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General Information

File Identifier:	gov.noaa.nmfs.inport:46886
Metadata Date Stamp:	2020-04
Organization:	Pacific Islands Fisheries Science Center
Organization Role:	resourceProvider

Identification Information

Title:	Benthic Habitat Maps for Rose Atoll Marine National Monument in American Samoa from 2004 to 2010
Dataset Language:	eng; US
Abstract:	Benthic habitat maps for Rose Atoll, American Samoa were derived from high resolution, multispectral satellite imagery for 2004, 2006, and 2010. The benthic habitat maps for 2004 were previously generated by NOAA's NCCOS's BioGeography Branch before this project, and they were gathered from NOAA's 2005 publication (NCCOS, 2005). The benthic habitat maps for 2006 and 2010 were generated in this project. Bathymetry (water depth) from 0 to 30 meters was derived from satellite imagery for 2006 and 2010 and validated with multibeam and singlebeam depth data, respectively. Eight geomorphological features of the seafloor (Mean Depth, Standard Deviation of Depth, Slope, Slope of Slope, Rugosity, Curvature, Plan Curvature, and Profile Curvature) were derived from the bathymetry for 2006 and 2010. The geomorphological features were used to perform a Principal Component Analysis (PCA), and the first three Principal Components were used in combination with classified benthic imagery (underwater images of the seafloor) to classify the underwater habitat of the inner lagoon and sloping reef areas of Rose Atoll. The final benthic habitat maps consist of two maps for each of the three years. The first map shows the four dominant cover types that make up the shallow water benthic habitat on Rose Atoll, which are coral, coralline algae, macroalgae, and turf algae. The area in square kilometers of each cover types is provided. The purpose of the first map is to show the most abundant biological cover types in the benthic habitat. The second map show the percentages of the four dominant cover types, which are divided into three bins: 10%-<50% coverage, 50%-<90% coverage, and 90%-100% coverage. The area in square kilometers of each of the cover types is also provided. The purpose of the second map is to examine the smaller changes in the benthic habitat over the three years.

Data Theme

Theme Topics:

Biology and Ecology, Elevation and Derived Products, Oceans and Estuaries

Spatial Domain

West Bounding Longitude:	-168.18
South Bounding Latitude:	-14.57
East Bounding Longitude:	-168.13
North Bounding Latitude:	-14.52

Data Quality Information

Scope (quality information applies to):

Dataset

Data History:

To create the benthic habitat maps showing Dominant Cover Types and Percentages of Dominant Cover Types of the shallow water benthic habitat of Rose Atoll for 2006 and 2010, the Maximum Likelihood Supervised Classification (MLC) tool in ArcGIS for Desktop was used to classify the three bands from the Principle Component Analysis (PCA) performed on the eight derived geomorphological features of the seafloor.

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/amsamoa/benthichabitatlayers/ROS_BHM_ALL.zip
Distribution Link Function:	Download

Metadata Reference Information

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