Ericoid mycorrhizal fungi mediate the response of ombrotrophic peatlands to fertilization: a modeling study.

Ericaceous shrubs adapt to the nutrient-poor conditions in ombrotrophic peatlands by forming symbiotic associations with ericoid mycorrhizal (ERM) fungi. Increased nutrient availability may diminish the role of ERM pathways in shrub nutrient uptake, consequently altering the biogeochemical cycling within bogs. To explore the significance of ERM fungi in ombrotrophic peatlands, we developed the model MWMmic (a peat cohort-based biogeochemical model) into MWMmic-NP by explicitly incorporating plant-soil nitrogen (N) and phosphorus (P) cycling and ERM fungi processes. The new model was applied to simulate the biogeochemical cycles in the Mer Bleue (MB) bog in Ontario, Canada, and their responses to fertilization. MWMmic_NP reproduced the carbon(C)-N-P cycles and vegetation dynamics observed in the MB bog, and their responses to fertilization. Our simulations showed that fertilization increased shrub biomass by reducing the C allocation to ERM fungi, subsequently suppressing the growth of underlying Sphagnum mosses, and decreasing the peatland C sequestration. Our species removal simulation further demonstrated that ERM fungi were key to maintaining the shrub-moss coexistence and C sink function of bogs. Our results suggest that ERM fungi play a significant role in the biogeochemical cycles in ombrotrophic peatlands and should be considered in future modeling efforts.

Promoting students' safety and wellbeing: ethical practice in schools.

Although 'child safety' is now a national policy priority in Australia, there is little research exploring the practices in schools that contribute to children and young people's felt sense of safety and wellbeing. Drawing on a mixed-method Australian Research Council (ARC) Discovery project, this article presents findings from interviews with school staff (N = 10), leaders (N = 5) and nine focus groups with students (N = 58), in primary and secondary schools in three Australian states (New South Wales, Victoria and South Australia). We employ relational ethics, recognition theory and the theory of practice architectures to explore practices at school that support student wellbeing and safety. The findings contribute significantly to understanding the 'bundled' nature of current practices and the conditions that enable and constrain these. Close attention to these findings is critical as schools seek to operationalise the National Child Safe Principles and refine ongoing safeguarding procedures. The findings have informed the development of an online survey that is currently testing, on a much larger scale, which elements of ethical practice are most positively associated with students' safety, wellbeing and recognition at school.

Young People's Perceptions of Sexual Assault in Residential Care: "It Does Happen a Lot".

The Australian Royal Commission into Institutional Responses to Child Sexual Abuse (the Royal Commission) examined child sexual abuse within a wide range of institutions that provide services to children, this included residential facilities. The current study (funded by the Royal Commission) considers young people's perception of safety in residential care; specifically, the current study attended to the voices of young people who spoke about sexual harassment and assault in qualitative interviews. Interviews were conducted with young people aged between 13 and 21 years who were or had recently been in residential care. Participants were asked for their perceptions of situations in a series of vignettes describing various levels and types of sexual assault and harassment. During these interviews, the young people in this study voluntarily reported known incidences of sexual assault and harassment in varying levels, perpetrated by workers, individuals outside of residential care, and peers within residential care. Sexual assault and harassment was discussed in heteronormative and gendered ways with young men seen as perpetrators and protectors, and young women seen as being vulnerable. Further, it was evident from this study, that there were varying responses to these situations from workers within the residential care facilities.

Peatland Microbial Community Composition Is Driven by a Natural Climate Gradient.

