John Wesley Powell Center for Analysis and Synthesis

Science Advisory Board

The Powell Center Science Advisory Board (SAB) reviews proposals and makes recommendations to the Directors who make the final decisions about which proposals to support. SAB members may not be subject matter experts; write proposals that are understandable and compelling to non-specialists.

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Dr. Jill Baron
Ecosystem Ecologist
Powell Center Director
U.S. Geological Survey

Dr. Jill Baron is an ecosystem ecologist with the U.S. Geological Survey, and a Senior Research Ecologist with the Natural Resource Ecology Laboratory at Colorado State University. Her interests include applying ecosystem concepts to management of human-dominated regions, and understanding the biogeochemical and ecological effects of climate change and atmospheric nitrogen deposition to mountain ecosystems. She is co-director of the John Wesley Powell Center for Earth System Science Analysis and Synthesis.

Photo of Martin Goldhaber

Dr. Martin Goldhaber
Senior Scientist Emirates 
Powell Center Director
U.S. Geological Survey

Dr. Marty Goldhaber is geochemist and currently a Senior Scientist at the USGS where he received the Department of the Interior Meritorious Service and Presidential Rank Awards. He has served a rotation as the Chief Scientist for Geology and has also served as co-chair of the USGS Science Strategy Team which was charged with defining key strategic directions for the USGS. His current research is on the evolution of the broad ‘geochemical landscapes’ resulting from the interplay of geologic, geomorphologic, hydrologic, and biologic processes. Geochemical landscape studies are underway in the Sacramento Valley of California, and the Prairie Pothole region of the north central U.S. and southern Canada.

Dr. Darius Semmens
Research Physical Scientist
Geosciences and Environmental Change Science Center
U.S. Geological Survey

Dr. Darius Semmens is a research physical scientist at the USGS Geosciences and Environmental Change Science Center in Denver. His research focuses on modeling the spatial dynamics of ecosystem service production and flows to beneficiaries, as well as how this type of information can inform resource management. He has projects focused on mapping social value for cultural ecosystem services, quantifying the spatial ecological/economic subsidies of migratory species, and developing an integrated resource assessment framework.


Dr. Victor Labson
Office of International Programs
U.S. Geological Survey

Dr. Victor Labson’s career with the U.S. Geological Survey has been focused on the application of ground and airborne geophysical methods to quantitative imaging of the Earth with applications including deep crustal mapping, mineral resource appraisals, geologic hazards, environmental contamination, national security issues, and water supply development and quality. His most recent scientific focus has been on the understanding of the relationship of the chemical and physical properties of the Earth to resultant geophysical phenomena.


Dr. Steve Perakis
Research Ecologist
U.S. Geological Survey

Dr. Steve Perakis is a research ecologist with the USGS Forest and Rangeland Ecosystem Science Center, and courtesy faculty at Oregon State University. He is interested broadly in the ecological biogeochemistry of forests, grasslands, riparian and watershed ecosystems. Specific studies examine how disturbance, land-use, climate change, atmospheric deposition, plant communities, and soil development influence cycles of carbon, nitrogen and other essential elements that sustain ecosystems and society.


Dr. Patty Toccalino
U.S. Geological Survey

Dr. Patty Toccalino’s expertise lies at the interfaces between environmental chemistry, toxicology, risk assessment, and contaminant fate and transport. Her interests include the occurrence and potential human-health significance of contaminants in drinking-water resources, including chemical mixtures and emerging contaminants. She was faculty at the Oregon Health & Science University before joining USGS. Patty is the Deputy Program Coordinator for the National Water Quality Program.


Dr. Wayne Thogmartin
U.S. Geological Survey

Dr. Wayne Thogmartin is a research ecologist with the Upper Midwest Environmental Sciences Center in La Crosse, WI, conducting scholarly research at the intersection of animal ecology, spatial and temporal analyses, and statistics. His interests include research in population ecology for animals declining in abundance, asking new questions of multiple, combined data sets to gain novel insight into the dynamics of animal populations, and translating science into guidance for practical, applicable management decisions.


Dr. Laura Lautz
U.S. National Science Foundation

Dr. Laura Lautz is a Program Director in the Hydrologic Sciences Program in the Directorate of Geosciences’ Earth Science Division at the National Science Foundation. Prior to her arrival at NSF, she was the Jessie Page Heroy Professor and Department Chair of Earth Sciences at Syracuse University. Her research addresses how hydrologic processes influence water quality and movement through watersheds, with particular emphasis on how water and solutes move through paired surface and groundwater systems, heat tracing, and the nexus of water and energy systems.


Dr. Daniel Gruner
U.S. National Science Foundation

Dr. Daniel Gruner is an ecologist and Associate Professor in the Department of Entomology at the University of Maryland. Currently, he is serving as a rotating Program Director with the Division of Environmental Biology at the National Science Foundation. He serves with the Population and Community Ecology cluster, the Macrosystems Biology and NEON-Enabled Science program, and the cross-directorate AccelNet ‘network of networks’ initiative. His current research is on species interactions, biological invasions, community ecology, and statistical modeling of diverse arthropod food webs in forests and grasslands ecosystems. His synthesis activities have focused on community responses to anthropogenic stressors and global change drivers across ecosystems.


John Wesley Powell Center
Phone: 970-226-9103

Jill Baron, Ph.D.

Research Ecologist Senior Scientist (ST)
Fort Collins Science Center
Phone: 970-491-1968