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GCE-LTER Data Set Summary

Accession: MSH-GCED-2308 Research Theme: Marsh Ecology (Directed Study)
Contributors: Marc Simon Hensel, Merryl Alber, Christine Angelini, Rebecca Atkins, Jeb Byers, Chris Craft, David de la Mater, Joe Morton, Steve Pennings, Emlyn Resetarits, Brian Silliman, Stephanie Valdez, Carter Smith
Title: Pred-Ex: Long Term Salt Marsh Predator Exclusion Experiment Conducted at Sapelo Island, GA
Abstract: In southeastern USA salt marshes, short-term and small-scale experiments indicate that a trophic cascade benefits the foundation plant Spartina alterniflora: marine predators (nekton) positively affect plant biomass by consuming snail and crab herbivores. To test how nekton affect marsh processes when the entire animal community is present, and to test how prior results scale up over time, we conducted a 3-year predator exclusion experiment in a Georgia salt marsh using replicated 19.6 m2 plots. We measured the response of changing density for all marsh invertebrates, conducted snail and crab tethering trials, quantified change in marsh grass biomass, and measured tea bag decomposition rate across all plots.
DOI: 10.6073/pasta/a2c9c9b9541c511c3e4bfab5e8e4d639
Key Words: community structure, consumers, Dean Creek, decomposition, GCE, LTER, nekton, predation, Sapelo Island
LTER Core Area: Primary Production
Research Themes: Marsh Ecology
Study Period: 01-May-2016 to 01-Oct-2019
Study Sites:
GCE6 -- Dean Creek, Sapelo Island, Georgia, USA
» Download Geographic Coverage: Google Earth
Species References: Chthamalus fragilis, Uca pugilator
Downloads: Information

Data Table: MSH-GCED-2308_Experiment (Experimental data from PredEx, 96 records)

Access: Public (released 22-Aug-2023)

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

Data Formats: Spreadsheet (CSV) [7.26kb],  Text File [6.50kb],  MATLAB (GCE Toolbox) [32.46kb],  MATLAB (Variables) [35.11kb],  Text Report [37.63kb]

Column List:(display)


Supporting Document: MSH-GCED-2308_Map (Zip archive containing a map of the study plots)

Access: Public (released 22-Aug-2023)

Metadata: XML (Ecological Metadata Language)

Data Formats: Zip archive [846 kb]


Data Table: MSH-GCED-2308_TeaDecomp (Tea bag decomposition data from PredEx, 954 records)

Access: Public (released 22-Aug-2023)

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

Data Formats: Spreadsheet (CSV) [66.72kb],  Text File [62.53kb],  MATLAB (GCE Toolbox) [48.66kb],  MATLAB (Variables) [50.04kb],  Text Report [94.00kb]

Column List:(display)


Data Table: MSH-GCED-2308_Tether (Tether data from PredEx, 182 records)

Access: Public (released 22-Aug-2023)

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

Data Formats: Spreadsheet (CSV) [10.47kb],  Text File [8.96kb],  MATLAB (GCE Toolbox) [29.67kb],  MATLAB (Variables) [31.58kb],  Text Report [37.38kb]

Column List:(display)

Statistics: Generate script code to retrieve data tables for analysis in: MATLAB, R, SAS, SPSS
Citation: Hensel, Marc Simon. 2023. Pred-Ex: Long Term Salt Marsh Predator Exclusion Experiment Conducted at Sapelo Island, GA. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/a2c9c9b9541c511c3e4bfab5e8e4d639

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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.