Peatlands are important players in climate change-biosphere feedbacks via long-term net carbon (C) accumulation in soil organic matter and as potential net C sources including the potent greenhouse gas methane (CH4). Interactions of climate, site-hydrology, plant community, and groundwater chemical factors influence peatland development and functioning, including C dioxide (CO2) and CH4 fluxes, but the role of microbial community composition is not well understood. To assess microbial functional and taxonomic dissimilarities, we used high throughput sequencing of the small subunit ribosomal DNA (SSU rDNA) to determine bacterial and archaeal community composition in soils from twenty North American peatlands. Targeted DNA metabarcoding showed that although Proteobacteria, Acidobacteria, and Actinobacteria were the dominant phyla on average, intermediate and rich fens hosted greater diversity and taxonomic richness, as well as an array of candidate phyla when compared with acidic and nutrient-poor poor fens and bogs. Moreover, pH was revealed to be the strongest predictor of microbial community structure across sites. Predictive metagenome content (PICRUSt) showed increases in specific genes, such as purine/pyrimidine and amino-acid metabolism in mid-latitude peatlands from 38 to 45° N, suggesting a shift toward utilization of microbial biomass over utilization of initial plant biomass in these microbial communities. Overall, there appears to be noticeable differences in community structure between peatland classes, as well as differences in microbial metabolic activity between latitudes. These findings are in line with a predicted increase in the decomposition and accelerated C turnover, and suggest that peatlands north of 37° latitude may be particularly vulnerable to climate change.

A service evaluation of specialist nurse telephone follow-up of bowel cancer patients after surgery.

INTRODUCTION: the NHS Long Term Plan has called for a reduction in the number of outpatient appointments to reduce pressure on hospital services and increase ease of access for patients. This article presents a service evaluation of an innovative, nurse-led telephone follow-up service for a group of elective bowel cancer patients following surgery. METHODS: the records of patients who underwent surgery over a 2-year period were accessed to determine the number of telephone follow-ups and other investigations. This was used to model the potential cost saving for commissioners against traditional clinic follow-up. Patient satisfaction was assessed by the European Organisation for Research and Treatment of Cancer questionnaire on Outpatient Satisfaction in 30 patients. RESULTS: feedback on the service was overwhelmingly positive, with patients praising the care received from the specialist nurses, but also commenting on increased continuity of care, ease of access and convenience. The service also potentially creates significant savings for commissioners as the agreed tariff for nurse telephone follow-up is significantly less than the outpatient tariff. DISCUSSION: this innovative follow-up system is well liked by patients and should provide savings for commissioners. The hospital also benefits from an increase in capacity to see new or more unwell patients, and a reduction in carbon emissions. Such a service, however, is dependent on people, and although it has functioned effectively in this department for approximately 20 years, it would only be generalisable to other units if staff had appropriate expertise.

A service evaluation of specialist nurse telephone follow-up of bowel cancer patients after surgery.

INTRODUCTION: the NHS Long Term Plan has called for a reduction in the number of outpatient appointments to reduce pressure on hospital services and increase ease of access for patients. This article presents a service evaluation of an innovative, nurse-led telephone follow-up service for a group of elective bowel cancer patients following surgery. METHODS: the records of patients who underwent surgery over a 2-year period were accessed to determine the number of telephone follow-ups and other investigations. This was used to model the potential cost saving for commissioners against traditional clinic follow-up. Patient satisfaction was assessed by the European Organisation for Research and Treatment of Cancer questionnaire on Outpatient Satisfaction in 30 patients. RESULTS: feedback on the service was overwhelmingly positive, with patients praising the care received from the specialist nurses, but also commenting on increased continuity of care, ease of access and convenience. The service also potentially creates significant savings for commissioners as the agreed tariff for nurse telephone follow-up is significantly less than the outpatient tariff. DISCUSSION: this innovative follow-up system is well liked by patients and should provide savings for commissioners. The hospital also benefits from an increase in capacity to see new or more unwell patients, and a reduction in carbon emissions. Such a service, however, is dependent on people, and although it has functioned effectively in this department for approximately 20 years, it would only be generalisable to other units if staff had appropriate expertise.

Distribution and diversity of Verrucomicrobia methanotrophs in geothermal and acidic environments.

