In this course students are introduced to general principles of ecology and the predominant characteristics of the ecosystems of Northern Canada. The physical and energetic raw materials of ecosystems are presented, as well as the driving forces behind ecological diversity. The organization of life from the scale of the biome to the individual is covered, with emphasis on populations, communities and ecosystems. Ecological community structure and change are covered, including the interactions between living organisms. Northern case studies and the predominant effects of Polar climatic conditions on Northern ecosystems are examined in detail through lectures, labs and field exercises.