USGS scientists aboard a boat measure an estuarine sediment push core collected in an acrylic barrel.
Marci Marot
Marci Marot is a Geologist and Laboratory Manager at the St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida.
Marci Marot is the Laboratory Manager at the St. Petersburg Coastal and Marine Science Center in St. Petersburg, Florida.
Professional Experience
1993 - 2018 Geologist, U.S. Geological Survey, St. Petersburg Coastal & Marine Geology Science Center
2018 - present Laboratory Manager, U.S. Geological Survey, St. Petersburg Coastal & Marine Geology Science Center
Science and Products
Sea-level and Storm Impacts on Estuarine Environments and Shorelines (SSIEES)
Sediment Radiochemical Data from Georgia, Massachusetts and Virginia Coastal Marshes
Sedimentary Data from Grand Bay, Alabama/Mississippi, 2014-2016
Sedimentary Data Collected in April 2013 From Dauphin Island and Salt Marshes of Coastal Alabama
Benthic Foraminiferal Data from Sedimentary Cores Collected in the Grand Bay (Mississippi) and Dauphin Island (Alabama) Salt Marshes
Benthic Foraminiferal Data from the Eastern Mississippi Sound Salt Marshes and Estuaries
The Sedimentological Characteristics and Radiochemistry Data for the Marshes on Dauphin Island, Alabama
Sedimentary Data from the Coastal Marshes Fringing the Lower Waccasassa River, Northwest Florida
Seasonal Sedimentary Data Collected from Old Tampa Bay, Florida, 2015-2016
USGS scientists aboard a boat measure an estuarine sediment push core collected in an acrylic barrel.
Multi-proxy record of ocean-climate variability during the last 2 millennia on the Mackenzie Shelf, Beaufort Sea
Impacts of Hurricane Irma on Florida Bay Islands, Everglades National Park, U.S.A.
Rapid inundation of the southern Florida coastline despite low relative sea-level rise rates during the late-Holocene
Temperature mediates secondary dormancy in resting cysts of Pyrodinium bahamense (Dinophyceae)
The mighty Susquehanna—extreme floods in Eastern North America during the past two millennia
The sedimentological characteristics and geochronology of the marshes of Dauphin Island, Alabama
How could a freshwater swamp produce a chemical signature characteristic of a saltmarsh?
The physical characteristics of the sediments on and surrounding Dauphin Island, Alabama
Sediment lithology and radiochemistry from the back-barrier environments along the northern Chandeleur Islands, Louisiana—March 2012
Evaluating the potential effects of hurricanes on long-term sediment accumulation in two micro-tidal sub-estuaries: Barnegat Bay and Little Egg Harbor, New Jersey, U.S.A.
Sedimentologic characteristics of recent washover deposits from Assateague Island, Maryland
A seasonal comparison of surface sediment characteristics in Chincoteague Bay, Maryland and Virginia, USA
Science and Products
- Science
Sea-level and Storm Impacts on Estuarine Environments and Shorelines (SSIEES)
This project assesses the physical controls of sediment and material exchange between wetlands and estuarine environments along the northern Gulf of Mexico (Grand Bay Alabama/Mississippi and Vermilion Bay, Louisiana) and the Atlantic coast (Chincoteague Bay, Virginia/Maryland). - Data
Sediment Radiochemical Data from Georgia, Massachusetts and Virginia Coastal Marshes
This data release is an archive of sedimentary laboratory analytical data produced by scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) for sediment cores and surface samples collected from coastal marshes in Georgia (GA), Virginia (VA), and Massachusetts (MA). Collaborators from USGS Patuxent Wildlife Research Center (PWRC) and the VirginiaSedimentary Data from Grand Bay, Alabama/Mississippi, 2014-2016
This data release is an archive of sedimentary field and laboratory analytical data collected in Grand Bay, Alabama/Mississippi from 2014-2016 by scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC). This work, a component of the SPCMSC's Sea-level and Storm Impacts on Estuarine Environments and Shorelines (SSIEES) project, provides the necessarSedimentary Data Collected in April 2013 From Dauphin Island and Salt Marshes of Coastal Alabama
From April 13 to 20, 2013, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) collected push cores and vibracores on Dauphin Island, Alabama, along with push and auger cores in salt marshes at several locations in southwestern coastal Alabama. This work, a component of the SPCMSCs Barrier Island Evolution Research (BIER) project, was conductedBenthic Foraminiferal Data from Sedimentary Cores Collected in the Grand Bay (Mississippi) and Dauphin Island (Alabama) Salt Marshes
