cred_towboard_benthic_oahu_island_2006 eng; USA utf8 dataset Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 USA nmfs.pic.credinfo@noaa.gov e-mail preferred pointOfContact 2019-05-26 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) World Geodetic System 1984 WGS 84 2007-08-27 revision https://epsg.org/crs_4326/WGS-84.html WGS 84 GML of World Geodetic System 1984 coordinate reference system. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html European Petroleum Survey Group Geodetic Parameter Registry Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations. search publisher urn:ogc:def:crs:EPSG::4326 CRED Towed-Diver Benthic Characterization Surveys at Oahu Island, Main Hawaiian Islands in 2006 2008-07-27 publication Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) originator tableDigital To support NOAA Coral Reef Conservation Program (CRCP) long-term goals for sustainable management and conservation of coral reef ecosystems, towed-diver surveys (aka. towboard surveys) were conducted by the Coral Reef Ecosystem Division (CRED) of the NOAA Pacific Islands Fisheries Science Center (PIFSC) as part of biennial Pacific Reef Assessment and Monitoring Program (RAMP) Cruises. 3 towboard surveys (6.2773 km in length), were conducted at Oahu Island during the Main Hawaiian Islands RAMP Cruise HI0610 from July 27 - August 20 2006. Towboard surveys are a good method for obtaining a general description of large reef areas, assessing the status of low-density populations of large-bodied reef fish, large-scale disturbances (e.g., bleaching), general distribution and abundance patterns of macro-invertebrates (e.g., COT, giant clams), and for assessing trends in these populations and metrics. A pair of scuba divers (1 fish and 1 benthic diver) are towed 60 m behind a small survey launch at a speed of 1-2 knots and a depth of approximately 15m. Each survey is 50 min long, covers about 2 km of habitat, and is divided into ten 5-minute survey segments. The fish diver records, to the lowest possible taxon, all large-bodied reef fishes (>50cmTL) seen within 5m either side and 10m in front of the towboard. Length of each individual is estimated to the nearest cm. The fish towboard is also outfitted with a forward-facing digital video camera to record the survey swath. The benthic diver records percent cover of coral and macroalgae, estimates benthic habitat type and complexity, and censuses a suite of benthic macroinvertebrates including Crown of Thorns sea stars and sea urchins. The benthic towboard is equipped with a downward-facing digital still camera which images the benthos at 15 second intervals. These images are analyzed for percent cover of coral, algae, and other benthic components. Both towboards are equipped with SEABIRD SBE-39 temperature/depth sensors set to record at 5 second intervals. Latitude and longitude of each survey track is recorded at 15 second intervals using a Global Positioning System (GPS) receiver onboard the tow boat. A layback algorithm is applied to more accurately map the position of the divers with respect to the reef environment. This algorithm calculates the position of the divers based on the position of the tow boat taking into account the length of the tow rope, the depth of the divers, and the curvature of the survey track. This metadata applies to the benthic characterization observations. Part of a long-term monitoring program at biennial intervals which documents the state of the reefs. Rusty Brainard and Jake Asher, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Sciences Center, National Marine Fisheries Service, NOAA completed Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 USA nmfs.pic.credinfo@noaa.gov e-mail preferred pointOfContact ASNEEDED CoRIS_Metadata theme NCEI Geoportal Filter Pacific Reef Assessment and Monitoring Program (Pacific RAMP): Biennial monitoring for the U.S. Pacific Islands and Atolls 1221 project CRCP Project Marine Ecosystem Reef Assessment and Monitoring Program (RAMP) Coral Reef Towed Diver Surveys Benthic Habitats Main Hawaiian Islands Oahu Island HI0610 theme None EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral reef ecology EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral reef ecology > Habitats EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat theme CoRIS Theme Thesaurus Numeric Data Sets > Biology theme CoRIS Discovery Thesaurus The United States Main Hawaiian Islands Oahu Island place None MHI place CoRIS Region OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu Island > Oahu (21N157W0003) COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Oahu (21N157W0003) place CoRIS Place Thesaurus 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. otherRestrictions 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 otherRestrictions Access Constraints: Data are available two years following data collection date. unclassified Not applicable Not applicable eng; USA biota Native Dataset Environment: Oracle Technical Prerequisites: Contact CRED data management team for information -158.280969 -157.648625 21.254737 21.712459 2006-07-27 2006-07-27 The benthic characterization observation data includes benthic composition, complexity estimations, observed macro-invertebrates, and observed man-made objects. Classification of habitat complexity was recorded in six categories: low (L), medium-low (ML), medium (M), medium-high (MH), high (H), and very high (VH). Benthic cover was estimated for four different types of substrate: hard substrate/pavement, sand, rubble, and live hard (scleractinian) coral. The time of the benthic digital photos were set to the GMT time. There were approximately 200 pictures of each 50-minute towed survey track. The resolution at "Draft" quality (the lowest) is 72 pixels/inch. The resolution at "Best" quality (the highest) is 266 pixels/inch. The naming convention of benthic photos is ***MMDDYY_X_###.JPG, where *** is 3 letters abbreviation of island/bank surveyed, MMDDYY is the local date of towboard survey, X is the Xth dive on the day of MMDDYY, and ### is the sequence number of the pictures taken at the Xth dive. For example, JAR032106_3_108.JPG means the picture was the 108th picture taken at 3rd dive on March 21, 2006 at Jarvis Island. XLS (Microsoft Excel worksheet) CRED data management team Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 USA nmfs.pic.credinfo@noaa.gov e-mail preferred distributor None if receiving the data online CDROM, OR EMAIL iso9660 dataset Horizontal Positional Accuracy Report Although resource grade GPS units were used and a layback model was applied to the survey tracks, the exact survey positions were rarely marked and little effort was made to revisit exact same tracks. Horizontal Positional Accuracy Instrument parameters meters 1 Vertical Positional Accuracy Report Dive computer and SCUBA depth gauge Vertical Positional Accuracy Instrument parameters meters 0.3 The towed-diver surveys are completed in forereef, backreef, and lagoon habitats. Considering that the towed-divers are covering ~200 m during each 5-min time frame of a 50-minute survey, benthic coverage calculations are broad estimates. These data can be used to see large differences but can not be process to a fine scale. The same data collection protocols were used at each island/bank surveyed. Benthic towed-diver surveys involve a SCUBA diver who maintains approximately 1 meter above the bottom and is towed 60 m behind a boat at a constant speed (~1.5 knots). The diver maneuvers a towboard equipped with a downward facing still camera that is programmed to take photographs of the benthos at every 15 seconds as well as a SBE39 depth/temperature recorder which records the temperature and depth every 5 seconds. The towboard survey is typically 50 min long and covers about 2 km of habitat, depending on the depth profile of the divers. The survey is divided into 5 min segments. During the survey, the benthic diver records benthic composition, complexity estimations, observed macro-invertebrates, and observed man-made objects. annually This metadata was automatically generated from the Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2016-01-11 version of the FGDC RSE to ISO 19115-2 transform. Translated from FGDC 2025-03-24T15:50:47.799Z Last Metadata Review Date: 2010-04-07 Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA) 808 725-5360 808 725-5429 NOAA IRC NMFS/PIFSC/CRED 1845 WASP Blvd., Building 176 Honolulu HI 96818 USA nmfs.pic.credinfo@noaa.gov e-mail preferred pointOfContact