# Waccamaw/Savannah River Wetlands Late Holocene Multiproxy Sediment Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/26690 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/georgia/savannah2017loi12-12-10-2.txt # Description: NOAA location of the template # # Original_Source_URL: # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleolimnology # # Dataset DOI: # # Parameter_Keywords: geochemistry, physical properties, population abundance #-------------------- # Contribution_Date # Date: 2019-05-01 #-------------------- # File_Last_Modified_Date # Date: 2019-05-01 #-------------------- # Title # Study_Name: Waccamaw/Savannah River Wetlands Late Holocene Multiproxy Sediment Data #-------------------- # Investigators # Investigators: Jones, M.C.; Bernhardt, C.E.; Krauss, K.W.; Noe, G.B. #-------------------- # Description_Notes_and_Keywords # Description: Multiproxy (pollen, plant macrofossils, sediment accretion, and carbon accumulation) data from river wetlands sediment cores. # Cores are from 2 transects ranging from tidal freshwater forested wetlands (TFFW) to oligohaline marsh, along the Waccamaw and Savannah # Rivers (South Carolina and Georgia, USA) for the late Holocene (~6,000 - 1,500 years BP). #-------------------- # Publication # Authors: Miriam C. Jones, Christopher E. Bernhardt, Ken W. Krauss, Gregory B. Noe # Published_Date_or_Year: 2017-12-01 # Published_Title: The Impact of Late Holocene Land Use Change, Climate Variability, and Sea Level Rise on Carbon Storage in Tidal Freshwater Wetlands on the Southeastern United States Coastal Plain # Journal_Name: Journal of Geophysical Research Biogesciences # Volume: 122 # Edition: # Issue: 12 # Pages: 3126-3141 # Report_Number: # DOI: 10.1002/2017JG004015 # Online_Resource: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JG004015 # Full_Citation: # Abstract: This study examines Holocene impacts of changes in climate, land use, and sea level rise (SLR) on sediment accretion, carbon accumulation rates (CAR), and vegetation along a transect of tidal freshwater forested wetlands (TFFW) to oligohaline marsh along the Waccamaw River, South Carolina (four sites) and along the Savannah River, Georgia (four sites). We use pollen, plant macrofossils, accretion, and CAR from cores, spanning the last 1,500-6,000 years to test the hypothesis that TFFW have remained stable throughout the late Holocene and that marshes transitioned from TFFW during elevated SLR during the Medieval Climate Anomaly, with further transformation resulting from colonial land use change. Results show low and stable accretion and CAR through much of the Holocene, despite moderate changes associated with Holocene paleoclimate. In all records, the largest observed change occurred within the last ~400 years, driven by colonial land clearance, shifting terrigenous sediment into riparian wetlands, resulting in order-of-magnitude increases in accretion and C accumulation. The oligohaline marshes transitioned from TFFW ~300-500 years ago, coincident with colonial land clearance. Postcolonial decreases in CAR and accretion occur because of watershed reforestation over the last century. All sites show evidence of recent (decades to century) swamp forest decline due to increasing salinity and tidal inundation from SLR. This study suggests that allochthonous sediment input during colonialization helped maintain TFFW but that current SLR rates are too high for TFFW to persist, although higher accretion rates in oligohaline marshes increase the resilience of tidal wetlands as they transition from TFFW to marsh. #------------------ # Funding_Agency # Funding_Agency_Name: United States Geological Survey # Grant: Climate and Land Use Change R&D #------------------ # Site_Information # Site_Name: Savannah12-12-10-2 # Location: North America>United States Of America>Georgia # Country: United States Of America # Northernmost_Latitude: 32.18 # Southernmost_Latitude: 32.18 # Easternmost_Longitude: -81.14 # Westernmost_Longitude: -81.14 # Elevation: #------------------ # Data_Collection # Collection_Name: Savannah12-12-10-2LOI # Earliest_Year: 4200 # Most_Recent_Year: -61 # Time_Unit: Cal. Year BP # Core_Length: 2.99 # Notes: Heavily Salt-impacted TFFW (tidal freshwater forested wetlands) #------------------ # Chronology_Information # Chronology: # Lab_ID depth_cm age_14C 14C error Material dated # Beta-381820 60-61 80 30 Bulk organic, picked free of roots # Beta-357066 76-77 130 30 Bulk organic, picked free of roots # Beta-381821 112-113 1060 30 Bulk organic, picked free of roots # Beta-357067 159-160 1900 30 Bulk organic, picked free of roots # Beta-357068 297-298 3820 30 Bulk organic, picked free of roots # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: one per line, shortname-tab-variable components (what, material, error, units, seasonality, data type,detail, method, C or N for Character or Numeric data, free text) # ## depth_cm depth, , , cm, , , , ,N, Depths are lower depths ## LOI550 organic matter, sediment, , percent, ,paleolimnology,,loss on ignition,N, LOI at 550C ## DBD density, sediment, , gram per cubic centimeter, ,paleolimnology,,,N,dry bulk density # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # depth_cm LOI550 DBD 3 15.6 1.0333 5 15.9 1.425 7 15.6 1.0426 9 15.3 0.9096 13 16.3 1.3871 15 16.3 1.0435 17 20.9 0.62 19 20.6 0.8562 23 26.3 0.5495 25 36.6 0.458 27 21.2 0.7778 29 21.8 0.6939 35 32.3 0.745 45 26.2 0.4746 55 31.9 0.4522 65 17.9 0.7523 75 15.5 1.4348 85 14.5 1.4356 95 12.1 0.9148 105 12.3 1.0408 115 9.76 1.0459 125 9.26 1.4525 132 10.6 1.2569 133 10.9 0.9268 134 11.2 1.2086 135 11.1 1.236 137 12.8 1.0019 138 12.7 1.1587 139 14.3 1.1781 140 14.8 1.8854 142 15.3 1.0717 143 15.4 1.8934 144 16.8 1.2255 145 18.6 0.7588 147 15.5 1.0692 148 15.3 1.1408 149 16.2 1.1207 150 17.5 1.4671 155 21.3 1.07 165 18 0.9732 175 14.8 1.401 185 13.3 1.4352 195 17 0.971 202 19.9 1.4202 204 9.8 1.2752 212 11.5 0.9231 215 25.1 0.7383 222 9.64 1.1032 225 19.4 0.9662 232 18.7 0.7037 235 19 1.0762 242 13.3 1.0302 245 13.5 1.1128 252 10.7 1.3296 255 10.1 1.1554 262 12 0.6146 265 28.1 0.3776 272 20.8 0.6928 275 20.3 1.0634 282 23.8 0.6287 285 15.8 1.2574 292 23.5 1.081 295 24.1 1.3722