Christopher Bernhardt, Ph.D.
Chris Bernhardt is the Center Director of the USGS Florence Bascom Geoscience Center.
Education and Certifications
University of Pennsylvania, Ph.D. (2009)
University of Akron, M.S. (2000)
Baldwin Wallace College, B.S. (1998)
Science and Products
Filter Total Items: 31
Coastal and wetland ecosystems of the Chesapeake Bay watershed: Applying palynology to understand impacts of changing climate, sea level, and land use Coastal and wetland ecosystems of the Chesapeake Bay watershed: Applying palynology to understand impacts of changing climate, sea level, and land use
The mid-Atlantic region and Chesapeake Bay watershed have been influenced by fluctuations in climate and sea level since the Cretaceous, and human alteration of the landscape began ~12,000 years ago, with greatest impacts since colonial times. Efforts to devise sustainable management strategies that maximize ecosystem services are integrating data from a range of scientific disciplines...
Authors
Debra A. Willard, Christopher E. Bernhardt, Cliff R. Hupp, Wayne L. Newell
Pollen and spores of terrestrial plants Pollen and spores of terrestrial plants
Pollen and spores are valuable tools in reconstructing past sea level and climate because of their ubiquity, abundance, and durability as well as their reciprocity with source vegetation to environmental change (Cronin, 1999; Traverse, 2007; Willard and Bernhardt, 2011). Pollan is found in many sedimentary environments, from freshwater to saltwater, terrestrial to marine. It can be...
Authors
Christopher E. Bernhardt, Debra A. Willard
Late Holocene sea- and land-level change on the U.S. southeastern Atlantic Coast Late Holocene sea- and land-level change on the U.S. southeastern Atlantic Coast
Late Holocene relative sea-level (RSL) reconstructions can be used to estimate rates of land-level (subsidence or uplift) change and therefore to modify global sea-level projections for regional conditions. These reconstructions also provide the long-term benchmark against which modern trends are compared and an opportunity to understand the response of sea level to past climate...
Authors
Andrew C. Kemp, Christopher E. Bernhardt, Benjamin P. Horton, Robert E. Kopp, Christopher H. Vane, W. Richard Peltier, Andrea D. Hawkes, Jeffrey P. Donnelly, Andrew C. Parnell, Niamh Cahill
Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades
Tropical and subtropical peatlands are considered a significant carbon sink. The Florida Everglades includes 6000-km2 of peat-accumulating wetland; however, detailed carbon dynamics from different environments within the Everglades have not been extensively studied or compared. Here we present carbon accumulation rates from 13 cores and 4 different environments, including sawgrass ridges...
Authors
Miriam C. Jones, Christopher E. Bernhardt, Debra A. Willard
Sea-level change during the last 2500 years in New Jersey, USA Sea-level change during the last 2500 years in New Jersey, USA
Relative sea-level changes during the last ∼2500 years in New Jersey, USA were reconstructed to test if late Holocene sea level was stable or included persistent and distinctive phases of variability. Foraminifera and bulk-sediment δ13C values were combined to reconstruct paleomarsh elevation with decimeter precision from sequences of salt-marsh sediment at two sites using a multi-proxy...
Authors
Andrew C. Kemp, Benjamin P. Horton, Christopher H. Vane, Christopher E. Bernhardt, D. Reide Corbett, Simon E. Engelhart, Shimon C. Anisfeld, Andrew C. Parnell, Niamh Cahill
Reconstructing vegetation response to altered hydrology and its use for restoration, Arthur R. Marshall Loxahatchee National Wildlife Refuge, Florida Reconstructing vegetation response to altered hydrology and its use for restoration, Arthur R. Marshall Loxahatchee National Wildlife Refuge, Florida
We present reconstructed hydrologic and vegetation trends of the last three centuries across the Arthur R. Marshall Loxahatchee National Wildlife Refuge, Florida in order to understand the effects of 20th century water management. We analyzed pollen assemblages from cores at marsh sites along three transects to document vegetation and infer hydroperiod and water depth both before and...
