# 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/southcarolina/waccamaw2017loi11-11-3-1.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: Waccamaw11-11-3-1 # Location: North America>United States Of America>Georgia # Country: United States Of America # Northernmost_Latitude: 33.422823 # Southernmost_Latitude: 33.422823 # Easternmost_Longitude: -79.207996 # Westernmost_Longitude: -79.207996 # Elevation: #------------------ # Data_Collection # Collection_Name: Waccamaw11-11-3-1LOI # Earliest_Year: 1030 # Most_Recent_Year: -61 # Time_Unit: Cal. Year BP # Core_Length: 0.86 # Notes: Butler Island, moderately salt impacted TFFW (tidal freshwater forested wetlands). Percent compressed 37.1; original depth 140 #------------------ # Chronology_Information # Chronology: # Lab_ID depth_cm age_14C 14C error Material dated # WW9340 9-10 >Modern seeds # WW9341 24-25 185 30 seeds # Beta-353945 31-32 220 30 Bulk organic, picked free of roots # Beta-352947 39-40 40* 30 Bulk organic, picked free of roots * date rejected # WW9342 51-52 520 30 seeds # WW9343 74-75 1180 30 seeds # #---------------- # 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 1 41.83 0.272727273 2 44.872 0.146892655 3 53.158 0.325900515 4 58.621 0.257092199 5 60.993 0.25044405 6 59.504 0.232245681 7 55.797 0.261859583 8 59.14 0.17816092 9 62.963 0.149722736 10 72.152 0.146025878 11 74.286 0.06227758 12 66.99 0.192523364 13 66.304 0.17037037 14 59.459 0.200723327 15 54.745 0.258979206 16 58.333 0.169014085 17 24.405 0.326213592 18 24.772 1.00733945 19 25.468 0.510516252 20 25.67 0.427868852 21 24.39 0.225688073 22 25.138 0.664220183 23 24.286 0.258302583 24 22.727 0.347826087 25 24.257 0.38697318 26 42.857 0.089908257 27 40.741 0.236842105 28 23.41 0.633699634 29 25.275 0.179133858 30 19.343 0.503676471 31 21.25 0.29250457 32 23.926 0.281034483 33 22.822 0.435018051 34 21.951 0.077212806 35 22.727 0.248587571 37 36.145 0.14874552 38 24.211 0.178571429 39 22.523 0.20441989 40 22.606 0.709433962 41 24.561 0.217973231 42 22.956 0.628458498 43 28.846 0.093189964 44 20.548 0.125 45 29.577 0.391544118 46 28.571 0.138842975 47 22.727 0.549019608 48 25.322 0.422867514 49 22.951 0.335164835 50 22.541 0.446886447 51 22.172 0.400362319 53 21.831 0.252220249 54 21.905 0.543103448 55 24.37 0.217550274 56 21.895 0.569832402 57 21.676 0.632541133 58 20.238 0.161538462 59 21.586 0.409747292 60 21.645 0.433395872 61 22.338 0.914122137 62 23.913 0.353166987 63 30.66 0.80608365 64 27.692 0.5078125 65 29.719 0.434554974 66 31.293 0.277882798 67 34.021 0.173835125 68 40.385 0.305283757 69 44.767 0.33463035 70 57.692 0.184724689 71 44.318 0.338461538 72 41.981 0.421471173 73 51.531 0.363636364 74 55.026 0.088029809 75 54.225 0.065197429 76 50.407 0.058156028 77 41.358 0.0785645 78 47.94 0.125175809 79 38.136 0.103372755 80 40.729 0.154823529 81 38.889 0.237288136 82 42.162 0.302782324 83 39.855 0.237931034 84 42.697 0.164206642 85 39.744 0.15 86 34.694 0.193675889