|
Description:
Title:
Majuro Atoll, Republic of the Marshall Islands coral reef ecosystems mapping report
Author(s):
Kendall, Matthew S.
Battista, Timothy Adams
Menza, Charles W. (Charles William)
United States, National Ocean Service
National Centers for Coastal Ocean Science (U.S.)
United States, National Oceanic and Atmospheric Administration,
Coral Reef Conservation Program (U.S.)
Corporate Name:
United States, National Ocean Service
National Centers for Coastal Ocean Science (U.S.)
United States, National Oceanic and Atmospheric Administration,
Coral Reef Conservation Program (U.S.)
Dates of Publication:
2012
Abstract:
Digital maps of the coral reef ecosystem (<~30m deep) of Majuro Atoll, Republic of the Marshall Islands, were created through visual interpretation of remote sensing imagery. Digital Globe's Quickbird II satellite images were acquired between 2004 and 2006 and georeferenced to within 1.6 m of their true positions. Reef ecosystem features were digitized directly into a GIS at a display scale of 1:4000 using a minimum feature size of 1000 m². Benthic features were categorized according to a classification scheme with attributes including zone (location, such as lagoon or forereef, etc.), structure (bottom type, such as sand or patch reef, etc.) and percent hard bottom. Ground validation of habitat features was conducted at 311 sites in 2009. Resulting maps consisted of 1829 features covering 366 km². Results demonstrate that reef zones occurred in a typical progression of narrow bands from offshore, though forereef, reef flat, shoreline, land, backreef, and lagoon habitats. Lagoon was the largest zone mapped and covered nearly 80% of the atoll, although much of it was too deep to have structures identified from the satellite imagery. Dominant habitat structures by area were pavement and aggregate reef, which covered 29% and 18% of the mapped structures, respectively. Based on the number of features, individual and aggregated patch reefs comprised over 40% of the features mapped. Products include GIS based maps, field videos and pictures, satellite imagery, PDF atlas, and this summary report. Maps and associated data can be used to support science and man a gement activities on Majuro reef ecosystems including inventory, monitoring, conservation, and sustainable development applications".
Keywords:
Benthos
Coral reef conservation
Coral reef ecology
Coral reef management
Coral reefs and islands
Habitat
Maps
Monitoring
Remote sensing
Place Keywords:
Marshall Islands
Majuro Atoll
Local Corporate Name:
NOS (National Ocean Service)
NCCOS (National Centers for Coastal Ocean Science)
CoRIS (Coral Reef Information System)
Type of Resource:
Technical Memorandum
Genre:
NOAA technical memorandum NOS NCCOS ; 144
Note:
Digital maps of the coral reef ecosystem (<~30m deep) of Majuro Atoll, Republic of the Marshall Islands, were created through visual interpretation of remote sensing imagery. Digital Globe's Quickbird II satellite images were acquired between 2004 and 2006 and georeferenced to within 1.6 m of their true positions. Reef ecosystem features were digitized directly into a GIS at a display scale of 1:4000 using a minimum feature size of 1000 m². Benthic features were categorized according to a classification scheme with attributes including zone (location, such as lagoon or forereef, etc.), structure (bottom type, such as sand or patch reef, etc.) and percent hard bottom. Ground validation of habitat features was conducted at 311 sites in 2009. Resulting maps consisted of 1829 features covering 366 km². Results demonstrate that reef zones occurred in a typical progression of narrow bands from offshore, though forereef, reef flat, shoreline, land, backreef, and lagoon habitats. Lagoon was the largest zone mapped and covered nearly 80% of the atoll, although much of it was too deep to have structures identified from the satellite imagery. Dominant habitat structures by area were pavement and aggregate reef, which covered 29% and 18% of the mapped structures, respectively. Based on the number of features, individual and aggregated patch reefs comprised over 40% of the features mapped. Products include GIS based maps, field videos and pictures, satellite imagery, PDF atlas, and this summary report. Maps and associated data can be used to support science and man a gement activities on Majuro reef ecosystems including inventory, monitoring, conservation, and sustainable development applications".
2012
NOS (National Ocean Service)
NCCOS (National Centers for Coastal Ocean Science)
CoRIS (Coral Reef Information System)
Library
Public Domain
1936
URL:
|
