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1980

Addison, P. A.

In 1976-77, a set of 13 jack pine biomonitoring sites was established in the Athabasca Oil Sands area in order to biomonitor both impingement and impact of emissions characteristic of oil sands extraction operations. No measureable air pollutant effect was observed on either vascular or lichen...

1980

Addison, P. A.

Biomonitoring plots established in 1976 and 1977 were revisited in 1979 and quantified with respect to their vascular plant community of the lower stratum, lichen community of black spruce branches, and both soil and plant element contents. There was no measurable change in any of the above...

1982

Addison, P. A., Theriault, F., L'Hirondelle, S., Khan, A. A.

This report describes both the accomplishments to date and the long-term plans of the joint project between the Toxic Substances Program of the Canadian Forestry Service and the Research Management Division of Alberta Environment. No evidence of impact on jack pine physiology was found when...

1979

Baker, J., Addison, P. A.

A set of 11 sites were established in the Alberta Oil Sands Environmental Research Program study area to provide baseline information on vegetation and soils with respect to air pollution impact. Sites were strategically located for use in long-term biomonitoring and were described with respect...

1979

Malhotra, S. S., Addison, P. A.

Six boreal forest plant species were fumigated in a newly developed environmental growth chamber with SO2 control capability,for up to 40 days at 0.34 ppm SO2. All species showed a gradual decline in CO2 gas exchange which was related to symptom development characteristic of SO2 toxicity. Paper...

1979

Malhotra, S. S., Addison, P. A.

The dominant woody boreal forest plant species were fumigated with 0.34 ppm SO2 under controlled conditions in the laboratory in order to rank their physiological and visual sensitivities to the air pollutant. Deciduous trees and shrubs were much more sensitive than conifers, presumably because...

1980

Malhotra, S. S., Khan, A. A.

Several important biochemical functions in an epiphytic lichen, EVernia mesomorpha, in response to controlled SO2 exposures were studied. Appreciable changes in these functions were observed even at a very low SO2 concentration (0.1 ppm), suggesting that epiphytic lichens are probably one of the...

1980

Addison, P. A., Khan, A. A., Malhotra, S. S.

A number of coniferous and deciduous species that had been growing on the Suncor tailings sand dike for five to seven years were fumigated with 0.34 ppm SO2 under controlled environmental conditions. The results obtained were compared with those from similar fumigations of the same species grown...