Hawaii Coral Reef Assessment and Monitoring Program (CRAMP): Benthic Data from Rapid Assessment Transects 2001-2004 (NODC Accession 0002464)

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Frequently anticipated questions:

What does this data set describe?

Hawaii Coral Reef Assessment and Monitoring Program (CRAMP): Benthic Data from Rapid Assessment Transects 2001-2004 (NODC Accession 0002464)
This dataset consists of CRAMP Rapid Assessment Transect surveys taken in 2001-2004 and includes quantitative estimates of substrate type and species. The types and coverages were derived objectively from photographic images using PhotoGrid, a software package which analyzes random points on images of coral reefs and substrate. This dataset does not include the images from the transects, which have been provided to NOAA separately.

In 2002, there were 57 lines surveyed at 28 sites. Due to funding cuts, the number of surveys dropped to 8 in 2003 and 5 in 2004. Surveys typically consist of shallow (~3m) and deep (~10m) lines. This dataset contains surveys from 20 sites.

Sensor_Name digital camera Source_Name SCUBA Project_Campaign: Coral Reef Assessment and Monitoring Program (CRAMP) Originating_Center Hawaii Institute of Marine Biology Storage_Medium MS Excel and ASCII CSV Reference NoneOnline_size: 16142 kilobytes
  1. How should this data set be cited?

    Jokiel, Dr. Paul , Rodgers, Dr. Kuulei , Brown, Mr. Eric , Hawaii Institute of Marine Biology, Oceanography, Department Of , School of Ocean and Earth Science and Technology, and Hawaii, University Of , Unknown, Hawaii Coral Reef Assessment and Monitoring Program (CRAMP): Benthic Data from Rapid Assessment Transects 2001-2004 (NODC Accession 0002464).

    Online Links:

    • https://data.nodc.noaa.gov/accession/0002464

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -160.228
    East_Bounding_Coordinate: -155.033
    North_Bounding_Coordinate: 22.015
    South_Bounding_Coordinate: 19.425

  3. What does it look like?

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

    Beginning_Date: 29-Apr-2001
    Ending_Date: 28-Oct-2004
    Currentness_Reference: ground condition

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

  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?

  7. How does the data set describe geographic features?

    Original data received as CSV (ASCII) files, which are derived from output of PhotoGrid for all surveyed lines. Multiple sites are given in directory ../../data. Only Waikiki sites are given in directory ../../data/waikiki2002.

    1. Files in ../../data (multiple sites) Filename template:


    where: SSS: site ID (see STATIONS above) yyyymmdd: survey date

    Fields in these files: Site Name - usually NA (not available) Station - usually NA Frame No - usually NA Image Date - usually NA, get survey (image) date from filename ID Name - equivalent to TaxonName in PointCount99, this is the species recorded but for some organisms if not identifiable to the species or even genus level then just to taxanomic level ID Code - usually NA

    The following are PhotoGrid parameters equivalent to PointCount parameters of the same name. Point - Point number on the frame X - X coordinate on the image for each point Y - Y coordinate on the image for each point Intensity - value for the point Red - RGB value on the image Green - RGB value on the image Blue - RGB value on the image

    Notes from Kuulei Rodgers concerning these paramters: "Point X and Y are the coordinates for each of the 50 points that are generated on an image. This way if you want to go back and check if it is correct or what someone called some organism it will regenerate the frame with the random points that were originally used. If for example you see Pavona maldivensis and want to see if that is correct because you don't think it is at that site and may have been interpreted, you can go back and look at point number 7 to see what is under it. The program will use the coordinates to reconstruct the original random points on that frame. Red, Green and Blue are just the exact colors as the person who first did the analysis saw it. Since you can adjust the color balance and the contrast, the program saves the adjustments so it can be revisited if need be later."

    Filename - this is a critical parameter. It is the name of the image file. Convention is yyIISSSDDmTTFFF, yy : last two digits of year II : island SSS : site (see STATIONS above) DDm : depth in meters TT : transect number FFF : frame number

    The remaining parameters can be ignored and are usually NA: Total Points,ID Date, Site Despite Code, Time Code, Institution, User Name, Habitat, WQS, Length, Depth

    Taxa codes in PhotoGrid output are provided in MS Excel97 file: CRAMP99codesum.xls

    The codes sheet was dumped into a CSV format in text file: taxacodes.csv

    Potential frequently asked question: -The CRAMP website lists available benthic data parameters: coral and substrate cover. Can these be derived from the PhotoGrid data given? How?

