2018 Larson-Allmaras Lecture

Manure Happens:

Unintended consequences of nourishing over seven billion human omnivores 

May 4th, 2018  |  2:00 pm  |  335 Borlaug Hall, St. Paul Campus

Picture of Dr. Eric DavidsonEric A. Davidson

Professor and Director, Applalachian Laboratory, University of Maryland Center for Environmental Science 

Humans have profoundly altered the global nitrogen cycle in an effort to feed over 7 billion people. Humanity has disrupted the nitogen cycle even more than the carbon cycle, leading to widespread effects on ecosystems, biodiversity, human health, and climate. There have been important successes in reducing nitrogen emissions to the atmosphere by industrial and transportation sectors, and this has improved air quality. Effective solutions for reducing nitrogen losses from agriculture to groundwater and surface waters have also been identified, although considerable political, social, and economic impediments to their adoption remain. At the same time, demand for food is growing. One effort to integrate and frame socioeconomic and ecological challenges is the Sustainable Agricultural Matrix, which is a collection of quantifiable indicators from environmental, social, and economic dimensions, selected according to criteria of sustainability, data availability, data quality, and the potential to evaluate trade-offs at national scales.

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