# 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/savannah2017loi12-12-11-1.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: Savannah12-12-11-1 # Location: North America>United States Of America>Georgia # Country: United States Of America # Northernmost_Latitude: 32.238 # Southernmost_Latitude: 32.238 # Easternmost_Longitude: -81.155 # Westernmost_Longitude: -81.155 # Elevation: #------------------ # Data_Collection # Collection_Name: Savannah12-12-11-1LOI # Earliest_Year: 4000 # Most_Recent_Year: -61 # Time_Unit: Cal. Year BP # Core_Length: 3.2 # Notes: Upper Freshwater TFFW (tidal freshwater forested wetlands) #------------------ # Chronology_Information # Chronology: # Lab_ID depth_cm age_14C 14C error Material dated # Beta-381823 68-69 590 30 Bulk organic, picked free of roots # Beta-357069 102-103 1350 30 Bulk organic, picked free of roots # Beta-420004 197-198 3010 30 Bulk organic, picked free of roots # Beta-357070 243-244 3940 30 Bulk organic, picked free of roots # Beta-357071 313-314 4010 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 29.89 0.565 8 30.24 0.3069 12 33.21 0.1855 15 25.21 0.1555 17 20.95 0.976 19 22.16 1.0177 22 17.84 0.824 23 18.14 1.2359 25 16.38 0.8679 27 16.81 1.749 29 16.46 1.0595 30 13.79 0.58 36 15.92 1.4134 40 11.11 0.54 46 13.53 0.9187 50 14.89 0.47 56 18.14 0.8372 60 14.71 0.34 66 17.51 1.5188 70 15.69 0.51 76 15.15 1.1931 80 12.12 0.66 86 11.09 1.2626 90 6.17 0.81 96 8.41 1.2798 100 24.24 0.4125 106 9.03 1.136 110 7.87 0.89 116 7.9 1.4108 120 6.38 0.94 126 7.76 1.2642 130 7.14 0.84 137 7.87 1.4627 140 9.21 0.76 146 9.13 1.3177 150 10.96 0.73 157 20.79 0.8644 160 14 0.5 166 16.48 1.0595 170 14.86 0.74 176 12.79 1.2318 180 10.23 0.88 186 11.46 1.2144 190 9.59 0.73 196 10.44 1.2362 200 44.83 0.87 206 14.89 1.1816 210 11.54 0.78 216 15.43 1.0212 220 14.81 0.54 225 51.41 0.5462 230 100 0.233333333 235 21.96 1.1179 240 36.84 0.19 246 23.8 1.1082 250 20.51 0.39 257 21.37 0.8572 260 25 0.32 266 27.84 0.643 270 5.63 1.42 274 17.08 1.0743 280 31.03 0.29 286 8.78 1.1236 290 6.17 0.81 296 7.85 1.1723 300 6.19 0.97 306 4.07 1.2058 310 1.19 0.84 316 4.34 1.5032 320 4.3 0.93