Microfossil (benthic foraminifera) data from coastal areas were collected from state and federally managed lands within the Grand Bay National Estuarine Research Reserve and Grand Bay National Wildlife Refuge, Grand Bay, Mississippi/Alabama; federally managed lands of Bon Secour National Wildlife Refuge on Cedar Island and Little Dauphin Island, Alabama; and municipally managed land around DauphinBenthic Foraminiferal Data from the Eastern Mississippi Sound Salt Marshes and Estuaries
Microfossil (benthic foraminifera) and coordinate/elevation data were obtained from sediments collected in the coastal zones of Mississippi and Alabama, including marsh and estuarine environments of eastern Mississippi Sound and Mobile Bay, in order to develop a census for coastal environments and to aid in paleoenvironmental reconstruction. These data provide a baseline dataset for use in futureThe Sedimentological Characteristics and Radiochemistry Data for the Marshes on Dauphin Island, Alabama
Scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center collected push cores from the marshes of Dauphin Island, Little Dauphin Island, and Cedar Key, Alabama in August, 2015 (U.S. Geological Survey Field Activity Number 2015-322-FA). Sample sites varied between high marshes, low salt marshes, and sand flats. This report serves as an archive for the sedimentoloSedimentary Data from the Coastal Marshes Fringing the Lower Waccasassa River, Northwest Florida
The Waccasassa River is located in a small watershed situated along the middle section of the low-gradient, low-energy, sediment-starved Big Bend coast in west central Florida. The river mouth empties into the head of the shallow, microtidal Waccasassa Bay and the Gulf of Mexico. The lower end of the river and the surrounding coastline are dominated by coast-parallel Juncus roemerianus salt marsheSeasonal Sedimentary Data Collected from Old Tampa Bay, Florida, 2015-2016
The toxic dinoflagellate Pyrodinium bahamense produces recurring, persistent summer algal blooms in Old Tampa Bay, Florida, which degrade water quality and are potentially harmful to humans if contaminated shellfish is consumed. As part of its life cycle, Pyrodinium bahamense produces dormant cysts, which settle to the seafloor, forming seed beds that may initiate future blooms if favorable condit - Multimedia
USGS scientists with an estuarine sediment push coreUSGS scientists with an estuarine sediment push core
USGS scientists aboard a boat measure an estuarine sediment push core collected in an acrylic barrel.
USGS scientists aboard a boat measure an estuarine sediment push core collected in an acrylic barrel.
- Publications
Filter Total Items: 21
Multi-proxy record of ocean-climate variability during the last 2 millennia on the Mackenzie Shelf, Beaufort Sea
A 2,000 year-long oceanographic history, in sub-centennial resolution, from a Canadian Beaufort Sea continental shelf site (60meters water depth) near the Mackenzie River outlet is reconstructed from ostracode and foraminifera faunal assemblages, shell stable isotopes (delta 18O, delta 13C) and sediment biogenic silica. The chronology of three sediment cores making up the composite section was esAuthorsLaura Gemery, Thomas M. Cronin, Lee W. Cooper, Lucy Roberts, Lloyd D Keigwin, Jason A. Addison, Melanie Leng, Peigen Lin, Cedric Magen, Marci E. Marot, Valerie SchwartzImpacts of Hurricane Irma on Florida Bay Islands, Everglades National Park, U.S.A.
Hurricane Irma made landfall in south Florida, USA, on September 10, 2017 as a category 4 storm. In January 2018, fieldwork was conducted on four previously (2014) sampled islands in Florida Bay, Everglades National Park to examine changes between 2014 and 2018. The objectives were to determine if the net impact of the storm was gain or loss of island landmass and/or elevation; observe and quantifAuthorsG. Lynn Wingard, Sarah E. Bergstresser, Bethany Stackhouse, Miriam Jones, Marci E. Marot, Kristen Hoefke, Andre Daniels, Katherine KellerRapid inundation of the southern Florida coastline despite low relative sea-level rise rates during the late-Holocene
Sediment cores from Florida Bay, Everglades National Park were examined to determine ecosystem response to relative sea-level rise (RSLR) over the Holocene. High-resolution multiproxy analysis from four sites show freshwater wetlands transitioned to mangrove environments 4–3.6 ka, followed by estuarine environments 3.4–2.8 ka, during a period of enhanced climate variability. We calculate a RSLR raAuthorsMiriam Jones, G. Lynn Wingard, Bethany Stackhouse, Katherine Keller, Debra A. Willard, Marci E. Marot, Bryan D. Landacre, Christopher E. BernhardtTemperature mediates secondary dormancy in resting cysts of Pyrodinium bahamense (Dinophyceae)
High‐biomass blooms of the toxic dinoflagellate Pyrodinium bahamense occur most summers in Tampa Bay, Florida, USA, posing a recurring threat to ecosystem health. Like many dinoflagellates, P. bahamense forms immobile resting cysts that can be deposited on the seafloor—creating a seed bank that can retain the organism within the ecosystem and initiate future blooms when cysts germinate. In this stAuthorsCary B. Lopez, Aliza Karim, Susan Murasko, Marci E. Marot, Christopher G. Smith, Alina A. CorcoranThe mighty Susquehanna—extreme floods in Eastern North America during the past two millennia
