CRED REA Algal Assessment, Agrihan 2003

Metadata also available as - [Outline]

Frequently-anticipated questions:

What does this data set describe?

Title: CRED REA Algal Assessment, Agrihan 2003
Abstract:
Twelve quadrats were sampled along 2 consecutively-placed, 25m transect lines as part of Rapid Ecological Assessments conducted at 6 sites at Agrihan in the Commonwealth of the Northern Mariana Islands in August and September, 2003 from the NOAA vessel Oscar Elton Sette (OES03-07). Raw survey data included genus presence and relative abundance, and voucher specimens. Detailed taxonomic analyses of voucher specimens are presented.
Supplemental_Information: Maximum depth was 15 meters.
  1. How should this data set be cited?

    Coral Reef Ecosystem Division (, NOAA Pacific Island Fisheries Scienc, 20060601, CRED REA Algal Assessment, Agrihan 2003.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 145.625762
    East_Bounding_Coordinate: 145.705743
    North_Bounding_Coordinate: 18.823275
    South_Bounding_Coordinate: 18.716814

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 27-Aug-2003
    Ending_Date: 06-Sep-2003
    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 Degrees and Decimal Minutes.

      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)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Coral Reef Ecosystem Division (CRED), NOAA Pacific Island Fisheries Sciences Center
    1125B Ala Moana Blvd.
    Honolulu, HI 96814
    U.S.A.

    670-664-8505 (voice)
    (808)983-3730 (FAX)

Why was the data set created?

Part of an initial assessment program in which corals, algae, fish, and other macroinvertebrates are co-sampled along the same set of transect lines.

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)
    A modified version of the Preskitt method was used to collect qualitative and quantitative algal data (Preskitt et al. 2004, Pacific Science). One diver recorded the presence and relative abundance of algal genera inside each of the twelve 0.18 m2 quadrats and collected voucher specimens, while the second diver photographed each quadrat. An additional random swim was performed by the divers to collect qualitative samples.

  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?

    Algal genera were identified in the field by trained phycologists.

  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 dominant habitats at this reef system.

  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 scientist.

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: Please cite CRED when using the data.

  1. Who distributes the data set? (Distributor 1 of 1)

    Coral Reef Ecosystem Division (CRED), NOAA Pacific Island Fisheries Sciences Center
    c/o Michael Parke
    1125B Ala Moana Blvd.
    Honolulu, HI 96814
    U.S.A.

    (808)983-3725 (voice)
    (808)983-3730 (FAX)
    Michael.Parke@noaa.gov

  2. What's the catalog number I need to order this data set?

  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?

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

    Contact CRED data management team for information

Who wrote the metadata?

Dates:
Last modified: 12-Aug-2008
Metadata author:
Coral Reef Ecosystem Division (CRED), NOAA Pacific Island Fisheries
c/o Haiying Wang
1125B Ala Moana Blvd.
Honolulu, HI 96814
U.S.A.

(808)983-3725 (voice)
(808)983-3730 (FAX)
Haiying.Wang@noaa.gov

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

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