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Hawaii Coral Bleaching Collaborative: surveys for percent and severity of bleached coral cover across the Hawaiian Archipelago from August 20 to December 7, 2019

Published by Pacific Islands Fisheries Science Center | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2021-01-01T00:00:00.000+00:00
The data described here result from coral bleaching surveys across the Hawaiian Archipelago from August 20 to December 7, 2019. The data provide information on live coral cover and the percentage and average severity that was bleached, as well as taxa-specific metrics (live cover and the percentage and severity that was bleached). The data were collected during a multi-institutional effort by the Hawaii Coral Bleaching Collaborative (HCBC) to build a comprehensive dataset of the spatial extent and severity of bleaching in the Hawaiian Archipelago during the peak of the forecasted 2019 coral bleaching event. This dataset is a compilation of data supplied by: NOAA Fisheries Ecosystem Sciences Division (ESD); State of Hawaii Department of Land and Natural Resources (DLNR), Division of Aquatic Resources (DAR); Scripps Institution of Oceanography (SIO), Sandin Lab; Arizona State University (ASU), Asner Lab; National Park Service (NPS), Pacific Island Inventory & Monitoring Network (PACN); Hawaii Institute of Marine Biology (HIMB), Coral Reef Ecology Lab; and The Nature Conservancy (TNC) of Hawaii. Coral bleaching surveys were conducted at both fixed and random sites using varying methods per institution that included: rapid visual assessments, photoquadrat assessments, and transect-intercept assessments. Metrics that were recorded include live coral cover, the percentage of living coral that was bleached, and the average severity of bleached corals. Surveys conducted in the Main Hawaiian Islands were conducted during shore-based missions, whereas surveys in the Northwestern Hawaiian Islands were performed opportunistically during the regularly scheduled NOAA National Coral Reef Monitoring Program (NCRMP) mission. Random sites were selected by each institution in their own ways, as follows: - NOAA ESD: A stratified random sampling (StRS) design was used; the StRS method effectively reduces estimate variance through stratification using environmental covariates and by sampling more sites rather than sampling more transects at a site - DAR: Randomly chose sites by covering shorelines at depths from 1-15ft with hard bottom substrate, and aligned transects with shoreline access points - TNC: Sites were randomly selected using ARC-GIS within a polygon bounded by 15' and 50' depth clines and clipped to hard bottom habitat, based on NOAA habitat maps - HIMB: Method described in lineage source - ASU: Sites were selected based on two factors: (1) bleaching reports sent into hawaiicoral.org (ASU, DAR, NOAA website) to locate potential hotspots on the Big Island; and (2) areas not reported as potential coldspots. At each selected "site", randomly selected location GPS points constrained only by isobaths of 5, 10, and 15m - PACN: Method described in lineage source

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31283 Coral bleaching assessment and analysis Numeric Data Sets > Biology EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat 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 > Transect Monitoring > Belt Transect EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > In Situ Biological EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Rapid assessment studies 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 > Coral Cover EARTH SCIENCE > Oceans > Marine Biology > Coral CORAL - BLEACHING CORAL - SPECIES IDENTIFICATION REEF AND/OR BOTTOM REGIME - PERCENT COVER survey - biological survey - swimmer/diver RAINIER VARIOUS SMALL VESSELS CORAL REEF STUDIES Coral Reef Conservation Program US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division 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 > Hawaii > Kauai Island (22N159W0001) COUNTRY/TERRITORY > United States of America > Hawaii > Hawaii > Molokai Island (21N157W0001) 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 > 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 > Kauai Island > Kauai Island (22N159W0001) 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 > Molokai Island > Molokai Island (21N157W0001) OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu Island > Oahu (21N157W0003) 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) North Pacific Ocean Papahanaumokuakea Marine National Monument ASU Arizona State University CRED CREP Coral Bleaching Coral Reef Ecosystem Division Coral Reef Ecosystem Program DAR DLNR Department of Land and Natural Resources Division of Aquatic Resources ESD Ecosystem Sciences Division HIMB Hawaii Institute of Marine Biology NPS National Park Service PACN PIFSC Pacific Island Inventory & Monitoring Network Pacific Islands Fisheries Science Center Photoquadrat Assessments REA Rapid Ecological Assessments SIO Scripps Institute of Oceanography TNC The Nature Conservancy of Hawaii Transect-Intercept Assessments belt transect MHI Main Hawaiian Islands NWHI Northwestern Hawaiian Islands PMNM DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce Ocean and Climate Change

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