Climate warming shifts riverine macroinvertebrate communities to be more sensitive to chemical pollutants

Freshwaters are highly threatened ecosystems that are vulnerable to chemical pollution and climate change. Freshwater taxa vary in their sensitivity to chemicals and changes in species composition can potentially affect the sensitivity of assemblages to chemical exposure. Here we explore the potential consequences of future climate change on the composition and sensitivity of freshwater macroinvertebrate assemblages to chemical stressors using the UK as a case study. Macroinvertebrate assemblages under end of century (2080–2100) and baseline (1980–2000) climate conditions were predicted for 608 UK sites for four climate scenarios corresponding to mean temperature changes of 1.28 to 3.78°C. Freshwater macroinvertebrate toxicity data were collated for 19 chemicals and the hierarchical species sensitivity distribution model was used to predict the sensitivity of untested taxa using relatedness within a Bayesian approach. All four future climate scenarios shifted assemblage compositions, increasing the prevalence of Mollusca, Crustacea and Oligochaeta species, and the insect taxa of Odonata, Chironomidae, and Baetidae species. Contrastingly, decreases were projected for Plecoptera, Ephemeroptera (except for Baetidae) and Coleoptera species. Shifts in taxonomic composition were associated with changes in the percentage of species at risk from chemical exposure. For the 3.78°C climate scenario, 76% of all assemblages became more sensitive to chemicals and for 18 of the 19 chemicals, the percentage of species at risk increased. Climate warming‐induced increases in sensitivity were greatest for assemblages exposed to metals and were dependent on baseline assemblage composition, which varied spatially. Climate warming is predicted to result in changes in the use, environmental exposure and toxicity of chemicals. Here we show that, even in the absence of these climate‐chemical interactions, shifts in species composition due to climate warming will increase chemical risk and that the impact of chemical pollution on freshwater macroinvertebrate biodiversity may double or quadruple by the end of the 21st century

Standardizing and Disseminating Knowledge: The Role of the OECD in Global Governance

If ‘knowledge is power’, it is unsurprising that the production, legitimation, and application of social scientific knowledge, not least that which was designed to harness social organization to economic growth, is a potentially contentious process. Coping with, adapting to, or attempting to shape globalization has emerged as a central concern of policy-makers who are, therefore, interested in knowledge to assist their managerial activities. Thus, an organization that can create, synthesize, legitimate, and dissemination useful knowledge can play a significant role in the emerging global governance system. The OECD operates as one important site for the construction, standardization, and dissemination of transnational policy ideas. OECD staff conducts research and produces a range of background studies and reports, drawing on disciplinary knowledge (typically economics) supplemented by their ‘organizational discourses’. This paper probes the contested nature of knowledge production and attempts to evaluate the impact of the OECD’s efforts to produce globally applicable policy advice. Particular attention is paid to important initiatives in the labour market and social policy fields—the Jobs Study and Babies and Bosses

The Rural Clinical School of Western Australia Mindfulness Project

Background: Medical students experience high levels of stress during their training. Literature suggests that mindfulness can reduce stress and increase self-compassion levels in medical students. Most mindfulness training programs are delivered face-to-face and require significant time commitments, which can be difficult to achieve for rurally-based students with heavy academic workloads.Aim: We sought to determine the feasibility and effectiveness of a mindfulness training program delivered online to medical students at a Rural Clinical School.Methods: An 8-week online training program was delivered to third year medical students at the Rural Clinical School of Western Australia in 2016.Using quantitative-qualitative mixed-methods approach, we measured the frequency and duration of the participants’ mindfulness meditation practice, and assessed changes in their perceived stress, self-compassion and compassion levels, as well as personal and professional attitudes and behaviours.Results: 47 students were recruited to the study. 50% of participants were practising at least weekly by the end of the 8-week program, and 32% of responding students reported practising at least weekly 6 months following the intervention. There was a statistically significant reduction in participants’ perceived stress levels and a significant increase in self-compassion at 6 month follow up. Participants reported qualitative insights about the personal and professional impact of mindfulness meditation training as well as barriers to practice

Refining the genomic location of single nucleotide polymorphism variation affecting Atlantic salmon maturation timing at a key large-effect locus

Efforts to understand the genetic underpinnings of phenotypic variation are becoming more and more frequent in molecular ecology. Such efforts often lead to the identification of candidate regions showing signals of association and/or selection. These regions may contain multiple genes and therefore validation of which genes are actually responsible for the signal is required. In Atlantic salmon (Salmo salar), a large-effect locus for maturation timing, an ecologically important trait, occurs in a genomic region including two genes, vgll3 and akap11, but data for clearly determining which of the genes (or both) contribute to the association have been lacking. Here, we take advantage of natural recombination events detected between the two candidate genes in a salmon broodstock to reduce linkage disequilibrium at the locus, thus enabling delineation of the influence of variation at these two genes on early maturation. By rearing 5,895 males to maturation age, of which 81% had recombinant vgll3/akap11 allelic combinations, we found that vgll3 single nucleotide polymorphism (SNP) variation was strongly associated with early maturation, whereas there was little or no association between akap11 SNP variation and early maturation. These findings provide strong evidence supporting vgll3 as the primary candidate gene in the chromosome 25 locus for influencing early maturation. This will help guide future research for understanding the genetic processes controlling early maturation. This also exemplifies the utility of natural recombinants to more precisely map causal variation underlying ecologically important phenotypic diversity.Peer reviewe

