Trade.Information

Details of Robert C. Graham

Professor of Soil Mineralogy

Office: 2416 Geology
Phone: (951) 827-3751
Email: graham@mail.ucr.edu

Academic Degrees:

• Ph.D., North Carolina State University, 1986
• M.S., Utah State University, 1982
• B.S., University of California, Davis, 1976

Specialization:

• Weathering, properties, and behavior of soil minerals
• Soil genesis
• Pedologic processes
• Ecosystem roles of soils and weathered bedrock
• Wildland soils
• San Dimas Experimental Forest

Courses Taught:

• SWSC/ENSC/GEO 138 - Soil Morphology & Classification
  • Spring 2005 field Trip
  • Spring 2004 field Trip
  • Spring 2003 field trip
  • Spring 2002 field trip
  • Spring 2000 field Trip
• SWSC 213 -Soil Mineralogy
• SWSC 226 - Soil Geomorphology
• SWSC 256 - Graduate Seminar in Soil Mineralogy and Soil Genesis

Selected Publications:

Weathered Bedrock: Genesis and Ecosystem Function

Frazier, C.S., and R.C. Graham. 2000. Pedogenic transformation of fractured granitic bedrock, southern California. Soil Sci. Soc. Am. J. 64:2057-2069.

Hubbert, K.R., R.C. Graham, and M.A. Anderson. 2001. Soil and weathered bedrock: Components of a Jeffrey pine plantation substrate. Soil Sci. Soc. Am. J. 65:1255-1262.

Hubbert, K.R., J.L. Beyers, and R.C. Graham. 2001. Roles of weathered bedrock and soil in seasonal water relations of Pinus Jeffreyi and Arctostaphylos patula. Can. J. Forest Res. 31:1947-1957.

Frazier, C.S., R.C. Graham, P.J. Shouse, M.V. Yates, and M.A. Anderson. 2002. A field study of water flow and virus transport in weathered granitic bedrock. Vadose Zone J. 1:113-124.

Rose, K.L., R.C. Graham, and D.R. Parker. 2003. Water source utilization by Pinus jeffreyi and Arctostaphylos patula on thin soils over bedrock. Oecologia 134: 46-54.

Egerton-Warburton, L.M., R.C. Graham, and K.R. Hubbert. 2003. Spatial variability in mycorrhizal hyphae and nutrient and water availability in a soil-weathered bedrock profile. Plant and Soil 249:331-342.

Bornyasz, M.A., R.C. Graham, and M.F. Allen. 2005. Ectomycorrhizae in a soil-weathered granitic bedrock regolith: Linking matrix resources to plants. Geoderma 126:141-160.

Fire Effects on Soils

Goforth, B.R., R.C. Graham, K.R. Hubbert, C.W. Zanner, R.A. Minnich. 2005. Spatial distribution and properties of ash and thermally altered soils after high-severity forest fire, southern California. Int. J. Wildland Fire 14:343-354.

Hubbert, K.R., H.K. Preisler, P.M. Wohlgemuth, R.C. Graham, and M.G. Narog. 2006. Prescribed burning effects on soil physical properties and soil water repellency in a steep chaparral watershed, southern California, USA. Geoderma 130:284-298.

de Koff, J.P., R.C. Graham, K.R. Hubbert, and P.M. Wohlgemuth. Pre- and post-fire erosion of soil nutrients within a chaparral watershed. Soil Sci. (in press).

Mineral Weathering

Hamer, M., R.C. Graham, C. Amrhein, and K.N. Bozhilov. 2003. Dissolution of ripidolite (Mg, Fe-chlorite) in organic and inorganic acid solutions. Soil Sci. Soc. Am. J. 67:654-661.

Lee, B.D., S.K. Sears, R.C. Graham, C. Amrhein, and H. Vali. 2003. Secondary mineral genesis from chlorite and serpentine in an ultramafic soil toposequence. Soil Sci. Soc. Am. J. 67:1309-1317.

Soil Geomorphology

Lee, B.D., R.C. Graham, T.E. Laurent, C. Amrhein, and R.M. Creasy. 2001. Spatial distributions of soil chemical conditions in a serpentinitic wetland and surrounding landscape. Soil Sci. Soc. Am. J. 65:1183-1196.

Wood, Y.A., R.C. Graham, and S.G. Wells. 2002. Surface mosaic map units: capturing the spatial variability of a desert pavement surface. J. Arid Env. 52: 305-317.

Kendrick, K.J., and R.C. Graham. 2004. Pedogenic silica accumulation in chronosequence soils, southern California. Soil Sci. Soc. Am. J. 68:1295-1303.

Wood, Y.A., R.C. Graham, and S.G. Wells. 2005. Surface control of desert pavement pedologic process and landscape function, Cima Volcanic Field, Mojave Desert, California. Catena 59:205-230.

Williamson, T.N., P. Gessler, and R.C. Graham. Links between pedogenesis and watershed terrain after chaparral to grass conversion. Soil Sci. Soc. Am. J. (in press).

