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General Information

File Identifier:	gov.noaa.nmfs.inport:32811
Metadata Date Stamp:	2020-04
Organization:	Pacific Islands Fisheries Science Center
Organization Role:	resourceProvider

Identification Information

Title:	Dominant Benthic Structure and Biological Cover Habitat Maps for West Maui and West Hawaii
Dataset Language:	eng; US
Abstract:	Benthic habitat maps depict dominant substrate type and biological cover in depths between 0 and ~150 m for two priority sites in the Main Hawaiian Islands; the NOAA Habitat Blueprint West Hawaii Focus Area (WHFA) and the Hawaii Division of Aquatic Resources (DAR) West Maui priority watersheds. The primary data source for these maps was a 5-m resolution bathymetry synthesis grid, collected from a number of sources and maintained by the University of Hawaii at Manoa (UH) Hawaii Mapping Research Group (HMRG). Geomorphic derivatives of slope, slope of slope, rugosity and curvature were created from the bathymetry grid using the Benthic Terrain Modeler (http://esriurl.com/5754) in ArcGIS. New optical seafloor imagery was collected by the NOAA Coral Reef Ecosystem Program (CREP) to produce these maps, and seafloor imagery was also provided from a number of partners including the United States Geological Survey (USGS) the Nature Conservancy, NOAA Biogeography group and the Hawaii Institute of Marine Biology. All images were visually analyzed by CREP to classify dominant substrate type and biological cover. A Principle Component Analysis performed in ArcGIS removed highly correlated information from the suite of geomorphic surfaces derived from the bathymetry synthesis grid. This was followed by an unsupervised classification using the Iso Cluster Classification tool in ArcGIS. The resulting image was examined and manually corrected using the classification data from the analyzed seafloor imagery as validation. The resulting benthic habitat map delineates eight dominant substrates (Complex Reef, Boulder, Rubble, Mixed Substrate, Pavement, Sand, Mud, and Manmade) and six dominant biological cover types (Coral, Coralline Algae, Turf Algae, Macroalgae, Uncolonized and Unclassified) that extend from the shoreline to ~150 m.

Browse Graphic

Browse Graphic URL:	https://www.habitatblueprint.noaa.gov/storymap/hfa/hfa_pages/images/westHawaii/location_map.jpg
Browse Graphic Caption:	NOAA Habitat Blueprint West Hawaii Focus Area
Browse Graphic Type:	JPG

Data Theme

Theme Topics:

Biology and Ecology, Oceans and Estuaries

Spatial Domain

West Bounding Longitude:	-156.100504
South Bounding Latitude:	19.772429
East Bounding Longitude:	-155.822838
North Bounding Latitude:	20.061727

Data Quality Information

Scope (quality information applies to):	Dataset
Data History:	The Iso Cluster Unsupervised Classification tool was used to classify the three-band Principle Component Analysis (PCA) image into distinct structure and cover classes. The unsupervised classification produced a delineated image of substrate and cover of the seafloor across the entire West Hawaii and West Maui priority areas.

Contact Information

Address:	1845 Wasp Blvd.
City:	Honolulu
State:	HI
Postal Code:	96818
Email:	annette.desrochers@noaa.gov
Telephone:	(808)725-5461

Distribution Information

Format Name:	Zip
Distribution Link:	ftp://ftp.soest.hawaii.edu/pibhmc/website/data/mhi/benthichabitatlayers/WestHawaii_dominant.zip
Distribution Link Function:	Download

Metadata Reference Information

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