This book describes the ecoregions of Saskatchewan, following a hierarchical framework for terrestrial ecosystems in Canada. The introduction reviews ecological land classification and the various interrelated factors that are involved in the development of ecosystems: geology, water, climate, vegetation, soils, wildlife, and human impacts. The main section describes the province within the context of the four ecozones and 11 ecoregions that were identified in the framework. For each ecoregion, the book provides a description of the physical setting, such as geology & climate, as well as the biological features that have developed in response to this physical environment. The impact of human activities on the ecology of the area concludes each of these descriptions. Appendices include lists of animal & plant species found in Saskatchewan and a glossary.