OOS 13 - Microbial Ecology At the Terrestrial-Aquatic Interface

Tuesday, August 9, 2016: 1:30 PM-5:00 PM
Grand Floridian Blrm F, Ft Lauderdale Convention Center
Theodore M. Flynn, Argonne National Laboratory
Christopher W. Marshall, Argonne National Laboratory; and Pamela Weisenhorn, Argonne National Laboratory
Theodore M. Flynn, Argonne National Laboratory
Microorganisms are found in nearly every environment on Earth, and despite their small size they comprise most of the Earth’s biomass and support the majority of global physical and biogeochemical transformations. In particular, microbes that live at the interface between terrestrial and aquatic environments catalyze key steps in the global biogeochemical cycles that determine the release or sequestration of greenhouse gases, the production or depletion of nutrients, and the fate and transport of anthropogenic contaminants. Theoretical and computational models of these dynamic processes still lack robust quantification, however, due to the sheer complexity of microbial diversity and the physical and biogeochemical heterogeneity that define this environmental interface. As a result, it is rare to find microbially mediated reactions explicitly included in higher-level process models. Periodically flooded environments are among the most critical and least-understood terrestrial-aquatic interfaces. Rapid shifts between oxic and anoxic conditions in these zones have significant impacts on the flux of important greenhouse gases such as nitrous oxide, carbon dioxide, and methane, due in part to shifts in microbial activity brought about by changing redox conditions. Existing predictive models for greenhouse gas emissions in these environments have large error ranges due to substantial parameter and structural uncertainty. This highlights the need for microbial and geochemical studies in these areas, especially those that take into consideration the underlying microbial ecology, genomics, and metabolic dynamics. Meeting the challenge of a warming planet requires a multifaceted scientific approach. We have organized this session to bring together thought leaders in environmental biogeochemistry, microbial genomics and ecology, metabolic modeling, ecosystem modeling, and systems biology, whose research areas span large-scale field experiments, detailed laboratory measurements, and the creation of ecologically-informed biogeochemical models. In doing so, we hope to both showcase the exciting work being done across this burgeoning field and highlight existing knowledge gaps to foster future collaborations.
1:30 PM
 Soil microbial responses to soil drying and wetting are primary controllers of CO2 pulses in arid and semi-arid soils
Mary K. Firestone, University of California, Berkeley; Steven Blazewicz, Lawrence Livermore National Lab; Romain Barnard, INRA; Sarah Placella, University of California; Egbert Schwartz, Northern Arizona University; Catherine Osborne, unaffiliated; Eoin Brodie, Lawrence Berkieley National Laboratory
1:50 PM
 Investigating the effects of soil texture on organic matter processing and soil microbial ecology in natural and restored tidal freshwater wetlands
Christine Maietta, University of Maryland; Andrew H. Baldwin, University of Maryland; Stephanie A. Yarwood, University of Maryland
2:10 PM
 Coupled spatiotemporal dynamics of microbiomes, metabolites, and hydrologic mixing
James C. Stegen, Pacific Northwest National Laboratory; Tim Johnson, Pacific Northwest National Laboratory; Jim Fredrickson, Pacific Northwest National Laboratory; Michael J Wilkins, The Ohio State University; Allan Konopka, Pacific Northwest National Laboratory; Bill Nelson, Pacific Northwest National Laboratory; Evan Arntzen, Pacific Northwest National Laboratory; Will Chrisler, Pacific Northwest National Laboratory; Rosalie Chu, Environmental Molecular Sciences Laboratory; Sarah Fansler, Pacific Northwest National Laboratory; David Kennedy, Pacific Northwest National Laboratory; Tom Resch, Pacific Northwest National Laboratory; Malak M. Tfaily, Pacific Northwest National Laboratory
2:30 PM
 Effect of soluble electron shuttles on methane production and microbial community dynamics in wetland sediments
Edward J. O'Loughlin, Argonne National Laboratory; Margaret F. Sladek, Argonne National Laboratory; Dionysios A. Antonopoulos, Argonne National Laboratory; Theodore M. Flynn, Argonne National Laboratory; Jason C. Koval, Argonne National Laboratory; Christopher W. Marshall, Argonne National Laboratory; Kenneth M. Kemner, Argonne National Laboratory
3:10 PM
3:20 PM
 Identifying factors controlling methane emissions across freshwater wetland gradients
Kelly Wrighton, The Ohio State University; Garrett J Smith, The Ohio State University; Jordan C Angle, The Ohio State University; Adrienne B Narrowe, University of Colorado Denver; Mikayla A Borton, The Ohio State University; Michael D Johnston, The Ohio State University; Kay C. Stefanik, The Ohio State University; Rebecca A. Daly, The Ohio State University; Michael J Wilkins, The Ohio State University; David Hoyt, Pacific Northwest National Laboratory; Paula J Mouser, The Ohio State University; Ljiljana Pasa-Tolic, Pacific Northwest National Laboratory; Malak M. Tfaily, Pacific Northwest National Laboratory; Chris S Miller, University of Colorado Denver
3:40 PM
 Linking microbial ecology and soil biogeochemistry in tidal freshwater wetlands experiencing climate change
Rima B. Franklin, Virginia Commonwealth University; Ember M. Morrissey, West Virginia University; Scott C. Neubauer, Virginia Commonwealth University
4:00 PM
 Desert stream geochemistry and surface-subsurface interaction affects microbial diversity: Implications for microbial biogeography and function
Lydia H. Zeglin, Kansas State University; Clifford N. Dahm, University of New Mexico; Chelsea L. Crenshaw, University of New Mexico; Rich W. Sheibley, US Geological Survey; Cristina D. Vesbach, University of New Mexico
4:20 PM
 Terrestrial origin of bacterioplankton communities in complex boreal freshwater networks
Clara Ruiz-González, University of Quebec at Montreal; Juan Pablo Niño-García, University of Quebec at Montreal; Paul A. del Giorgio, University of Quebec at Montreal
4:40 PM
 The roles of rare taxa for microbial community dynamics across interfaces
Ashley Shade, Michigan State University; Jackson Sorensen, Michigan State University