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Accession: PLT-GCED-2207 Research Theme: Plant Ecology (Directed Study)
Contributors: Steven C. Pennings, Hongyu Guo
Title: Critical slowing down: vegetation height, cover and composition assess resilience of tidal fresh, brackish and salt marshes following experimental disturbance at twelve sites across the estuarine landscape
Abstract: We investigated the relative recovery rates of vegetation cover, vegetation height and community composition over a period of >10 years after experimental disturbance in 12 tidal marshes (two oligohaline, three mesohaline and seven polyhaline sites) across the estuarine landscape on the coast of Georgia, USA. Vegetation was removed from three by three meter plots (four per site) with herbicide in 2006 followed by repeated clipping through 2009. Vegetation height, cover and composition was assessed in experimental and control plots (4 of each per site) from 2010 to 2020. The goal of the study was to assess how quickly the sites recovered from disturbance, how this varied in different types of marshes, and how results varied depending on whether recovery was assessed by vegetation height, cover or composition.
DOI: 10.6073/pasta/6df40a30859a7293db9a76fc4fff8cec
Key Words: Altamaha Sound, disturbance, Doboy Sound, marshes, plant cover, plant ecology, plants, recovery, Sapelo Sound, succession, yearly
LTER Core Area: Other Site Research
Research Themes: Plant Ecology
Study Period: 01-Oct-2010 to 01-Nov-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
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Data Table: PLT-GCED-2207_salinity (Soil porewater salinity and flooding intensity of each study site, 132 records)

Access: Public (released 20-Jul-2022)

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

Data Formats: Spreadsheet (CSV) [6.67kb],  Text File [5.91kb],  MATLAB (GCE Toolbox) [38.23kb],  MATLAB (Variables) [56.84kb],  Text Report [80.43kb]

Column List:(display)


Data Table: PLT-GCED-2207_vegetation (Vegetation recovery data, 1104 records)

Access: Public (released 20-Jul-2022)

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

Data Formats: Spreadsheet (CSV) [120.55kb],  Text File [115.94kb],  MATLAB (GCE Toolbox) [47.52kb],  MATLAB (Variables) [66.86kb],  Text Report [200.20kb]

Column List:(display)

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Citation: Pennings, Steven C. 2022. Critical slowing down: vegetation height, cover and composition assess resilience of tidal fresh, brackish and salt marshes following experimental disturbance at twelve sites across the estuarine landscape. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. http://dx.doi.org/10.6073/pasta/6df40a30859a7293db9a76fc4fff8cec

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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.