COS 134
Biogeochemistry: Biogeo Patterns Along Environmental Gradients II

Friday, August 14, 2015: 8:00 AM-11:30 AM
302, Baltimore Convention Center
8:00 AM
COS 134-1
 Functional biogeography of root traits from deserts to tropical forests
Zeqing Ma, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences; Dali Guo, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences; Le Li, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences; Chengen Ma, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
8:20 AM
COS 134-2
 Soil fertility, microbial communities, and nitrogen dynamics along rainfall gradients
Peter M. Vitousek, Stanford University; Kabir G. Peay, Stanford University; Chris Francis, Stanford University; Karen Casciotti, Stanford University; Christian von Sperber, Stanford University; Oliver Chadwick, University of California
8:40 AM
COS 134-3
 Disturbance and topography regulate nitrogen availability and stable isotopes over long-term forest succession
Steven S. Perakis, US Geological Survey; Alan J. Tepley, University of Colorado; Jana E. Compton, US EPA, NHEERL, Western Ecology Division
9:00 AM Cancelled
COS 134-4
 Using long-term data to quantify seasonal and discharge variations in watershed nitrogen export across a land use gradient
Jonathan M. Duncan, University of North Carolina at Chapel Hill; Neil D. Bettez, Cary Institute of Ecosystem Studies; Peter M. Groffman, Cary Institute of Ecosystem Studies; Lawrence E. Band, University of North Carolina
9:20 AM
COS 134-5
 Precipitation driven patterns in soil biogeochemistry throughout the soil profile across 20kyr old basaltic soil profiles
Jesse Bloom Bateman, Stanford University; Oliver A. Chadwick, University of California; Peter M. Vitousek, Stanford University
9:40 AM
COS 134-
 Break
9:50 AM
COS 134-6
 Nutrient use efficiency and N:P stoichiometry are highly plastic in herbaceous N-fixing legumes
Amelia A. Wolf, Columbia University; Duncan N. L. Menge, Columbia University; Jennifer L. Funk, Chapman University
10:10 AM
COS 134-7
 Using isotopic tracers and ecological modeling to examine partitioning of atmospheric nitrogen deposition in subalpine ecosystems
Justin P. Poinsatte, Washington State University; Regina M. Rochefort, National Park Service; R. Dave Evans, Washington State University
10:30 AM
COS 134-8
 Geomorphology and canopy chemistry influence soil nitrogen availability on variable time scales in a lowland tropical forest
Brooke B. Osborne, Brown University; Megan K. Nasto, University of Montana; Gregory Asner, Carnegie Institution for Science; Cory C. Cleveland, University of Montana; Benjamin Sullivan, University of Nevada, Reno; Philip G. Taylor, Duke University; Alan R. Townsend, Duke University; Stephen Porder, Brown University
10:50 AM
COS 134-9
 A comparison of sediment, water column, and open-channel denitrification measured using membrane-inlet mass spectrometry in Midwestern rivers
Alexander J. Reisinger, University of Notre Dame; Jennifer L. Tank, University of Notre Dame; Timothy J. Hoellein, Loyola University; Robert O. Hall Jr., University of Wyoming
11:10 AM
COS 134-10
 Controls on free-living nitrogen fixation during decomposition of leaf litter across a soil-age gradient
Joy B. Winbourne, University of California, Davis; Benjamin Z. Houlton, University of California, Davis
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