Georgia Coastal Ecosystems LTER Data Set Details

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GCE-LTER Data Set Summary

Accession:

NUT-GCES-1608

Research Theme:

General Nutrient Chemistry (Directed Study)

Contributors:

Christopher B. Craft, Sarah Widney, Dontrece Smith, Joe Schubauer-Berigan, Ellen Herbert, Elena Solohin, Jennifer Desha

Title:

Porewater chemistry measurements from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx)

Abstract:

The Georgia Coastal Ecosystems LTER Seawater Addition Long-Term Experiment (SALTEx) is a large-scale field experiment designed to simulate saltwater intrusion in a tidal freshwater wetland to predict how chronic (Press) and acute (Pulse) salinization will affect this and other tidal freshwater ecosystems. The SALTEx experiment was initiated in 2012 and consists of 31 field plots, each 2.5 m on a side. There are three treatments (Press, Pulse, and Fresh) and two types of controls (with and without sides), each consisting of six replicates. The Press treatment plots receive regular (4 times each week) additions of a mixture of seawater and fresh river water. Pulse plots receive the same mixture of seawater and river water during September and October, which is historically a time of low flow in the river when natural saltwater intrusion occurs. The Fresh treatment plots receive regular additions of fresh river water. Treatment water is added during low tide to facilitate its infiltration into the soil, and all plots are inundated by astronomical tides at high tide. Response measurements include porewater chemistry, specifically concentrations of chloride, sulfate, sulfide, dissolved organic carbon (DOC), ammonium-N, nitrate/nitrite-N, dissolved reactive phosphorus, total phosphorus, total nitrogen, organic nitrogen, carbon:nitrogen (C:N) ratio, organic-carbon:organic-nitrogen ratio, and pH. Samples of source water were taken after collection (seawater, river water) or mixing (mixed seawater and river water in tanks) and analyzed for concentrations of dissolved reactive phosphorus, total phosphorus, ammonium-N, nitrate/nitrite-N, total nitrogen, organic nitrogen. Source water samples from 2016 and beyond also included measurements of dissolved organic carbon (DOC), carbon:nitrogen ratio, organic-carbon:organic-nitrogen ratio, chloride and sulfate.

DOI:

10.6073/pasta/045ad069c3bf253d7bd81fdffc2f5664

Key Words:

carbon, chloride, disturbance, inundation, marshes, nitrogen, nutrients, ph, phosphorus, porewater, press, pulse, salinity, soils, sulfate

LTER Core Area:

Disturbance Patterns, Inorganic Matter, Organic Matter

Research Themes:

GCE2 Q1 - External Forcing, GCE2 Q3 - Longitudinal Gradients, GCE3 Area3 - Responses to Salinity and Inundation, General Nutrient Chemistry, Chemistry, Pore-water Chemistry

Study Period:

15-Jan-2014 to 12-Aug-2020

Study Sites:

SALTEx -- SALTEx Research Site, Champney Island, Georgia, USA

» Download Geographic Coverage: Google Earth

Project References:

SALTEx - Seawater Addition Long Term Experiment

Research Protocols:

SALTEx Ammonium (NH4) Wet Chemistry Protocol (ESF-SOP 02702011-02-18) (U.S. EPA Watershed Management Research: Experimental Stream Facility and Associated Field Studies)

SALTEx DOC Protocol (Georgia Coastal Ecosystems LTER)

SALTEx Ion Chromatograph Analysis protocol (Georgia Coastal Ecosystems LTER)

SALTEx Reactive Phosphorus Wet Chemistry Protocol (ESF-SOP 0029) (U.S. EPA Watershed Management Research: Experimental Stream Facility and Associated Field Studies)

SALTEx Quarterly Porewater Sampling Protocol (Georgia Coastal Ecosystems LTER)

SALTEx Map Plot Layout (Georgia Coastal Ecosystems LTER)

SALTEx Sulfide Analysis Protocol (Georgia Coastal Ecosystems LTER)

SALTEx Total Nitrogen and Total Dissolved Nitrogen Wet Chemistry Protocol (ESF-SOP 0028) (U.S. EPA Watershed Management Research: Experimental Stream Facility and Associated Field Studies)

