The Alien Flora of Australia (AFA), a unified Australian national dataset on plant invasion.

Biological invasions are a major threat to Australia. Information on alien flora in Australia is collated independently by different jurisdictions, which has led to inconsistencies at the national level, hampering efficient management. To harmonise different information sources, we present the Alien Flora of Australia (AFA), a nationally unified dataset. To create the AFA, we developed an R script that compares existing data sources (the Australian Plant Census and state and territory censuses), identifies mismatches among them and integrates the information into unified invasion statuses at the national scale. The AFA follows the taxonomy and nomenclature adopted for the Australian Plant Census, introduction status and impact of plants known to occur in Australia. The up-to-date information presented in this dataset can aid early warning of alien species invasions, facilitate decision-making at different levels, and biosecurity at national scale. The associated script is ready to be implemented into new versions of the AFA with updated releases of any of the data sources, streamlining future efforts to track of alien flora across Australia.

Carbon allocation during fruiting in Rubus chamaemorus.

BACKGROUND AND AIMS: Rubus chamaemorus (cloudberry) is a herbaceous clonal peatland plant that produces an extensive underground rhizome system with distant ramets. Most of these ramets are non-floral. The main objectives of this study were to determine: (a) if plant growth was source limited in cloudberry; (b) if the non-floral ramets translocated carbon (C) to the fruit; and (c) if there was competition between fruit, leaves and rhizomes for C during fruit development. METHODS: Floral and non-floral ramet activities were monitored during the period of flower and fruit development using three approaches: gas exchange measurements, (14)CO(2) labelling and dry mass accumulation in the different organs. Source and sink activity were manipulated by eliminating leaves or flowers or by reducing rhizome length. KEY RESULTS: Photosynthetic rates were lower in floral than in deflowered ramets. Autoradiographs and (14)C labelling data clearly indicated that fruit is a very strong sink for the floral ramet, whereas non-floral ramets translocated C toward the rhizome but not toward floral ramets. Nevertheless, rhizomes received some C from the floral ramet throughout the fruiting period. Ramets with shorter rhizomes produced smaller leaves and smaller fruits, and defoliated ramets produced very small fruits. CONCLUSIONS: Plant growth appears to be source-limited in cloudberry since a reduction in sink strength did not induce a reduction in photosynthetic activity. Non-floral ramets did not participate directly to fruit development. Developing leaves appear to compete with the developing fruit but the intensity of this competition could vary with the specific timing of the two organs. The rhizome appears to act both as a source but also potentially as a sink during fruit development. Further studies are needed to characterize better the complex role played by the rhizome in fruit C nutrition.

Eat Well Australia: Developing a national strategic framework for public health nutrition.

In Australia, diet-related disease ranks alongside tobacco-related disease as the most important preventable health area, accounting for at least 10% of the total burden of disease. A population approach to improve the nutrition of all Australians is a vital contribution to the nation's overall health and well-being, yet action has often been ineffective, uncoordinated and poorly resourced. Through the National Public Health Partnership's nutrition group, SIGNAL, an ambitious work program has been commenced to address this situation. This includes the development of a national framework for action in public health nutrition 2000-2010. Following extensive consultation with health groups and the food industry, the strategy, Eat Well Australia, is now in a late stage of development. Key priorities have been agreed and focus on: (i) Aboriginal and Torres Strait Islander people; (ii) vulnerable groups; (iii) maternal and child health; (iv) overweight and obesity; and (v) fruit, vegetables and legumes. Eat Well Australia should provide a new pathway for more concerted and integrated action from a wide range of organizations and interest groups. As a core component, SIGNAL has also developed an action plan to promote comsumption of fruits, vegetables and legumes, which should mobilize responses at local, regional and national levels. Close cooperation between the food industry and the governmental and non-governmental sectors will be vital for success. A partnership platform is needed with clearly defined directions, operating principles and roles and responsibilities. Encouragingly, new and energetic alliances are now developing, which will be supported by Eat Well Australia.

Effects of the Heartbeat Wales programme over five years on behavioural risks for cardiovascular disease: quasi-experimental comparison of results from Wales and a matched reference area.

OBJECTIVE: To assess the net 5 year effects of intervention of a community based demonstration project, the Heartbeat Wales programme, on modifiable behavioural risks for prevention of cardiovascular disease. DESIGN AND SETTING: Quasi-experimental design comparing results from two independent cross sectional population surveys conducted in 1985 and 1990 in Wales and a matched reference area in north east England. SUBJECTS: Random, stratified samples of people aged 18-64 years (18,538 in 1985 and 13,045 in 1990) in Wales and in north east England (1483 and 4534, respectively). INTERVENTION: A coordinated range of activities for heart health promotion in Wales entailing public education campaigns along with supportive policy and infrastructure change. In the reference area no additional community heart health promotion was planned, though considerable activity did take place, "contaminating" the reference area. MAIN OUTCOME MEASURES: Fifteen self reported behavioural indicators relating to dietary choice, smoking, frequency of exercise, and weight. RESULTS: Positive changes (for health) in behavioural outcomes were observed among the population in Wales, including a reduction in reported smoking prevalence and improvements in dietary choice. There was no net intervention effect for the programme over and above observed change in the reference area. CONCLUSIONS: No definite conclusions can be drawn concerning the efficacy of the programme in terms of behavioural outcomes. With hindsight, the difficulties of evaluating such a complex multifaceted intervention were underestimated. Further debate on the most appropriate methods for assessing the effectiveness of community based health promotion programmes is called for.

