This thesis is comprised of four chapters that examine various aspects of remote sensing for ecological management in Theodore Roosevelt National Park. Chapter one reviews the use of remote sensing as a management tool and discusses its applications in TRNP. Chapter two describes the application of multiple remote sensing methods and how well they can detect and map invasive vegetation, particularly leafy spurge. Chapter three provides a study on defining and mapping vegetation communities in TRNP at varying spatial scales. Chapter four explores the use of remote sensing techniques to detect prairie dog mounds and map colonies.