensive advice services on health : a realist evaluation
- Dalkin, Sonia, Forster, Natalie, Hodgson, Philip, Lhussier, Monique, Philipson, Pete, Carr, Susan
- Authors: Dalkin, Sonia , Forster, Natalie , Hodgson, Philip , Lhussier, Monique , Philipson, Pete , Carr, Susan
- Date: 2019
- Type: Text , Journal article
- Relation: Health and Social Care in the Community Vol. 27, no. 3 (2019), p. 767-776
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- Description: Attention has turned to welfare advice as a potential health and social care intervention. However, establishing direct evidence of health impact has proven difficult. This is compounded by the need to understand both the facilitative contexts and mechanisms through which this impact occurs. This study investigated if, how and in which circumstances an intensive advice service had an impact on stress and well-being (as precursors to health impacts), for clients attending a branch of Citizens Advice, located in the North East of England. A mixed methods realist evaluation of three intensive advice services offered by Citizens Advice (CA) was operationalised in five phases: (a) Building programme theories, (b) refining programme theories, (c) Development of a data recording tool, (d) Testing programme theories with empirical data, (e) Impact interviews. This paper focuses on phase 4. The Warwick Edinburgh Mental Wellbeing Scale (WEMWBS) and Perceived Stress Scale (PSS) were completed by 191 clients, with a 91% follow-up rate (data collected: February 2016 to March 2017). Twenty-two CA clients participated in interviews (data collected: October 2015 to November 2016). The PSS indicated a significant decrease in stress from initial consultation to approximately 4–6 weeks post advice from 31.4 to 10.3 (p < 0.001) and the WEMWBS indicated a significant increase in client well-being from a mean of 26.9 to 46.5 (p < 0.001). Nine refined programme theories are presented which combine the qualitative and quantitative analysis; they are underpinned by three abstract theories: Capabilities model, The Decision to Trust Model, and Third Space. An explanatory framework is presented covering the micro, meso, and macro levels of CA. Use of a stress and well-being lens has allowed insight into the precursors of health in those receiving intensive advice. Using these measures whilst explaining contextual and mechanistic properties, begins to build a complex and real picture of how advice services impact on health. © 2018 John Wiley & Sons Ltd
- Authors: Dalkin, Sonia , Forster, Natalie , Hodgson, Philip , Lhussier, Monique , Philipson, Pete , Carr, Susan
- Date: 2019
- Type: Text , Journal article
- Relation: Health and Social Care in the Community Vol. 27, no. 3 (2019), p. 767-776
- Full Text:
- Reviewed:
- Description: Attention has turned to welfare advice as a potential health and social care intervention. However, establishing direct evidence of health impact has proven difficult. This is compounded by the need to understand both the facilitative contexts and mechanisms through which this impact occurs. This study investigated if, how and in which circumstances an intensive advice service had an impact on stress and well-being (as precursors to health impacts), for clients attending a branch of Citizens Advice, located in the North East of England. A mixed methods realist evaluation of three intensive advice services offered by Citizens Advice (CA) was operationalised in five phases: (a) Building programme theories, (b) refining programme theories, (c) Development of a data recording tool, (d) Testing programme theories with empirical data, (e) Impact interviews. This paper focuses on phase 4. The Warwick Edinburgh Mental Wellbeing Scale (WEMWBS) and Perceived Stress Scale (PSS) were completed by 191 clients, with a 91% follow-up rate (data collected: February 2016 to March 2017). Twenty-two CA clients participated in interviews (data collected: October 2015 to November 2016). The PSS indicated a significant decrease in stress from initial consultation to approximately 4–6 weeks post advice from 31.4 to 10.3 (p < 0.001) and the WEMWBS indicated a significant increase in client well-being from a mean of 26.9 to 46.5 (p < 0.001). Nine refined programme theories are presented which combine the qualitative and quantitative analysis; they are underpinned by three abstract theories: Capabilities model, The Decision to Trust Model, and Third Space. An explanatory framework is presented covering the micro, meso, and macro levels of CA. Use of a stress and well-being lens has allowed insight into the precursors of health in those receiving intensive advice. Using these measures whilst explaining contextual and mechanistic properties, begins to build a complex and real picture of how advice services impact on health. © 2018 John Wiley & Sons Ltd
High-intensity drinking in adult Australian twins
- Dash, Genevieve, Davis, Christal, Martin, Nicholas, Statham, Dixie, Lynskey, Michael, Slutske, Wendy
- Authors: Dash, Genevieve , Davis, Christal , Martin, Nicholas , Statham, Dixie , Lynskey, Michael , Slutske, Wendy
- Date: 2020
- Type: Text , Journal article
- Relation: Alcoholism: clinical and experimental research Vol. 44, no. 2 (2020), p. 522-531
