B31D:
Soil Carbon Change and Persistence in the Anthropocene I


Submit an Abstract to this Session


Session ID#: 59898

Session Description:
Soils are essential components of the Critical Zone, that respond to and drive critical environmental changes facing the earth during the Anthropocene. Soil organic matter dynamics play a major role in determining ecosystem C storage and regulating atmospheric CO2 concentrations. How will climate change and man’s alteration of the terrestrial landscape affect soil organic matter dynamics? A better understanding of the processes which drive C cycling in soils, and the timescales at which they operate, is critical to understanding soil C feedbacks to climate change. For example, the frequency and magnitude of precipitation is a critical control of carbon cycling in dryland soils. This session will focus on empirical and modeling studies of soils and carbon: storage potential, ages and transit times of C in soils, mechanisms of stabilization/ destabilization, and ecosystem vulnerability. We welcome studies using a range of methods at different scales, from radiocarbon measurements to global modeling.
Primary Convener:  Kate Lajtha, Oregon State University, Corvallis, OR, United States
Conveners:  Nancy Cavallaro, USDA/NIFA, Washington, DC, United States and Avni Malhotra, Pacific Northwest National Laboratory, Richland, United States
Primary Liaison:  J. Robert Logan V, Michigan State University, Kellogg Biological Station, East Lansing, MI, United States
Chairs:  Nancy Cavallaro, USDA/NIFA, Washington, DC, United States and J. Robert Logan V, Michigan State University, Kellogg Biological Station, East Lansing, MI, United States
OSPA Liaison:  Nancy Cavallaro, USDA/NIFA, Washington, DC, United States

Cross-Listed:
  • GC - Global Environmental Change
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0428 Carbon cycling [BIOGEOSCIENCES]
0486 Soils/pedology [BIOGEOSCIENCES]
1630 Impacts of global change [GLOBAL CHANGE]

Abstracts Submitted to this Session:

The Dryland Litter Cycle: Moving Litter Decomposition Beyond Spatial Stasis (Invited) (387567)
Heather Throop, Arizona State University, Tempe, United States and Jayne Belnap, USGS, Moab, UT, United States
Precipitation-Pulse Regimes Determine Functioning of Dryland Ecosystems (417324)
Osvaldo Sala1, Sasha Reed2, Scott L Collins3, Laureano Gherardi1, Kevin Wilcox4 and Alan Knapp5, (1)Arizona State University, School of Life Sciences, Tempe, AZ, United States, (2)U.S. Geological Survey, Southwest Biological Science Center, Moab, United States, (3)Department of Biology, MSC03-2020, University of New Mexico, Albuquerque, United States, (4)University of Oklahoma, Department of Microbiology and Plant Biology, Norman, OK, United States, (5)Colorado State University, Department of Biology and Graduate Degree Program in Ecology, Fort Collins, United States
THE PULSE-RESERVE PARADIGM OF ARIDLAND FUNCTION FROM THE MICROBIAL PERSPECTIVE (455491)
Ferran Garcia-Pichel, Arizona State University, School of Life Sciences, Tempe, AZ, United States
The pulse-reserve paradigm and explaining dryland function: past, present, and future (448489)
Sasha Reed, U.S. Geological Survey, Southwest Biological Science Center Moab, Moab, United States, Scott Ferrenberg, Southwest Biological Science Center Moab, Moab, UT, United States, Scott L Collins, Department of Biology, MSC03-2020, University of New Mexico, Albuquerque, United States and Osvaldo Sala, Arizona State University, School of Life Sciences, Tempe, AZ, United States
Biocrust CO2 cycle in a cool desert ecosystem: pulsed loss in the hot season, sustained uptake through the cool wet season. (468884)
Colin Tucker, Southwest Biological Science Center Moab, Moab, United States, Armin Howell, U.S. Geological Survey, Moab, UT, United States, Richard A Gill, Brigham Young University, Provo, UT, United States and Sasha Reed, U.S. Geological Survey, Southwest Biological Science Center, Moab, United States
Minimal destabilization of microbial necromass through a soil profile with wetting and drying (446073)
Courtney Creamer1, Christopher H Conaway2, Andrea L Foster3, Corey R Lawrence4, Jack W Mcfarland5, Marjorie S Schulz2 and Mark P Waldrop1, (1)U.S. Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Menlo Park, United States, (2)US Geological Survey, Water Mission Area, Earth System Processes Division, Menlo Park, CA, United States, (3)United States Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Menlo Park, United States, (4)US Geological Survey, Geosciences and Environmental Change Science Center, Denver, United States, (5)US Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Moffett FIeld, United States
Modeling the impacts of anthropogenic soil erosion on the soil organic carbon storage of the Rhine catchment (389208)
Victoria Naipal1, Philippe Ciais2, Yilong Wang1, Ronny Lauerwald3, Bertrand Guenet4 and Kristof Van Oost5, (1)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France, (2)LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette, France, (3)Université Libre de Bruxelles, Department of Geoscience, Environment and Society, Brussels, Belgium, (4)Ecole Normale Supérieure Paris, Paris, France, (5)Université Catholique de Louvain, Earth and Life Institute, Louvain-la-Neuve, Belgium
Getting to the root of soil carbon sequestration: tracking fine root carbon losses and soil carbon gains (466657)
Anthony Minerovic, Kent State University Kent Campus, Kent, OH, United States, Oscar Valverde-Barrantes, Florida International University, Miami, United States and Christopher B Blackwood, Kent State University, Biological Sciences, Kent, OH, United States

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