Speaker: Elliott Campbell.
Local food systems may facilitate agroecological practices that conserve nutrient, energy, and water resources. However, little is known about the potential for local food systems to scale beyond niche markets and meet a substantial fraction of total food demand. Here we estimate the upper potential for all existing US croplands to meet total US food demand through local food networks. Our spatially explicit approach simulates the years 1850 through 2000 and accounts for a wide range of diets, food waste, population distributions, cropland areas, and crop yields. Although we find that local food potential has declined over time, particularly in some coastal cities, our results also demonstrate an unexpectedly large current potential for meeting as much as 90% of the national food demand. This decline in potential is associated with demographic and agronomic trends, resulting in extreme pressures on agroecological systems that, if left unchecked, could severely undermine recent national policies focused on food localization. Nevertheless, these results provide a spatially explicit foundation for exploring the many dimensions of agroecosystem sustainability.
Elliott Campbell’s research emphasizes the use of spatial analysis and environmental modeling to explore environmental policy, urban agroecology, and watershed sustainability. This work has appeared in media ranging from NPR’s “Morning Edition” to The Economist and has provided a basis for consultations to the U.S. EPA and other government agencies. He serves as Associate Editor to Frontiers in Ecology and the Environment and is the recipient of the NSF CAREER award. Dr. Campbell received his BS and MS from Stanford University and his PhD from the University of Iowa. He is currently an associate professor of Environmental Engineering at UC Merced.