SALTEx Total Phosphorus and Total Dissolved Phosphorus Wet Chemistry Protocol (ESF-SOP 030) (U.S. EPA Watershed Management Research: Experimental Stream Facility and Associated Field Studies)

Publications:

Craft, C.B., Herbert, E., Li, F., Smith, D., Schubauer-Berigan, J.P., Widney, S., Angelini, C., Pennings, S.C., Medeiros, P.M., Byers, J. and Alber, M. 2016. Climate change and the fate of coastal wetlands. Wetland Science and Practice. 33(3):70-73.

Downloads:

Data Table: NUT-GCES-1608_SALTEx (SALTEx porewater chemistry measurements, 511 records)

Access: Public (released 10-Sep-2016)

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

Data Formats: Spreadsheet (CSV) [61.21kb], Text File [58.19kb], MATLAB (GCE Toolbox) [59.85kb], MATLAB (Variables) [55.68kb], Text Report [90.88kb]

Column List:(display)

Column	Name	Units	Type	Description
1	Year	YYYY	integer	Year the sample was collected
2	Flag_Year	none	string	QA/QC flags for Year the sample was collected (flagging criteria, where "x" is Year: x<2014="Q", x>2019="Q")
3	Month	MM	integer	Month the sample was collected
4	Day	DD	integer	Day the sample was collected
5	Date	YYYY-MM-DD	string	Calendar date
6	Treatment	none	string	Sample treatment
7	Replicate	none	integer	Replicate
8	Elevation	m	floating-point	Mean plot elevation relative to MLW
9	Dissolved_Reactive_Phosphorus	ug/L	floating-point	Dissolved reactive phosphorus (DRP) as ug-P/L
10	Total_Phosphorus	ug/L	floating-point	Total phosphorus (TP) as ug-P/L
11	Ammonium	ug/L	floating-point	Ammonium-N (NH4) as ug-N/L
12	Nitrate_Nitrite	ug/L	floating-point	Nitrate & nitrite (NO3 & NO2) as ug-N/L
13	Nitrite	ug/L	floating-point	Nitrite (NO2) as ug-N/L
14	Total_Nitrogen	ug/L	floating-point	Total nitrogen as ug-N/L
15	Organic_Nitrogen	ug/L	floating-point	Organic nitrogen as ug-N/L
16	Flag_Organic_Nitrogen	none	string	QA/QC flags for Organic nitrogen as ug-N/L (flagging criteria, where "x" is Organic_Nitrogen: x<0="I", x<0="Q", x>5000="Q")
17	Dissolved_Organic_Carbon	ug/L	floating-point	Dissolved organic carbon (DOC) as ug-C/L
18	Flag_Dissolved_Organic_Carbon	none	string	QA/QC flags for Dissolved organic carbon (DOC) as ug-C/L (flagging criteria, where "x" is Dissolved_Organic_Carbon: x<0="I", x<0="Q", x>30000="Q")
19	Carbon_to_Nitrogen_Ratio	none	floating-point	Carbon to nitrogen (CN) ratio (mol:mol)
20	Flag_Carbon_to_Nitrogen_Ratio	none	string	QA/QC flags for Carbon to nitrogen (CN) ratio (mol:mol) (flagging criteria, where "x" is Carbon_to_Nitrogen_Ratio: x<0="I", x<0="Q", x>100="Q")
21	Organic_Carbon_to_Organic_Nitrogen_Ratio	none	floating-point	Organic carbon to organic nitrogen (OCON) ratio (mol:mol)
22	Flag_Organic_Carbon_to_Organic_Nitrogen_Ratio	none	string	QA/QC flags for Organic carbon to organic nitrogen (OCON) ratio (mol:mol) (flagging criteria, where "x" is Organic_Carbon_to_Organic_Nitrogen_Ratio: x<0="I", x<0="Q", x>100="Q")
23	Sulfides	ug/L	floating-point	Concentration of hydrogen sulfide as ug-S/L
24	Chloride	mg/L	floating-point	Chloride concentration
25	Sulfate	mg/L	floating-point	Sulfate concentration
26	pH	none	floating-point	porewater pH
27	Salinity	ppt	floating-point	Salinity calculated from Chloride

