Applied limnology advisor, mainly for local governments. Editorial boards (past) of Limnology and Oceanography, Journal of Social and Biological Structures, and Human Ecology; Associate Editor, Journal of Economic Behavior and Organization, Editorial Board of Selection and currently on editorial board of Human Ecology Review and Journal of Bioeconomics. Served on Academic Advisory Board of the Committee for the National Institute of the Environment. President, Society for Human Ecology, 1994-95. Treasurer of the Human Behavior and Evolution Society 1999-2005; President Elect 2007-2008. Served as Director of the Institute of Ecology, now the John Muir Institute, at UC Davis 1983-1990. Member of the College of Agricultural and Environmental Sciences Executive Committee, 1987-1990. Member, National Academy of Sciences Committee on the Human Dimensions of Global Environmental Change, 2000-2005. Member, Board of Directors, Davis Faculty Association 2000-2006. Member, Board of Directors, Kufuku Farm Institute.