96th ESA Annual Meeting (August 7 -- 12, 2011)

Controls over aboveground forest carbon density on Barro Colorado Island, Panama
Joseph Mascaro, Carnegie Institution for Science; Gregory P. Asner, Carnegie Institution for Science; Helene C. Muller-Landau, Smithsonian Tropical Research Institute; Michiel van Breugel, Smithsonian Tropical Research Institution; Jefferson Hall, Smithsonian Tropical Research Institute; Kyla M. Dahlin, National Center for Atmospheric Research

Landscape and hillslope controls over soil biogeochemical properties in a northern hardwood forest
Jennifer L. Morse, Portland State University; Peter M. Groffman, Cary Institute of Ecosystem Studies; Scott W. Bailey, USFS

Soil organic nitrogen speciation during 4000-year of soil and ecosystem development: Nitrogen K-edge XANES spectroscopy study
Kang Xia, Mississippi State University; Mark A. Williams, Virginia Tech University

The effect of landscape and cropping system on greenhouse gas emissions in an agro-ecosystem
Ryan J. Williams, Iowa State University; Sarah K. Hargreaves, Iowa State University; Thomas M. Isenhart, Iowa State University; Lisa A. Schulte, Iowa State University; Kirsten S. Hofmockel, Pacific Northwest National Laboratory

The effects of pH on carbon mineralization to CO₂ and CH₄ in peatlands across an ombrotrophic-minerotrophic gradient
Nathanael M. Eisenhut, University of Oregon; Rongzhong Ye, University of California, Davis; Brendan J. M. Bohannan, University of Oregon; Qusheng Jin, University of Oregon; Scott D. Bridgham, University of Oregon

Utilization of watershed scale soil moisture and C/N dynamics: Possibilities for quantifying nitrogen cycling “hotspots”
Peter Baas, University of Georgia; Jacqueline Mohan, University of Georgia; Daniel Markewitz, The University of Georgia; Jennifer D. Knoepp, USDA Forest Service Southern Research Station

Biomass and forest structure across topographic position in a Costa Rican secondary tropical dry forest
Justin M. Becknell, Carleton College; Jennifer S. Powers, University of Minnesota

Differences in soil aggregation and particulate organic matter pools across landscape positions in an agroecosystem
Todd A. Ontl, Iowa State University; Cynthia A. Cambardella, USDA-Agricultural Research Service; Lisa A. Schulte, Iowa State University; Randall K. Kolka, USDA Forest Service

Nutrient availability and soil processes along topographical gradients in a restored prairie
Laurel M. Lynch, St. Olaf College; Ellen E. Daugherty, St. Olaf College; Samuel T. Dunn, St. Olaf College; Katherine M. Halvorson, St. Olaf College; Karl E. Lapo, St. Olaf College; Kateri R. Salk, St. Olaf College; Stephanie N. Schmidt, St. Olaf College; John D. Schade, National Science Foundation

Isotopic evidence for shifts in N cycling across rain/snow transitions in the Sierra Nevada
Sara K. Enders, University of California, Davis; Benjamin Z. Houlton, University of California, Davis

Spatial heterogeneity of biogeochemistry and respiration in exposed and subnivian soils in McMurdo Dry Valleys, Antarctica
Loren Sackett, University of Colorado; Kallin Tea, University of Colorado; Susan R. Whitehead, University of Colorado at Boulder; Ian Schwartz, Casey Middle School; Diane M. McKnight, University of Colorado; Diana H. Wall, Colorado State University; Ross A. Virginia, Dartmouth College

Anthropogenic water drawdown and carbon accumulation mediates by soil aggregates in ecotones (Morichales) of the Orinoco lowland
Carlos L. Méndez, Instituto Venezolano de Investigaciones Cientificas; Meimalin C. Moreno, Instituto Venezolano de Investigaciones Cientificas; José J. San José, Instituto Venezolano de Investigaciones Cientificas; Rubén A. Montes Sr., Universidad Simón Bolívar; Jose V. Montoya, Instituto Venezolano de Investigaciones Cientificas; Jorge Paolini, Instituto Venezolano de Investigaciones Cientificas

PS 68 - Biogeochemistry: Biogeo Patterns Along Environmental Gradients