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- Description: Background: Many adult drinkers consume far beyond the binge threshold. This “high-intensity drinking” (HID), defined as 2 (HID-2) and 3 (HID-3) times the binge threshold, is of public health interest due to its role in acute alcohol-related harms. Research on HID has mostly been limited to college-aged young adults, focused on contextual factors, and neglected the potential role of genetic influences on the propensity to engage in HID. Methods: Structured diagnostic interviews assessing past-year alcohol involvement were conducted with 3,785 individuals (1,365 men, 2,420 women; Mage = 32, range = 21 to 46), including 3,314 twins and 471 nontwin siblings from the Australian Twin Registry. Multinomial logistic regression analyses were conducted to compare HID-2 and HID-3 to binge drinking on demographic correlates, drinking characteristics, and drinking-related consequences. Biometric modeling was conducted to estimate the role of genetic, common, and individual-specific environmental factors in HID propensity. Results: Among past-year drinkers, the prevalence of HID-2 and HID-3 was both 22%, with men disproportionally represented. The frequencies of drinking, intoxication, and binge drinking significantly increased across the heavier drinking categories, which also evidenced higher average consumption quantities and higher rates of alcohol-related consequences. The propensity to engage in HID was significantly heritable (A = 37% [95% CI: 28 to 46%]), with individual-specific environmental influences accounting for the remainder of the variance. Conclusions: This study convincingly demonstrates that HID is not restricted to college-aged young adults, but also can be highly prevalent among those of working age, and that the propensity to engage in HID is partially explained by genetic influences. © 2020 by the Research Society on Alcoholism
- Authors: Dash, Genevieve , Davis, Christal , Martin, Nicholas , Statham, Dixie , Lynskey, Michael , Slutske, Wendy
- Date: 2020
- Type: Text , Journal article
- Relation: Alcoholism: clinical and experimental research Vol. 44, no. 2 (2020), p. 522-531
- Full Text:
- Reviewed:
- Description: Background: Many adult drinkers consume far beyond the binge threshold. This “high-intensity drinking” (HID), defined as 2 (HID-2) and 3 (HID-3) times the binge threshold, is of public health interest due to its role in acute alcohol-related harms. Research on HID has mostly been limited to college-aged young adults, focused on contextual factors, and neglected the potential role of genetic influences on the propensity to engage in HID. Methods: Structured diagnostic interviews assessing past-year alcohol involvement were conducted with 3,785 individuals (1,365 men, 2,420 women; Mage = 32, range = 21 to 46), including 3,314 twins and 471 nontwin siblings from the Australian Twin Registry. Multinomial logistic regression analyses were conducted to compare HID-2 and HID-3 to binge drinking on demographic correlates, drinking characteristics, and drinking-related consequences. Biometric modeling was conducted to estimate the role of genetic, common, and individual-specific environmental factors in HID propensity. Results: Among past-year drinkers, the prevalence of HID-2 and HID-3 was both 22%, with men disproportionally represented. The frequencies of drinking, intoxication, and binge drinking significantly increased across the heavier drinking categories, which also evidenced higher average consumption quantities and higher rates of alcohol-related consequences. The propensity to engage in HID was significantly heritable (A = 37% [95% CI: 28 to 46%]), with individual-specific environmental influences accounting for the remainder of the variance. Conclusions: This study convincingly demonstrates that HID is not restricted to college-aged young adults, but also can be highly prevalent among those of working age, and that the propensity to engage in HID is partially explained by genetic influences. © 2020 by the Research Society on Alcoholism
Decade of Medicare : The contribution of private practice dietitians to chronic disease management and diabetes group services
- Authors: Cant, Robyn , Ball, Lauren
- Date: 2015
- Type: Text , Journal article
- Relation: Nutrition and Dietetics Vol. 72, no. 3 (2015), p. 284-290
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- Description: Aim: To review changes in utilisation of dietetics services through the Medicare Chronic Disease Management program over the last decade and describe patient uptake in 2013. Methods: Dietetics service data were extracted from published Medicare statistics for the periods (i) January 2004 to December 2013 and (ii) January to December 2013. Data comprised individual dietetics services by state and patient demography, and group services data for provider professions regarding type 2 diabetes: dietitians, diabetes educators and exercise physiologists. t-test was used to investigate the association of dietetics' individual service utilisation and workforce statistics. Results: Individual dietetics Chronic Disease Management consultations in private practice have increased annually since 2004. Dietetics has remained the third largest provider. In 2013, a total of 302910 individual consultations were conducted; 7% of allied health consultations. Likewise, individual services for Indigenous Australians increased since 2008. Utilisation of group services for type 2 diabetes comprised <2% of dietetics services. Dietitians provided more group services than diabetes educators but considerably fewer than exercise physiologists. Middle-aged and older patients were common, with highest uptake by those aged 55-74 years. Overall, total and per capita utilisation rates were considerably higher in NSW, Victoria and Queensland compared to less populous states, although this disparity has reduced since 2010. Conclusions: As 10 years has elapsed since the program's inception, further evaluation of the policy is needed to examine large variations in dietetics' Chronic Disease Management uptake by state and territory in both individual and group services. © 2015 Dietitians Association of Australia.
