Benthic Cover Derived from Analysis of Benthic Images Collected in the Hawaiian Archipelago During the 2019 Bleaching Event

Description

The data described here result from benthic photo-quadrat surveys conducted along transects at stratified random sites (StRS), as well as climate stations and permanent sites, surveyed across the Hawaiian Archipelago during the 2019 bleaching event. 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 The data from the benthic cover surveys can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive.

Resources

Name Format Description Link
0 Pacific Island Fisheries Science Center homepage https://www.pifsc.noaa.gov
0 Online Resource https://www.fisheries.noaa.gov/feature-story/surveys-assess-2019-hawaii-coral-bleaching-event
0 Image analysis data derived from photoquadrat benthic images collected at stratified random sites (StRS) across the Main Hawaiian Islands by the NOAA Ecosystem Sciences Division (ESD) during the 2019 bleaching surveys http://accession.nodc.noaa.gov/0259266
0 Labelset used in CoralNet to annotate benthic photo-quadrat imagery collected during the 2019 bleaching event in Hawaii. http://accession.nodc.noaa.gov/0259266
0 The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
0 Image analysis data derived from photoquadrat benthic images collected at stratified random sites (StRS) and fixed sites across the Northwestern Hawaiian Islands by the NOAA Ecosystem Sciences Division (ESD) during the 2019 bleaching surveys http://accession.nodc.noaa.gov/0259266
0 View the complete metadata record on InPort for more information about this dataset. https://www.fisheries.noaa.gov/inport/item/59195
0 CoralNet Home Page http://coralnet.ucsd.edu/
33 NOAA Data Management Plan for this record on InPort. https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/59195.pdf

Tags

  • hawaiian islands (21n157w0027)
  • lanai island (20n156w0002)
  • crep
  • lanai island
  • coral cover
  • doc/noaa/nmfs/pifsc
  • united states of america
  • reef monitoring and assessment
  • aquatic habitat
  • corals
  • north pacific ocean
  • tridacna
  • benthic habitat
  • coral reef ecosystem division
  • benthic
  • marine plants
  • oahu (21n157w0003)
  • pifsc
  • photograph analysis
  • in situ biological
  • maui
  • biosphere
  • photographic analysis
  • ocean and climate change
  • oceans
  • maui island (20n156w0004)
  • algae
  • mhi
  • coral reef conservation program
  • marine invertebrates
  • reef and/or bottom regime - percent cover
  • maui island
  • hard coral cover
  • papahanaumokuakea marine national monument
  • noaa
  • numeric data sets
  • algal cover
  • hawaii
  • nmfs
  • hard coral cover live percentage
  • macroinvertebrates
  • coralnet
  • sponges
  • oahu island
  • quadrat monitoring
  • us doc
  • rainier
  • hawaii island (19n155w0003)
  • pacific islands fisheries science center
  • hawaii (21n160w0000)
  • u.s. department of commerce
  • earth science
  • benthic biology
  • national marine fisheries service
  • french frigate shoals (24n166w0001)
  • nwhi
  • seagrass
  • vegetation
  • hawaiian islands
  • hawaii coral bleaching assessment and analysis
  • crustose coralline algae
  • pearl and hermes reef (27n176w0001)
  • marine biology
  • coral communities
  • cred
  • mollusks
  • encrusting macroalgae
  • honolulu
  • northwestern hawaiian islands (28n178w0000)
  • bleaching
  • microbiota
  • benthos analysis
  • central pacific ocean
  • point counts
  • blue-green algae
  • transect monitoring
  • kure atoll (28n178w0001)
  • reef habitat
  • coral reef ecology
  • ocean basin
  • main hawaiian islands
  • ecosystem sciences division
  • coral
  • esd
  • coastal processes
  • octocoral cover
  • 31283
  • northwestern hawaiian islands
  • zoology
  • coral reefs
  • pacific ocean
  • rapid assessment studies
  • country/territory
  • belt transect
  • hawaii island
  • turf algae
  • lisianski island (25n173w0001)
  • coral reef studies
  • coral reef ecosystem program

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