Dataset Overview | National Centers for Environmental Information (NCEI)

Benthic Surveys in Vatia, American Samoa: benthic cover derived from analysis of benthic images collected during belt transect surveys of coral demography from 2020-01-23 to 2020-01-29 (NCEI Accession 0264809)

Preview graphic

The benthic cover data described here were generated from the quantitative analysis of photoquadrat benthic images using CoralNet image analysis software, whereby random points are projected on each image and the benthic elements falling directly underneath each point are identified. The images were collected at 18 stratified randomly selected sites in Vatia Bay in 2015 during belt transect surveys of coral demography by the Ecosystem Sciences Division (ESD) of the NOAA Pacific Islands Fisheries Science Center (PIFSC).

The benthic cover data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive. The benthic images and coral demography data are described and archived separately.

Dataset Citation

Cite as: Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (2022). Benthic Surveys in Vatia, American Samoa: benthic cover derived from analysis of benthic images collected during belt transect surveys of coral demography from 2020-01-23 to 2020-01-29 (NCEI Accession 0264809). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0264809. Accessed [date].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0264809

Full Text · XML

Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
Distribution Formats	CSV
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2020-01-23 to 2020-01-29
Spatial Bounding Box Coordinates	West: -170.674412 East: -170.667963 South: -14.249853 North: -14.24367
Spatial Coverage Map

General Documentation

NCEI Dataset Landing Page
Navigate directly to the URL for a descriptive web page with download links.
Descriptive Information
Navigate directly to the URL for a descriptive web page with download links.

Associated Resources

Pacific Islands Fisheries Science Center, 2022: Benthic Surveys in Vatia, American Samoa: benthic cover derived from analysis of benthic images collected during belt transect surveys of coral demography in 2015 and 2020, https://www.fisheries.noaa.gov/inport/item/31611.
- https://www.fisheries.noaa.gov/inport/item/31611
  InPort Record
Analysis of benthic survey images via CoralNet : a summary of standard operating procedures and guidelines
- https://doi.org/10.7289/v5/ar-pifsc-h-17-02
  journal article - CoralNet Standard Operating Procedures.
Land-based pollution impacting coral reefs in Vatia Bay
- https://doi.org/10.7289/v5bz6417
  Scientific article concerning LBSP impacts on coral reefs in Vatia Bay
Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (2022). Benthic Surveys in Vatia, American Samoa: benthic images collected during belt transect surveys from 2020-01-23 to 2020-01-29 (NCEI Accession 0259494). NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0259494.
- https://www.ncei.noaa.gov/archive/accession/0259494
  NCEI data accession containing the associated imagery

Publication Dates	publication: 2022-10-18
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
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
Purpose	These data were generated from benthic surveys undertaken in Vatia Bay to establish a comprehensive baseline for benthic composition and coral demographics, and are part of a broader NOAA Coral Reef Conservation Program (CRCP) funded project led by NCCOS to assess eutrophication impacts on coral ecosystem health in the bay. These efforts feed into the higher-level CRCP objectives by establishing an in-situ tracking system to assess the effects of management and mitigation strategies and activities in the target watersheds to reduce land-based sources of pollution. Jurisdictional managers have expressed concerns that nutrients from the village of Vatia, Tutuila, American Samoa, are having an adverse effect on the adjacent coral reef ecosystem. Excess nutrient loads promote increases in algal growth that can have deleterious effects on corals, such as benthic algae outcompeting and overgrowing corals. Nitrogen and phosphorus can also directly impact corals by lowering fertilization success, and reducing both photosynthesis and calcification rates. Land-based contributions of nutrients come from a variety of sources; in Vatia the most likely sources are poor wastewater management from piggeries and septic systems.
Use Limitations	accessLevel: Public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.