- Authors: Cant, Robyn , Ball, Lauren
- Date: 2015
- Type: Text , Journal article
- Relation: Nutrition and Dietetics Vol. 72, no. 3 (2015), p. 284-290
- Full Text:
- Reviewed:
- Description: Aim: To review changes in utilisation of dietetics services through the Medicare Chronic Disease Management program over the last decade and describe patient uptake in 2013. Methods: Dietetics service data were extracted from published Medicare statistics for the periods (i) January 2004 to December 2013 and (ii) January to December 2013. Data comprised individual dietetics services by state and patient demography, and group services data for provider professions regarding type 2 diabetes: dietitians, diabetes educators and exercise physiologists. t-test was used to investigate the association of dietetics' individual service utilisation and workforce statistics. Results: Individual dietetics Chronic Disease Management consultations in private practice have increased annually since 2004. Dietetics has remained the third largest provider. In 2013, a total of 302910 individual consultations were conducted; 7% of allied health consultations. Likewise, individual services for Indigenous Australians increased since 2008. Utilisation of group services for type 2 diabetes comprised <2% of dietetics services. Dietitians provided more group services than diabetes educators but considerably fewer than exercise physiologists. Middle-aged and older patients were common, with highest uptake by those aged 55-74 years. Overall, total and per capita utilisation rates were considerably higher in NSW, Victoria and Queensland compared to less populous states, although this disparity has reduced since 2010. Conclusions: As 10 years has elapsed since the program's inception, further evaluation of the policy is needed to examine large variations in dietetics' Chronic Disease Management uptake by state and territory in both individual and group services. © 2015 Dietitians Association of Australia.
The use and utility of surrogates in biodiversity monitoring programmes
- Sato, Chloe, Westgate, Martin, Barton, Philip, Foster, Claire, O'Loughlin, Luke
- Authors: Sato, Chloe , Westgate, Martin , Barton, Philip , Foster, Claire , O'Loughlin, Luke
- Date: 2019
- Type: Text , Journal article
- Relation: Journal of Applied Ecology Vol. 56, no. 6 (2019), p. 1304-1310
- Full Text:
- Reviewed:
- Description: **Please note that there are multiple authors for this article therefore only the name of the first 5 including Federation University Australia affiliate “Philip Barton” is provided in this record**
- Authors: Sato, Chloe , Westgate, Martin , Barton, Philip , Foster, Claire , O'Loughlin, Luke
- Date: 2019
- Type: Text , Journal article
- Relation: Journal of Applied Ecology Vol. 56, no. 6 (2019), p. 1304-1310
- Full Text:
- Reviewed:
- Description: **Please note that there are multiple authors for this article therefore only the name of the first 5 including Federation University Australia affiliate “Philip Barton” is provided in this record**
A long-term habitat fragmentation experiment leads to morphological change in a species of carabid beetle
- Evans, Maldwyn, Banks, Sam, Barton, Philip, Davies, Kendi, Driscoll, Don
- Authors: Evans, Maldwyn , Banks, Sam , Barton, Philip , Davies, Kendi , Driscoll, Don
- Date: 2018
- Type: Text , Journal article
- Relation: Ecological Entomology Vol. 43, no. 3 (2018), p. 282-293
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- Description: 1. Habitat fragmentation and transformation are key drivers of species declines in landscapes. Most of the current understanding of species' responses to environmental change originates from studies of populations and communities. However, phenotypic variation offers another key aspect of species responses and could provide additional insights into the functional drivers of population change. 2. The goal of this study was to address this gap by exploring the morphological changes of a species of carabid beetle (Notonomus resplendens) with a known population response to the Wog Wog Habitat Fragmentation Experiment in Australia. We measured morphological traits associated with body size, head width, and dispersal ability. We quantified patterns of morphological variation over time and between native Eucalyptus forest fragments and the surrounding pine plantation matrix and the continuous intact native Eucalyptus forest controls. 