The American Forests Science Advisory Board members represent a diversity of fields, geographic areas and work experience to help address the myriad of issues facing America’s rural and urban forests.

Dr. Mark S. Ashton Yale School of Forestry & Environmental Studies, New Haven, Conn.
Dr. Paul K. Barten Department of Environmental Conservation, University of Massachusetts, Amherst, Mass.
Dr. Cecilia Danks Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, Vt.
Dr. Jerry F. Franklin College of Forest Resources, University of Washington, Seattle, Wash.
Dr. Jennifer Jenkins Applied Geosolutions LLC, Washington, D.C.
Dr. Robert Keane U.S. Forest Service, Rocky Mountain Research Station, Missoula, Mont.
Dr. James Kielbaso (retired) Department of Forestry, Michigan State University, Lansing, Mich.
Dr. Jonathan Kusel Sierra Institute for Community and Environment, Taylorsville, Calif.
Dr. Robert D. Mangold U.S. Forest Service, Pacific Northwest Research Station, Portland, Ore.
Dr. Deborah G. McCullough Department of Entomology and Department of Forestry, Michigan State University, Lansing, Mich.
Dr. Greg McPherson U.S. Forest Service, Pacific Southwest Research Station, Davis, Calif.
Dr. David J. Nowak U.S. Forest Service, Northern Research Station, Syracuse, N.Y.
Dr. Diana F. Tomback Department of Integrative Biology, University of Colorado, Denver, Colo.
Dr. Mark S. Ashton
Dr. Mark S. Ashton is the Morris K. Jesup professor of silviculture and forest ecology and director of school forests at Yale School of Forestry & Environmental Studies in New Haven, Connecticut.  Dr. Ashton conducts research on the biological and physical processes governing the regeneration of natural forests and on the creation of their agroforestry analogs. In particular, he seeks a better understanding of regeneration establishment among assemblages of closely related trees. His long-term research concentrates on tropical and temperate forests of the Asian and American realms. Field sites include tropical forests in Sri Lanka and Panama, temperate forests in India and New England, and boreal forests in Saskatchewan, Canada. Findings from these studies have theoretical implications for understanding the maintenance of a diversity of tree species in forested ecosystems and the adaptability of forests to change in climate. The results of his research have been applied to the development and testing of silvicultural techniques for restoration of degraded lands and for the management of natural forests for a variety of timber and non-timber products. Dr. Ashton received a bachelor’s degree from University of Maine’s College of Forest Resources and a master’s degree in forestry and a doctorate from Yale University.
Dr. Paul K. Barten
Dr. Paul K. Barten is professor of forestry and hydrology at the University of Massachusetts Amherst and executive director of the Great Mountain Forest in northwestern Connecticut. His research includes field and modeling projects focusing on forests, land use, streamflow, water quality and aquatic ecosystems. The primary motivation for this work is the protection of drinking water supplies and aquatic ecosystems in collaboration with local communities, water utilities, nongovernmental organizations and state and federal agencies. In many cases, this involves the development and application of GIS-based analytical methods to identify and prioritize critical areas for conservation, restoration and stormwater management in large, diverse watersheds. He has served on three National Research Council study teams, in 2000, 2004 and 2008, and as scientist-at-large on the research planning committee of the Sustainable Forest Management Network in Canada from 2003 to 2010. He was a Bullard Fellow at the Harvard Forest from 2003 to 2004. Dr. Barten received his associate degree in forestry and surveying from the New York State Ranger School at Wanakena, his bachelor’s degree in forest resources management from the SUNY College of Environmental Science and Forestry, and his master’s and doctoral degrees in forest hydrology and watershed management from the University of Minnesota.
Dr. Cecilia Danks
Dr. Cecilia Danks is an associate professor at the University of Vermont’s Rubenstein School of Environment and Natural Resources/Environmental Program. She also worked for three years as the director of socioeconomic research at the Watershed Research and Training Center in Hayfork, California, and served as a social science analyst for the Clinton administration’s Forest Ecosystem Management Assessment Team (FEMAT-team of scientists that developed the Northwest Forest Plan). Dr. Danks currently teaches an array of courses, including Community Forestry at Home and Abroad, Forest Carbon and Communities, Intermediate Environmental Studies and Integrating Analyses in Natural Resources Issues. Her current grants and research projects focus on climate change, carbon markets and communities, including Carbon Market Access for Urban and Community Forestry (U.S. Forest Service), Effectiveness and Equity in Small Landowner Access to Carbon Markets (USFS, NRCS and others) and the Role of State Government in Effective and Equitable Forest Carbon Markets in the U.S. Dr. Danks received a bachelor’s degree in biology from Williams College in Massachusetts and a master’s degree and doctorate in wildland resource science from University of California, Berkeley.
