Current Watershed Conditions
Sault Ste. Marie Region Conservation Authority (SSMRCA)
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Forest Conditions

Three indicators were used to assess forest conditions
Three indicators were used by Conservation Authorities to assess forest conditions at the watershed and subwatershed scale: Percent Forest Cover, Percent Forest Interior, and Percent Riparian Zone Forested. Conservation Authorities use the data available to them to calculate forest conditions.

Forest Cover - Most Conservation Authorities use Southern Ontario Land Resources Information System (SOLRIS) I or II mapping data as the primary source of forest cover. As well, forested or wooded area can easily be measured using GIS (Geographic Information System) technology. Depending on resources, some Conservation Authorities will have newer or improved mapping.

In the watershed report cards, the words 'forest' and 'woodland' are used interchangeably. Because Conservation Authorities use GIS, the SOLRIS definition for woodland is used, with 'woodland' describing areas with more than 60% tree cover and greater than 2m in height. This aligns with the Ecological Land Classification for Southern Ontario (Ontario Ministry of Natural Resources 1998).

Forest Interior – Forest interior refers to the protected core area found inside a woodlot that some bird species require to nest and breed successfully. The outer 100 metres perimeter of a woodlot is considered 'edge' habitat and prone to high predation, sun and wind damage, and is more susceptible to invasive species. For these report cards, forest interior is that portion of a woodlot that remains when a 100m buffer is removed from the inside perimeter of a wood lot (e.g. 100m from the outside edge).

Riparian Zone Forested – The watershed report cards track and measure the riparian zone (or buffer zone of vegetation) which is a swath of land, 30 metres wide, on both sides of a river or stream. These vegetation zones are important areas because they have many functions: they provide important habitat for birds, fish and other wildlife and organisms, it helps to improve water quality by filtering sediment and contaminants, and it is essential in helping to reduce or prevent flooding and erosion.
In the Sault Ste. Marie Region Watershed 

The percentages of forest cover, forest interior, and forested riparian area cover were measured with Geographic Information Systems (GIS) using available vegetation and watercourse data from Ontario Land Information Data not SOLRIS which was used in Southern Ontario. 

What Did we Find?

  • Grades across the watershed vary from A to F, with an overall Grade of B. Forest conditions vary due to pressure from urbanization and industry.
  • Forest Cover averages 60%.
  • Forest Interior averages 30%.
  • Forested Riparian Zone averages 60%.
Grades ranged from A to F   
Overall Grade of B        
Click on map below to view map