CRED REA Reef Fish Assessment Survey at Ofu And Olosega Islands, American Samoa in 2008

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), 20100320, CRED REA Reef Fish Assessment Survey at Ofu And Olosega Islands, American Samoa in 2008.

   Online Links:

   • https://www.fisheries.noaa.gov/pacific-islands/ecosystems/coral-reefs-pacific

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -169.696867

   East_Bounding_Coordinate: -169.589923

   North_Bounding_Coordinate: -14.144999

   South_Bounding_Coordinate: -14.212963

3. What does it look like?
4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 28-Feb-2008

   Ending_Date: 04-Mar-2008

   Currentness_Reference: Ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: spreadsheet

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?
      
   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 0.0001. Longitudes are given to the nearest 0.0001. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is World Geodetic System 1984 (WGS84).
      The ellipsoid used is Geodetic Reference System 80 (GRS80).
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.2572236.
      

      Vertical_Coordinate_System_Definition:

      Depth_System_Definition:

      Depth_Datum_Name: Local surface

      Depth_Resolution: 1

      Depth_Distance_Units: meters

      Depth_Encoding_Method: Explicit Depth Coordinate Included with Horizontal Coordinates

7. How does the data set describe geographic features?

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
2. Who also contributed to the data set?

   "Marc Nadon, Paul Brown, Kevin O'Brien, Paula Ayotte", Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Sciences Center, National Marine Fisheries Service, NOAA

3. To whom should users address questions about the data?
   Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)

   Attn: Ivor Williams

   NOAA IRC

   Honolulu, HI
   

   USA

   808 725-5360 (voice)

   808 725-5429 (FAX)

   nmfs.pic.credinfo@noaa.gov

   Contact_Instructions: e-mail preferred

Why was the data set created?

Part of a long-term monitoring program at biennial intervals which documents the state of the reefs.

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: Unknown (process 1 of 1)

   REA surveys are investigations that provide a high degree of taxonomic resolution for coral, algae, other macroinvertebrate, and reef fish communities. The surveys were conducted using a combination of dive teams which generally included a two to three person fish team, a two person coral/coral disease team, and a combined team of two algae biologists and one macroinvertebrate biologist. The majority of REA surveys were conducted along the forereef slopes of individual islands at depths between 10 and 20 m. However, additional surveyed habitats included a lagoonal-type patch reef and offshore oceanic banks. During REA surveys, biological assessment teams follow highly structured protocols that are repeated at each REA site. Upon arrival at an REA site, three teams of divers enter the water over spaced time intervals. The fish team firstly enters the water and deploys a 25-m transect line. Two of the fish divers begin to survey along that transect while the remaining fish diver begins stationary point count assessments in the general vicinity. After approximately 20 min, the coral team enters the water and begins to work along the first transect line. By this time the fish team has deployed and begun surveys along a second 25-m transect. About 10 min later, the algal/invertebrate team enters the water and begins surveying the first transect. In total, the fish team surveys three transects at each site (transects 1, 2, and 3), and the coral and algal/invertebrate teams survey transects 1 and 2. The sampling effort takes between 60 and 80 min to complete. The selection of REA sites was made in close consultation with Coral Reef Advisory Group (CRAG) and local agencies. Factors considered during REA site selection included: (1) ensuring a range of sample sites representative of the benthic and reef fish habitats around each island; (2) selecting a mixture of sites within and outside of marine protected areas; (3) selecting a mixture of both 'impacted' and 'least impacted' sites; (4) selecting some sites adjacent to local villages, and (5) selecting a number of sites that could be compared to and complement previous assessment and monitoring work as well as future coral reef monitoring proposed by CRAG and local agencies. It is important to note that access to REA sites can be limited by wave exposure, weather conditions, and other environmental factors such as currents, which can affect the ability to resurvey sites between years. Transect placement was guided by: (1) a focus on hard-bottom communities; (2) deploying lines along an isobath to the extent possible at each site, and (3) laying the transect lines into the prevailing current.

3. What similar or related data should the user be aware of?

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

1. How well have the observations been checked?
   Observations at each site were made by three divers who are experts in fish taxonomy. The team of three REA fish divers rotated roles with two divers performing belt-transect surveys and one diver performing stationary point counts at each survey site. Observations were periodically checked during the expedition for consistency between divers, and little discrepancy was ever noted between divers. It should be noted, however, that this data set is quite large, and probably includes typographical or other errors that might be discovered at a future date.
2. How accurate are the geographic locations?
   GPS unit
3. How accurate are the heights or depths?
   Dive computer and SCUBA depth gauge
4. Where are the gaps in the data? What is missing?
   The survey sites were selected to be representative of the coral reef habitats at this reef system. Efforts were made to include broad spatial coverage of the reef area, but weather conditions or other environmental constraints may have precluded the team from surveying windward or exposed sites.
5. How consistent are the relationships among the observations, including topology?
   The same methods of data collection were used at each of the sites surveyed at this location, and were conducted by the same scientists. Periodic examination of the data through the duration of the trip showed no signs of diver bias or other discrepancies.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: Data are available two years following data collection date.

Use_Constraints:

Please cite CRED when using the data. Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration

1. Who distributes the data set? (Distributor 1 of 1)
   
   Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)

   Attn: CRED Data Management Team

   NOAA IRC

   Honolulu, HI
   

   USA

   808 725-5360 (voice)

   808 725-5429 (FAX)

   nmfs.pic.credinfo@noaa.gov

   Contact_Instructions: e-mail preferred

2. What's the catalog number I need to order this data set? Offline Data
3. What legal disclaimers am I supposed to read?

   While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	XLS (Microsoft Excel worksheet)
     Media you can order:	CDROM, or email (format ISO 9660)

   • Cost to order the data: None if receiving the data online

5. Is there some other way to get the data?

   Contact CRED data management team for information

6. What hardware or software do I need in order to use the data set?

   Contact CRED data management team for information

Who wrote the metadata?

Dates:

Last modified: 26-May-2019
Last Reviewed: 10-Sep-2009

Metadata author:

Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)

NOAA IRC

Honolulu, HI

USA

808 725-5360 (voice)

808 725-5429 (FAX)

nmfs.pic.credinfo@noaa.gov

Contact_Instructions: e-mail preferred

Metadata standard:

the Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)