Recently, methanotrophic members of the phylum Verrucomicrobia have been described, but little is known about their distribution in nature. We surveyed methanotrophic bacteria in geothermal springs and acidic wetlands via pyrosequencing of 16S rRNA gene amplicons. Putative methanotrophic Verrucomicrobia were found in samples covering a broad temperature range (22.5-81.6°C), but only in acidic conditions (pH 1.8-5.0) and only in geothermal environments, not in acidic bogs or fens. Phylogenetically, three 16S rRNA gene sequence clusters of putative methanotrophic Verrucomicrobia were observed. Those detected in high-temperature geothermal samples (44.1-81.6°C) grouped with known thermoacidiphilic 'Methylacidiphilum' isolates. A second group dominated in moderate-temperature geothermal samples (22.5-40.1°C) and a representative mesophilic methanotroph from this group was isolated (strain LP2A). Genome sequencing verified that strain LP2A possessed particulate methane monooxygenase, but its 16S rRNA gene sequence identity to 'Methylacidiphilum infernorum' strain V4 was only 90.6%. A third group clustered distantly with known methanotrophic Verrucomicrobia. Using pmoA-gene targeted quantitative polymerase chain reaction, two geothermal soil profiles showed a dominance of LP2A-like pmoA sequences in the cooler surface layers and 'Methylacidiphilum'-like pmoA sequences in deeper, hotter layers. Based on these results, there appears to be a thermophilic group and a mesophilic group of methanotrophic Verrucomicrobia. However, both were detected only in acidic geothermal environments.

A synthesis of methane emissions from 71 northern, temperate, and subtropical wetlands.

Wetlands are the largest natural source of atmospheric methane. Here, we assess controls on methane flux using a database of approximately 19 000 instantaneous measurements from 71 wetland sites located across subtropical, temperate, and northern high latitude regions. Our analyses confirm general controls on wetland methane emissions from soil temperature, water table, and vegetation, but also show that these relationships are modified depending on wetland type (bog, fen, or swamp), region (subarctic to temperate), and disturbance. Fen methane flux was more sensitive to vegetation and less sensitive to temperature than bog or swamp fluxes. The optimal water table for methane flux was consistently below the peat surface in bogs, close to the peat surface in poor fens, and above the peat surface in rich fens. However, the largest flux in bogs occurred when dry 30-day averaged antecedent conditions were followed by wet conditions, while in fens and swamps, the largest flux occurred when both 30-day averaged antecedent and current conditions were wet. Drained wetlands exhibited distinct characteristics, e.g. the absence of large flux following wet and warm conditions, suggesting that the same functional relationships between methane flux and environmental conditions cannot be used across pristine and disturbed wetlands. Together, our results suggest that water table and temperature are dominant controls on methane flux in pristine bogs and swamps, while other processes, such as vascular transport in pristine fens, have the potential to partially override the effect of these controls in other wetland types. Because wetland types vary in methane emissions and have distinct controls, these ecosystems need to be considered separately to yield reliable estimates of global wetland methane release.

Nutrient resorption of two evergreen shrubs in response to long­term fertilization in a bog.

Plant resorption of multiple nutrients during leaf senescence has been established but stoichiometric changes among N, P and K during resorption and after fertilization are poorly understood. We anticipated that increased N supply would lead to further P limitation or co-limitation with N or K [i.e. P-(co)limitation], decrease N resorption and increase P and K resorption, while P and K addition would decrease P and K resorption and increase N resorption. Furthermore, Ca would accumulate while Mg would be resorbed during leaf senescence, irrespective of fertilization. We investigated the effect of N, P and K addition on resorption in two evergreen shrubs (Chamaedaphne calyculata and Rhododendron groenlandicum) in a long-term fertilization experiment at Mer Bleue bog, Ontario, Canada. In general, N addition caused further P-(co)limitation, increased P and K resorption efficiency but did not affect N resorption. P and K addition did not shift the system to N limitation and affect K resorption, but reduced P resorption proficiency. C. calyculata resorbed both Ca and Mg while R. groenlandicum resorbed neither. C. calyculata showed a higher resorption than R. groenlandicum, suggesting it is better adapted to nutrient deficiency than R. groenlandicum. Resorption during leaf senescence decreased N:P, N:K and K:P ratios. The limited response of N and K and the response of P resorption to fertilization reflect the stoichiometric coupling of nutrient cycling, which varies among the two shrub species; changes in species composition may affect nutrient cycling in bogs.

Vegetation feedbacks of nutrient addition lead to a weaker carbon sink in an ombrotrophic bog.

