Curtin University

About: Curtin University is a education organization based out in Perth, Western Australia, Australia. It is known for research contribution in the topics: Population & Zircon. The organization has 14257 authors who have published 48997 publications receiving 1336531 citations. The organization is also known as: WAIT & Western Australian Institute of Technology.

Precipitation drives global variation in natural selection.

Abstract: Climate change has the potential to affect the ecology and evolution of every species on Earth. Although the ecological consequences of climate change are increasingly well documented, the effects of climate on the key evolutionary process driving adaptation—natural selection—are largely unknown. We report that aspects of precipitation and potential evapotranspiration, along with the North Atlantic Oscillation, predicted variation in selection across plant and animal populations throughout many terrestrial biomes, whereas temperature explained little variation. By showing that selection was influenced by climate variation, our results indicate that climate change may cause widespread alterations in selection regimes, potentially shifting evolutionary trajectories at a global scale.

The contribution of environmental exposure to the etiology of autism spectrum disorder.

Abstract: Autism spectrum disorder (ASD) is a neurodevelopmental condition of heterogeneous etiology. While it is widely recognized that genetic and environmental factors and their interactions contribute to autism phenotypes, their precise causal mechanisms remain poorly understood. This article reviews our current understanding of environmental risk factors of ASD and their presumed adverse physiological mechanisms. It comprehensively maps the significance of parental age, teratogenic compounds, perinatal risks, medication, smoking and alcohol use, nutrition, vaccination, toxic exposures, as well as the role of extreme psychosocial factors. Further, we consider the role of potential protective factors such as folate and fatty acid intake. Evidence indicates an increased offspring vulnerability to ASD through advanced maternal and paternal age, valproate intake, toxic chemical exposure, maternal diabetes, enhanced steroidogenic activity, immune activation, and possibly altered zinc–copper cycles and treatment with selective serotonin reuptake inhibitors. Epidemiological studies demonstrate no evidence for vaccination posing an autism risk. It is concluded that future research needs to consider categorical autism, broader autism phenotypes, as well as autistic traits, and examine more homogenous autism variants by subgroup stratification. Our understanding of autism etiology could be advanced by research aimed at disentangling the causal and non-causal environmental effects, both founding and moderating, and gene–environment interplay using twin studies, longitudinal and experimental designs. The specificity of many environmental risks for ASD remains unknown and control of multiple confounders has been limited. Further understanding of the critical windows of neurodevelopmental vulnerability and investigating the fit of multiple hit and cumulative risk models are likely promising approaches in enhancing the understanding of role of environmental factors in the etiology of ASD.

Picking up litter: an application of theory-based communication to influence tourist behaviour in protected areas.

Abstract: Tourism to protected areas worldwide has increased rapidly, prompting management agencies to seek enhanced visitor management including communication aimed at influencing tourists' behaviour to reduce impacts and strengthen conservation viability. Research has shown that the greatest success in influencing visitors' actions comes from understanding what they think about a particular behaviour. This notion was investigated in this study in Mt Field National Park, Tasmania, using the theory of planned behaviour and the elaboration likelihood model of persuasion in a three-stage research process to design specific persuasive messages that were then evaluated for their impact on visitors' beliefs, attitude and behaviour. Of four salient beliefs found through survey, one offered much promise. Two experimental treatments based on that belief resulted in a 15%–20% increase in litter pickup compared with a control condition, and were also found to positively affect targeted beliefs and attitudes relating to this ...

Harm minimization in school drug education: final results of the School Health and Alcohol Harm Reduction Project (SHAHRP).

Abstract: Aims The School Health and Alcohol Harm Reduction Project (SHAHRP study) aimed to reduce alcohol-related harm in secondary school students. Design The study used a quasi-experimental research design in which randomly selected and allocated intervention and comparison groups were assessed at eight, 20 and 32 months after baseline. Setting Metropolitan, government secondary schools in Perth, Western Australia. Participants The sample involved over 2300 students. The retention rate was 75.9% over 32 months. Intervention The evidence-based intervention, a curriculum programme with an explicit harm minimization goal, was conducted in two phases over a 2year period. Measures Knowledge, attitude, total alcohol consumption, risky consumption, context of use, harm associated with own use and harm associated with other people’s use of alcohol. Findings There were significant knowledge, attitude and behavioural effects early in the study, some of which were maintained for the duration of the study. The intervention group had significantly greater knowledge during the programme phases, and significantly safer alcohol-related attitudes to final followup, but both scores were converging by 32 months. Intervention students were significantly more likely to be non-drinkers or supervised drinkers than were comparison students. During the first and second programme phases, intervention students consumed 31.4% and 31.7% less alcohol. Differences were converging 17 months after programme delivery. Intervention students were 25.7%, 33.8% and 4.2% less likely to drink to risky levels from first follow-up onwards. The intervention reduced the harm that young people reported associated with their own use of alcohol, with intervention students experiencing 32.7%, 16.7% and 22.9% less harm from first follow-up onwards. There was no impact on the harm that students reported from other people’s use of alcohol. Conclusions The results of this study support the use of harm reduction goals and classroom approaches in school drug education.