Authors
Christopher E. Bernhardt, Laura A. Brandt, Bryan D. Landacre, Marci E. Marot, Debra A. Willard
Science and Products
Filter Total Items: 31
Coastal and wetland ecosystems of the Chesapeake Bay watershed: Applying palynology to understand impacts of changing climate, sea level, and land use Coastal and wetland ecosystems of the Chesapeake Bay watershed: Applying palynology to understand impacts of changing climate, sea level, and land use
The mid-Atlantic region and Chesapeake Bay watershed have been influenced by fluctuations in climate and sea level since the Cretaceous, and human alteration of the landscape began ~12,000 years ago, with greatest impacts since colonial times. Efforts to devise sustainable management strategies that maximize ecosystem services are integrating data from a range of scientific disciplines...
Authors
Debra A. Willard, Christopher E. Bernhardt, Cliff R. Hupp, Wayne L. Newell
Pollen and spores of terrestrial plants Pollen and spores of terrestrial plants
Pollen and spores are valuable tools in reconstructing past sea level and climate because of their ubiquity, abundance, and durability as well as their reciprocity with source vegetation to environmental change (Cronin, 1999; Traverse, 2007; Willard and Bernhardt, 2011). Pollan is found in many sedimentary environments, from freshwater to saltwater, terrestrial to marine. It can be...
Authors
Christopher E. Bernhardt, Debra A. Willard
Late Holocene sea- and land-level change on the U.S. southeastern Atlantic Coast Late Holocene sea- and land-level change on the U.S. southeastern Atlantic Coast
Late Holocene relative sea-level (RSL) reconstructions can be used to estimate rates of land-level (subsidence or uplift) change and therefore to modify global sea-level projections for regional conditions. These reconstructions also provide the long-term benchmark against which modern trends are compared and an opportunity to understand the response of sea level to past climate...
Authors
Andrew C. Kemp, Christopher E. Bernhardt, Benjamin P. Horton, Robert E. Kopp, Christopher H. Vane, W. Richard Peltier, Andrea D. Hawkes, Jeffrey P. Donnelly, Andrew C. Parnell, Niamh Cahill
Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades
Tropical and subtropical peatlands are considered a significant carbon sink. The Florida Everglades includes 6000-km2 of peat-accumulating wetland; however, detailed carbon dynamics from different environments within the Everglades have not been extensively studied or compared. Here we present carbon accumulation rates from 13 cores and 4 different environments, including sawgrass ridges...
Authors
Miriam C. Jones, Christopher E. Bernhardt, Debra A. Willard
Sea-level change during the last 2500 years in New Jersey, USA Sea-level change during the last 2500 years in New Jersey, USA
Relative sea-level changes during the last ∼2500 years in New Jersey, USA were reconstructed to test if late Holocene sea level was stable or included persistent and distinctive phases of variability. Foraminifera and bulk-sediment δ13C values were combined to reconstruct paleomarsh elevation with decimeter precision from sequences of salt-marsh sediment at two sites using a multi-proxy...
Authors
Andrew C. Kemp, Benjamin P. Horton, Christopher H. Vane, Christopher E. Bernhardt, D. Reide Corbett, Simon E. Engelhart, Shimon C. Anisfeld, Andrew C. Parnell, Niamh Cahill
Reconstructing vegetation response to altered hydrology and its use for restoration, Arthur R. Marshall Loxahatchee National Wildlife Refuge, Florida Reconstructing vegetation response to altered hydrology and its use for restoration, Arthur R. Marshall Loxahatchee National Wildlife Refuge, Florida
We present reconstructed hydrologic and vegetation trends of the last three centuries across the Arthur R. Marshall Loxahatchee National Wildlife Refuge, Florida in order to understand the effects of 20th century water management. We analyzed pollen assemblages from cores at marsh sites along three transects to document vegetation and infer hydroperiod and water depth both before and...
Authors
Christopher E. Bernhardt, Laura A. Brandt, Bryan D. Landacre, Marci E. Marot, Debra A. Willard