The Natural Heritage Program, with input from other conservation agencies, has compiled 42 groups of ecosystems that share certain ecological characteristics.
Nested within these Ecosystem Groups are Natural Communities and Landscape/Habitat Indicator Guilds, which comprise groups of plant and animal species associated with finer categories of habitats. Nested within each of these habitat groups are individual species or, in some cases, subspecies or distinctive populations.
The draft reports were reviewed by experts, whose input may be incorporated to improve the assessments. For details, read the PDF linked here.
Ecosystem Groups: Click on link below to download a report.