HR: 17:05h
AN: B34A-04    [Abstracts]
TI: Ecohydrology underground: how root attributes influence water, carbon, and nutrient cycling
AU: * Jackson, R B
EM: jackson@duke.edu
AF: Department of Biology, Nicholas School of the Environment and Earth Sciences, and Center on Global Change, Duke University, Box 90338, Durham, NC 27708, United States
AU: McElrone, A J
EM: ajmcelrone@ucdavis.edu
AF: USDA-ARS Crops Pathology/Genetics Research Unit, One Shields Avenue, UC Davis, Davis, CA 95616, United States
AU: Bleby, T M
EM: timbleby@duke.edu
AF: Department of Biology, Nicholas School of the Environment and Earth Sciences, and Center on Global Change, Duke University, Box 90338, Durham, NC 27708, United States
AU: Piñeiro, G
EM: pineiro@ifeva.edu.ar
AF: Department of Biology, Nicholas School of the Environment and Earth Sciences, and Center on Global Change, Duke University, Box 90338, Durham, NC 27708, United States
AU: Piñeiro, G
EM: pineiro@ifeva.edu.ar
AF: Cátedra de Ecología, Facultad de Agronomía, Universidad de Buenos Aires , Av. San Martín 4453, Buenos Aires, Argentina
AU: Jobbágy, E G
EM: jobbagy@unsl.edu.ar
AF: Department of Biology, Nicholas School of the Environment and Earth Sciences, and Center on Global Change, Duke University, Box 90338, Durham, NC 27708, United States
AU: Jobbágy, E G
EM: jobbagy@unsl.edu.ar
AF: Grupo de Estudios Ambientales–Instituto de Matematica Aplicada de San Luis (IMASL), Universidad Nacional de San Luis and Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Av. Ejército de los Andes 950, San Luis, Argentina
AB: Through the depth and volume of the soil that they explore, plants strongly influence the cycling of water, carbon, and nutrients. This talk combines data from two experimental systems in North and South America to demonstrate such interactions. One is a gradient of sites in the southwestern U.S. where we are examining the ecohydrology associated with woody plant encroachment, including a unique cave system that allows us to measure water uptake by plants meters, even tens of meters, underground. Another is a network of plantations that provides sites with contrasting water, carbon, and nutrient use that we compare to adjacent native vegetation, particularly grasslands. We combine field results from these systems with remote sensing observations and model simulations to examine similar ecohydrological/nutrient interactions in other regions of the world.
DE: 0428 Carbon cycling (4806)
DE: 0470 Nutrients and nutrient cycling (4845, 4850)
DE: 0476 Plant ecology (1851)
DE: 0486 Soils/pedology (1865)
DE: 1813 Eco-hydrology
SC: Biogeosciences [B]
MN: 2007 Joint Assembly