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Dataset Overview | National Centers for Environmental Information (NCEI)

Benthic Cover Derived from Benthic Images Collected Across the Hawaiian Archipelago from 2019-08-27 to 2019-11-14 During a Bleaching Event (NCEI Accession 0259266)

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The data described here result from benthic photo-quadrat surveys conducted along transects at stratified random sites (StRS) and fixed sites surveyed in the Northwestern Hawaiian Islands (NWHI) and the Main Hawaiian Islands (MHI) during bleaching event in 2019. This benthic cover dataset follows a typical benthic image analysis, but includes options for bleaching in imagery annotations. Benthic habitat imagery was quantitatively analyzed using the web-based annotation tool CoralNet (Beijbom et al. 2016) with the addition of codes for bleaching of hard coral. In general, images are analyzed to produce 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.). For each category of hard coral, a bleached and non-bleached option existed during analysis to facilitate the collection of coral bleaching percent cover data.

In the Main Hawaiian Islands (MHI) and some sites in the Northwestern Hawaiian Islands (NWHI), a StRS design was employed to select random sites. The survey domain encompassed the majority of the mapped area of reef and hard bottom habitats in the 0-30 m depth range. The stratification scheme included island, reef zone, and depth in all regions, as well as habitat structure type in the Main Hawaiian Islands. Sampling effort was allocated based on strata area and sites were randomly located within strata. Sites were surveyed using photo-quadrats along transects to collect benthic imagery to ultimately produce estimates of relative abundance (percent cover), frequency of occurrence, benthic community taxonomic composition and relative generic richness.

The StRS design effectively reduces estimate variance through stratification using environmental covariates and by sampling more sites rather than sampling more transects at a site. Therefore, site-level estimates and site to site comparisons should be used with caution.

