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Throw trap and electrofishing data collected during 1996–2022 from the Everglades, Florida, United States for the publication "Hydrology-mediated ecological function of a large wetland threatened by an invasive predator"


At a Glance


(Zip file containing 2 files)

Authors: Matthew Pintar, Nathan Dorn, Jeffrey Kline, Joel Trexler
Time period: 1996-01-01 to 2022-12-31
Package id: knb-lter-fce.1251.2

How to cite:
Pintar, M., N. Dorn, J. Kline, J. Trexler. 2022. Throw trap and electrofishing data collected during 1996–2022 from the Everglades, Florida, United States for the publication "Hydrology-mediated ecological function of a large wetland threatened by an invasive predator". Environmental Data Initiative. https://doi.org/10.6073/pasta/70379cfaa3572272bfd5e6e7d0d7840c. Dataset accessed 2024-02-27.

Geographic Coverage
This data set contains the following files.

Pintar-et-al_STOTEN_swamp-eels_data
Dataset associated with the publication: Pintar, M.R., N.J. Dorn, J.L. Kline, and J.C. Trexler. Hydrology-mediated ecological function of a large wetland threatened by an invasive predator. Science of the Total Environment.
Attribute table details     Download

Pintar-et-al-STOTEN_script
R code to replicate the analyses performed in the manuscript
Attribute table details     Download



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Detailed Metadata


  • Dataset Abstract
    Asian swamp eels (Monopterus albus/javanensis complex) were first reported from Florida in 1997 and the Everglades in 2007; swamp eels have been established in Taylor Slough of Everglades National Park since 2014. This dataset incorporates plot-level mean densities (# of individuals per square meter) of common aquatic animals collected during 1996–2022 from 24 sites across four regions of the Everglades: Taylor Slough, Shark River Slough, Water Conservation Area 3, and the C-111 Panhandle. Prey species included are the six most common small fishes prior to swamp eel invasion of Taylor Slough (1996–2009) and the three common decapod species (two crayfish species and grass shrimp). An annual index of mean wet season electrofishing catch-per-unit-effort of swamp eels, Mayan cichlids (Mayaheros uruphthalmus), and the three other large 'top predator' fishes (Amia calva, Lepisosteus platyrhincus, Micropterus salmoides) is included for plots where electrofishing was performed from 1997-2021. Hydrologic measures used in analyses are included.
  • Geographic Coverage
    Bounding Coordinates
    Dataset covers long-term monitoring sites in four regions of the Florida Everglades: Shark River Slough, Taylor Slough, Panhandle, and Water Conservation Area 3.
    N: 26.25, S: 25.22, E: -80.45, W: -80.95

  • Attributes
    • Data Table:   Dataset associated with the publication: Pintar, M.R., N.J. Dorn, J.L. Kline, and J.C. Trexler. Hydrology-mediated ecological function of a large wetland threatened by an invasive predator. Science of the Total Environment.
      Attribute Name:
      REGION
      Attribute Label:
      REGION
      Attribute Definition:
      one of the four regions of the Everglades for this project
      Storage Type:
      string
      Measurement Scale:
      PHD= C-111 Panhandle region
      SRS= Shark River Slough
      TSL= Taylor Slough
      WCA= Water Conservation Area 3
      Missing Value Code:
       

      Attribute Name:
      SITE
      Attribute Label:
      SITE
      Attribute Definition:
      Identifier for each site within a region
      Storage Type:
      string
      Measurement Scale:
      Identifier for each site within a region
      Missing Value Code:
       

      Attribute Name:
      PLOT
      Attribute Label:
      PLOT
      Attribute Definition:
      identifier for each plot within a site
      Storage Type:
      string
      Measurement Scale:
      A= plot A
      B= plot B
      C= plot C
      D= plot D
      E= plot E
      Missing Value Code:
       

      Attribute Name:
      CUM
      Attribute Label:
      CUM
      Attribute Definition:
      Cumulative sampling period of the project
      Storage Type:
      float
      Measurement Scale:
      Units: number
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      YEAR
      Attribute Label:
      YEAR
      Attribute Definition:
      Year of sampling
      Storage Type:
      float
      Measurement Scale:
      Units: nominalYear
      Number Type: integer
      Missing Value Code:
       

      Attribute Name:
      PERIOD
      Attribute Label:
      PERIOD
      Attribute Definition:
      sampling period within a year
      Storage Type:
      string
      Measurement Scale:
      1= February
      2= April
      3= July
      4= October
      5= December
      Missing Value Code:
       