Current changes in smoking attitudes and behaviours among adolescents in Wales, 1986-1992.

This paper presents data on recent trends in adolescent smoking in Wales. The data are drawn from four large-scale surveys conducted across the Principality in 1986, 1988, 1990 and 1992. The results show that there has been some success in delaying early experimentation with smoking, as well as some improvement in the attitudes of smokers towards their habit. Against this, there has been little change in smoking prevalence amongst both boys and girls, and cigarettes remained widely available for purchase by the under-16s. The implications of these findings for further action on smoking and the young are discussed.

Health-related behaviour in Wales, 1985-1990.

This study looked at recent changes in Wales in four health-related behaviours: smoking, alcohol consumption, diet and physical activity. Data are drawn from three large-scale surveys conducted across Wales in 1985, 1988 and 1990. The results show a reduction in smoking prevalence between 1985 and 1990 among men and women, and a growing trend towards healthier eating, with reduced frequent consumption of salt and foods high in saturated fats. Encouraging progress towards healthier living has been made, but the results also indicate the extent of the remaining challenge: greater progress is particularly needed to encourage participation in exercise, and to reduce the numbers of people who drink alcohol in excess of recommended sensible limits.

Maintaining evaluation designs in long term community based health promotion programmes: Heartbeat Wales case study.

STUDY OBJECTIVE: To examine the difficulties of developing and maintaining outcome evaluation designs in long term, community based health promotion programmes. DESIGN: Semistructured interviews of health promotion managers. SETTING: Wales and two reference health regions in England. PARTICIPANTS: Nine health promotion managers in Wales and 18 in England. MEASUREMENTS AND MAIN RESULTS: Information on selected heart health promotion activity undertaken or coordinated by health authorities from 1985-90 was collected. The Heartbeat Wales coronary heart disease prevention programme was set up in 1985, and a research and evaluation strategy was established to complement the intervention. A substantial increase in the budget occurred over the period. In the reference health regions in England this initiative was noted and rapidly taken up, thus compromising their use as control areas. CONCLUSION: Information on large scale, community based health promotion programmes can disseminate quickly and interfere with classic intervention/evaluation control designs through contamination. Alternative experimental designs for assessing the effectiveness of long term intervention programmes need to be considered. These should not rely solely on the use of reference populations, but should balance the measurement of outcome with an assessment of the process of change in communities. The development and use of intervention exposure measures together with well structured and comprehensive process evaluation in both the intervention and reference areas is recommended.

Evaluation of two school smoking education programmes under normal classroom conditions.

OBJECTIVES: To assess the effectiveness of two school based smoking education projects in delaying onset of smoking behaviour and in improving health knowledge, beliefs, and values. DESIGN: Cluster randomised controlled trial of two projects taught under normal classroom conditions. Schools were allocated to one of four groups to receive the family smoking education project (FSE); the smoking and me project (SAM); both projects in sequence (FSE/SAM); or no intervention at all. SETTING: 39 schools in Wales and England matched for size and catchment profile. SUBJECTS: All first year pupils in the schools were included and were assessed on three occasions (4538 before teaching (1988), 3930 immediately after teaching (1989), 3786 at one year follow up (1990)). MAIN OUTCOME MEASURES: Self reported smoking behaviour (backed by saliva sample) and change in relevant health knowledge, beliefs, and values. RESULTS: No consistent significant differences in smoking behaviour, health knowledge, beliefs, or values were found between the four groups. For never smokers at baseline the rate of remaining never smokers in 1990 was 74% (594/804) in the control group, 65% (455/704) in the FSE group, 70% (440/625) in the SAM group, and 69% (549/791) in the FSE/SAM group (chi 2adj = 6.1, df = 3, p = 0.1). Knowledge about effects of smoking rose in all groups from a mean score of 5.4 in 1988 to 6.4 in 1989 and 6.5 in 1990. CONCLUSIONS: More comprehensive interventions than school health education alone will be needed to reduce teenage smoking. Other measures including further restrictions on access to cigarettes and on the promotion of tobacco products need to be considered. Further research will be needed to develop effective school based health education projects, which should be formally field tested under normal conditions before widespread dissemination.

Root factors stimulate 32 P uptake and plasmalemma ATPase activity in vesicular-arbuscular mycorrhizal fungus, Gigaspora margarita.

