Fish, invertebrate and benthic surveys along the West coast of Hawaii from 2003-03-01 to 2017-03-01 (NCEI Accession 0164965)

Metadata Updated: February 27, 2019

Fish & Invertebrate surveys: At each permanent monitoring site (26 at present), fishes and urchins are recorded on 4 fixed 25m transects. Each transect is surveyed by a diver of divers who collectively record fishes within, entering or passing across the belt transect with combined dimensions (both divers) of 25m4m. On reaching the site, divers first attach lines to pins fixed at the transect start and end points. After all transect lines are attached, divers begin the survey. Fishes are counted by means of two passes – mid-water and roving species are recorded on the outward swim; urchins and all other fish species are recorded in the return swim, during which divers swim more slowly carefully looking for smaller site-attached and semi cryptic organisms that make up the bulk of abundance at most sites. Divers always swim in parallel, only recording fishes and urchins on their side of the transect line. Thus, each diver surveys an area of 25m2m, and collectively the transect area is 100 m2. Divers take care not to count fishes moving across the transect line from the other divers portion of the transect.

Benthic surveys: Benthic cover is assessed at all monitoring sites, typically during the spring every three years (or annually following an anticipated substantial change in benthic cover). Benthic images (0.30 m2) are taken at each meter along four 25 m transects at each site. Benthic taxa located below 20 stratified random points in each image are identified to the lowest possible taxonomic level using Coral Point Count with Excel extensions (CPCe) software, version 4.1. Relative change in benthic cover by category is calculated for each transect, then averaged by site.

Coral bleaching/ health surveys: In response to extensive coral bleaching in West Hawaii during the spring/summer of 2015, coral bleaching/ health surveys were conducted at 8 permanent monitoring sites from 9 October to 13 November 2015 using methods described in Couch et al. 2014. Three 10 m2 belt transects were surveyed per site, and all coral colonies (≥ 5cm diameter) within each belt were scored for bleaching/health condition and severity. During surveys, a progression of algal turf presence on bleached coral colonies was also scored (recorded in this dataset under the heading "TF"). The severity of each condition and algal turf presence was scored based on the percent of the colony affected. Additional coral bleaching/ health surveys will be conducted as needed.

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Dates

Metadata Date September 14, 2018
Metadata Created Date February 7, 2018
Metadata Updated Date February 27, 2019
Reference Date(s) January 19, 2018 (publication), September 13, 2018 (revision)
Frequency Of Update asNeeded

Metadata Source

Harvested from NOAA CSW Harvest Source

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Additional Metadata

Resource Type Dataset
Metadata Date September 14, 2018
Metadata Created Date February 7, 2018
Metadata Updated Date February 27, 2019
Reference Date(s) January 19, 2018 (publication), September 13, 2018 (revision)
Responsible Party (Point of Contact)
Contact Email
Access Constraints Cite as: Walsh, William; Kramer, Katherine; Williams, Ivor (2018). Fish, invertebrate and benthic surveys along the West coast of Hawaii from 2003-03-01 to 2017-03-01 (NCEI Accession 0164965). Version 2.2. NOAA National Centers for Environmental Information. Dataset. [access date], 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.
Bbox East Long -155.849
Bbox North Lat 20.16
Bbox South Lat 19.0767
Bbox West Long -156.056
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description Preview graphic
Graphic Preview File https://data.nodc.noaa.gov/cgi-bin/gfx?id=gov.noaa.nodc:0164965
Graphic Preview Type PNG
Guid gov.noaa.nodc:0164965
Harvest Object Id 64587920-f6cc-4082-9773-a0a27255b4a7
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence accessLevel: Public
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2003-03-01
Temporal Extent End 2017-03-01

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