      Attribute Name:
      THROW
      Attribute Label:
      THROW
      Attribute Definition:
      number of throw trap samples collected from each plot during that sampling period
      Storage Type:
      float
      Measurement Scale:
      Units: number
      Number Type: integer
      Missing Value Code:
       

      Attribute Name:
      FUNCHR
      Attribute Label:
      FUNCHR
      Attribute Definition:
      mean plot-level densities of Fundulus chrysotus
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      FUNCON
      Attribute Label:
      FUNCON
      Attribute Definition:
      mean plot-level densities of Fundulus confluentus
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      GAMHOL
      Attribute Label:
      GAMHOL
      Attribute Definition:
      mean plot-level densities of Gambusia holbrooki
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      HETFOR
      Attribute Label:
      HETFOR
      Attribute Definition:
      mean plot-level densities of Heterandria formosa
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      JORFLO
      Attribute Label:
      JORFLO
      Attribute Definition:
      mean plot-level densities of Jordanella floridae
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      LUCGOO
      Attribute Label:
      LUCGOO
      Attribute Definition:
      mean plot-level densities of Lucania goodei
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      MONALB
      Attribute Label:
      MONALB
      Attribute Definition:
      mean plot-level densities of Monopterus albus/javanensis caught in throw traps
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      PROALL
      Attribute Label:
      PROALL
      Attribute Definition:
      mean plot-level densities of Procambarus alleni
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      PROFAL
      Attribute Label:
      PROFAL
      Attribute Definition:
      mean plot-level densities of Procamabarus fallax
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      PROSPP
      Attribute Label:
      PROSPP
      Attribute Definition:
      mean plot-level densities of unidentified crayfish (Procambarus species)
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      PALPAL
      Attribute Label:
      PALPAL
      Attribute Definition:
      mean plot-level densities of Palaemonetes paludosus
      Storage Type:
      float
      Measurement Scale:
      Units: # / square meter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      DEPTH_AVE_30DAY
      Attribute Label:
      DEPTH_AVE_30DAY
      Attribute Definition:
      average water depth over the previous 30 days
      Storage Type:
      float
      Measurement Scale:
      Units: centimeter
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      DEPTH_AVE_180DAY
      Attribute Label:
      DEPTH_AVE_180DAY
      Attribute Definition:
      average water depth over the previous 180 days
      Storage Type:
      float
      Measurement Scale:
      Units: no data
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      DSLDD
      Attribute Label:
      DSLDD
      Attribute Definition:
      days since a plot was last dry (depth < 5 cm)
      Storage Type:
      float
      Measurement Scale:
      Units: days
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      LASTDAYDRY
      Attribute Label:
      LASTDAYDRY
      Attribute Definition:
      number of days a plot was dry the last time it dried (depth < 5 cm)
      Storage Type:
      float
      Measurement Scale:
      Units: days
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      TRANSECT
      Attribute Label:
      TRANSECT
      Attribute Definition:
      number of 5-minute electrofishing transects performed at that plot during that water year's wet season
      Storage Type:
      float
      Measurement Scale:
      Units: number
      Number Type: real
      Missing Value Code:
      NA (no data)

      Attribute Name:
      E.AMICAL
      Attribute Label:
      E.AMICAL
      Attribute Definition:
      annual index of electrofishing CPUE of Amia calva
      Storage Type:
      float
      Measurement Scale:
      Units: # / 5-minute transect
      Number Type: real
      Missing Value Code:
      NA (no electrofishing data exist for this sample)

      Attribute Name:
      E.CICURO
      Attribute Label:
      E.CICURO
      Attribute Definition:
      annual index of electrofishing CPUE of Cichlasoma urophthalmus (Mayaheros uruphthalmus)
      Storage Type:
      float
      Measurement Scale:
      Units: # / 5-minute transect
      Number Type: real
      Missing Value Code:
      NA (no electrofishing data exist for this sample)

      Attribute Name:
      E.LEPPLA
      Attribute Label:
      E.LEPPLA
      Attribute Definition:
      annual index of electrofishing CPUE of Lepisosteus platyrhincus
      Storage Type:
      float
      Measurement Scale:
      Units: # / 5-minute transect
      Number Type: real
      Missing Value Code:
      NA (no electrofishing data exist for this sample)