Dataset Citation	Cite as: Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (2022). Benthic Surveys in Vatia, American Samoa: benthic cover derived from analysis of benthic images collected during belt transect surveys of coral demography from 2020-01-23 to 2020-01-29 (NCEI Accession 0264809). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0264809. Accessed [date].
Cited Authors	Ecosystem Sciences Division, Pacific Islands Fisheries Science Center
Principal Investigators	Bernardo Vargas-Ángel US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division; Coral Reef Ecosystem Program (CREP)
Contributors	US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division
Resource Providers	Lori Luers US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division
Points of Contact	Lori Luers US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division; Coral Reef Ecosystem Program (CREP)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding Agency: US DOC; NOAA; NOS; Coral Reef Conservation Program

Theme keywords	NODC DATA TYPES THESAURUS BENTHIC COMMUNITIES BENTHIC SPECIES biological data CORAL CORAL - CENSUS CORAL - SPECIES IDENTIFICATION HABITAT - BENTHIC NODC OBSERVATION TYPES THESAURUS biological laboratory analyses WMO_CategoryCode oceanography CoRIS Discovery Thesaurus Numeric Data Sets > Benthic CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat EARTH SCIENCE > Biosphere > Vegetation > Algae > Algal Cover EARTH SCIENCE > Biosphere > Vegetation > Algae > Crustose Coralline Algae EARTH SCIENCE > Biosphere > Vegetation > Algae > Encrusting Macroalgae EARTH SCIENCE > Biosphere > Vegetation > Algae > Fleshy Macroalgae EARTH SCIENCE > Biosphere > Vegetation > Algae > Turf Algae EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Baseline studies EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Benthos Analysis EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Benthos Analysis > Transect Monitoring EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Benthos Analysis > Transect Monitoring > Belt Transect EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Photographic Analysis 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 > Benthic biology EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Coral Cover EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Hard Coral Cover EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Octocoral Cover Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > BIOLOGICAL CLASSIFICATION EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS > CORAL REEFS
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division Contributing Organizations CRED CREP Coral Reef Ecosystem Division Coral Reef Ecosystem Program ESD Ecosystem Sciences Division PIFSC Pacific Islands Fisheries Science Center Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/NMFS/PIFSC/ESD > Ecosystem Sciences Division, Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS photograph
Place keywords	NODC SEA AREA NAMES THESAURUS South Pacific Ocean CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > American Samoa > Tutuila Island > Vatia Bay (14S170W0028) OCEAN BASIN > Pacific Ocean > Tutuila Island > Vatia Bay (14S170W0028) Global Change Master Directory (GCMD) Location Keywords OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN
Project keywords	NODC PROJECT NAMES THESAURUS Coral Reef Conservation Program (CRCP) CORAL REEF STUDIES CRCP Project 31090 31259 Eutrophication Impacts on Coral Ecosystem Health in Vatia, American Samoa Status and trends assessment for LBSP impacts on reef communities in Faga’alu Bay and Vatia Bay
Keywords	NCEI ACCESSION NUMBER 0264809
Keywords	Send2NCEI Submission Package ID DYYU6M

