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)
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.
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.
Dataset Citation
- Cite as: Burdick, David (2021). 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). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0228761. Accessed [date].
Dataset Identifiers
ISO 19115-2 Metadata
gov.noaa.nodc:0228761
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NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov |
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NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Time Period | 2010-08-04 to 2019-09-06 |
Spatial Bounding Box Coordinates |
West: 144.583
East: 144.991
South: 13.21
North: 13.671
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Dataset Progress Status | Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | As needed |
Supplemental Information | Submission Package ID: 5T40E9 |
Purpose | The coral quadrat data are collected as part of the Guam Long-term Coral Reef Monitoring Program, which documents a number of important parameters related to ecosystem health; these parameters are grouped into three categories: water quality, benthic habitat, and associated biological communities. Many of these parameters are indicators of stressors, and significant changes in these parameters will likely raise concern and possibly trigger management actions. Data collected for these indicators provide important information about the resilience of high priority reef areas around Guam. Monitoring these parameters allows resource managers to evaluate the effectiveness of specific management strategies, and inform the development of new management actions. |
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Last Modified: 2024-02-21T13:44:27Z
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov