Georgia Coastal Ecosystems LTER Data Set Details

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GCE-LTER Data Set Summary

Accession:

NUT-GCES-1609

Research Theme:

General Nutrient Chemistry (Directed Study)

Contributors:

Christopher B. Craft, Ellen Herbert, Nate Barnett, Sarah Widney, Dontrece Smith

Title:

Baseline soil chemistry data measurements from the GCE-LTER Seawater Addition Long-Term Experiment (SALTEx)

Abstract:

SALTEx (Seawater Addition Long-Term Experiment) is a 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. Soils were destructively sampled before the beginning of the experiment (March 2014) and after approximately 3 years of treatments (December 2016) and analyzed for bulk density, percent carbon, percent nitrogen, total phosphorus, available phosphorus, available nitrate, and available ammonium.

DOI:

10.6073/pasta/8162944e1543fc592bc9022dd4dcfeba

Key Words:

ammonia, carbon, chemistry, nitrate, nitrogen, nutrients, phosphorus, soils

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

Study Period:

26-Mar-2014 to 14-Dec-2016

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 Bulk density protocol (Georgia Coastal Ecosystems LTER)

SALTEx Map Plot Layout (Georgia Coastal Ecosystems LTER)

SALTEx - CHN Anaysis (Georgia Coastal Ecosystems LTER)

SALTEx - Labile Phosphorus Extraction (Georgia Coastal Ecosystems LTER)

SALTEx - Nitrogen Fractionation in Soils (Georgia Coastal Ecosystems LTER)

SALTEx - Ammonia Analysis (Georgia Coastal Ecosystems LTER)

SALTEx - Total Phosphorus (Georgia Coastal Ecosystems LTER)

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.

Solohin, E., Widney, S. and Craft, C.B. 2020. Declines in plant productivity drive loss of soil elevation in a tidal freshwater marsh exposed to saltwater intrusion. Ecology. 101(12):13. (DOI: 10.1002/ecy.3148)

Downloads:

Data Table: NUT-GCES-1609 (Main data table for data set NUT-GCES-1609, 183 records)

Access: Public (released 10-Sep-2016)

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

Data Formats: Spreadsheet (CSV) [14.63kb], Text File [13.91kb], MATLAB (GCE Toolbox) [174.49kb], MATLAB (Variables) [NaNkb], Text Report [34.09kb]

Column List:(hide)

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	Sample_depth	none	string	Depth interval of sample
9	Bulk_density	g/cm3	floating-point	Bulk density of sample
10	Percent_Carbon	%	floating-point	Percent carbon (by weight) of sample
11	Percent_Nitrogen	%	floating-point	Percent nitrogen (by weight) of sample
12	Available_Ammonium	µg/g	floating-point	Available ammonium-N as ug-N/g soil
13	Available Nitrate	µg/g	floating-point	Available nitrate-N as ug-N/g soil
14	Available Phosphate	µg/g	floating-point	Available phosphate as ug-P/g soil
15	Total_Phosphorus	µg/g	floating-point	Total phosphorus as ug-P/g soil

Statistics:

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

Citation:

Craft, Christopher B. 2016. Baseline soil chemistry data 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/8162944e1543fc592bc9022dd4dcfeba

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