Use Constraints	Cite as: Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (2022). Benthic Surveys in Vatia, American Samoa: benthic cover derived from analysis of benthic images collected during belt transect surveys of coral demography from 2020-01-23 to 2020-01-29 (NCEI Accession 0264809). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0264809. Accessed [date].
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees	In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Processing Steps	2022-10-18T11:59:53Z - NCEI Accession 0264809 v1.1 was published.
Output Datasets	NCEI Accession 0264809 v1.1 NCEI Accession 0264809 v1.1 (download) published 2022-10-18T11:59:53Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: BENTHIC COMMUNITIES (calculated); Units: unitless; Observation Category: visual estimate; Sampling Instrument: photograph; Sampling and Analyzing Method: Benthic habitat images collected during photoquadrat surveys are quantitatively analyzed visually with the assistance of a web-based, machine-learning, image annotation tool, CoralNet. The robot tool annotates ten random points on each image for a total of 300 points per site, which are then reviewed by human analysts. The human annotations are then used to train the robot. This data is the final form of the robot-assisted human annotations. Taxa identification occurs at three functional group levels of benthic cover. Tier 1 (e.g., hard coral, soft coral, macroalgae, turf algae, etc.), Tier 2 (e.g., Hard Coral = massive, branching, foliose, encrusting, etc.; Macroalgae = upright macroalgae, encrusting macroalgae, bluegreen macroalgae, and Halimeda, etc.), and Tier 3 (e.g., Hard Coral = Astreopora sp, Favia sp, Pocillopora, etc.; Macroalgae = Caulerpa sp, Dictyosphaeria sp, Padina sp, etc.); Data Quality Method: ACCURACY: 1) Each analyst is required to complete training and a calibration exercise prior to image analysis (classification/annotation), and follows the Benthic Image Analysis Standard Operating Procedure (Lozada-Misa et al. 2017). For a calibration exercise, a subset of photos (~100-150) are selected from the production series and CoralNet assigns 10 random fixed points per photo. Each analyst classifies the same set of points for each of the photos used in the calibration exercise. The goal of the calibration exercise is to assess inter-observer variability. 2) Handheld GPS units were used to locate random sites and mark site locations. COMPLETENESS REPORT: The data set derived from the image analysis is as good as the images themselves; poor images with low contrast, inappropriate white balance, or out of focus may have to be discarded. Therefore, benthic estimates for some sites may derive from differing numbers of points between sites. Although the analysis process is statistically robust to allow for differing n (points) between sites, users should be aware of this limitation..

Lineage information for: dataset

Processing Steps

Parameter or Variable: BENTHIC COMMUNITIES (calculated); Units: unitless; Observation Category: visual estimate; Sampling Instrument: photograph; Sampling and Analyzing Method: Benthic habitat images collected during photoquadrat surveys are quantitatively analyzed visually with the assistance of a web-based, machine-learning, image annotation tool, CoralNet. The robot tool annotates ten random points on each image for a total of 300 points per site, which are then reviewed by human analysts. The human annotations are then used to train the robot. This data is the final form of the robot-assisted human annotations. Taxa identification occurs at three functional group levels of benthic cover. Tier 1 (e.g., hard coral, soft coral, macroalgae, turf algae, etc.), Tier 2 (e.g., Hard Coral = massive, branching, foliose, encrusting, etc.; Macroalgae = upright macroalgae, encrusting macroalgae, bluegreen macroalgae, and Halimeda, etc.), and Tier 3 (e.g., Hard Coral = Astreopora sp, Favia sp, Pocillopora, etc.; Macroalgae = Caulerpa sp, Dictyosphaeria sp, Padina sp, etc.); Data Quality Method: ACCURACY: 1) Each analyst is required to complete training and a calibration exercise prior to image analysis (classification/annotation), and follows the Benthic Image Analysis Standard Operating Procedure (Lozada-Misa et al. 2017). For a calibration exercise, a subset of photos (~100-150) are selected from the production series and CoralNet assigns 10 random fixed points per photo. Each analyst classifies the same set of points for each of the photos used in the calibration exercise. The goal of the calibration exercise is to assess inter-observer variability. 2) Handheld GPS units were used to locate random sites and mark site locations. COMPLETENESS REPORT: The data set derived from the image analysis is as good as the images themselves; poor images with low contrast, inappropriate white balance, or out of focus may have to be discarded. Therefore, benthic estimates for some sites may derive from differing numbers of points between sites. Although the analysis process is statistically robust to allow for differing n (points) between sites, users should be aware of this limitation..

Acquisition Information (collection)
Instrument	photograph

Last Modified: 2024-09-17T19:17:25Z
For questions about the information on this page, please email: ncei.info@noaa.gov

Benthic Surveys in Vatia, American Samoa: benthic cover derived from analysis of benthic images collected during belt transect surveys of coral demography from 2020-01-23 to 2020-01-29 (NCEI Accession 0264809)

Follow us

Contact us