Back-trajectories Show Export of Airborne Fungal Spores (Ganoderma sp.) From Forests to Agricultural and Urban Areas in England

We propose here the hypothesis that all of United Kingdom (UK) is likely to be affected by Ganoderma sp. spores, an important plant pathogen. We suggest that the main sources of this pathogen, which acts as a bioaerosol, are the widely scattered woodlands in the country, although remote sources must not be neglected. The hypothesis is based on related studies on bioaerosols and supported by new observations from a non-forest site and model calculations to support our hypothesis. Hourly concentrations of Ganoderma sp. spores were measured from 2006 to 2010 using a 7-day volumetric spore trap at the city of Worcester. The concentrations peak during the night and early in the morning. This suggests that the main spore sources are located a few hours away with respect to air masses transport and reach urban areas thanks to air masses transport. The back-trajectory analysis was applied to determine the location of Ganoderma sp. spore sources. The analysis of back-trajectories demonstrated that 78% of the air masses reached Worcester from a 180° arc direction from the East to West. Three episodes were selected for detailed investigation and they revealed that during the episodes air masses always passed main UK woodlands before the arrival in Worcester, independently of their origin, but the long distance transport under certain conditions might be possible. Our studies suggest that the sources of UK Ganoderma sp. spores are mainly to be found in UK. Hence our studies suggest that research and mitigation strategies in UK should give their main attention to national sources, without neglecting the contribution from long distance transport.

Mesoscale Atmospheric Transport of Ragweed Pollen Allergens from Infected to Uninfected Areas

Allergenic ragweed (Ambrosia spp.) pollen grains, after being released from anthers, can be dispersed by air masses far from their source. However, the action of air temperature,humidity and solar radiation on pollen grains in the atmosphere could impact on the ability of long distance transported (LDT) pollen to maintain allergenic potency. Here, we report that the major allergen of Ambrosia artemisiifolia pollen (Amb a 1) collected in ambient air during episodes of LDT still have immunoreactive properties. The amount of Amb a 1 found in LDT ragweed pollen grains was not constant and varied between episodes. In addition to allergens in pollen sized particles, we detected reactive Amb a 1 in subpollen sized respirable particles. These findings suggest that ragweed pollen grains have the potential to cause allergic reactions, not only in the heavily infested areas but, due to LDT episodes, also in the regions unaffected by ragweed populations.

Changing Professional Identity in the Transition from Practitioner to Lecturer in Higher Education: an Interpretive Phenomenological Analysis

This research explores the experiences of five professional practitioners from disciplines including teaching, youth work, sport and health who had become lecturers in Higher Education. Their experiences are considered using Interpretative Phenomenological Analysis and tentative conclusions are reached on the meaning of such experiences for the individuals. The work extends previous studies (Shreeve 2010, 2011; Gourlay 2011a, 2011b; Boyd & Harris 2010) to consider the relationship between knowledge and influence and how institutional preference for knowledge gained from research impacts on the validity of knowledge derived from professional experience. The research finds shared feelings associated with inauthenticity and loss arising from concerns that the contribution of the professional in Higher Education is undervalued. The research challenges the assumption that professional practitioners adopt the professional identity of a lecturer in Higher Education instead finding that they create their own professional identities in the liminal space between the professional and academic domains, but points to difficulties associated with constructed nature of such professional identities within the institutional structure of a Higher Education institution.