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GCE-LTER Data Set Summary

Accession: POR-GCEM-2101 Research Theme: Pore-water Chemistry (Monitoring)
Contributors: Steven C. Pennings, Alyssa Peterson, Dontrece Smith, Jacob Shalack
Title: Soil salinity and organic content at GCE-LTER vegetation monitoring plots in October 2020
Abstract: Soil samples were collected in conjunction with Fall 2020 plant monitoring at half of the permanent vegetation monitoring plots in the creekbank and midmarsh zones at 10 GCE study sites. Pore-water salinity was determined by analysis of supernatant salinity in dried soil samples hydrated with a measured volume of deionized water. Organic content was measured gravimetrically by comparing ash-free dry weight and total weight of soil samples.
DOI: (not assigned)
Key Words: chemistry, marshes, mud, permanent plots, porewater, salinity, Sediment Monitoring, sediments, soils
LTER Core Area: Inorganic Matter
Research Themes: GCE2 Q2 - Domain Patterns, GCE3 Area2 - Patterns within the Domain, Pore-water Chemistry, Plant Ecology
Study Period: 08-Oct-2020 to 15-Oct-2020
Study Sites:
GCE1 -- Eulonia, Georgia, USA
GCE2 -- Four Mile Island, Georgia, USA
GCE3 -- North Sapelo, Sapelo Island, Georgia, USA
GCE4 -- Meridian, Georgia, USA
GCE5 -- Folly River, Georgia, USA
GCE6 -- Dean Creek, Sapelo Island, Georgia, USA
GCE7 -- Carrs Island, Georgia, USA
GCE8 -- Alligator Creek, Georgia, USA
GCE9 -- Rockdedundy Island, Georgia, USA
GCE10 -- Hunt Camp, Sapelo Island, Georgia, USA
» Download Geographic Coverage: Google Earth
Project References: End of year biomass
Downloads: Information

Data Table: POR-GCEM-2101 (Main data table for data set POR-GCEM-2101, 88 records)

Access: GCE Members only (public release on 09-Aug-2023)

Metadata: Text (ESA FLED), XML (Ecological Metadata Language)

Data Formats: Spreadsheet (CSV) [15.24kb],  Text File [12.84kb],  MATLAB (GCE Toolbox) [74.85kb],  MATLAB (Variables) [83.43kb],  Text Report [104.97kb]

Column List:(hide)

Column Name Units Type Description
1 Year YYYY integer Calendar year sample was collected
2 Month MM integer Calendar month sample was collected
3 Day DD integer Calendar day sample was collected
4 Site none integer GCE study site code
5 Zone none integer Marsh zone
6 Plot none integer Plot number
7 Location none string Geographic location code in the GCE Metadata Database for the sampling plot
8 Flag_Location none string QA/QC flags for Geographic location code in the GCE Metadata Database for the sampling plot (flagging criteria, where "x" is Location: manual)
9 Location_Notes none string Notes on location assignments and geographic accuracy
10 Longitude degrees floating-point Geographic longitude in decimal degrees
11 Flag_Longitude none string QA/QC flags for Geographic longitude in decimal degrees (flagging criteria, where "x" is Longitude: x<-180="I", x>180="I", manual)
12 Latitude degrees floating-point Geographic latitude in decimal degrees
13 Flag_Latitude none string QA/QC flags for Geographic latitude in decimal degrees (flagging criteria, where "x" is Latitude: x<-90="I", x>90="I", manual)
14 Soil_Cup_Mass grams floating-point Mass of cup
15 Soil_Total_Weight grams floating-point Weight of soil and cup before drying
16 Soil_Dry_Weight grams floating-point Weight of soil and cup after drying
17 Soil_Water_Content grams floating-point Weight of water in soil calculated by subtraction of dry weight from initial weight
18 Soil_Water_Percent percent floating-point Percentage of water in soil calculated from dry weight and initial weight
19 Deionized_Water_Added ml floating-point Amount of deionized water added to the dry soil sample
20 Soil_Salinity_Supernatant PSU floating-point Salinity of soil sample supernatant after resuspension of dried soil in deionized water
21 Soil_Salinity_Porewater PSU floating-point Porewater salinity calculated from soil sample dry weight and salinity of supernatant after resuspension in water
22 Crucible_Weight grams floating-point Weight of empty crucible
23 Flag_Crucible_Weight none string QA/QC flags for Weight of empty crucible (flagging criteria, where "x" is Crucible_Weight: x<0="I", x<1="Q", x>50="Q")
24 Soil_Crucible_Wet_Weight grams floating-point Weight of crucible and dried soil sample before combustion
25 Flag_​Soil_​Crucible_​Wet_​Weight none string QA/QC flags for Weight of crucible and dried soil sample before combustion (flagging criteria, where "x" is Soil_Crucible_Wet_Weight: x<0="I", x<7="Q", x>70="Q")
26 Soil_Crucible_Ash_Weight grams floating-point Weight of crucible and sample after combustion (ash free dry weight)
27 Flag_​Soil_​Crucible_​Ash_​Weight none string QA/QC flags for Weight of crucible and sample after combustion (ash free dry weight) (flagging criteria, where "x" is Soil_Crucible_Ash_Weight: x<0="I", x<6="Q", x>70="Q")
28 Soil_Organic_Content grams floating-point Mass of organic matter lost on combustion
29 Flag_Soil_Organic_Content none string QA/QC flags for Mass of organic matter lost on combustion (flagging criteria, where "x" is Soil_Organic_Content: x<0="I", x>5="Q")
30 Soil_Organic_Percent percent floating-point Percentage of organic matter in sample calculated from organic content and dry weight of soil
Citation: Pennings, Steven C. 2021. Soil salinity and organic content at GCE-LTER vegetation monitoring plots in October 2020. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://gce-lter.marsci.uga.edu/data/POR-GCEM-2101

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This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959, OCE-1237140 and OCE-1832178. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.