CRED Towed-Diver Benthic Characterization Surveys at Asuncion Island, Marianas Archipelago in 2009


Metadata
File Identifier:
Metadata Language: eng; USA
: utf8
Resource Type: Dataset
Responsible Party:
Organisation Name: Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Role: Point Of Contact
Contact Info:
Voice: 808 725-5360
Fax: 808 725-5429
Delivery Point: NOAA IRC
City: Honolulu
Administrative Area: HI
Postal Code: 96818
Country: USA
E-Mail Address: nmfs.pic.credinfo@noaa.gov
Metadata Date: 2018-06-20
Metadata Standard Name: ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
Metadata Standard Version: ISO 19115-2:2009(E)
Data Identification
Abstract: 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. 9 towboard surveys (20.1776 km in length), were conducted at Asuncion Island during the Marianas Archipelago RAMP Cruise HI0903 from 15 April - 7 May 2009. 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.
Purpose: Part of a long-term monitoring program at biennial intervals which documents the state of the reefs.
Language: eng; USA
Citation:
Title: CRED Towed-Diver Benthic Characterization Surveys at Asuncion Island, Marianas Archipelago in 2009
Date:
Date: 2009-05-08
Date Type: Publication Date
Organisation Name: Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Role: Originator
Organisation Name:
Role:
Contact Info:
Online Resource: https://pifsc-www.irc.noaa.gov/cred/towboard.php
Point Of Contact:
Organisation Name: Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Role: Point Of Contact
Contact Info:
Voice: 808 725-5360
Fax: 808 725-5429
Delivery Point: NOAA IRC
City: Honolulu
Administrative Area: HI
Postal Code: 96818
Country: USA
E-Mail Address: nmfs.pic.credinfo@noaa.gov
Topic Category: Biology and Ecology
Keyword Collection:
Keyword: CoRIS_Metadata
Associated Thesaurus: NCEI Geoportal Filter
Keyword: Pacific Reef Assessment and Monitoring Program (Pacific RAMP): Biennial monitoring for the U.S. Pacific Islands and Atolls
Keyword: 1221
Associated Thesaurus: CRCP Project
Keyword: Marine Ecosystem
Keyword: Reef Assessment and Monitoring Program (RAMP)
Keyword: Coral Reef
Keyword: Towed Diver Surveys
Keyword: Benthic Habitats
Keyword: Marianas Archipelago
Keyword: Asuncion Island
Keyword: HI0903
Associated Thesaurus: None
Keyword: EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
Keyword: EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral reef ecology
Keyword: EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral reef ecology > Habitats
Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment
Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
Associated Thesaurus: CoRIS Theme Thesaurus
Keyword: Numeric Data Sets > Biology
Associated Thesaurus: CoRIS Discovery Thesaurus
Keyword: The United States
Keyword: Marianas Archipelago
Keyword: Asuncion Island
Associated Thesaurus: None
Spatial Extent:
West Bounding Longitude: 145.380285
East Bounding Longitude: 145.426744
North Bounding Latitude: 19.714531
South Bounding Latitude: 19.66881
Constraints: 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.
Legal Constraints:
Use Constraints: Other Restrictions
Other Constraints: 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
Legal Constraints:
Access Constraints: Other Restrictions
Other Constraints: Access Constraints: Data are available two years following data collection date.
Security Constraints:
Classification: unclassified
Classification System: Not applicable
Handling Description: Not applicable
Distribution
Distribution Format:
Format Name: XLS (Microsoft Excel worksheet)
Format Version:
Distributor:
Distributor Contact:
Individual Name: CRED data management team
Organisation Name: Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Role: Distributor
Contact Info:
Voice: 808 725-5360
Fax: 808 725-5429
Delivery Point: NOAA IRC
City: Honolulu
Administrative Area: HI
Postal Code: 96818
Country: USA
E-Mail Address: nmfs.pic.credinfo@noaa.gov
Quality
Scope: Dataset