      Attribute Name:
      E.MICSAL
      Attribute Label:
      E.MICSAL
      Attribute Definition:
      annual index of electrofishing CPUE of Micropterus salmoides
      Storage Type:
      float
      Measurement Scale:
      Units: # / 5-minute transect
      Number Type: real
      Missing Value Code:
      NA (no electrofishing data exist for this sample)

      Attribute Name:
      E.MONALB
      Attribute Label:
      E.MONALB
      Attribute Definition:
      annual index of electrofishing CPUE of Monopterus albus/javanensis
      Storage Type:
      float
      Measurement Scale:
      Units: # / 5-minute transect
      Number Type: real
      Missing Value Code:
      NA (no electrofishing data exist for this sample)

      Attribute Name:
      REGSITE
      Attribute Label:
      REGSITE
      Attribute Definition:
      identifier combining REGION+SITE
      Storage Type:
      string
      Measurement Scale:
      identifier combining REGION+SITE
      Missing Value Code:
       

      Attribute Name:
      SITEPLOT
      Attribute Label:
      SITEPLOT
      Attribute Definition:
      identifier combining REGSITE + PLOT
      Storage Type:
      string
      Measurement Scale:
      identifier combining REGSITE + PLOT
      Missing Value Code:
       


  • Methods
    Method Step

    Description
    Detailed methods are described in the associated manuscript (Hydrology-mediated ecological function of a large wetland threatened by an invasive predator) and publications cited within. Long-term monitoring sites were established across the Everglades as part of the Modified Water Deliveries to Everglades National Park project. From July 1996 through February 2022 fish and invertebrates were collected using 1-square meter, 2-mm mesh, throw traps following standardized protocols at three sites in Taylor Slough; sampling also occurs in Shark River Slough, Water Conservation Area 3, and the C-111 Panhandle regions. The southernmost, longest hydroperiod site (CP) in Taylor Slough consisted of three 1-ha plots, while the upstream sites (TS, MD) consisted of five plots per site with two of the five plots having shorter hydroperiods. Seven throw-trap samples were collected at each plot during each sampling period except when sites were only accessible by helicopter and five throw-trap samples were collected; our analyses here are on plot-level mean densities of small fishes and decapods. Samples were collected during five months of each year, starting after the onset of the wet season (begins in June), with wet-season samples collected in July and October, transition period samples collected in December, and dry-season samples collected in February and April. Animals were removed from throw traps following a standard protocol using bar seines and dip nets; vertebrates were euthanized using MS-222 and all animals were fixed in formalin before being transferred to ethanol and identified. From 1997–2021, the nine central/deeper plots in Taylor Slough were sampled with an airboat-mounted electrofisher for three transects of five minutes (pedal time) to assess large fishes (>8 cm standard length) providing catch-per-unit-effort (CPUE) relative abundance values. Native fishes were released and non-native fishes were euthanized following each electrofishing transect. Electrofishing CPUE data were used to assess predator effects in supporting analyses. This electrofishing dataset included only nine plots in Taylor Slough because four of the thirteen plots in Taylor Slough were not sampled by electrofishing, while dry-season electrofishing sampling is limited most years because airboats cannot access sites (throw-trap sampling continues when accessed by helicopter). To partially overcome limitations of missing dry-season sampling, we created indices of annual predator CPUE caught via electrofishing by averaging the total number of fish caught across all electrofishing transects during both wet-season sampling periods (July, October).


  • Distribution and Intellectual Rights
    Online distribution
    https://pasta.lternet.edu/package/data/eml/knb-lter-fce/1251/2/16b7e54d5ea898f4403b38a9ecdf1251
    Intellectual Rights
    This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

  • Keywords
    crayfish, Everglades, ecosystem restoration, small fish, swamp eels, invasive species
  • Data Table and Format
    Data Table:  Dataset associated with the publication: Pintar, M.R., N.J. Dorn, J.L. Kline, and J.C. Trexler. Hydrology-mediated ecological function of a large wetland threatened by an invasive predator. Science of the Total Environment.

    Entity Name:
    Pintar-et-al_STOTEN_swamp-eels_data
    Entity Description:
    Dataset associated with the publication: Pintar, M.R., N.J. Dorn, J.L. Kline, and J.C. Trexler. Hydrology-mediated ecological function of a large wetland threatened by an invasive predator. Science of the Total Environment.
    Object Name:
    Pintar-et-al_STOTEN_swamp-eels_data.csv
    Number of Header Lines:
    1
    Attribute Orientation:
    column
    Field Delimiter:
    ,
    Number of Records:
    7867