Dr. Jerry F. Franklin
Dr. Jerry F. Franklin is a professor of ecosystem analysis at the College of Forest Resources, University of Washington. His areas of specialization include: structure and function of natural forest ecosystems, especially old-growth forests; successional processes and ecosystem recovery following catastrophic disturbances; the effects of changing environmental conditions, such as global change, on forest processes; the application of ecological principles to management of natural resources (“New Forestry,” ecosystem management); and the theory and practice of landscape ecology. A forest ecologist and progenitor of a new paradigm integrating ecological and economic objectives in managing the nation’s forests, Dr. Franklin has been called the “father of new forestry.” He is one of the country’s leading authorities on sustainable forest management and maintaining healthy forest ecosystems. In May 2005, Dr. Franklin was awarded the 11th Annual Heinz Award for the Environment which recognizes the extraordinary achievements of individuals and highlights the power an individual can have on American society. Dr. Franklin received his bachelor’s degree in forest management and his master’s degree is forest management and statistics from Oregon State University, his doctorate in botany and soils from Washington State University, and his LLD. from Simon Fraser University.
Dr. Jennifer Jenkins
Dr. Jennifer Jenkins is the Director of Science and Strategy at Applied Geosolutions, LLC (AGS) in Washington, D.C., and develops partnerships with both political agencies and nongovernmental sectors who focus on sustainable development, greenhouse gas mitigation and adaption, food security and agricultural and forestry programs. Prior to joining AGS in 2014, Dr. Jenkins worked in the Climate Change Division at the Environmental Protection Agency (EPA). At the EPA, she was the primary expert on forest-related climate policy and the physical scientist who accounted for greenhouse gas emissions from bioenergy and other biogenic sources for policies like the Clean Air Act. She was a member of the research team and science advisory board at the University of Vermont’s Rubenstein School of Natural Resources from 2002 to 2009, was a research forester at the U.S. Forest Service from 1998 to 2002 and shares the Nobel Peace Prize with authors and editors of work by the Intergovernmental Panel on Climate Change and former Vice President Al Gore. Dr. Jenkins received a bachelor’s degree in biology with an environmental studies and education concentration from Dartmouth College, a master’s degree in forest science from Yale University’s School of Forestry and Environmental Studies, and a doctoral degree in natural resources from the University of New Hampshire.
Dr. Robert Keane
Dr. Robert “Bob” Keane is a research ecologist with the U.S. Forest Service Rocky Mountain Research Station at the Fire Sciences Laboratory in Missoula, Montana. He is also deputy manager of the Fire, Fuel and Smoke Science Program and director of the Fire Modeling Institute. His areas of expertise are landscape and ecosystem modeling, whitebark pine restoration, wildland fuel science, fuel mapping, fire hazard and risk analysis, fire ecology and fire regimes. He serves as a board member of the Whitebark Pine Ecosystem Foundation. Dr. Keane received a bachelor’s degree in forest engineering from University of Maine, Orono; master’s degree in forest ecology from University of Montana, Missoula; and a doctorate in forest ecology from University of Idaho, Moscow.
Dr. James Kielbaso
Dr. James Kielbaso retired in 2004 as professor emeritus in the Department of Forestry at Michigan State University. He taught arboriculture and urban forestry courses among many others at Michigan State for 38 years. He also conducted research on topics such as improving compacted soils for planting, the status of street trees nationally, management practices of U.S. urban foresters, herbicide use by U.S. utilities and social attitudes toward neighborhood trees. Dr. Kielbaso has served on the National Urban and Community Forestry Advisory Council, the International Society of Arboriculture’s Board of Directors and the Michigan Forestry and Park Association’s Board of Directors. Dr. Kielbaso received a bachelor’s degree from University of Dayton and master’s degree and doctorate in forestry from Michigan State University.
Dr. Jonathan Kusel
Dr. Jonathan Kusel founded and has for 18 years directed the nonprofit Sierra Institute for Community and Environment in Taylorsville, California. He left academia to found the Institute, which focuses on the human-natural resource interaction focusing on research, education and project implementation. Dr. Kusel participated on the Clinton administration’s Forest Ecosystem Management Assessment Team; participated on the core team and led the community assessment team and public participation team for the Sierra Nevada Ecosystem Project (SNEP); and led a national assessment of the Secure Rural School and Community Self-Determination Act, which contributed to refinement and passage of new legislation. He has launched watershed groups and is currently involved in establishing watershed-based pilot ecosystem service assessments. He recently completed assessments that helped launch the Burney-Hat Creek Community Forest and Watershed Group and is currently working with groups to advance the use of biomass to restore forests and local resource economies. Dr. Kusel received a bachelor’s degree from Oberlin College, a master’s degree in forest science from the Yale School of Forestry & Environmental Studies and a doctorate in natural resource sociology and policy from the University of California, Berkeley.