Data Table: NUT-GCES-1608_SourceWater (Source water chemistry measurements, 20 records)

Access: Public (released 10-Sep-2016)

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

Data Formats: Spreadsheet (CSV) [3.40kb], Text File [2.64kb], MATLAB (GCE Toolbox) [37.67kb], MATLAB (Variables) [33.62kb], Text Report [34.62kb]

Column List:(display)

Column	Name	Units	Type	Description
1	Year	YYYY	integer	Year the sample was collected
2	Month	MM	integer	Month the sample was collected
3	Day	DD	integer	Day the sample was collected
4	Date	yyyy-mm-dd	string	Date the sample was collected
5	Treatment	none	string	Sample treatment
6	Replicate	none	integer	Replicate
7	Elevation	m	floating-point	Mean plot elevation relative to MLW
8	Dissolved_Reactive_Phosphorus	ug/L	floating-point	Dissolved reactive phosphorus (DRP) as ug-P/L
9	Flag_Dissolved_Reactive_Phosphorus	none	string	QA/QC flags for Dissolved reactive phosphorus (DRP) as ug-P/L (flagging criteria, where "x" is Dissolved_Reactive_Phosphorus: x<0="I", x<0="Q", x>1000="Q", manual)
10	Total_Phosphorus	ug/L	floating-point	Total phosphorus (TP) as ug-P/L
11	Flag_Total_Phosphorus	none	string	QA/QC flags for Total phosphorus (TP) as ug-P/L (flagging criteria, where "x" is Total_Phosphorus: x<0="I", x<0="Q", x>1000="Q", manual)
12	Ammonium	ug/L	floating-point	Ammonium-N (NH4) as ug-N/L
13	Flag_Ammonium	none	string	QA/QC flags for Ammonium-N (NH4) as ug-N/L (flagging criteria, where "x" is Ammonium: x<0="I", x<0="Q", x>5000="Q", manual)
14	Nitrate_Nitrite	ug/L	floating-point	Nitrate & nitrite (NO3 & NO2) as ug-N/L
15	Flag_Nitrate_Nitrite	none	string	QA/QC flags for Nitrate & nitrite (NO3 & NO2) as ug-N/L (flagging criteria, where "x" is Nitrate_Nitrite: x<0="I", x<0="Q", x>300="Q", manual)
16	Nitrite	ug/L	floating-point	Nitrite (NO2) as ug-N/L
17	Total_Nitrogen	ug/L	floating-point	Total nitrogen as ug-N/L
18	Flag_Total_Nitrogen	none	string	QA/QC flags for Total nitrogen as ug-N/L (flagging criteria, where "x" is Total_Nitrogen: x<0="I", x<0="Q", x>7500="Q", manual)
19	Organic_Nitrogen	ug/L	floating-point	Organic nitrogen as ug-N/L
20	Dissolved_Organic_Carbon	ug/L	floating-point	Dissolved organic carbon (DOC) as ug-C/L
21	Carbon_to_Nitrogen_Ratio	none	floating-point	Carbon to nitrogen (CN) ratio (mol:mol)
22	Organic_Carbon_to_Organic_Nitrogen_Ratio	none	floating-point	Organic carbon to organic nitrogen (OCON) ratio (mol:mol)
23	Sulfides	ug/L	floating-point	Concentration of hydrogen sulfide as ug-S/L
24	Chloride	mg/L	floating-point	Chloride concentration
25	Sulfate	mg/L	floating-point	Sulfate concentration
26	Flag_Sulfate	none	string	QA/QC flags for Sulfate concentration (flagging criteria, where "x" is Sulfate: x<0="I", x<0="Q", x>5000="Q")
27	pH	none	floating-point	porewater pH

Statistics:

Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS

Citation:

Craft, Christopher B. 2016. Porewater chemistry measurements from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx). Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/045ad069c3bf253d7bd81fdffc2f5664

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