Onset of meiosis in the chicken embryo; evidence of a role for retinoic acid

Background: Meiosis in higher vertebrates shows a dramatic sexual dimorphism: germ cells enter meiosis and arrest at prophase I during embryogenesis in females, whereas in males they enter mitotic arrest during embryogenesis and enter meiosis only after birth. Here we report the molecular analysis of meiosis onset in the chicken model and provide evidence for conserved regulation by retinoic acid

The Effects of a Plyometric Training Program on Jump Performance in Collegiate Figure Skaters: A Pilot Study

International Journal of Exercise Science 9(2): 175-186, 2016. Plyometric training has been implemented to increase jump height in a variety of sports, but its effects have not been researched in figure skating. The purpose of this study was to determine the effects of a plyometric training program on on-ice and off-ice jump performance. Six collegiate figure skaters (19.8±1.2 years; 164.7±4.9 cm; 60.3±11.6 kg) completed a six-week sport-specific plyometric training program, consisting of low to moderate intensity plyometric exercises, while eight collegiate figure skaters (21.1±3.9 years; 162.6±6.0 cm; 60.4±6.1 kg) served as the control group. Significant increases were found for vertical jump height, standing long jump distance, (F = 31.0, p \u3c 0.001), and flight time (F = 11.6, p = 0.007). No significant differences were found for self-reported jump evaluation (p = 0.101). Six weeks of plyometric training improved both on-ice and off-ice jump performance in collegiate figure skaters, while short-term skating training alone resulted in decreases. These results indicate that figure skaters could participate in off-ice plyometric training

Brief online mindfulness training for medical students: a randomized control study

BACKGROUNDMedical students experience high levels of stress during their training. Literature suggests that mindfulness can reduce stress and increase self-compassion levels in medical students. However, most mindfulness training programs are delivered face-to-face and require significant time commitments, which can be challenging for rurally-based students with heavy academic workloads and limited support networks. PURPOSETo evaluate the feasibility and efficacy of a brief online Mindfulness training program for medical students based in rural areas, with regards to reducing stress, increasing self-compassion, mindfulness and study engagement. METHODSThis is a non-registered randomised control trial. Participants included both urban and rural medical students from UWA, University of Notre Dame and the RCSWA from 2018-2020. Participants were randomised to the intervention group, an 8-week online mindfulness training program, or the control group. Using quantitative-qualitative mixed-methods approach, we measured the frequency, duration and quality of the participants mindfulness meditation practice, and assessed changes in their perceived stress, self-compassion, mindfulness and study engagement levels. Further, the intervention group recorded a weekly reflective journal documenting their experience of the program. RESULTS114 participants were recruited to the study. 61 were randomised to the intervention, and 53 to the control. Quantitative analysis of the frequency, duration and quality of mindfulness meditation practice and changes in stress, self-compassion, mindfulness and study engagement is currently being conducted. Preliminary qualitative results reveal that participants experienced increased self-awareness, more mindfulness of their day-to-day activities, improved emotional regulation and increased productivity, while also facing difficulties with making time for their mindfulness practice. CONCLUSIONWe anticipate that this study will demonstrate that an online mindfulness training program tailored to reach rurally located medical students is feasible and effective in modifying their stress levels and psychological wellbeing.

Climate warming shifts riverine macroinvertebrate communities to be more sensitive to chemical pollutants

Freshwaters are highly threatened ecosystems that are vulnerable to chemical pollution and climate change. Freshwater taxa vary in their sensitivity to chemicals and changes in species composition can potentially affect the sensitivity of assemblages to chemical exposure. Here we explore the potential consequences of future climate change on the composition and sensitivity of freshwater macroinvertebrate assemblages to chemical stressors using the UK as a case study. Macroinvertebrate assemblages under end of century (2080–2100) and baseline (1980–2000) climate conditions were predicted for 608 UK sites for four climate scenarios corresponding to mean temperature changes of 1.28 to 3.78°C. Freshwater macroinvertebrate toxicity data were collated for 19 chemicals and the hierarchical species sensitivity distribution model was used to predict the sensitivity of untested taxa using relatedness within a Bayesian approach. All four future climate scenarios shifted assemblage compositions, increasing the prevalence of Mollusca, Crustacea and Oligochaeta species, and the insect taxa of Odonata, Chironomidae, and Baetidae species. Contrastingly, decreases were projected for Plecoptera, Ephemeroptera (except for Baetidae) and Coleoptera species. Shifts in taxonomic composition were associated with changes in the percentage of species at risk from chemical exposure. For the 3.78°C climate scenario, 76% of all assemblages became more sensitive to chemicals and for 18 of the 19 chemicals, the percentage of species at risk increased. Climate warming-induced increases in sensitivity were greatest for assemblages exposed to metals and were dependent on baseline assemblage composition, which varied spatially. Climate warming is predicted to result in changes in the use, environmental exposure and toxicity of chemicals. Here we show that, even in the absence of these climate-chemical interactions, shifts in species composition due to climate warming will increase chemical risk and that the impact of chemical pollution on freshwater macroinvertebrate biodiversity may double or quadruple by the end of the 21st century