. The Canadian field-naturalist. Natural history; Sciences naturelles. 22 The Canadian Field-Naturalist Vol. 121. 40- Cover % Easting (km) Northing (l<m) Figure 3. Lichen species richness (a) and total cover (b) in relation to location. The surface is a distance-weighted least squares regression, tension 1. The view is from the northwest towards the southeast. Coordinates are in Alberta provincial lOTM projection. Despite widespread public concern, independent, journal-published studies of the relationships between air pollution and human health downwind of the Strath- cona Industrial Area
. The Canadian field-naturalist. Natural history; Sciences naturelles. 22 The Canadian Field-Naturalist Vol. 121. 40- Cover % Easting (km) Northing (l<m) Figure 3. Lichen species richness (a) and total cover (b) in relation to location. The surface is a distance-weighted least squares regression, tension 1. The view is from the northwest towards the southeast. Coordinates are in Alberta provincial lOTM projection. Despite widespread public concern, independent, journal-published studies of the relationships between air pollution and human health downwind of the Strath- cona Industrial Area have not been conducted to date. Alberta Health (1996) conducted a small, short-term study of respiratory disease rates in Strathcona Coun- ty and Fort Saskatchewan. They were unable to detect above normal rates of mortality and hospital admis- sions but observed above normal rates of physician vis- its for asthma. As a large human population is needed for robust statistical analyses, the statistical power of that study was limited. Ozone, acid aerosols, nitrogen oxides, volatile organic compounds, and particulates may be responsible for adverse health effects at current levels of exposure (Alberta Health 1996).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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