3. We found sexually dimorphic morphological changes in response to the experimental treatments. Males increased in size, had larger legs and had smaller interocular widths in the matrix in both the short and long terms. Conversely, females became comparatively smaller and had increased interocular widths in the same treatments. Effects in the fragments were similar to those in the matrix, but exhibited more uncertainty. 4. Our results demonstrate that species can show morphological change in response to environmental change over very short time periods. We demonstrate that using both population and morphological data allows stronger inferences about the mechanisms behind species responses to environmental change. © 2017 The Royal Entomological Society
- Authors: Evans, Maldwyn , Banks, Sam , Barton, Philip , Davies, Kendi , Driscoll, Don
- Date: 2018
- Type: Text , Journal article
- Relation: Ecological Entomology Vol. 43, no. 3 (2018), p. 282-293
- Full Text:
- Reviewed:
- Description: 1. Habitat fragmentation and transformation are key drivers of species declines in landscapes. Most of the current understanding of species' responses to environmental change originates from studies of populations and communities. However, phenotypic variation offers another key aspect of species responses and could provide additional insights into the functional drivers of population change. 2. The goal of this study was to address this gap by exploring the morphological changes of a species of carabid beetle (Notonomus resplendens) with a known population response to the Wog Wog Habitat Fragmentation Experiment in Australia. We measured morphological traits associated with body size, head width, and dispersal ability. We quantified patterns of morphological variation over time and between native Eucalyptus forest fragments and the surrounding pine plantation matrix and the continuous intact native Eucalyptus forest controls. 3. We found sexually dimorphic morphological changes in response to the experimental treatments. Males increased in size, had larger legs and had smaller interocular widths in the matrix in both the short and long terms. Conversely, females became comparatively smaller and had increased interocular widths in the same treatments. Effects in the fragments were similar to those in the matrix, but exhibited more uncertainty. 4. Our results demonstrate that species can show morphological change in response to environmental change over very short time periods. We demonstrate that using both population and morphological data allows stronger inferences about the mechanisms behind species responses to environmental change. © 2017 The Royal Entomological Society
Species co-occurrence networks show reptile community reorganization under agricultural transformation
- Kay, Geoffrey, Tulloch, Ayesha, Barton, Philip, Cunningham, Saul, Driscoll, Don, Lindenmayer, David
- Authors: Kay, Geoffrey , Tulloch, Ayesha , Barton, Philip , Cunningham, Saul , Driscoll, Don , Lindenmayer, David
- Date: 2018
- Type: Text , Journal article
- Relation: Ecography Vol. 41, no. 1 (2018), p. 113-125
- Full Text:
- Reviewed:
- Description: Agricultural transformation represents one of the greatest threats to biodiversity, causing degradation and loss of habitat, leading to changes in the richness and composition of communities. These changes in richness and composition may, in turn, lead to altered species co-occurrence, but our knowledge of this remains limited. We used a novel co-occurrence network approach to examine the impact of agricultural transformation on reptile community structure within two large (> 172 000 km2; 224 sites) agricultural regions in southeastern Australia. We contrasted assemblages from sites surrounded by intact and modified landscapes and tested four key hypotheses that agricultural transformation leads to (H1) declines in species richness, (H2) altered assemblages, (H3) declines in overall co-occurrence, and (H4) complex restructuring of pairwise associations. We found that modified landscapes differed in composition but not richness compared with intact sites. Modified landscapes were also characterized by differences in co-occurrence network structure; with species sharing fewer sites with each other (reduced co-occurrence connectance), fewer highly-connected species (truncation of the frequency distribution of co-occurrence degree) and increased modularity of co-occurrence networks. Critically, overall loss of co-occurrence was underpinned by complex changes to the number and distribution of pair-wise co-occurrence links, with 41–44% of species also gaining associations with other species. Change in co-occurrence was not correlated with changes in occupancy, nor by functional trait membership, allowing a novel classification of species susceptibility to agricultural transformation. Our study reveals the value of using co-occurrence analysis to uncover impacts of agricultural transformation that may be masked in conventional studies of species richness and community composition. © 2017 The Authors
