Georgia Coastal Ecosystems LTER Data Set Details

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GCE-LTER Data Set Summary

Accession:

GIS-GCET-1810

Research Theme:

Geospatial Analysis (Research Study)

Contributors:

Christine Burns, Merryl Alber, Clark Alexander

Title:

Cross-site comparison of historical trends in marsh change at three LTER sites: GCE, VCR, and PIE.

Abstract:

The data provided here are shapefiles which were generated from digitizing historical maps and aerial photographs for a cross site comparison of changes in marshes at the Plum Island Ecosystem (PIE), Virginia Coast Reserve (VCR), and Georgia Coastal Ecosystems (GCE) Long Term Ecological Research (LTER) sites. This dataset includes shoreline shapefiles digitized for 3 time intervals at each site: 1930s/40s, 1950s/70s, and 2013 as well as a table of results from the shoreline change analysis. Centerlines for all the channels were generated from the shoreline shapefiles and are attributed with Strahler (1965) channel order and sinuosity. Additionally, this dataset includes shapefiles of important features (channels, upland, ponds, tidal flats) digitized for each of three sites at three time intervals.

DOI:

10.6073/pasta/345165bcab691edd1f9ab6a92935f65b

Key Words:

aerial imagery, AMBUR, cross-site analysis, geographic information systems, historical, imagery, LTER, marsh change, marshes, morphology, shoreline change

LTER Core Area:

Disturbance Patterns

Research Themes:

Geospatial Analysis, Geology

Study Period:

11-Nov-1938 to 01-Jan-2013

Study Sites:

GCE_Domain -- GCE Domain, Sapelo Island, Georgia
VCR -- Virginia Coast Reserve LTER, Virginia, USA
PIE -- Plum Island Ecosystem LTER, Massachusetts, USA

» Download Geographic Coverage: Google Earth

Publications:

Burns, C., Alexander, C.R. Jr. and Alber, M. 2020. Assessing long-term trends in lateral salt-marsh shoreline change along a U.S. East Coast latitudinal gradient. Journal of Coastal Research. 37(2):291-301. (DOI: 10.2112/JCOASTRES-D-19-00043.1)

Burns, C., Alber, M. and Alexander, C.R. Jr. 2020. Historical Changes in the Vegetated Area of Salt Marshes. Estuaries and Coasts. (DOI: https://doi.org/10.1007/s12237-020-00781-6)

Downloads:

Data Table: GIS-GCET-1810 (Main data table for data set GIS-GCET-1810, 4713 records)

Access: Public (released 09-Oct-2020)

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

Data Formats: Spreadsheet (CSV) [421.16kb], Text File [411.96kb], MATLAB (GCE Toolbox) [341.24kb], MATLAB (Variables) [342.20kb], Text Report [454.31kb]

Column List:(display)

Column	Name	Units	Type	Description
1	Site	none	string	LTER Study Site
2	Transect_ID	none	integer	Unique number for each transect that was cast in AMBUR
3	Start_X	meter	floating-point	Starting X coordinate of the transect
4	Start_Y	meter	floating-point	Starting Y coordinate of the transect
5	End_X	meter	floating-point	Ending X coordinate of the transect
6	End_Y	meter	floating-point	Ending Y coordinate of the transect
7	Early_Date	YYYY	integer	The date of the earliest shoreline digitized for this study
8	Last_Date	YYYY	integer	The date of the latest shoreline digitized for this study
9	EPR	m/yr	floating-point	End Point Rate of change
10	EPR_Error	m/yr	floating-point	Estimate of the combined errors of the three shorelines used in this study.
11	LRR_slope	m/yr	floating-point	Linear regression shoreline change rate
12	LRR_Rsquared	m/yr	floating-point	R-squared of linear regression shoreline change rate
13	Early_to_Middle	m/yr	floating-point	EPR rates between the first and middle shoreline
14	Early_to_End	m/yr	floating-point	EPR rate for full length study.
15	Middle_to_End	m/yr	floating-point	EPR rate from the middle shoreline to the last shoreline
16	Channel_Order	none	integer	Strahler channel order of the shoreline segment

Zip archive (ancillary data): GIS-GCET-1810-VCR (ESRI geodatabase with feature classess containing all of the data for the VCR)

Access: Public (released 09-Oct-2020)

Metadata: XML (Ecological Metadata Language)

Data Formats: Zip archive [6,303kb]

Zip archive (ancillary data): GIS-GCET-1810_GCE (ESRI geodatabase with feature classess containing all of the data for the GCE)

Access: Public (released 09-Oct-2020)

Metadata: XML (Ecological Metadata Language)

Data Formats: Zip archive [3,810kb]

Zip archive (ancillary data): GIS-GCET-1810_PIE (ESRI geodatabase with feature classess containing all of the data for the PIE)

Access: Public (released 09-Oct-2020)

Metadata: XML (Ecological Metadata Language)

Data Formats: Zip archive [8,747kb]

Statistics:

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

Citation:

Burns, Christine. 2018. Cross-site comparison of historical trends in marsh change at three LTER sites: GCE, VCR, and PIE. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/345165bcab691edd1f9ab6a92935f65b

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