Dr. Eichholz is a waterfowl/wetland ecologist in the Cooperative Wildlife Research Laboratory and Center for Ecology and an Assistant Professor in the Department of Zoology, Southern Illinois University. He is interested in investigating the influence of nutrient availability on vital rates and the evolution of life history traits and the relative influence of vital rates on waterfowl population demography. He is particularly interested in investigating how resource availability during the spring influences productivity and population dynamics of waterfowl and how density of waterfowl may influence various reproductive and survival rates. His past research has involved determining the importance of nutrient reserves to clutch size and incubation constancy of Black Brant nesting on the west coast of Alaska, the role of agricultural development in nutrient dynamics and population regulation of Canada geese staging in Interior Alaska, food availability and optimal foraging strategy of waterfowl in moist soil habitats and rice fields in the Central Valley of California, and the development of a technique using postovulatory follicles to estimate breeding propensity in wild populations of waterfowl.