To study vegetation feedbacks of nutrient addition on carbon sequestration capacity, we investigated vegetation and ecosystem CO2 exchange at Mer Bleue Bog, Canada in plots that had been fertilized with nitrogen (N) or with N plus phosphorus (P) and potassium (K) for 7-12 years. Gross photosynthesis, ecosystem respiration, and net CO2 exchange were measured weekly during May-September 2011 using climate-controlled chambers. A substrate-induced respiration technique was used to determine the functional ability of the microbial community. The highest N and NPK additions were associated with 40% less net CO2 uptake than the control. In the NPK additions, a diminished C sink potential was due to a 20-30% increase in ecosystem respiration, while gross photosynthesis rates did not change as greater vascular plant biomass compensated for the decrease in Sphagnum mosses. In the highest N-only treatment, small reductions in gross photosynthesis and no change in ecosystem respiration led to the reduced C sink. Substrate-induced microbial respiration was significantly higher in all levels of NPK additions compared with control. The temperature sensitivity of respiration in the plots was lower with increasing cumulative N load, suggesting more labile sources of respired CO2 . The weaker C sink potential could be explained by changes in nutrient availability, higher woody : foliar ratio, moss loss, and enhanced decomposition. Stronger responses to NPK fertilization than to N-only fertilization for both shrub biomass production and decomposition suggest that the bog ecosystem is N-P/K colimited rather than N-limited. Negative effects of further N-only deposition were indicated by delayed spring CO2 uptake. In contrast to forests, increased wood formation and surface litter accumulation in bogs seem to reduce the C sink potential owing to the loss of peat-forming Sphagnum.

Comparison of NO(x) fluxes measured by eddy covariance to emission inventories and land use.

Uncertainty in emission inventories remains a critical limitation of air quality modeling and management. Using eddy covariance, we measured surface-atmosphere exchange fluxes of nitrogen oxides (NO(x)) at the neighborhood scale at 13 sites in the Norfolk, Virginia area to estimate emissions, to evaluate official inventories, and to quantify relationships between emissions and land use. Average daytime fluxes ranged from 0.4 µg m(-2) s(-1) at a site near open water to 9.5 µg m(-2) s(-1) at a site dominated by vehicle traffic. NO(x) fluxes were correlated with both road density and medium- plus high-intensity development, confirming that both motor vehicles and sources associated with development are responsible for NO(x) emissions in urban areas. Spatially averaged NO(x) fluxes measured by eddy covariance agreed to within 3% with the National Emission Inventory (NEI) but were 2.8 times higher than those in the corresponding grid cell of an emission inventory developed for air quality modeling. These average fluxes were 4.6, 4.5, and 1.7 µg m(-2) s(-1), respectively. Uncertainty in the inventories appears to be dominated by the nonroad mobile source category. It is especially important to know NO(x) emissions accurately because in certain photochemical regimes, reducing NO(x) emissions can exacerbate secondary pollutant formation.

Prioritising Children and Young People with Disability in Research About Domestic and Family Violence: Methodological, Ethical and Pragmatic Reflections.

Purpose: The perspectives of children and young people with disability who experience domestic and family violence are under-researched, impeding the development of approaches that meet their needs. Knowledge gaps stem from the layered discursive positioning of disability, childhood/youth, or domestic and family violence in addition to the methodological, ethical and pragmatic complexity of research needed to understand their priorities and be attuned to their lived experience. This article explores methodological, ethical and practical challenges to centring their voices in research about domestic and family violence. Method: A conceptual framework of feminist disability theory and intersectionality informed our co-designed research, across three phases: (1) quantitative large-scale data linkage and case file analysis; (2) qualitative research with children and young people, their families and service providers and (3) stakeholder engagement workshops. Results: We reflect on how our research was able to prioritise the contextual agency of children and young people with disability, ways it could not, and other constraints. Conclusion: Children and young people with disability experiencing domestic and family violence hold an expert and unique vantage point on what happens to them. Amplifying their priorities for directing policy and organisational change requires more of researchers in terms of methods, but also more flexibility in how projects are funded to enable creativity and innovation. We call for collective attention to frameworks for supported decision-making and child ethics to progress inclusive research which recognises the importance of participation for children and young people with disability.

Delay modulates the immune response to nerve repair.