Surveys conducted in the Main Hawaiian Islands were conducted during shore-based missions and were all StRS, whereas surveys in the Northwestern Hawaiian Islands were performed opportunistically during the regularly scheduled NOAA National Coral Reef Monitoring Program (NCRMP) mission and encompassed StRS as well as fixed sites, which include climate stations and permanent sites
  • Cite as: Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (2022). Benthic Cover Derived from Benthic Images Collected Across the Hawaiian Archipelago from 2019-08-27 to 2019-11-14 During a Bleaching Event (NCEI Accession 0259266). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0259266. Accessed [date].
gov.noaa.nodc:0259266
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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 2019-08-27 to 2019-11-14
Spatial Bounding Box Coordinates
West: -178.383718
East: -155.88832
South: 19.31344
North: 28.459215
Spatial Coverage Map
General Documentation
Associated Resources
  • Pacific Islands Fisheries Science Center, 2022: Benthic Cover Derived from Analysis of Benthic Images Collected in the Hawaiian Archipelago During the 2019 Bleaching Event, https://www.fisheries.noaa.gov/inport/item/59195.
  • Towards Automated Annotation of Benthic Survey Images: Variability of Human Experts and Operational Modes of Automation
  • 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
      Image Analysis Standard Operating Procedure: Lozada-Misa P, Schumacher BD, Vargas-Angel B. 2017. Analysis of benthic survey images via CoralNet : a summary of standard operating procedures and guidelines. Pacific Islands Fisheries Science Center, PIFSC Administrative Report, H-17-02, 169 p. https://doi.org/10.7289/V5/AR-PIFSC-H-17-02
  • Ecosystem Sciences Division Standard Operating Procedures: Data Collection for Rapid Ecological Assessment Benthic Surveys, 2019 Update
Publication Dates
  • publication: 2022-09-08
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
Supplemental Information
Submission Package ID: N4CDE7
Purpose The benthic data resulting from the collection and annotation of benthic imagery can ultimately be used to produce estimates of benthic community taxonomic composition, relative abundance (percentage of benthic cover), and frequency of occurrence, which are fundamental to understanding the status and change of coral reef benthic communities. Working with the Hawaii Coral Bleaching Collaborative (HCBC), NOAA ESD planned and executed a field survey response in 2019 that applied a structured, hypothesis-driven approach to document the extent of coral bleaching in the Hawaiian Archipelago, and laid the groundwork for tracking coral response and recovery through time.
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 Cover Derived from Benthic Images Collected Across the Hawaiian Archipelago from 2019-08-27 to 2019-11-14 During a Bleaching Event (NCEI Accession 0259266). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0259266. Accessed [date].
Cited Authors
Principal Investigators
Collaborators
Contributors
Resource Providers
Points of Contact
Publishers
Acknowledgments
  • Related Funding Agency: US DOC; NOAA; NOS; Coral Reef Conservation Program (Coral Reef Conservation Program - CRCP)
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS 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 > Microbiota > Blue-green Algae
  • 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 > Turf Algae
  • EARTH SCIENCE > Biosphere > Zoology > Corals
  • EARTH SCIENCE > Biosphere > Zoology > Corals > Coral Diseases > Bleaching
  • EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment
  • EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Benthos Analysis
  • EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Benthos Analysis > Quadrat Monitoring > Photograph 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 > Benthos Analysis > Transect Monitoring > Linear Transect (point)
  • EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > In Situ Biological
  • EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Photographic Analysis
  • EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Rapid Assessment Studies
  • EARTH SCIENCE > Biosphere > Zoology > Mollusks > Tridacna
  • EARTH SCIENCE > Biosphere > Zoology > Sponges
  • 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 > Hard Coral Cover Live percentage
  • EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Octocoral Cover
  • EARTH SCIENCE > Oceans > Marine Biology > Coral
  • EARTH SCIENCE > Oceans > Marine Biology > Coral Communities
  • EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates
  • EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates > Macroinvertebrates
  • EARTH SCIENCE > Oceans > Marine Biology > Marine Plants > Seagrass
Global Change Master Directory (GCMD) Science Keywords Provider Keywords
  • bleaching
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Contributing Data Centers
  • 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
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Provider Instruments
  • CoralNet
Place keywords NODC SEA AREA NAMES THESAURUS CoRIS Place Thesaurus
  • COUNTRY/TERRITORY > United States of America > Hawaii > Hawaii > Hawaii (21N160W0000)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Hawaii > Hawaii Island (19N155W0003)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > French Frigate Shoals (24N166W0001)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Kure Atoll (28N178W0001)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Lisianski Island (25N173W0001)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Northwestern Hawaiian Islands (28N178W0000)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Oahu (21N157W0003)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Pearl and Hermes Reef (27N176W0001)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Maui > Lanai Island (20N156W0002)
  • COUNTRY/TERRITORY > United States of America > Hawaii > Maui > Maui Island (20N156W0004)
  • COUNTRY/TERRITORY > United States of America > Hawaiian Islands (21N157W0027)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands (21N157W0027)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii > Hawaii (21N160W0000)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii Island > Hawaii Island (19N155W0003)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Lanai Island > Lanai Island (20N156W0002)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Maui Island > Maui Island (20N156W0004)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu Island > Oahu (21N157W0003)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands (28N178W0000)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > French Frigate Shoals (24N166W0001)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Kure Atoll (28N178W0001)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Lisianski Island (25N173W0001)
  • OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Pearl and Hermes Reef (27N176W0001)
Global Change Master Directory (GCMD) Location Keywords Provider Place Names
  • Papahanaumokuakea Marine National Monument
Project keywords NODC PROJECT NAMES THESAURUS CRCP Project
  • 31283
  • Hawai'i coral bleaching assessment and analysis
Provider Project Names
  • Coral Reef Conservation Program (CRCP)
  • National Coral Reef Monitoring Program (NCRMP)
  • Pacific Reef and Assessment Monitoring Program (Pacific RAMP - NOAA/NMFS/CRED)
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (2022). Benthic Cover Derived from Benthic Images Collected Across the Hawaiian Archipelago from 2019-08-27 to 2019-11-14 During a Bleaching Event (NCEI Accession 0259266). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0259266. 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
  • 2022-09-08T19:53:19Z - NCEI Accession 0259266 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: BENTHIC COMMUNITIES (measured); Units: unitless; Observation Category: benthic; Sampling Instrument: photograph; Sampling and Analyzing Method: TIER 1 and TIER 2: Benthic habitat images from photoquadrat surveys collected at stratified random and fixed sites (30 images per site) during reef fish (Ayotte et al. 2015) and coral (Winston et al. 2020) surveys were quantitatively analyzed using the web-based, machine-learning, image annotation tool, CoralNet (https://coralnet.ucsd.edu; Beijbom et al. 2015) following Lozada-Misa et al. (2017). Ten points were randomly overlaid on each image and human analysts identified the organism or type of substrate beneath, with 300 annotations (points) generated per site. Benthic elements falling under each point were identified to genus/morphology for hard corals, and to genus/functional group for algae, invertebrates, and other taxa. The analysis resulted in three levels of benthic community data, including taxa group (Tier 1: hard coral, soft coral, macroalgae, turf algae, etc.), morphology (Tier 2: massive, branching, upright macroalgae, etc.), and genus (Tier 3).; Data Quality Method: ACCURACY: 1) Each analyst is required to complete training and a calibration exercise before approved to analyze (classify/annotate) images, 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 number 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..
  • Parameter or Variable: SPECIES IDENTIFICATION (measured); Units: unitless; Observation Category: benthic; Sampling Instrument: photograph; Sampling and Analyzing Method: TIER 3: Benthic habitat images from photoquadrat surveys collected at stratified random and fixed sites (30 images per site) during reef fish (Ayotte et al. 2015) and coral (Winston et al. 2020) surveys were quantitatively analyzed using the web-based, machine-learning, image annotation tool, CoralNet (https://coralnet.ucsd.edu; Beijbom et al. 2015) following Lozada-Misa et al. (2017). Ten points were randomly overlaid on each image and human analysts identified the organism or type of substrate beneath, with 300 annotations (points) generated per site. Benthic elements falling under each point were identified to genus/morphology for hard corals, and to genus/functional group for algae, invertebrates, and other taxa. The analysis resulted in three levels of benthic community data, including taxa group (Tier 1: hard coral, soft coral, macroalgae, turf algae, etc.), morphology (Tier 2: massive, branching, upright macroalgae, etc.), and genus (Tier 3). For this specific dataset, hard coral was also classified as either non-bleached or bleached at the genus level. Details are described in the CoralNet labelset also included in this data package.; Data Quality Method: ACCURACY: 1) Each analyst is required to complete training and a calibration exercise before approved to analyze (classify/annotate) images, 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 number 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
Platform
  • NOAA Ship Rainier
Last Modified: 2023-03-15T01:21:47Z
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