Introduction

Canada contains one-fourth of the world's wetlands and has been divided into seven wetland regions by the National Wetlands Working Group. These regions (arctic, subarctic, boreal, prairie, temperate, oceanic and mountain) generally resemble broad climatic/vegetation zones. In Canada, these climatic zones follow a north-south temperature gradient and east-west precipitation gradient. The division of wetlands into regions aids in both their study and conservation.