Schedule:    September      Introduction      Basic Principles I - Evolution of Ecosystems      Basic Principles II – Species and the Niche Concept      Basic Principles III – Energy Flow and Trophic Levels `      Biogeochemical Cycles I    October      Biogeochemical Cycles II      Rivers    MIDTERM EXAMINATION      Lakes      Estuaries and Wetlands    November      The Oceans      Coral Reefs      Rain forests    December      Hardwood and Boreal Forests    FINAL EXAMINATION