Late Holocene and Living Coral Composition of Pompano Ridge, FL

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Frequently anticipated questions:

What does this data set describe?

Title: Late Holocene and Living Coral Composition of Pompano Ridge, FL
Pompano Ridge is a coral reef located on the southeast Florida nearshore ridge complex, ~600 meters (m) off the coast of northern Broward County in southeast Florida (26°13’ North, 80°5’ West). This data release compiles data collected on the late Holocene and living coral composition of Pompano Ridge. The data are described in detail in Modys and others (in prep). The samples were collected under Scientific Activity Licenses (SAL) from the Florida Fish and Wildlife Conservation Commission (SAL-18-1650(A)-SRP) and with permission from Broward County Environmental Protection & Growth Management.
  1. How might this data set be cited?
    Modys, Alexander B., Toth, Lauren T., Oleinik, Anton E., Precht, William F., and Mortlock, Richard A., 20240221, Late Holocene and Living Coral Composition of Pompano Ridge, FL:.

    This is part of the following larger work.

    Modys, Alexander B., Toth, Lauren T., Oleinik, Anton E., Precht, William F., and Mortlock, Richard A., 20240221, Late Holocene and Living Coral Composition of Pompano Ridge, FL: U.S. Geological Survey data release doi:10.5066/P9F0VW9L, U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -80.085800
    East_Bounding_Coordinate: -80.083660
    North_Bounding_Coordinate: 26.228900
    South_Bounding_Coordinate: 26.204856
    Description_of_Geographic_Extent: Pompano Ridge, Southeast Florida, USA
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 01-Jul-2018
    Ending_Date: 30-Sep-2019
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: tabular digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (544)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D WGS 1984.
      The ellipsoid used is WGS 1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.2572235.
      Depth_Datum_Name: Mean sea level
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values
  7. How does the data set describe geographic features?
    Late_Holocene_and_living_coral_composition_of_Pompano_Ridge_FL.csv, Late_Holocene_and_living_coral_composition_of_Pompano_Ridge_FL.xlsx
    Comma-separated values file (.csv) and Microsoft Excel file (.xlsx) on the absolute and relative abundance of Late Holocene and living corals in Pompano Ridge, FL. (Source: USGS)
    Time Period
    The time period of the corals counted at Pompano Ridge. (Source: USGS)
    Late HoloceneThe corals were dead, Late Holocene (4200 years before present to 1950 Common Era [CE]) subfossils when they were counted.
    LivingThe corals were alive when they were counted.
    A unique site identifier where Late Holocene and living corals were counted. (Source: USGS) The site identifier consists of an abbreviation of the location (Pompano Ridge [PR]), a site number (1-16), and the letter D (which indicates the site is primarily composed of dead corals), all separated by dashes.
    The latitude of the site (WGS 84). (Source: USGS)
    Range of values
    Units:Decimal degrees
    The longitude of the site (WGS 84). (Source: USGS)
    Range of values
    Units:Decimal degrees
    Depth (m)
    The depth of the site in meters (mean sea level). (Source: USGS)
    Range of values
    Units:Meters (m)
    The coral taxon identified at the site. (Source: USGS) The coral taxon identified. See Corals of the World database (
    The number of each coral taxa observed at each site. (Source: USGS)
    Range of values
    Relative Abundance
    The (percent) relative abundance of each taxon at each site. Calculated by dividing the counts of each taxon by the total counts of all taxa at each site and multiplying the resulting value by 100. (Source: USGS)
    Range of values

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Alexander B. Modys
    • Lauren T. Toth
    • Anton E. Oleinik
    • William F. Precht
    • Richard A. Mortlock
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Lauren T Toth
    U.S. Geological Survey, SOUTHEAST REGION
    Research Physical Scientist
    600 4Th Street South
    St. Petersburg, FL

    727-502-8029 (voice)
    727-502-8182 (FAX)

Why was the data set created?