Effective regeneration after peripheral nerve injury requires macrophage recruitment. We investigated the activation of remodeling pathways within the macrophage population when repair is delayed and identified alteration of key upstream regulators of the inflammatory response. We then targeted one of these regulators, using exogenous IL10 to manipulate the response to injury at the repair site. We demonstrate that this approach alters macrophage polarization, promotes macrophage recruitment, axon extension, neuromuscular junction formation, and increases the number of regenerating motor units reaching their target. We also demonstrate that this approach can rescue the effects of delayed nerve graft.

GLORIA - A globally representative hyperspectral in situ dataset for optical sensing of water quality.

The development of algorithms for remote sensing of water quality (RSWQ) requires a large amount of in situ data to account for the bio-geo-optical diversity of inland and coastal waters. The GLObal Reflectance community dataset for Imaging and optical sensing of Aquatic environments (GLORIA) includes 7,572 curated hyperspectral remote sensing reflectance measurements at 1 nm intervals within the 350 to 900 nm wavelength range. In addition, at least one co-located water quality measurement of chlorophyll a, total suspended solids, absorption by dissolved substances, and Secchi depth, is provided. The data were contributed by researchers affiliated with 59 institutions worldwide and come from 450 different water bodies, making GLORIA the de-facto state of knowledge of in situ coastal and inland aquatic optical diversity. Each measurement is documented with comprehensive methodological details, allowing users to evaluate fitness-for-purpose, and providing a reference for practitioners planning similar measurements. We provide open and free access to this dataset with the goal of enabling scientific and technological advancement towards operational regional and global RSWQ monitoring.

Assessing the impact of harm reduction programs on law enforcement in Southeast Asia: a description of a regional research methodology.

For over 15 years the Australian Agency for International Development (AusAID) has been a leading donor for harm reduction projects in Southeast Asia. The recent AusAID-supported harm reduction projects of greatest significance have included the Asia Regional HIV/AIDS Project (AHRP), from 2002 until 2007,1 and the HIV/AIDS Asia Regional Program (HAARP), from 2007 until 2015.2 Both projects included in their design specific strategies for engaging with law enforcement agencies at country level. The main focus of these strategies has been to develop law enforcement harm reduction policy and curriculum, and the design and implementation of specific harm reduction training for law enforcement officers.In July 2008, the Australian Development Research Awards (ADRA) funded the Nossal Institute for Global Health at the University of Melbourne to establish a research project created to assess the influence of harm reduction programs on the policy and operational practices of law enforcement agencies in Southeast Asia, known as the LEHRN Project (Law Enforcement, Harm Reduction, Nossal Institute Project). The ADRA is a unique grant research mechanism that specifically funds development research to improve the understanding and informed decision making of the implementation of Australian aid effectiveness.While the need to engage law enforcement when establishing harm reduction programs was well documented, little was known about the impact or influence of harm reduction programs on policy and practices of law enforcement agencies. The LEHRN Project provided the opportunity to assess the impact of harm reduction programs on law enforcement in Southeast Asia, with a focus on Vietnam, Cambodia and Lao PDR.

How do Research Ethics Committee Members Respond to Hypothetical Studies with Children? Results from the MESSI Study.

Hypothetical scenarios were used to assess the influence of the sensitivity of the study topic, payments, and study methods on research ethics committee (HREC) members' approval of social research studies involving children. A total of 183 Australian HREC members completed an online survey. The higher the perceived sensitivity of the study topic, the less likely the study would be approved by an HREC member. HREC members were most likely to approve each of the hypothetical studies if no payment was offered. Payment was the most common reason for not approving the low risk studies, while risks were the most common reasons for not approving the more sensitive studies. Face-to-face interviews conducted at home with children elicited substantially higher rates of approval from HREC members with more sensitive study topics. Both HRECs and researchers may benefit from additional guidance on managing risks and payments for children and young people in research.

Young carers and educational engagement: Quantitative analysis of bursary applications in Australia.

