AGU member since 1998. Associate professor, Center for Limnology and Department of Zoology, University of Wisconsin. Research interests: river and wetland biogeochemistry; interactions between geomorphology and ecology. B.S., biology, Yale University, 1984; M.S., biology, Southwest Texas State University, 1986; Ph.D., zoology, Arizona State University, 1993. Postdoc, University of Alabama, 1993–1995; assistant professor, Oklahoma State University, 1995–1998; assistant professor, University of Wisconsin, 1998–2004, associate professor, University of Wisconsin, 2004 to present. Member of American Society of Limnology and Oceanography, Ecological Society of America (Aquatic Section secretary, 2001–2003), North American Benthological Society (cochair, Conservation and Environmental Issues Committee, 2002–2007, Executive Committee, 2005–2008). Fifty-eight refereed publications, five in AGU journals. Aldo Leopold Leadership Program Fellow, 2006; University of Wisconsin Vilas Associate Award, 2003; member, Associate Editor, Journal of Geophysical Research-Biogeosciences.