The data were collected for a study (Modys and others, in prep) aimed at determining how late Holocene coral reefs at Pompano Ridge compared with living assemblages.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2018 (process 1 of 1)
    To determine the taxonomic composition of the late Holocene coral assemblages, surveys were conducted along 16 shore-parallel, line-intercept transects (60-m long) distributed haphazardly across the full extent of the coral rubble zone as determined by Self Contained Underwater Breathing Apparatus (SCUBA)-based ground-truthing and examination of high-resolution bathymetric data. Surficial coral rubble and dead massive colonies encountered every 5 centimeters (cm) were identified to the lowest taxonomic level recognizable without physically breaking them apart or removing algal and other encrusting overgrowths. Sub-surface coral rubble was also collected from 50-cm diameter pits excavated at a random point along each transect. Coral fragments were removed from each pit until a 2-liter mesh bag was filled (pit depths between 30 and 60 cm). Coral rubble from pit samples was also identified to the lowest taxonomic level and then pooled with data obtained from the line-point intercept transects. To determine how modern assemblages at our study site compare with the late Holocene assemblages within the study area at Pompano Ridge, live coral abundance data was collected along the same 16 transects in the summer of 2018 and the fall of 2019. For each transect, all living corals larger than 4 cm within a 1-m wide belt were identified to the species level and counted by SCUBA divers.
  3. What similar or related data should the user be aware of?
    Modys, Alexander B., Toth, Lauren T., Oelinik, Anton E., Precht, William F., and Mortlock, Richard A., in prep, Modern coral range expansion off southeast Florida falls short of late Holocene baseline: Nature Communications Earth and Environment (Springer Nature), UK.

    Online Links:

    • Unknown

    Walker, Mike, Johnsen, Sigfus, Rasmussen, Sune Olander, Popp, Trevor, Steffensen, Jørgen-Peder, Gibbard, Phil, Hoek, Wim, Lowe, John, Andrews, John, Björck, Svante, Cwynar, Les C., Hughen, Konrad, Kershaw, Peter, Kromer, Bernd, Litt, Thomas, Lowe, David J., Nakagawa, Takeshi, Newnham, Rewi, and Schwander, Jakob, 200901, Formal definition and dating of the GSSP (Global Stratotype Section and Point) for the base of the Holocene using the Greenland NGRIP ice core, and selected auxiliary records: Journal of Quaternary Science vol. 24, issue 1, Journal of Quaternary Science (Wiley), UK.

    Online Links:

    Other_Citation_Details: Pages 3-17

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    No formal attribute accuracy tests were conducted.
  2. How accurate are the geographic locations?
    No formal positional accuracy tests were conducted. The horizontal coordinates were collected in the World Geodetic System of 1984 (WGS 84) coordinate system.
  3. How accurate are the heights or depths?
    No formal positional accuracy tests were conducted. The vertical positions were collected in the mean sea level coordinate system, with a resolution of 0.1 meters.
  4. Where are the gaps in the data? What is missing?
    The data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical accuracy tests were conducted.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints None
Use_Constraints Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of the data in future products or derivative research.
  1. Who distributes the data set? (Distributor 1 of 1)
    Lauren T Toth
    U.S. Geological Survey, SOUTHEAST REGION
    Research Physical Scientist
    600 4Th Street South
    St. Petersburg, FL

    727-502-8029 (voice)
    727-502-8182 (FAX)
  2. What's the catalog number I need to order this data set? Late_Holocene_and_living_coral_composition_of_Pompano_Ridge_FL.csv, Late_Holocene_and_living_coral_composition_of_Pompano_Ridge_FL.xlsx
  3. What legal disclaimers am I supposed to read?
    Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government
  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 13-Mar-2024
Metadata author:
Lauren T Toth
U.S. Geological Survey, SOUTHEAST REGION
Research Physical Scientist
600 4Th Street South
St. Petersburg, FL

727-502-8029 (voice)
727-502-8182 (FAX)
Metadata standard:
FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata (FGDC-STD-001.1-1999)

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