Root-inducing (Ri) T-DNA transformed roots of carrot were used as the plant partner in a study of 32 P absorption and plasmalemma ATPase activity in the hyphae of the vesicular-arbuscular mycorrhizal fungus Gigaspora margarita Becker & Hall. Hyphae from germinating spores were grown in the presence or absence of root exudates and volatiles. In the presence of these root factors, 32 P isotope labelling occurred in hyphae, auxiliary cells and spores, while in the absence of these factors, the labelling only occurred in fungal spores. Similarly, ATPase activity appeared on the fungal plasmalemma only in the presence of root factors. The use of the ATPase inhibitor, diethylstilbestrol, demonstrated the importance of plasmalemma ATPase in the stimulation of hyphal growth of this obligately biotrophic fungus.

Modifiable risks for cardiovascular disease among general practitioners in Wales.

A random cluster sample of 520 general practitioners in Wales was invited to complete a postal questionnaire providing information on personal health status, and practice organisation and activities relating to the prevention of cardiovascular disease. Survey participants were also asked to provide a blood sample together with details of independently measured height, weight and blood pressure. 310 (60%) provided usable information and 280 (54%) provided blood samples. General practitioners in the study generally had better lifestyles and fewer coronary risk factors than the general population in Wales. Only 17% (43/251) of males were regular smokers, and 56% (134/239) of males and 32% (18/68) of females regularly take exercise. Few and uncontrolled elevated blood pressure. However, 39% (97/248) of males and 29% (15/52) of female GPs were overweight, and more than 40% (19/42) of male GPs aged 40-64 had cholesterol levels above 6.5 mmol. Six per cent (6/99) of male GPs aged 40-54 consumed greater than 35 units of alcohol each week. It is suggested that GPs have responded well to the challenges of reducing smoking among themselves and their patients, but that they have yet to recognise fully the risks to personal health associated with elevated cholesterol levels and high alcohol consumption.

Public knowledge and attitudes to AIDS.

Three independent cross-sectional surveys of public knowledge and attitudes about AIDS were conducted on a representative sample of people aged 15-54 resident in Wales. 1,303 were interviewed in their homes in February 1987, 683 in September 1987 and 676 in March 1988. The results show that most people knew that having sexual intercourse or sharing needles with people with AIDS represented a high risk of catching AIDS. However there appeared to be considerable misunderstanding about the nature of HIV infection such that one in three thought that a man and woman with a single heterosexual partner was at high or moderate risk of catching AIDS. The high level of concern coupled with considerable confusion appears to have contributed to both unnecessary anxiety and prejudice. One in four people thought that kissing or being spat on by a person with AIDS represented a high or moderate risk, and one in six thought that coughing, sneezing and sharing towels, soap, drinking utensils or lavatory seats were routes of transmission. More than 50% of men and 40% of women said that it was their own fault if homosexuals and drug addicts got AIDS and did not feel sorry for them. It is concluded that action to date to limit the spread of AIDS has informed but not yet adequately educated the public. If unwanted anxieties and prejudice are to be diminished, initiatives by government, health services and others must now concentrate on developing understanding about the nature of HIV infection and its spread through more personal education.(ABSTRACT TRUNCATED AT 250 WORDS)

Understanding childrens' health behaviour: the implications for health promotion for young people.

Understanding the causes and determinants of young people's health behaviour is central to the development of relevant and effective health promotion programmes. This paper traces the development of health education programmes in the past two decades, identifying the influence of a range of concepts and theories which emerged during that period. Drawing on results from a WHO Cross-National Study of children's health behaviour, the relationships between individual behaviours and a range of social and environmental influences are illustrated, together with the inter-relationship between individual behaviours as 'lifestyles'. The implications for health education programmes from the results are identified and special emphasis is given to the need to communicate effectively with young people through a range of networks and through the media, as well as through traditional school health education. The need to continue research into 'lifestyles' is also stressed.

Blood pressure and blood lead in surveys in Wales.

The association between blood pressure and blood lead level was examined in two population surveys in Wales. In a survey of 1,721 male and female subjects throughout the principality, there was evidence of a marked relation of blood pressure with age, but when this was removed no residual association with blood lead remained. In a survey of 1,164 older men in Caerphilly, there was no evidence of an association between blood lead and either resting blood pressure or the rise in blood pressure during a cold pressor test.

Human cysticercosis and intestinal parasitism amongst the Ekari people of Irian Jaya.

A random sample of 242 people showed that 42 had palpable cysts of Taenia solium. Faecal examination recovered eggs of T. solium in seven (3%), while Trichuris (83%), Ascaris (83%), hookworms (76%), Strongyloides stercoralis (10%) and Strongyloides sp. (29%), Entamoeba histolytica (14%), Entamoeba coli (22%), Entamoeba hartmanni (7%), Entamoeba polecki (7%), Balantidium coli (9%) and Dientamoeba fragilis (21%) were the most common other intestinal parasites encountered. ELISA tests, using antigens prepared from adults and eggs of T. solium and from cysticerci of T. saginata were not very sensitive, the last diagnosing less than half of known positives while still retaining good specificity.