What Happens After Phragmites is Killed: A Retrospective Analysis

This database contains nine spreadsheets titled: “2011_TMON_All.csv,” “2014_TMON_All.csv,” “2020_TMON_All.csv,” “Historical_Covers.csv,” “Modern_Covers_01.csv,” “Modern_Sommes.csv,” “Modern_Sommes_PresAbs.csv,” “Combined_HistModern.csv,” and “Chi_Comparison.csv.” There are also two R code files titled: “Management_Analysis_Dataverse” and “Monitored_Analysis_Dataverse.” Both R code files were compiled in R version 4.2.1 (2022-06-23 ucrt) -- "Funny-Looking Kid.” Together, the three files “2011_TMON_All.csv,” “2014_TMON_All.csv,” and “2020_TMON_All.csv,” serve as the raw data compiled together in the R code file “Monitored_Analysis_Dataverse” for the Monitored dataset described in the publication. Metadata for the included nine spreadsheets is below: Historical_Covers.csv - Historical cover classes of the species listed in this dataset were extracted from McCormick and Somes (1982) classification of plant communities in the 1972 Maryland Wetland Maps (https://geodata.md.gov/imap/rest/services/Hydrology/MD_WetlandMaps1972/MapServer). The maps provided codes for the wetland plant communities present at the sites based on interpretation of natural-color stereoscopic aerial photographs. The plant communities were verified by field-sampling. Column 1 – Site: Unique site-plot identification code Column 2 – Code: Community code assigned by McCormick and Somes (1982, see citation and access information below) Column 3 – Dominants: Four-letter codes for dominant species present in the plant communities, per the community codes assigned by McCormick and Somes (1982) Column 4 – Treatment: Indicates whether plot was under Short-Term or Continuous Management Columns 5-15: Column names are four-letter species codes for species present at each unique site-plot combination. A value of 1 in a cell indicates that the species was present in McCormick and Somes’ (1982) dataset, and a missing value indicates that the species was not present in the 1982 dataset. Modern_Covers.csv - Modern cover classes of species were sampled between September and October 2022 from 32 individual tidal wetland sites where Phragmites australis had been treated using herbicides. Column 1 – Site: Unique site-plot identification code Column 2 – Treatment: Indicates whether plot was under Short-Term or Continuous Management Column 3 – Phrag_Cover: Phragmites australis cover class as defined by the Braun-Blanquet method. Column 4 – Spp_Rich: Number of species present in the unique site-plot. Columns 5-37: Column names are four-letter species codes for species present at each unique site-plot combination. The number present in the cell indicates the species’ cover class, as defined by the Braun-Blanquet method (1 = trace, 2 = 1-5%, 3 = 5-25%, 4 = 25-50%, 5 = 50-75%, 6 = 75-100%), in the unique site-plot. Modern_Somes.csv - Modern cover classes of species were sampled between September and October 2022 from 32 individual tidal wetland sites where Phragmites australis had been treated using herbicides. Column 1 – Site: Unique site-plot identification code Column 2 – Treatment: Indicates whether plot was under Short-Term or Continuous Management Columns 3-13: Column names are four-letter species codes for species present at each unique site-plot combination. The modern species present are constrained to only the species described in McCormick and Somes’ (1982) community codes. The number present in the cell indicates the species’ cover class, as defined by the Braun-Blanquet method (1 = trace, 2 = 1-5%, 3 = 5-25%, 4 = 25-50%, 5 = 50-75%, 6 = 75-100%), in the unique site-plot. Modern_Somes_PresAbs.csv - Modern cover classes of species were sampled between September and October 2022 from 32 individual tidal wetland sites where Phragmites australis had been treated using herbicides. Column 1 – Site: Unique site-plot identification code Column 2 – Treatment: Indicates whether plot was under Short-Term or Continuous Management Columns 3-13: Column names are four-letter species codes for species present at each unique site-plot combination. The modern species present are constrained to only the species described in McCormick and Somes’ (1982) community codes. A value of 1 in a cell indicates that the species was present in the 2022 survey, and a missing value indicates that the species was not present. Combined_HistModern.csv - Historical cover classes for the species listed in this dataset were extracted from McCormick and Somes (1982) classification of plant communities in the 1972 Maryland Wetland Maps (https://geodata.md.gov/imap/rest/services/Hydrology/MD_WetlandMaps1972/MapServer). The maps provided codes for the wetland plant communities present at the sites based on interpretation of natural-color stereoscopic aerial photographs. The plant communities were verified by field-sampling. Modern cover classes of species were sampled between September and October 2022 from 32 individual tidal wetland sites where Phragmites australis had been treated using...