    Reply from Ku'ulei Rodgers: We use ACCESS, a relational database that calculates these for us but it can be done in EXCEL as well by sorting alphabetically and deriving a percent of the total for each substrate type. For example if you have 10 points that are Porites compressa and there are 20 frames with 50 points on each, this would be 10 out of 1000 points for the whole transect so 1% cover. This is then done for each substrate type. Then all the coral species percentages are added together for a total coral cover number.

    2. Files in ../../data/waikiki2002

    Filename template: SSSTTDDmyyyymmdd.csv

    SSS : site (see #STATIONS above) yyyymmdd : survey date TT : transect number DDm : depth in meters

    Fields in these files: same as above

    Entity_and_Attribute_Detail_Citation: None

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?

    Department of Commerce, National Oceanic and Atmospheric Administration, Hawaii Coral Reef Initiative, National Ocean Service, United States Geological Survey, State of Hawaii, Department of Land and Natural Resources, Division of Aquatic Resources, Kahoolawe Island Reserve Commission, United States Fish and Wildlife Service, Coastal Program, Limahuli National Botanical Garden, Save Our Seas

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

    Dr. Paul Jokiel
    Hawaii Institute of Marine Biology University of Hawaii
    Principal Investigator
    P.O. Box 1346
    Kaneohe, Hawaii 96744

    808-236-7440 (voice)

Why was the data set created?

To understand the ecology of Hawaiian coral reefs in relation to other geographic areas and to monitor change at each given site. CRAMP experimental design allows detection of changes that can be attributed to various factors such as: overuse (over-fishing, anchor damage, aquarium trade collection, etc.), sedimentation, nutrient loading, catastrophic natural events (storm wave impact, lava flows), coastal construction, urbanization, global warming(bleaching), introduced species, algal invasions, and fish and invertebrate diseases. The emphasis of the program is on the major problems facing Hawaiian coral reefs as listed by managers and reef scientists during workshops and meetings held in Hawaii (1997-1998). These are: over-fishing, sedimentation, eutrophication, and algal outbreaks. CRAMP experimental design gives priority to areas where baseline data relevant to these issues were previously collected. Transect dimensions, number of replicates, and methods of evaluation have been selected to detect changes with statistical confidence. Standard techniques include the establishment of permanent transects to quantify fish, coral, algae, and invertebrates at study sites. CRAMP researchers are quantifying changes that have occurred on coral reefs subjected to varying degrees of fishing pressure, sedimentation, eutrophication, and algal growth and are conducting experimental work in order to test hypotheses concerning the role of these environmental factors in the ecology of coral reefs. We are also in the process of resurveying, updating and integrating existing ecological information on an array of coral reefs that have been designated as areas of concern or, "hot spots," by managers and scientists.

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)
    Quantitative Rapid Assessment Technique (RAT) Protocol

    The CRAMP Assessment Protocol RAT is a highly abbreviated version of the CRAMP monitoring protocol, consisting of a single fish transect, a single benthic transect, a rugosity measurement, a sediment sample and various qualitative habitat observations. The assessment protocol is designed to produce quantitative spatial data that is consistent with and comparable to data taken at the permanent monitoring sites. The power of the RAT lies in large numbers of replicates taken over the spatial range of a given habitat. The assessment program expands our ability to describe habitats and spatial distributions of Hawaiian reef organisms in relation to various environmental factors. However, the assessment protocol requires a small fraction of the human effort and cost per site. This is critical due to the large number of sites needed to describe habitats along the entire coast of Hawaii. Considerable time saving is achieved because no permanent transect markers are needed and no permanent photo-quadrats are installed. Assessment data can be used with monitoring data for spatial comparisons, but the benthic assessment data does not have the statistical power needed to establish temporal change with the degree of precision involved in the monitoring effort unless an extremely large number of RATs are performed in a small area or repeatedly over time.

