# 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/savannah2017loi12-12-10-3.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: Savannah12-12-10-3 # Location: North America>United States Of America>Georgia # Country: United States Of America # Northernmost_Latitude: 32.17 # Southernmost_Latitude: 32.17 # Easternmost_Longitude: -81.14 # Westernmost_Longitude: -81.14 # Elevation: #------------------ # Data_Collection # Collection_Name: Savannah12-12-10-3LOI # Earliest_Year: 5820 # Most_Recent_Year: -61 # Time_Unit: Cal. Year BP # Core_Length: 3.48 # Notes: Oligohaline Marsh #------------------ # Chronology_Information # Chronology: # Lab_ID depth_cm age_14C 14C error Material dated # Beta-381816 109-110 160 30 Bulk organic, picked free of roots # Beta-381817 178-180 2010 30 Bulk organic, picked free of roots # Beta-381818 269-270 3880 30 Bulk organic, picked free of roots # Beta-381820 346-347 5060 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 7 60.38 0.1093 10 44.66 0.1498 15 28.7 0.2331 20 56.4 0.1445 25 55.16 0.1394 30 63.07 0.0872 35 46.83 0.104 40 44.58 0.155 45 32.15 0.1639 50 29.83 0.176 55 34.88 0.1534 60 25.27 0.239 65 23.29 0.2091 70 19.06 0.2524 75 18.97 0.2946 80 15.19 0.3923 85 23.33 0.2902 90 16.29 0.4672 95 16.08 0.4385 100 15.86 0.4149 105 13.78 0.4324 110 12.25 0.7976 115 11.7 0.793 120 11.24 0.7787 125 11.18 0.7397 130 10.45 0.6939 133 12.51 0.6636 135 13.27 0.8123 137 14.57 0.6829 139 14.42 0.5972 143 22.4 0.5148 145 27.05 0.336 147 26.55 0.4174 150 28.96 0.2541 155 41.45 0.1672 160 38.01 0.1681 165 38.99 0.1775 170 37.97 0.1841 175 41.23 0.1426 180 100 0.0322 185 68.75 0.0864 190 93.72 0.1179 195 27.46 0.3267 200 24.52 0.2631 205 48.47 0.1694 210 24.79 0.2783 215 16.46 0.5024 220 16.43 0.4826 225 21.64 0.3314 230 25.74 0.3461 235 17.94 0.4582 240 18.43 0.4595 245 15.72 0.556 250 21.13 0.2702 255 27.7 0.2318 260 25.35 0.3527 265 24.75 0.3143 270 27.66 0.2824 275 38.37 0.1329 280 24.57 0.2414 285 13.66 0.506 290 14.46 0.4967 295 21.62 0.3672 300 21.67 0.3576 305 22.63 0.3116 310 16.03 0.5459 315 21.91 0.3783 320 16.61 0.4058 325 18.33 0.4349 330 18.67 0.4638 335 13.95 0.5342 340 20.38 0.4371 345 28.14 0.2751 350 42.95 0.2163