- Authors: Kay, Geoffrey , Tulloch, Ayesha , Barton, Philip , Cunningham, Saul , Driscoll, Don , Lindenmayer, David
- Date: 2018
- Type: Text , Journal article
- Relation: Ecography Vol. 41, no. 1 (2018), p. 113-125
- Full Text:
- Reviewed:
- Description: Agricultural transformation represents one of the greatest threats to biodiversity, causing degradation and loss of habitat, leading to changes in the richness and composition of communities. These changes in richness and composition may, in turn, lead to altered species co-occurrence, but our knowledge of this remains limited. We used a novel co-occurrence network approach to examine the impact of agricultural transformation on reptile community structure within two large (> 172 000 km2; 224 sites) agricultural regions in southeastern Australia. We contrasted assemblages from sites surrounded by intact and modified landscapes and tested four key hypotheses that agricultural transformation leads to (H1) declines in species richness, (H2) altered assemblages, (H3) declines in overall co-occurrence, and (H4) complex restructuring of pairwise associations. We found that modified landscapes differed in composition but not richness compared with intact sites. Modified landscapes were also characterized by differences in co-occurrence network structure; with species sharing fewer sites with each other (reduced co-occurrence connectance), fewer highly-connected species (truncation of the frequency distribution of co-occurrence degree) and increased modularity of co-occurrence networks. Critically, overall loss of co-occurrence was underpinned by complex changes to the number and distribution of pair-wise co-occurrence links, with 41–44% of species also gaining associations with other species. Change in co-occurrence was not correlated with changes in occupancy, nor by functional trait membership, allowing a novel classification of species susceptibility to agricultural transformation. Our study reveals the value of using co-occurrence analysis to uncover impacts of agricultural transformation that may be masked in conventional studies of species richness and community composition. © 2017 The Authors
Increased susceptibility to Haemonchus contortus infection by interleukin-5 modulation of eosinophil responses in sheep
- Hernández, Julia, Meeusen, Els, Rodríguez, Francisco, Piedrafita, David, González, Jorge
- Authors: Hernández, Julia , Meeusen, Els , Rodríguez, Francisco , Piedrafita, David , González, Jorge
- Date: 2020
- Type: Text , Journal article
- Relation: Parasite Immunology Vol. 42, no. 1 (2020), p.
- Full Text:
- Reviewed:
- Description: Eosinophils are prominent effector cells in immune responses against gastrointestinal nematode infections in ruminants, but their in vivo role has been hard to establish in large animals. Interleukin-5 is a key cytokine in the induction and stimulation of anti-parasitic eosinophil responses. This study attempted to modulate the eosinophil response in sheep through vaccination with recombinant interleukin-5 (rIL-5) and determine the effect on subsequent Haemonchus contortus infection. Nematode-resistant Canaria Hair Breed (CHB) sheep vaccinated with rIL-5 in Quil-A adjuvant, had lower blood eosinophil counts and higher mean worm burdens than control sheep vaccinated with Quil-A adjuvant alone. In addition, adult worms in IL-5-vaccinated sheep were significantly longer with higher eggs in utero in female worms, supporting an active role of eosinophils against adult parasites in CHB sheep. These results confirm that eosinophils can play a direct role in effective control of H contortus infection in sheep and offer a new approach to study immune responses in ruminants. © 2019 John Wiley & Sons Ltd
- Authors: Hernández, Julia , Meeusen, Els , Rodríguez, Francisco , Piedrafita, David , González, Jorge
- Date: 2020
- Type: Text , Journal article
- Relation: Parasite Immunology Vol. 42, no. 1 (2020), p.
