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Coral size and condition data collected by the Guam Long-term Coral Reef Monitoring Program from 2010-08-04 to 2019-09-06 (NCEI Accession 0228761)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 03, 2026 at 03:50 AM | Dataset Last Updated: April 16, 2021 at 12:00 AM
The data in this package include coral colony size and condition data collected as part of the Guam Long-term Coral Reef Monitoring Program (GLTMP). The monitoring team assesses all coral colonies found within quadrats placed every five meters along 25 m transects (although note that transects of different lengths have been used). Quadrat size is 0.25 sq m for most sites; a larger quadrat size (0.75 sq m) is used for the Western Shoals and Fouha Bay sites. Collected data include measurements of coral colony length and width as well as an assessment of condition (percent old mortality, percent new mortality, disease/condition type and severity), with identification to species level when possible. These data were collected using a split-panel sampling approach, whereby a mix of permanent and non-permanent sampling stations (one sampling station = one transect) are visited within each site. The location of coral colony survey quadrats at permanent sampling stations are marked using masonry nails, facilitating the near-identical positioning of quadrats during subsequent visits. However, the identical re-positioning of some quadrats could not be attained during subsequent visits due to the failure to re-locate the nails. The monitoring sites represent high priority reef areas selected by an advisory body comprised of reef managers, researchers, and technicians. The sites were not selected randomly from around the island and thus should not be considered representative of reef condition at the island-scale. While the general location of the sites were selected based on management priority, the site boundaries were delineated using bathymetry and benthic habitat data within ArcGIS; the locations of the sampling stations were generated randomly within each site’s boundaries using ArcGIS.

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0228761 CORAL CORAL - CENSUS CORAL - COLONY SIZE CORAL - SPECIES IDENTIFICATION visual observation biological in situ

Complete Metadata
@type dcat:Dataset
accessLevel non-public
contactPoint 
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describedByType application/octet-steam
description The data in this package include coral colony size and condition data collected as part of the Guam Long-term Coral Reef Monitoring Program (GLTMP). The monitoring team assesses all coral colonies found within quadrats placed every five meters along 25 m transects (although note that transects of different lengths have been used). Quadrat size is 0.25 sq m for most sites; a larger quadrat size (0.75 sq m) is used for the Western Shoals and Fouha Bay sites. Collected data include measurements of coral colony length and width as well as an assessment of condition (percent old mortality, percent new mortality, disease/condition type and severity), with identification to species level when possible. These data were collected using a split-panel sampling approach, whereby a mix of permanent and non-permanent sampling stations (one sampling station = one transect) are visited within each site. The location of coral colony survey quadrats at permanent sampling stations are marked using masonry nails, facilitating the near-identical positioning of quadrats during subsequent visits. However, the identical re-positioning of some quadrats could not be attained during subsequent visits due to the failure to re-locate the nails. The monitoring sites represent high priority reef areas selected by an advisory body comprised of reef managers, researchers, and technicians. The sites were not selected randomly from around the island and thus should not be considered representative of reef condition at the island-scale. While the general location of the sites were selected based on management priority, the site boundaries were delineated using bathymetry and benthic habitat data within ArcGIS; the locations of the sampling stations were generated randomly within each site’s boundaries using ArcGIS.
distribution 
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identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/accessions/iso/xml/0228761.xml
issued 2021-04-09T00:00:00.000+00:00
keyword 
[
  "0228761",
  "CORAL",
  "CORAL - CENSUS",
  "CORAL - COLONY SIZE",
  "CORAL - SPECIES IDENTIFICATION",
  "visual observation",
  "biological",
  "in situ",
  "survey - biological",
  "survey - coral reef",
  "survey - swimmer/diver",
  "visual observation",
  "University of Guam",
  "University of Guam",
  "Coral Reef Conservation Program (CRCP)",
  "CORAL REEF STUDIES",
  "Northwest Pacific Ocean (limit-180)",
  "Philippine Sea",
  "oceanography",
  "Guam Bureau of Statistics and Plans",
  "University of Guam Marine Laboratory",
  "NA07NOS4260060",
  "NA10NOS4260060",
  "NA11NOS4820007",
  "NA13NOS4820012",
  "NA15NOS4820039",
  "NA17NOS4820038",
  "State and Territorial Government Cooperative Agreements",
  "Comprehensive Long-term Coral Reef Monitoring at Permanent Sites on Guam",
  "Numeric Data Sets > Benthic",
  "EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat > Description",
  "EARTH SCIENCE > Biosphere > Ecological Dynamics > Species Richness",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Coral Diseases",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Coral Diseases > Bleaching",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Benthos Analysis > Quadrat Monitoring",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Benthos Analysis > Quadrat Monitoring > In Situ",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Coral Colony Size and Condition",
  "EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Coral Colony Size and Condition > Quadrat Monitoring",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs",
  "EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Benthic biology",
  "EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC",
  "EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > REEF > CORAL REEF",
  "EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS > CORAL REEFS",
  "VISUAL OBSERVATIONS > VISUAL OBSERVATIONS",
  "COUNTRY/TERRITORY > United States of America > Guam > Achang (13N144E0064)",
  "COUNTRY/TERRITORY > United States of America > Guam > Cocos Lagoon (13N144E0057)",
  "COUNTRY/TERRITORY > United States of America > Guam > East Agana Bay (13N144E0063)",
  "COUNTRY/TERRITORY > United States of America > Guam > Fouha Bay (13N144E0024)",
  "COUNTRY/TERRITORY > United States of America > Guam > Piti Bay (13N144E0061)",
  "COUNTRY/TERRITORY > United States of America > Guam > Tumon Bay (13N144E0004)",
  "COUNTRY/TERRITORY > United States of America > Guam > Western Shoal (13N144E0062)",
  "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Achang (13N144E0064)",
  "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Cocos Lagoon (13N144E0057)",
  "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > East Agana Bay (13N144E0063)",
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  "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Piti Bay (13N144E0061)",
  "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Tumon Bay (13N144E0004)",
  "OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Western Shoal (13N144E0062)",
  "OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN",
  "VERTICAL LOCATION > SEA FLOOR",
  "5T40E9"
]
landingPage https://www.ncei.noaa.gov/contact
language 
[]
license https://creativecommons.org/publicdomain/zero/1.0/
modified 2021-04-16T00:00:00.000+00:00
publisher 
{
  "name": "NOAA National Centers for Environmental Information",
  "@type": "org:Organization"
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references 
[
  "https://www.fisheries.noaa.gov/inport/item/47781",
  "https://guamcoralreefmonitoring.wordpress.com/",
  "https://repository.library.noaa.gov/view/noaa/29489"
]
rights otherRestrictions
spatial 144.991,13.21,144.583,13.671
temporal 2010-08-04T00:00:00+00:00/2019-09-06T00:00:00+00:00
theme 
[
  "geospatial"
]
title Coral size and condition data collected by the Guam Long-term Coral Reef Monitoring Program from 2010-08-04 to 2019-09-06 (NCEI Accession 0228761)

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