INSTAAR: Robert Stallard

Fellow of INSTAAR; Research Hydrologist of US Geological Survey.

PhD, Massachusetts Institute of Technology - Woods Hole Oceanographic Institute, 1980.

INSTAAR Directorate Members

Specialty: Biogeochemistry, hydrology, and geomorphology.

Research Interests: The earth-surface environment and how it changes on human and geologic time scales. My emphasis is on climate and land-use changes and how these affect processes that control the composition and dispersal of dissolved and solid phases in rivers and trace gases in the atmosphere. My work combines both field and theoretical studies using the tools of geology, biology, biogeochemistry, and geography.

Current areas of investigation: (1) Can we develop general physically and biologically based models of the processes that generate the dissolved and particulate load in rivers and trace substances in the atmosphere? (2) How do various phases chemically partition during transport in rivers and estuaries? (3) What are the dispersal pathways of river-borne substances through rivers and estuaries into the coastal environment? (4) How do human activities, particularly land-use change, affect environments being examined? (5) How do we use rivers to integrate phenomena at local spatial scales up to continental scales? (6) Can we formulate provenance models to reconstruct past geologic environments?

Outstanding Awards: Meritorious Service Award for the Department of the Interior (2002) "In recognition of his exceptional contributions to the development of new and innovative research programs in the U.S. Geological Survey."

Selected Publications:

Ibáñez D., R., Condit, R., Angehr, G.R., Aguilar, S., García, T., Martínez, R., Sanjur, A., Stallard R.F., Wright S.J., Rand A.S., Heckadon Moreno S., 2002, An ecosystem report on the Panama Canal: Monitoring the status of the forest communities and the watershed: Environmental Monitoring and Assessment, v. 80, p. 65-95.
Condit, R., Robinson, W.D., Ibáñez D., R., Aguilar, S., Sanjur, A., Martínez, R., Stallard, R.F., García, T., Angehr, G.R., Petit, L., Wright, S.J., Robinson, T.R., and Heckadon M., S., 2001, The status of the Panama Canal Watershed and Its biodiversity at the beginning of the 21 st Century: Bioscience, v. 51, no. 5, p. 389-398.
Pacala, S.W., Hurtt, G.C., Baker, D., Peylin, P., Houghton, R.A., Birdsey, R.A., Heath, L., Sundquist, E.T., Stallard, R.F., Ciais, P., Moorcroft, P., Caspersen, J.P., Shevliakova, E., Moore, B., Kohlmaier, G., Holland, E., Gloor, M., Harmon, M.E., Fan, S.-M., Sarmiento, J.L., Goodale, C.L., Schimel, D., and Field C.B., 2001, Consistent land- and atmosphere-based U.S. carbon sink estimates: Science, v. 292, no. 5525, p. 2316-2320.
Stallard, R.F., 2001, Possible environmental factors underlying amphibian decline in eastern Puerto Rico: Analysis of government data archives: Conservation Biology, v. 15, no. 4, p. 1-16.
Stallard, R.F. 2000, Tectonic processes and erosion, in Jacobson, M.C., Charleson, R.J., Rodhe, H., and Orians, G.H., editors, Earth System Science: From Biogeochemical Cycles to Global Change: San Diego, California, Academic Press. p. 195-229.
Stallard, R. F., 1998, Terrestrial sedimentation and the carbon cycle: Coupling weathering and erosion to carbon burial: Global Biogeochemical Cycles, v. 12, no. 2, p. 231-252.
Brown, E. T., Stallard, R. F., Larsen, M. C., Bourlès, D. L., Raisbeck, G. M., and Yiou, F., 1998, Determination of predevelopment denudation rates of an agricultural watershed (Cayaguás River, Puerto Rico) using in situ -produced 10 Be in river-borne quartz: Earth and Planetary Sciences Letters, , v. 160, p. 723-728.
Axtmann, E. V., and Stallard, R. F., 1995, Chemical weathering in the South Cascade Glacier basin, comparison of subglacial and extra-glacial weathering, in Tonnessen, K. A., Williams, M. W., and Tranter, Martyn, eds., Biogeochemistry of Seasonally Snow-Covered Catchments: International Association of Hydrological Sciences Publication 228, p. 431-439.
Brown, E. T., Stallard, R. F., Larsen, M. C., Raisbeck, G. M., and Yiou, F., 1995, Denudation rates determined from the accumulation of in situ -produced 10 Be in the Luquillo Experimental Forest, Puerto Rico: Earth and Planetary Science Letters, v. 129, p. 193-202.
Stallard, R. F., 1995, Tectonic, environmental, and human aspects of weathering and erosion: A global review using a steady-state perspective: Annual Review of Earth and Planetary Sciences, v. 23, p. 11-39.
Stallard, R. F., 1995, Relating chemical and physical erosion: in White, A.F., and Brantley, S.L. eds. , Chemical Weathering Rates of Silicate Minerals: Reviews in Mineralogy, v. 31, p. 543-564.
Keller, M. and Stallard, R. F., 1994, Methane Emission by bubbling from Gatun Lake, Panama: Journal of Geophysical Research, v. 99, p. 8307-8318.

See Also:

Robert F. Stallard