- Full Text:
- Reviewed:
- Description: Eosinophils are prominent effector cells in immune responses against gastrointestinal nematode infections in ruminants, but their in vivo role has been hard to establish in large animals. Interleukin-5 is a key cytokine in the induction and stimulation of anti-parasitic eosinophil responses. This study attempted to modulate the eosinophil response in sheep through vaccination with recombinant interleukin-5 (rIL-5) and determine the effect on subsequent Haemonchus contortus infection. Nematode-resistant Canaria Hair Breed (CHB) sheep vaccinated with rIL-5 in Quil-A adjuvant, had lower blood eosinophil counts and higher mean worm burdens than control sheep vaccinated with Quil-A adjuvant alone. In addition, adult worms in IL-5-vaccinated sheep were significantly longer with higher eggs in utero in female worms, supporting an active role of eosinophils against adult parasites in CHB sheep. These results confirm that eosinophils can play a direct role in effective control of H contortus infection in sheep and offer a new approach to study immune responses in ruminants. © 2019 John Wiley & Sons Ltd
Integrating theory into disturbance interaction experiments to better inform ecosystem management
- Foster, Claire, Sato, Chloe, Lindenmayer, David, Barton, Philip
- Authors: Foster, Claire , Sato, Chloe , Lindenmayer, David , Barton, Philip
- Date: 2016
- Type: Text , Journal article
- Relation: Global Change Biology Vol. 22, no. 4 (2016), p. 1325-1335
- Full Text:
- Reviewed:
- Description: Managing multiple, interacting disturbances is a key challenge to biodiversity conservation, and one that will only increase as global change drivers continue to alter disturbance regimes. Theoretical studies have highlighted the importance of a mechanistic understanding of stressor interactions for improving the prediction and management of interactive effects. However, many conservation studies are not designed or interpreted in the context of theory and instead focus on case-specific management questions. This is a problem as it means that few studies test the relationships highlighted in theoretical models as being important for ecological management. We explore the extent of this problem among studies of interacting disturbances by reviewing recent experimental studies of the interaction between fire and grazing in terrestrial ecosystems. Interactions between fire and grazing can occur via a number of pathways; one disturbance can modify the other's likelihood, intensity or spatial distribution, or one disturbance can alter the other's impacts on individual organisms. The strength of such interactions will vary depending on disturbance attributes (e.g. size or intensity), and this variation is likely to be nonlinear. We show that few experiments testing fire-grazing interactions are able to identify the mechanistic pathway driving an observed interaction, and most are unable to detect nonlinear effects. We demonstrate how these limitations compromise the ability of experimental studies to effectively inform ecological management. We propose a series of adjustments to the design of disturbance interaction experiments that would enable tests of key theoretical pathways and provide the deeper ecological understanding necessary for effective management. Such considerations are relevant to studies of a broad range of ecological interactions and are critical to informing the management of disturbance regimes in the context of accelerating global change. © 2016 John Wiley & Sons Ltd.
- Authors: Foster, Claire , Sato, Chloe , Lindenmayer, David , Barton, Philip
- Date: 2016
- Type: Text , Journal article
- Relation: Global Change Biology Vol. 22, no. 4 (2016), p. 1325-1335
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- Description: Managing multiple, interacting disturbances is a key challenge to biodiversity conservation, and one that will only increase as global change drivers continue to alter disturbance regimes. Theoretical studies have highlighted the importance of a mechanistic understanding of stressor interactions for improving the prediction and management of interactive effects. However, many conservation studies are not designed or interpreted in the context of theory and instead focus on case-specific management questions. This is a problem as it means that few studies test the relationships highlighted in theoretical models as being important for ecological management. We explore the extent of this problem among studies of interacting disturbances by reviewing recent experimental studies of the interaction between fire and grazing in terrestrial ecosystems. Interactions between fire and grazing can occur via a number of pathways; one disturbance can modify the other's likelihood, intensity or spatial distribution, or one disturbance can alter the other's impacts on individual organisms. The strength of such interactions will vary depending on disturbance attributes (e.g. size or intensity), and this variation is likely to be nonlinear. We show that few experiments testing fire-grazing interactions are able to identify the mechanistic pathway driving an observed interaction, and most are unable to detect nonlinear effects. We demonstrate how these limitations compromise the ability of experimental studies to effectively inform ecological management. We propose a series of adjustments to the design of disturbance interaction experiments that would enable tests of key theoretical pathways and provide the deeper ecological understanding necessary for effective management. Such considerations are relevant to studies of a broad range of ecological interactions and are critical to informing the management of disturbance regimes in the context of accelerating global change. © 2016 John Wiley & Sons Ltd.