December 2005. Funding for this report was provided by a grant from the Environmental Protection Agency, Office of Wetlands, Oceans and Watershed - Wetlands Division. Includes bibliographical references.

Background -- NatureServe and its network of natural heritage programs -- Key objectives and project tasks -- Methods -- Standard ecological classification -- Geographically isolated wetland ecological systems -- Linking at-risk elements of biodiversity with isolated wetlands -- Animal species linked to isolated wetlands -- Plant species linked to isolated wetlands -- Plant communities linked to isolated wetlands -- Knowledge and data gaps -- Results -- Isolated wetland ecological systems -- At-risk animal species linked to isolated wetlands -- At-risk plant species linked to isolated wetlands -- Known occurrence of at-risk plant and animal species in U.S. Counties -- At-risk plant communities linked to isolated wetlands -- Knowledge and data gaps -- Classifying wetland types -- Implementing a definition of "geographically isolated" -- Gaps in field inventory -- Linking species to ecological systems -- Discussion -- What is at risk? -- Beyond the Clean Water Act: other mechanisms for protecting isolated wetlands -- Endangered species Act -- Agricultural incentive programs -- Non-federal regulations -- Systematic inventory of wetland resources -- Making use of this information.