The use of lichens as indicators of ambient air quality in Southern Ontario

The inverse relationship between arboreal lichen species richness and sulphur dioxide in ambient air has been thoroughly documented in the literature. Previous work in southern Ontario has shown that lichen bioindication can identify areas of potential concern regarding air quality. The EMAN suite of l i chens was applied in the City of Samia by surveying 458 Sugar Maple trees, in order to test the applicability of lichen bioindication under conditions of high mean S02 levels and high species richness values. The results of the survey were explored using Geographic Information Systems. A spatial relationship between lichen community variables, the Bluewater Bridge and the highway was identified. Lichen species richness, lichen percent cover and Index of Atmospheric Purity values were higher along the bridge and highway. No strong gradients were found between other known pollution sources and no lichen deserts were identified. The most common community grouping consisted of Physcia millegrana Degel, Candelaria concolor (Dicks) B. Stein, Physcia aipolia (Ehrh ex Humb.) Furnrohr; all of which are known nitrophytes. The relationship between substrate pH and lichen species richness was examined. Sites with a known source of anthropogenic chemical contamination were found to have a correlation of l=0.8 between lichen species richness and pH. The inverse was found for sites with no known source of contamination with a correlation of r 2 =-0.72. The findings suggest that species richness may be influenced by altering substrate pH which promotes the growth of nitrophytic species capable of tolerating high S02 levels.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1855 & 1856

These are the annual proceedings of the Grand Lodge A.F. & A.M. of Canada in the Province of Ontario covering a single year of activity. The entire collection of proceedings cover the years 1855 to 2010. Future proceedings will be added to the website. Freemasonry is the oldest and largest worldwide fraternity dedicated to the Brotherhood of Man under the Fatherhood of a Supreme Being. In Ontario, the governing body is called the Grand Lodge of Ancient Free and Accepted Masons of Canada in the Province of Ontario. It is under the leadership of the Grand Master. He presides over the 53,000 Masons who belong to one or more of the 571 lodges in his jurisdiction.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1857

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1858

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1859

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1860

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1861

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1864

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1865

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1866

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1867

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1868

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1869

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1870

On spine : The Grand Lodge of Canada in the Province of Ontario.

Proceedings : Grand Lodge, A.F. & A.M. of Canada in the Province of Ontario - 1871

On spine : The Grand Lodge of Canada in the Province of Ontario.