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National Coral Reef Monitoring Program: Benthic Complexity and Urchin Abundance at
Climate Stations in American Samoa from 2015 to 2018
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Benthic complexity and urchin abundance data were collected as part of NOAA's ongoing
National Coral Reef Monitoring Program (NCRMP). These data were gathered around American
Samoa as a part of the NOAA Pacific Islands Fisheries Science Center (PIFSC), Ecosystem
Sciences Division (formerly the Coral Reef Ecosystem Division) led missions from 2015
to 2018.
During these missions, the variables of benthic complexity and urchin abundance were
recorded by SCUBA divers during visual surveys at NCRMP climate stations. A select
number of climate sites were chosen per island in hard-bottom habitat at 15-m depths
in a stratified random fashion.
To record benthic complexity, the divers ran a 15-m transect from the reference stake
for the site and estimated two maximum vertical relief measurements per meter along
the 15-m transect (based on an area of 0.5 m x 1 m to the left and 0.5 m x 1 m to
the right of each meter on the transect) for a total of 30 measurements. The measurements
were tallied into five substrate height bins, including 0-20 cm, 20-50 cm, 50-100
cm, 100-150 cm, and >150 cm. The total frequency for the five substrate height bins
is 30 units for a 15-m transect. Maximum depth, minimum depth, and maximum vertical
relief were also recorded for the climate station.
Free and boring urchin abundance was estimated within the climate station and recorded
using DACOR, an abundance code based on visual estimation; dominant (D), abundant
(A), common (C), occasional (O), and rare (R).
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CRCP Project |
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CoRIS Discovery Thesaurus |
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CoRIS Place Thesaurus |
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CoRIS Theme Thesaurus |
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No Title |
Global Change Master Directory (GCMD) Data Center Keywords |
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InPort |
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NOAA |
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NOAA Data Management Plan (DMP) |
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36099
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NOAA/NMFS/EDM |
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NODC DATA TYPES THESAURUS |
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NODC OBSERVATION TYPES THESAURUS |
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NODC PLATFORM NAMES THESAURUS |
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NODC SUBMITTING INSTITUTION NAMES THESAURUS |
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NODC Sea Area Names Thesaurus |
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National Coral Reef Monitoring Program: Benthic Complexity and Urchin Abundance at
Climate Stations in American Samoa from 2015 to 2018 |
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36099
doi:10.7289/V5X928MQ
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National Coral Reef Monitoring Program: Benthic Complexity and Urchin Abundance at
Climate Stations in the Pacific Remote Island Areas from 2014 to 2018 |
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36100
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National Coral Reef Monitoring Program: Benthic Complexity and Urchin Abundance at
Climate Stations of the Hawaiian Archipelago since 2013 |
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36098
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National Coral Reef Monitoring Program: Benthic Complexity and Urchin Abundance at
Climate Stations of the Mariana Archipelago since 2014 |
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25251
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View: V0_TOPOGRAPHIC_COMPLEXITY |
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https://accession.nodc.noaa.gov/0159143 |
V0_TOPOGRAPHIC_COMPLEXITY SAMOA 2015.csv |
Benthic complexity and urchin abundance data captured by the NOAA Coral Reef Ecosystem
Program at sites across Amerian Samoa in 2015. |
download |
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https://accession.nodc.noaa.gov/0187897 |
V0_TOPOGRAPHIC_COMPLEXITY SAMOA 2018.csv |
Benthic complexity and urchin abundance data captured by the PIFSC Ecosystem Sciences
Division at sites across American Samoa during ASRAMP 2018. |
download |
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https://ecowatch.ncddc.noaa.gov/erddap/tabledap/CRCP_Benthic_Complexity_Urchin_Abundance_Pacific.html |
https://ecowatch.ncddc.noaa.gov/erddap/tabledap/CRCP_Benthic_Complexity_Urchin_Abundance_Pacific.html |
NOAA National Centers for Environmental Information (NCEI) ERDDAP web service for
the benthic complexity and urchin abundance data collected by the PIFSC Ecosystem
Sciences Division (ESD) at sites across the Pacific Islands Region during ESD-led
NOAA National Coral Reef Monitoring Program missions from 2013 to 2018. ERDDAP acts
as a middleman between you and various remote data servers. ERDDAP offers an easy-to-use,
consistent way to request data: via the OPeNDAP standard. Many datasets can also be
accessed via ERDDAP's Web Map Service (WMS). ERDDAP returns data in the common file
format of your choice. ERDDAP offers all data as .html table, ESRI .asc and .csv,
Google Earth .kml, OPeNDAP binary, .mat, .nc, ODV .txt, .csv, .tsv, .json, and .xhtml.
ERDDAP can also return a .png or .pdf image with a customized graph or map. ERDDAP
also has web pages (for humans with browsers) and RESTful web services (for computer
programs). |
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https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords |
GCMD Keyword Forum Page |
Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt,
MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard
Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA).
URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords |
information |
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https://www.fisheries.noaa.gov/inport/item/36099 |
Full Metadata Record |
View the complete metadata record on InPort for more information about this dataset. |
information |
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https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/36099.pdf |
NOAA Data Management Plan (DMP) |
NOAA Data Management Plan for this record on InPort. |
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https://www.ncei.noaa.gov/contact |
NCEI Contact Information |
Information for contacts at NCEI. |
information |
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https://www.pifsc.noaa.gov/ecosystem_sciences/ |
Ecosystem Sciences Division |
NOAA Fisheries, Pacific Islands Fisheries Science Center website |
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https://www.pifsc.noaa.gov |
Website |
Website for this organization |
information |
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Climate Station/Site Selection:
A select number of National Coral Reef Monitoring Program (NCRMP) climate stations
per island were established in a stratified random fashion to be roughly equally spaced
around the island along the 15-m contour on hard-bottom habitat and at least 1 km
away from a river mouth or embayment.
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Maximum Vertical Relief / Substrate Height:
At the NCRMP climate station SCUBA divers ran a 15-m transect from the reference stake.
Along the 15-m transect tape, two maximum vertical relief measurements per meter were
tallied (based on an area of 0.5 m x 1 m to the left and 0.5 m x 1 m to the right
of each meter on the transect) for a total of 30 measurements. The total frequency
# for the five substrate height bins should add up to 30 units for a 15-m transect.
Maximum depth, minimum depth, and maximum vertical relief were also recorded for the
climate station. These measurements are defined as:
Maximum depth - deepest point in the NCRMP climate station
Minimum depth - shallowest point in the NCRMP climate station
Maximum vertical relief - height of tallest reef structure present within the NCRMP
climate station.
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Free and Boring Urchin Abundance:
Urchin abundance was estimated by conducting a visual census of free and boring urchins
within the NCRMP climate station and was recorded using DACOR, an abundance code based
on visual estimation: dominant (D), abundant (A), common (C), occasional (O), and
rare (R).
For Free Urchins, DACOR categories are quantified as:
D: 101-999
A: 51-100
C: 21-50
O: 6-20
R: 0-5
For Boring Urchins, DACOR categories are quantified as:
D: 501-999
A: 251-500
C: 101-250
O: 26-100
R: 0-25
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