Christopher Bernhardt

Christopher Bernhardt

Research Geologist

Phone: 703-648-6071
Fax: 703-648-6953

12201 Sunrise Valley Dr
Reston, VA 20192



Current Postion

♦  Research Geologist



♦  University of Pennsylvania, Ph.D. (2009)

♦  University of Akron, M.S. (2000)

♦  Baldwin Wallace College, B.S. (1998)




Bernhardt, C.E., Wingard, G.L., Willard, D.A., Marot, M.E., Landacre, B., and Holmes, C.W., 2013, Chronology from sediment cores collected in southwestern Everglades National Park, Florida: U.S. Geological Survey Open-File Report 2012‒1275, 59 p., (Available only online.)


Bernhardt, C.E., Horton, B.P., and Stanley, J.-D., 2012, Nile Delta vegetation response to Holocene climate variability, Geology 7: 615-618.


Bernhardt, C.E., 2011, Native Americans, regional drought, and tree island evolution in the Florida Everglades.  The Holocene, vol. 21, 967-978.


Bernhardt, C.E., Stanley, J-D., and Horton, B.P.,  2011, Wetland vegetation in Manzala Lagoon, Nile Delta coast, Egypt:  rapid responses of pollen to altered Nile hydrology and land use.  Journal of Coastal Research, vol. 27, 731-737.


Willard, D.A., and Bernhardt, C.E., 2011, Impacts of past climate and sea level change on Everglades wetlands: placing a century of anthropogenic change into a late-Holocene context. Climatic Change, vol. 107, 59-80.


Larsen, L , Aumen, N , Bernhardt, C., Engel, V., Givnish, T., Hagerthey, S., Harvey, J., Leonard, L., McCormick, P., McVoy, C., Noe, G., Nungesser, M., Rutchey, K., Sklar, F., Troxler, T., Volin, J.h , Willard, D., 2011. Recent and historic drivers of landscape change in the everglades ridge, Slough, and Tree Island Mosaic.  Critical Reviews in Environmental Science and Technology, vol. 21, Issue SUPPL. 1, p. 344-381.


Stanley, J-D., and Bernhardt, C.E.,  2010,  Alexandria’s Eastern Harbor, Egypt: pollen, microscopic charcoal, and the transition from natural to human-modified basin.  Journal of Coastal Research vol. 26: 67-79.  


Willard, D., Bernhardt, C., Brown, R., Landacre, B., and Townsend, P., 2010.  Pollen-based paleohydrologic reconstructions from late Holocene forested wetlands:  Lower Roanoke River Basin, North Carolina, United States.  The Holocene, vol. 21, 305-317.


Bernhardt, C.E. and Willard, D.A., 2009, Response of the Everglades sawgrass ridge and slough landscape to late Holocene climate variability and 20th century water-management practices.  Ecological Applications, vol. 19, 1723-1738.


Bernhardt, C.E, Mitchell, R. J., and Michaels, H. J., 2008, Effect of Lupinus perennis population size and local density on pollinator behavior.  International Journal of Plant Sciences vol.169, 944-953.


Culver, S.J., Farrell, K.M., Mallinson, D.J., Horton, B.P., Willard, D.A., Thieler, E.R., Riggs, S.R., Snyder, S.W., Wehmiller, J.F., Bernhardt, C.E., and Hillier, C., 2008, Micropaleontologic record of late Pliocene and Quaternary paleoenvironments in the northern Albemarle Embayment, North Carolina, U.S.A.  Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 264, 54-77.


Willard, D.A., Bernhardt, C.E., Brooks, G.R., Cronin, T., Edgar, T., and Larson, R., 2007, Deglacial climate variability in central Florida, USA.  Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 251, 366-382.


Willard, D.A, Bernhardt, C.E., Holmes, C.W., Landacre, B., and Marot, M., 2007, Response of Everglades tree islands to environmental change.  Ecological Monographs, vol. 76, 565-583.


Bernhardt, C.E. and Willard, D.A., 2006,  Marl prairie vegetation response to 20th century hydrologic change.  U.S. Geological Survey Open-file report 2006-1355.


Willard, D.A., Bernhardt, C.E., Korejwo, D.A., and Meyers, S.R., 2005, Eastern North American terrestrial ecosystem response to millennial-scale Holocene climate variability:  pollen-based climatic reconstruction.  Global and Planetary Change vol. 47, 17-35.


Willard, D.A., Bernhardt, C.E., Weimer, L., Cooper, S.R., Gamez, D., and Jensen, J., 2004, Atlas of pollen and spores of the Florida Everglades.  Palynology vol. 28, p. 175-227.


Bernhardt, C.E., Willard, D.A., Marot, M., and Holmes, C., 2004, Anthropologic and Natural Variation in the Ridge and Slough Pollen Assemblages. U.S. Geological Survey Open-File Report 2004-1448.


Willard, D.A. and Bernhardt, C.E., 2004, Pollen stratigraphy and land-use change, Pocomoke Sound. In Cronin, TM., ed., Pocomoke Sound Sedimentary and Ecosystem History.  U.S. Geological Survey Open-File Report OFR-2004-1350, Chapter 7.


Willard, D.A., Cronin, T.M., Bernhardt, C.E., and Damon, J., 2004, Sediment transport in Pocomoke Sound, Maryland inferred from microfossils in surface sediments. In Cronin, TM., ed., Pocomoke Sound Sedimentary and Ecosystem History.  U.S. Geological Survey Open-File Report OFR-2004-1350, Chapter 3.


Wingard, G.L., Cronin, T.M., Holmes, C.W., Willard, D.A., Dwyer, G., Ishman, S.E., Orem, W., Williams, C.P., Albietz, J., Bernhardt, C.E., Budet, C.A., Landacre, B., Lerch, T., Marot, M., and Ortiz, R.E., 2004, Ecosystem history of southern and central Biscayne Bay:  summary report on sediment core analyses – year two.  U.S. Geological Survey Open-File Report 2004-1312.