Dr. Robert D. Mangold
Dr. Robert D. Mangold is the station director of the U.S. Forest Service Pacific Northwest Research Station in Portland, Ore. Prior to that he served as the director of Forest Health Protection for the U.S. Forest Service in Washington, D.C., as the acting deputy director of the Forest Health Protection staff in State and Private Forestry and as the National Forest Health Monitoring program manager. He also worked on the Cooperative Forestry staff in Washington as the national nurseries and tree improvement manager. Dr. Mangold began his career with the Forest Service in 1988 at Umpqua National Forest in Oregon, where he worked as a geneticist at the Dorena Tree Improvement Center. He also worked in private industry for six years as a tree breeder with Crown Zellerbach Corporation. Dr. Mangold received a bachelor’s degree from the University of New Hampshire, a master’s degree from the University of California, Berkeley, and a doctorate in forest genetics from Oregon State University.
Dr. Deborah G. McCullough
Dr. Deborah G. McCullough is a professor of forest entomology with a dual appointment to the Department of Entomology and Department of Forestry at Michigan State University. Dr. McCullough has an active research, extension and teaching program in forest entomology. She works closely with natural resource agencies, Christmas tree growers and private landowners to identify impacts and contributing factors associated with damaging forest insect populations, and to develop long-term management strategies to conserve or enhance forest health. Her research interests include invasive forest insect ecology, impacts and management; dynamics of forest insect populations; silvicultural and biological control of forest insect pests; and effects of disturbance on forest insect communities. Dr. McCullough’s current research projects include: Emerald Ash Borer biology, ecology and methods to enhance survey and containment efforts; the spread and impact of Beech Bark Disease; and Jack Pine ecology and management. She is a member of multi-disciplinary working group assigned to identify nonindigenous forest insects and pathogens established in the U.S., the economic impacts associated with major forest pests and effects of invasive forest pests on ecosystem services. Dr. McCullough received her bachelor’s degree in biology and her master’s degree in forestry from Northern Arizona University, and her doctorate in entomology from the University of Minnesota.
Dr. Greg McPherson
Dr. Greg McPherson is a research forester with the U.S. Forest Service Pacific Southwest Research Station located in Davis, California. He grew up under a canopy of American elm trees in Howell, Michigan. Despite attempts to save the trees, all were lost to Dutch elm disease. Having felt the sting of that loss, he became a “green” accountant, developing new methods and tools for quantifying the value of nature’s benefits from city trees. Dr. McPherson works with a team of three other scientists who measure and model the effects of trees on energy use, urban heat islands, air pollutant uptake, carbon sequestration and rainfall interception. Their research is helping justify investments in urban forest planning and management.In 2000, Dr. McPherson received the International Society of Arboriculture’s (ISA) L.C. Chadwick Award for Research. He chaired the ISA Science and Research Committee and serves on the California Urban Forest Council’s Policy Advisory Committee. Dr. McPherson received a bachelor’s degree of general studies from University of Michigan, a master’s degree in landscape architecture from Utah State University and a doctorate in forestry from SUNY College of Environmental Science and Forestry.
Dr. David J. Nowak
Dr. David J. Nowak is a project leader with the U.S. Forest Service Northern Research Station in Syracuse, New York. His research investigates urban forest structure, health and change and its effect on air quality and greenhouse gases. He also leads teams developing software tools to quantify ecosystem services from urban vegetation (e.g. UFORE and i-Tree programs). Dr. Nowak has authored more than 200 publications and was a contributing member of the 2007 Nobel Peace Prize-winning Intergovernmental Panel on Climate Change. He has also received several nation awards, including National Arbor Day Foundation’s highest honor, the J. Sterling Morton Award, which recognizes lifelong commitment to tree planting and conservation at a national or international level; R.W. Harris Author’s Citation from the International Society of Arboriculture, which is granted to authors of outstanding publications for sustained excellence in the publication of timely information pertaining to the field of arboriculture; and American Forests’ Urban Forest Medal recognizing outstanding national contributions in urban forest research. Dr. Nowak received a bachelor’s and a master’s degree from SUNY College of Environmental Science and Forestry and a doctorate from University of California, Berkeley.
Dr. Diana F. Tomback
Dr. Diana F. Tomback is a professor (and acting chair) of integrative biology at the University of Colorado, Denver. Her expertise includes evolutionary ecology with application to forest ecology and conservation biology. Dr. Tomback is best known for her studies of the coevolved, mutualistic interaction between Clark’s nutcracker, a bird of high mountain forests, and several white pine species, particularly whitebark pine, leading to her election in 1994 as fellow of the American Ornithologists’ Union. She was the lead organizer and editor of the book Whitebark Pine Communities: Ecology and Restoration, published by Island Press in 2001. This work has grown in significance, with the recent status review of whitebark pine under the Endangered Species Act by the U.S. Fish and Wildlife Service.In 2001, Tomback and several colleagues started the Whitebark Pine Ecosystem Foundation (WPEF), a 501 (c)(3) nonprofit based in Missoula, Montana. The WPEF is dedicated to the restoration of whitebark pine ecosystems and educating the public and resource management agencies about the importance of this pine. She has served as volunteer director of this organization since its inception. Dr. Tomback received her bachelor’s and master’s degrees in zoology from UCLA and her doctorate in biological sciences from University of California Santa Barbara.