OOS 24
Managing Belowground Processes In Agroecosystems

Thursday, August 8, 2013: 8:00 AM-11:30 AM
101B, Minneapolis Convention Center
Sarah K. Hargreaves
Lisa A. Schulte
Lisa A. Schulte
Understanding the processes that occur in soil is essential to the stewardship of our managed ecosystems; however, belowground processes and our ability to manage them are poorly understood in comparison to their aboveground counterparts. This organized oral session addresses this knowledge gap by exploring the question: how do we manage agroecosystems for belowground processes that support multiple ecosystem goods and services? By contrasting belowground processes of past, current, and alternative systems, we expect this session to help guide the science and management of agroecosystems for greater long-term sustainability. The session will start with a review of existing knowledge regarding our ability to manage belowground processes. The bulk of the session will focus on empirical research based on field experiments contrasting current and alternative agroecosystems. These talks will consider the response of roots and microbial communities to management and how these responses affect key outcomes, including decomposition and carbon storage. Plot-scale research will also focus on understanding larger-scale variability of these processes. The final speaker will discuss how site-specific data can be scaled up through the use of models, and used to assist ecologists and land managers predict the effect of management decisions on belowground processes.
8:20 AM
 Management impacts on soil carbon sequestration: A case study evaluating perennial and annual cereal production systems
Christine Sprunger, Michigan State University and Kellogg Biological Station; Sieglinde Snapp, Michigan State University; Steve Culman, University of California, Davis
8:40 AM
 Spatial variability of soil carbon storage and root production in conventional and perennial agroecosystems
Todd A. Ontl, Iowa State University; Cynthia A. Cambardella, USDA-Agricultural Research Service; Kirsten S. Hofmockel, Iowa State University; Lisa A. Schulte, Iowa State University; Randall K. Kolka, USDA Forest Service
9:00 AM
 Scale-dependent patterns of soil microbial abundance, diversity and function in an agricultural landscape
Sarah K. Hargreaves, Iowa State University; Alice E. Milne, Rothamsted Research; Kirsten S. Hofmockel, Iowa State University
9:20 AM
 Linking microbial community composition to management-relevant agroecosystem functions
David S. Duncan, University of Wisconsin-Madison; Kelsea A. Jewell, University of Wisconsin-Madison; David A. Williams, Great Lakes Bioenergy Research Center; Garret Suen, University of Wisconsin-Madison; Randall D. Jackson, University of Wisconsin-Madison
9:40 AM
9:50 AM
 Managing for fungi in agroecosystems: What we know and where we will go
Laurel A. Kluber, USDA ARS Coastal Plains Soil, Water, and Plant Research Center; Joshua R. Herr, Penn State University
10:30 AM
 Bottom-up effects of conventional and organic soil fertility management on Ostrinia nubilalis development and resistance of corn plants to herbivory
Ebony Murrell, University of Wisconsin-Madison; Eileen M. Cullen, University of Wisconsin-Madison
10:50 AM
 Consequences of agricultural management intensity for litter-inhabiting arthropods and their role in decomposition
Kyle Wickings, University of New Hampshire; A. Stuart Grandy, University of New Hampshire
11:10 AM
 Representing belowground processes in land surface models: Applications at the regional scale and remaining challenges
Tracy E. Twine, University of Minnesota; Jian Sun, University of Minnesota; Andy VanLoocke, University of Illinois; Carl J. Bernacchi, University of Illinois/USDA-ARS; Christopher J. Kucharik, University of Wisconsin-Madison