Majuro Atoll, Republic of the Marshall Islands coral reef ecosystems mapping report


Autoria(s): Kendall , Matthew; Battista, Timothy; Menza, Charles
Data(s)

01/01/2012

Resumo

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 square meters. 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 square kilometers. 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 management activities on Majuro reef ecosystems including inventory, monitoring, conservation, and sustainable development applications.

Formato

application/pdf

Identificador

http://aquaticcommons.org/14701/1/majuromappingreport.pdf

Kendall , Matthew and Battista, Timothy and Menza, Charles (2012) Majuro Atoll, Republic of the Marshall Islands coral reef ecosystems mapping report. Silver Spring, MD, NOAA/National Centers for Coastal Ocean Science, 19pp. (NOAA Technical Memorandum NOS NCCOS, 144)

Idioma(s)

en

Publicador

NOAA/National Centers for Coastal Ocean Science

Relação

http://aquaticcommons.org/14701/

http://ccma.nos.noaa.gov/ecosystems/coralreef/majuro/majuromappingreport.pdf

Palavras-Chave #Ecology #Fisheries #Management
Tipo

Monograph or Serial Issue

NonPeerReviewed