B51L:
The Fate of Carbon in Plants and Terrestrial Ecosystems: From Respiration to Allocation I

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Session ID#: 15296

Session Description:
Carbon assimilated by plants in photosynthesis can be respired in the plants leaves, stems or roots, or by heterotrophic respiration in the soil. This respired carbon is usually lost from the ecosystem, while the remaining carbon can be allocated to growth, to roots exhudates, or to non-structural carbon reserves.

The fate of carbon assimilated by plants determines the rates of carbon sequestration, and strongly affects the plants and ecosystem resilience to environmental stress. However, we still lack a comprehensive understanding of:

1)      What drives the rate of plant and soil respiration?

2)      Is all respired carbon lost from the ecosystem, or is some of it recycled within it?

3)       What determines the allocation of nonstructural carbon to growth, metabolism and storage?

4)       How do respiration and allocation patterns change under changing environmental conditions and what are the consequences for biogeochemical cycles?

Contributions from observational, experimental and modelling studies, are invited.

Primary Convener:  Alon Angert, Hebrew University of Jerusalem, Jerusalem, Israel
Conveners:  Susan Trumbore, Max Planck Institute for Biogeochemistry, Jena, Germany, Andrew D Richardson, School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA, Cambridge, United States and Mariah Suzanne Carbone, Earth Systems Research Center, Durham, NH, United States
Chairs:  Andrew D Richardson, School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA, Cambridge, United States and Henrik Hartmann, Max Planck Institute for Biogeochemistry, Jena, Germany
OSPA Liaison:  Susan Trumbore, Max Planck Institute for Biogeochemistry, Jena, Germany
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0426 Biosphere/atmosphere interactions [BIOGEOSCIENCES]
0428 Carbon cycling [BIOGEOSCIENCES]
0476 Plant ecology [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

Interactive Effects of Experimental Warming and Elevated CO2 on Belowground Allocation and Soil Organic Matter Decomposition at the Prairie Heating and CO2 Enrichment Experiment (Invited) (153408)
Elise Pendall1,2, Dana M Blumenthal3, Yolima Carrillo4, Feike A Dijkstra5, Kevin E Mueller3, Laura Nelson6, Ming Nie6,7, Kiona Ogle8, Edmund Ryan9, Kimberly E Samuels-Crow10, David G Williams6 and Tamara Jane Zelikova6, (1)Western Sydney University, Hawkesbury Institute for the Environment, Penrith, NSW, Australia, (2)Western Sydney University, Hawkesbury Institute for the Environment, Penrith 2751, NSW, Australia, (3)United States Department of Agriculture, Agricultural Research Service, Rangeland Resources Research Unit, CO, United States, (4)University of Western Sydney, Penrith, NSW, Australia, (5)University of Sydney, Sydney, Australia, (6)Univ Wyoming, Laramie, WY, United States, (7)Fudan University, Shanghai, China, (8)Northern Arizona University, School of Informatics, Computing, and Cyber Systems, Flagstaff, United States, (9)Lancaster University, Lancaster, United Kingdom, (10)Northern Arizona University, School of Informatics, Computing, and Cyber Systems, Flagstaff, AZ, United States
Carbon allocation in a network of tropical forest plots during a drought (160635)
Chris Doughty, Northern Arizona University, SICCS, Flagstaff, AZ, United States, Yadvinder Malhi, Oxford University, Environmental Change Institute, Oxford, United Kingdom, Sam Moore, University of Oxford, London, United Kingdom and Terhi Riutta, University of Oxford, Oxford, United Kingdom
Nonstructural carbohydrate remobilization and suckering of aspen roots following severe disturbance (Invited) (182563)
Erin Wiley1, Carolyn King1, Andrew D Richardson2 and Simon Landhäusser3, (1)University of Alberta, Edmonton, AB, Canada, (2)School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, AZ, USA; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA, Cambridge, United States, (3)University of Alberta, Department of Renewable Resources, Edmonton, AB, Canada
Can gas exchange dynamics predict non-structural carbohydrate use under drought stress? (121550)
Steven Kannenberg, Indiana University, Bloomington, IN, United States and Richard P Phillips, Indiana University, Department of Biology, Bloomington, IN, United States
Lessons Learned From Recent Research on Internal CO2 Transport in Trees. Part I, CO2 Efflux and Respiration (179424)
Jasper Bloemen1, Mary Anne McGuire2, Doug P Aubrey3, Kathy Steppe4 and Robert O Teskey2, (1)University of Innsbruck, Innsbruck, Austria, (2)University of Georgia, Athens, GA, United States, (3)University of Georgia, Savannah River Ecology Laboratory, Athens, GA, United States, (4)Ghent University, Department of Applied Ecology and Environmental Biology, Ghent, Belgium
Radial diffusion, vertical transport, and refixation of labeled bicarbonate in scots pine stems (174271)
John D Marshall, Swedish University of Agricultural Sciences, Department of Forest Ecology and Management, Umeå, Sweden, Lasse Tarvainen, SLU Swedish University of Agricultural Sciences Umeå, Dept. of Forest Ecology and Management, Umeå, Sweden and Göran Wallin, University of Gothenburg, Dept. of Biological and Environmental Sciences, Gothenburg, Sweden
Do Tree Stems Recapture Respired CO2? (118273)
Boaz Hilman, Max Planck Institute for Biogeochemistry, Jena, Germany and Alon Angert, Hebrew University of Jerusalem, Jerusalem, Israel
Measurement of gross photosynthesis, respiration in the light and mesophyll conductance in leaves using H218O labeling and high precision isotope ratio mass spectrometry (Invited) (186005)
Kevin Lee Griffin, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Paul PG Gauthier, Princeton University, Princeton, NJ, United States, Mark Owen Battle, Bowdoin College, Brunswick, ME, United States and Michael L Bender, Shanghai Jiao Tong University, School of Oceanography, Shanghai, China

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