The hazards posed by infrequent major floods to communities along the Susquehanna River and the ecological health of Chesapeake Bay remain largely unconstrained due to the short length of streamgage records. Here we develop a history of high‐flow events on the Susquehanna River during the late Holocene from flood deposits contained in MD99‐2209, a sediment core recovered in 26 m of water from ChesAuthorsMichael Toomey, Meagan Cantwell, Steven Colman, Thomas M. Cronin, Jeffrey P. Donnelly, Liviu Giosan, Clifford Heil, Robert L. Korty, Marci E. Marot, Debra A. WillardThe sedimentological characteristics and geochronology of the marshes of Dauphin Island, Alabama
In August 2015, scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center collected 11 push cores from the marshes of Dauphin Island and Little Dauphin Island, Alabama. Sample site environments included high marshes, low salt marshes, and salt flats, and varied in distance from the shoreline. The sampling efforts were part of a larger study to assess the feasibilAuthorsAlisha M. Ellis, Christopher G. Smith, Marci E. MarotHow could a freshwater swamp produce a chemical signature characteristic of a saltmarsh?
Reduction–oxidation (redox) reaction conditions, which are of great importance for the soil chemistry of coastal marshes, can be temporally dynamic. We present a transect of cores from northwest Florida wherein radical postdepositional changes in the redox regime has created atypical geochemical profiles at the bottom of the sedimentary column. The stratigraphy is consistent along the transect, coAuthorsTerrence A. McCloskey, Christopher G. Smith, Kam-biu Liu, Marci E. Marot, Christian HallerThe physical characteristics of the sediments on and surrounding Dauphin Island, Alabama
Scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center collected 303 surface sediment samples from Dauphin Island, Alabama, and the surrounding water bodies in August 2015. These sediments were processed to determine physical characteristics such as organic content, bulk density, and grain-size. The environments where the sediments were collected include highAuthorsAlisha M. Ellis, Marci E. Marot, Christopher G. Smith, Cathryn J. WheatonSediment lithology and radiochemistry from the back-barrier environments along the northern Chandeleur Islands, Louisiana—March 2012
Scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center collected a set of 8 sediment cores from the back-barrier environments along the northern Chandeleur Islands, Louisiana, in March 2012. The sampling efforts were part of a larger USGS study to evaluate effects on the geomorphology of the Chandeleur Islands following the construction of an artificialAuthorsMarci E. Marot, Christopher G. Smith, C. Scott Adams, Kathryn A. RichwineEvaluating the potential effects of hurricanes on long-term sediment accumulation in two micro-tidal sub-estuaries: Barnegat Bay and Little Egg Harbor, New Jersey, U.S.A.
Barnegat Bay, located along the eastern shore of New Jersey, was significantly impacted by Hurricane Sandy in October 2012. Scientists from the U.S. Geological Survey (USGS) developed a multidisciplinary study of sediment transport and hydrodynamics to understand the mechanisms that govern estuarine and wetland responses to storm forcing. This report details the physical and chemical characteristiAuthorsMarci E. Marot, Christopher G. Smith, Alisha M. Ellis, Cathryn J. WheatonSedimentologic characteristics of recent washover deposits from Assateague Island, Maryland
The U.S. Geological Survey has a long history of responding to and documenting the impacts of storms along the Nation’s coasts and incorporating these data into storm impact and coastal change vulnerability assessments. Although physical changes caused by tropical and extratropical storms to the sandy beaches and dunes fronting barrier islands are generally well documented, the interaction betweenAuthorsJulie Bernier, Nicholas J. Zaremba, Cathryn J. Wheaton, Alisha M. Ellis, Marci E. Marot, Christopher G. SmithA seasonal comparison of surface sediment characteristics in Chincoteague Bay, Maryland and Virginia, USA
Scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center conducted a seasonal collection of surficial sediments from Chincoteague Bay and Tom's Cove, between Assateague Island and the Delmarva Peninsula in late March/early April 2014 and October 2014. The sampling efforts were part of a larger U.S. Geological Survey study to assess the effects of storm events onAuthorsAlisha M. Ellis, Marci E. Marot, Cathryn J. Wheaton, Julie Bernier, Christopher G. Smith