Young carers support family members affected by disability or a health condition. The Young Carer Bursary Program aims to support young carers' education. This paper analysed data from consenting bursary applicants (2017-2019) to investigate relationships between wellbeing, educational attendance, home study and other factors. Descriptive statistics, correlation and regression analysis determined significant issues, relationships and influential factors related to young carer (N = 1,443) wellbeing and education. Sixty-eight percent were aged between 13 and 18 years and attended secondary school. One third of the sample reported that they were the main carer in their family and 29% reported receiving no support. Female applicants from single parent households who were the main carer attended educational settings less often. Eighteen percent (n = 267) rated their wellbeing as poor/very poor. Better wellbeing was associated with increased educational attendance (rs  = 0.33, p < 0.001) and home study (rs  = 0.34, p < 0.001). Wellbeing was associated with main carer status, caring for a parent, having a disability, being older and having few supports. Educational attendance was associated with main carer status, higher care load and fewer supports. Home study was associated with having a disability, caring for a sibling, caring for more than 11 hr per week and having fewer supports. Important factors about the age, life situation and challenges experienced by young carers identified in this paper indicate that further research into preferred supports and effectiveness of the bursary in improving educational engagement is warranted.

Human Research Ethics Committee Experiences and Views About Children's Participation in Research: Results From the MESSI Study.

As part of a larger study, Australian Human Research Ethics Committee (HREC) members and managers were surveyed about their decision-making and views about social research studies with child participants. Responses of 229 HREC members and 42 HREC managers are reported. While most HREC members had received ethical training, HREC training and guidelines specific to research involving children were rare. Most applications involving children had to go through a full ethical review, but few adverse events were reported to HRECs regarding the conduct of the studies. Revisions to study proposals requested by HRECs were mostly related to consent processes and age-appropriate language. One-third of HREC members said that they would approve research on any topic. Most were also concerned that the methodology was appropriate, and the risks and benefits were clearly articulated. Specific training and guidance are needed to increase HREC members' confidence to judge ethical research with children.

Variation in carbon and nitrogen concentrations among peatland categories at the global scale.

Peatlands account for 15 to 30% of the world's soil carbon (C) stock and are important controls over global nitrogen (N) cycles. However, C and N concentrations are known to vary among peatlands contributing to the uncertainty of global C inventories, but there are few global studies that relate peatland classification to peat chemistry. We analyzed 436 peat cores sampled in 24 countries across six continents and measured C, N, and organic matter (OM) content at three depths down to 70 cm. Sites were distinguished between northern (387) and tropical (49) peatlands and assigned to one of six distinct broadly recognized peatland categories that vary primarily along a pH gradient. Peat C and N concentrations, OM content, and C:N ratios differed significantly among peatland categories, but few differences in chemistry with depth were found within each category. Across all peatlands C and N concentrations in the 10-20 cm layer, were 440 ± 85.1 g kg-1 and 13.9 ± 7.4 g kg-1, with an average C:N ratio of 30.1 ± 20.8. Among peatland categories, median C concentrations were highest in bogs, poor fens and tropical swamps (446-532 g kg-1) and lowest in intermediate and extremely rich fens (375-414 g kg-1). The C:OM ratio in peat was similar across most peatland categories, except in deeper samples from ombrotrophic tropical peat swamps that were higher than other peatlands categories. Peat N concentrations and C:N ratios varied approximately two-fold among peatland categories and N concentrations tended to be higher (and C:N lower) in intermediate fens compared with other peatland types. This study reports on a unique data set and demonstrates that differences in peat C and OM concentrations among broadly classified peatland categories are predictable, which can aid future studies that use land cover assessments to refine global peatland C and N stocks.

Genome-wide association analyses of physical activity and sedentary behavior provide insights into underlying mechanisms and roles in disease prevention.

Although physical activity and sedentary behavior are moderately heritable, little is known about the mechanisms that influence these traits. Combining data for up to 703,901 individuals from 51 studies in a multi-ancestry meta-analysis of genome-wide association studies yields 99 loci that associate with self-reported moderate-to-vigorous intensity physical activity during leisure time (MVPA), leisure screen time (LST) and/or sedentary behavior at work. Loci associated with LST are enriched for genes whose expression in skeletal muscle is altered by resistance training. A missense variant in ACTN3 makes the alpha-actinin-3 filaments more flexible, resulting in lower maximal force in isolated type IIA muscle fibers, and possibly protection from exercise-induced muscle damage. Finally, Mendelian randomization analyses show that beneficial effects of lower LST and higher MVPA on several risk factors and diseases are mediated or confounded by body mass index (BMI). Our results provide insights into physical activity mechanisms and its role in disease prevention.