Biotic Influence on Soil Genesis and Behavior

Johnson-Maynard, J.L., P.J. Shouse, R.C. Graham, P. Castiglione, and S.A. Quideau. 2004. Microclimate and pedogenic implications in a 50-year-old chaparral and pine biosequence. Soil Sci. Soc. Am. J. 68:876-884.

Williamson, T.N., R.C. Graham, and P.J. Shouse. 2004. Effects of a chaparral to grass conversion on soil physical and hydrologic properties after four decades. Geoderma 123:99-114.

Williamson, T.N., B.D. Newman, R. C. Graham, and P.J. Shouse. 2004. Regolith water in zero-order chaparral and perennial grass watersheds four decades after vegetation conversion. Vadose Zone J. 3:1007-1016.

Johnson-Maynard, J.L., R.C. Graham, P.J. Shouse, and S.A. Quideau. Base cation and silicon biogeochemistry under pine and scrub oak monocultures: Implications for weathering rates.Geoderma 126:353-365.

Quideau, S.A, R.C. Graham, S.-W. Oh, P.F. Hendrix, and R.E. Waylishen. 2005. Leaf litter decomposition in a chaparral ecosystem, southern California. Soil Biol. Biochem. 37:1988-1998.

Enloe, H.A., R.C. Graham, and S.C. Sillett. 2006. Arboreal Histosols in old-growth redwood forest canopies, northern California. Soil Sci. Soc. Am. 70:408-418.

Graduate Students:

• Daniel Hirmas -- Ph.D.
      Spatial and process-based modeling of inorganic carbon storage in the Mojave Desert, California.
• Hector Estrada Medina -- Ph.D.
      Water dynamics in the karst landscape of Yucatan. more...
• Annie Rossi -- M.S.
      Porosity formation as a function of weathering in granitic rocks.
• Judy Turk -- Ph.D.
      Rates of soil development and soil organic carbon accumulation at a forested debris flow chronosequence in southern California. more...

Former Graduate Students:

• April Ulery (Ph.D. 1991) -- Associate Professor of Soil Chemistry, New Mexico State University, Las Cruces.
• Deborah Reid (now Soukup) (Ph.D. 1992) -- Senior Soil Scientist, Geomatrix Consultants, Bakersfield, CA.
• Wendy Weitkamp (now Hawkins) (M.S. 1992) -- Life Science and Physical Science Teacher, Montclair College Prep, Van Nuys, CA.
• Lynn Moody (Ph.D. 1993) -- Associate Professor of Soil Science, Cal Poly State University, San Luis Obispo, CA.
• Grace Alba (M.S. 1994) -- Lecturer, University of Pittsburgh, Pittsburgh, PA.
• Scott Frazier (M.S. 1997) -- Soil Scientist, Jones and Stokes, Sacramento, CA.
• Ken Hubbert (Ph.D. 1999) -- Research Soil Scientist, Hubbert & Associates, Apple Valley, CA.
• Jodi Johnson-Maynard (Ph.D. 1999) -- Assistant Professor of Soil-Water Management, University of Idaho, Moscow.
• Brad Lee (Ph.D. 1999) -- Assistant Professor of Soils and Land Use, Purdue University, West Lafayette, IN.
• Tanja Williamson (Ph.D. 1999) -- Hydrologist, USGS Kentucky Water Science Center
• Carrie-Ann Haydu (now Houdeshell) (M.S. 2000) -- -- MLRA Soil Scientist, USDA Natural Resources Conservation Service, Victorville, CA.
• Yvonne Wood (Ph.D. 2000) -- UCCE County Director/Natural Resources Advisor, Inyo-Mono Counties.
• Jonathan Wald (M.S. 2001) -- -- Natural Resources Planner, Andersen Airforce Base, Guam.
• James Witty (M.S. 2001) -- Operations Manager, Synagro West, Inc., Suisin City, CA.
• Heather Allen (now Enloe) (M.S. 2003) - Research Technician, Dept. of Renewable Resources, University of Wyoming, Laramie, Wyoming.
• Margaret Bornyasz (M.S. 2003) -- Plant Ecologist/Soil Scientist, M.J. Klinefelter, GIS and Environmental Consulting, Temecula, CA.
• Kathy Rose (Ph.D. 2003) -- Environmental Scientist, Santa Ana Regional Water Quality Control Board, Riverside, CA.
• Jason de Koff (M.S. 2004) -- Ph.D. student, Purdue University, IN.
• Susan Akers (M.S. 2004) -- Soil Scientist, USDA Natural Resources Conservation Service, Wall, South Dakota.

Some Profiles of Former Graduate Students:

• Scott Frazier
• Lynn Moody
• April Ulery
• Jodi Johnson-Maynard
• Brad Lee
• Margaret Bornyasz

Address:

Department of Environmental Sciences
University of California, Riverside
Riverside, CA 92521-0424

Fax:  (951) 827-3993