    All of the CRAMP long-term monitoring sites have been established on hard bottom in coral habitats stratified at depths of 3 m and 10 m. In contrast, the RAT is used in all coral reef ecosystem habitats and at all depths being mapped.

    The reef fish sampling method used in the RAT is identical to the monitoring method, but only one 25m x 5 m transect is measured. The benthic sampling effort is the same as used at the monitoring sites, but reduced to a single 10 m transect that only has sufficient power to describe habitat differences. The RAT requires the use of two divers to conduct the full survey (fish, benthic video recording, rugosity measurement, sediment and observations) in a single short dive. In contrast, establishing the monitoring sites took a team of 6 divers multiple dives to install and conduct the initial monitoring of the site. Data entry time for the assessment method is reduced to less than 2 person-hours per site for the assessment method compared to more than 20 person-hours for the monitoring sites. The monitoring site protocol must have sufficient statistical power to detect a less than 10% change in coral cover between samplings. The assessment protocol only requires sufficient statistical power to allow quantitative description of a given habitat. Generally from 3 to 7 RATs are needed to describe a given habitat.

    1. Location of the assessment site is pre-determined using the habitat maps and other information to develop the experimental design. A stratified random sample is selected from within each habitat. Latitude and longitude are determined for each rapid assessment site and entered as way points into the GPS.

    2. A field team consisting of 2 divers navigates to way point using GPS, marks the location with a lead weight and float and accurately establishes the location using GPS measurements. Divers descend together. Diver 1 carries one 25 m transect line. Diver 1 begins fish transect starting at the marked way point and moves along depth contour. The fish count method is identical to that described above for the monitoring method. Diver 2 carries digital video system and rugosity chain. As diver 1 lays out transect line, diver 2 video records the general environment through the full 360-degree panorama at the starting point. Diver 2 then begins to video one 10 m transect selected at random along the 25 m fish transect line. Diver 2 also runs rugosity on the the 10-m transects. Diver 1 completes the fish transect and assists Diver 2 in completion of the rugosity, sediment sampling and general observations. This produces a data set similar to the monitoring sites but with only one fish transects. Brown, E, E Cox, B Tissot, K Rodgers, and W Smith (1999). Evaluation of benthic sampling methods considered for the Coral Reef Assessment and Monitoring Program (CRAMP) in Hawaii. International Conference on Scientific Aspects of Coral Reef Assessment, Monitoring, and Restoration. April 14-16, Ft. Lauderdale, FL.

    Green, R H and S R Smith (1997). Sample program design and environmental impact assessment on coral reef. Proc 8th International Coral Reef Symposium. 2: 1459-1464.

    McCormick, Mark 1994. Comparison of field methods for measuring surface topography and their associations with a tropical reef fish assemblage. Marine Ecology Progress Series 112: 87-96.

    Person who carried out this activity:

    Dr. Paul Jokiel
    Hawaii Institute of Marine Biology University of Hawaii
    Principal Investigator
    P.O. Box 1346
    Kaneohe, Hawaii 96744

    808-236-7440 (voice)

  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?

    The 2001-2004 surveys were 100% complete

  5. How consistent are the relationships among the observations, including topology?

    see Process Step

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: Dataset credit required

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

    NOAA/NESDIS/NODC/NCDDC (National Coastal Data Development Center)
    National Coastal Data Development Center, Building 1100
    Stennis Space Center, MS 39529

    866-732-2382 (voice)
    228-688-2968 (FAX)

    Hours_of_Service: 8am-5pm, Monday through Friday
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA, NESDIS, NODC and NCDDC cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 24-Jan-2017
Last Reviewed: 17-Dec-2008
Metadata author:
Mr. Patrick C. Caldwell
Hawaii/US Pacific Liaison
1000 Pope Road, MSB 316
Honolulu, Hawaii 96822

(808)-956-4105 (voice)
(808) 956-2352 (FAX)

Hours_of_Service: 8 AM to 5 PM weekdays
Contact_Instructions: check services@nodc.noaa.gov if not available
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.13 on Sun Jan 21 09:44:01 2018