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General Information

File Identifier:	gov.noaa.nodc:0283598
Metadata Date Stamp:	2023-10
Organization:	NOAA National Centers for Environmental Information
Organization Role:	custodian

Identification Information

Title:

Coral Bleaching & Recovery Observations using Structure-from-Motion (SfM) Models from Main Hawaiian Islands Fixed Sites Surveyed from 2019 to 2021 (NCEI Accession 0283598)

Abstract:

Coral adult demographic data described in this dataset are derived from the GIS analysis of benthic photomosaic imagery collected at established fixed sites to assess bleaching recovery from 2019-2021 in the Main Hawaiian Islands. This data includes coral species identification, bleaching extent and severity, colony diameter, perimeter, and planar size. The source imagery was collected using a Structure from Motion (SfM) approach during in-water surveys conducted by divers and is documented and described separately. The data was collected by the NOAA Pacific Islands Fisheries Science Center (PIFSC) Ecosystem Sciences Division (ESD; formerly the Coral Reef Ecosystem Division) and [on Hawaii Island] in partnership with State of Hawaii Department of Land and Natural Resources (DLNR), Division of Aquatic Resources (DAR) during the 2019 bleaching event in the Main Hawaiian Islands, and in subsequent years (2020, 2021) to assess recovery. Benthic imagery collected at permanent sites was generated into 3D dense point clouds (DPCs) using Agisoft Metashape software. DPCs from the same site, but different collection dates were converted into 2D orthomosaics and scaled, oriented and aligned together. Orthomosaics were sub-sampled by randomly distributing quadrats throughout the orthomosaic. Quadrat location was conserved across all orthomosaics associated with the same permanent site. Target coral species were identified within each quadrat and their perimeters were annotated until a sufficient sample size of each species was recorded. Six species were assessed: Montipora capitata (MCAP), Montipora patula (MPAT), Porites lichen (PLIC), Porites lobata (PLOB), Porites lutea (PLUT), and Pocillopora meandrina (PMEA). Annotations included coral species identification, maximum diameter measurement, planar area measurement, morphology, and, for sites surveyed in 2019, bleaching extent and bleaching severity. Each coral was annotated at the patch level, and patches composing individual colonies, also known as genets, were assigned a unique genet ID number. The same coral patches were tracked over each time point, unless mortality of a coral patch occurred.

Browse Graphic

Browse Graphic URL:	https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0283598
Browse Graphic Caption:	Preview graphic
Browse Graphic Type:	PNG

Data Theme

Theme Topics:

Environment and Conservation, Oceans and Estuaries, Imagery and Base Maps, Biology and Ecology

Spatial Domain

West Bounding Longitude:	-158.0667
South Bounding Latitude:	19.42335
East Bounding Longitude:	-155.8488
North Bounding Latitude:	21.47959

Data Quality Information

Scope (quality information applies to):

Dataset

Contact Information

Email:	ncei.info@noaa.gov
Contact Website:	https://www.ncei.noaa.gov/contact

Metadata Reference Information

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