HR: 09:10h
AN: B51A-05 INVITED     [PDF]
TI: Interactions Among Water, Carbon, And Nutrient Cycles With Woody Plant Encroachment Into Grasslands
AU: * Jackson, R B
EM: jackson@duke.edu
AF: Duke University, Department of Biology, Durham, NC 27708-0340 United States
AU: Engel, V
EM: vicengel@duke.edu
AF: Duke University, Department of Biology, Durham, NC 27708-0340 United States
AU: Jobbagy, E G
EM: egj@duke.edu
AF: Duke University, Department of Biology, Durham, NC 27708-0340 United States
AU: McElrone, A J
EM: mcelrone@duke.edu
AF: Duke University, Department of Biology, Durham, NC 27708-0340 United States
AU: Pockman, W T
EM: pockman@unm.edu
AF: University of New Mexico, Department of Biology, Albuquerque, NM 87131 United States
AB: The expansion of woody plants into deserts, grasslands, and savannas alters water and nutrient cycling, affecting some one-fifth of the world's population. In this talk, research along precipitation gradients in North and South America will be used to examine interactions among water, carbon and nutrients in the southwestern U.S. and in grasslands of Argentina and Uruguay. Those interactions include groundwater uptake, carbon sequestration, changes in salinity and pH, and new evidence for the direct uptake of nutrients at depth using stable isotopes. The talk will end with a discussion of key unanswered research questions at the boundary of hydrology, biology, and geochemistry associated with woody plant encroachment.
UR: http://www.biology.duke.edu/jackson
DE: 0400 Biogeosciences
DE: 1600 GLOBAL CHANGE (New category)
DE: 1615 Biogeochemical processes (4805)
DE: 1655 Water cycles (1836)
DE: 1829 Groundwater hydrology
SC: Biogeosciences [B]
MN: 2003 Fall Meeting