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GCE-LTER Data Set Summary

Accession: PLT-GCEM-1801 Research Theme: Plant Ecology (Monitoring)
Contributor: Steven C. Pennings
Title: Disturbance to permanent monitoring plots at GCE sites 1-10, from 2001 to 2020.
Abstract: We established permanent vegetation monitoring plots in creekbank and midmarsh at GCE sites 1-10 in 2000. A dedicated Juncus zone was later added at sites 10 and 9. Starting in 2001, when we recorded plant sizes, we also noted any disturbance to the plots. Plots were scored as normal (no visible disturbance), disturbed by wrack (wrack present in plots and stems dead or broken), disturbed by snails (>100 Littoraria per square meter and plant biomass low), disturbed by pigs (animal trail through the plot, this mostly happened at site 8 mid-marsh), initial slump (plot at the creekbank sliding into the creek based on movement of pvc poles or formation of a crevasse), and terminal slump (plot had slid far enough down that vegetation had drowned). Plots that experienced terminal slump or could not be found for any reason were scored as lost. Lost plots were replaced with a new plot in the same general area with the plot code incremented by 10. For example if plot 3 was lost, it was replaced by 13, and then in turn by 23.
DOI: 10.6073/pasta/f861c5ed6fd60d73f0378aa8cfa48f6c
Key Words: disturbance, geomorphology, Juncus, Littoraria, Spartina, wrack, Zizaniopsis
LTER Core Area: Disturbance Patterns
Research Themes: Plant Ecology
Study Period: 01-Oct-2001 to 31-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
GCE11 -- Tidal Forest, Georgia, USA
» Download Geographic Coverage: Google Earth
Species References: Juncus roemerianus, Littoraria irrorata, Spartina alterniflora, Zizaniopsis miliacea
Data References: PLT-IRMA-2002a (Disturbance data from quarterly sampling in 2018)
Publications:

Li, S. and Pennings, S.C. 2016. Disturbance in Georgia salt marshes: variation across space and time. Ecosphere. 7(10):e01487. (DOI: 10.1002/ecs2.1487)

Downloads: Information

Data Table: PLT-GCEM-1801 (Main data table for data set PLT-GCEM-1801, 3453 records)

Access: Public (released 01-Oct-2017)

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

Data Formats: Spreadsheet (CSV) [299.71kb],  Text File [254.80kb],  MATLAB (GCE Toolbox) [130.46kb],  MATLAB (Variables) [134.98kb],  Text Report [381.73kb]

Column List:(hide)

Column Name Units Type Description
1 Year YYYY integer Year of observation
2 Month MM integer Month of Observation
3 Day DD integer Day of observation
4 Site none integer GCE LTER sampling site
5 Zone none integer Nominal marsh zone
6 Plot none integer Permanent 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 Condition none string Condition of permanent plot
15 Observation none string Observation of any disturbances in the permanent plot
16 Replacement none integer Plot number of the replacement plot
17 Notes none string Notes from the field logs
Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Pennings, Steven C. 2017. Disturbance to permanent monitoring plots at GCE sites 1-10, from 2001 to 2020. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/f861c5ed6fd60d73f0378aa8cfa48f6c

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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.