Summit-to-sea mapping and change detection using satellite imagery: tools for conservation and management of coral reefs
Rev. biol. trop
;
53(supl.1): 185-193, maio 2005. ilus, tab
Article
in English
| LILACS
| ID: lil-456509
ABSTRACT
Continuous summit-to-sea maps showing both land features and shallow-water coral reefs have been completed in Puerto Rico and the U.S. Virgin Islands, using circa 2000 Landsat 7 Enhanced Thematic Mapper (ETM+) Imagery. Continuous land/sea terrain was mapped by merging Digital Elevation Models (DEM) with satellite-derived bathymetry. Benthic habitat characterizations were created by unsupervised classifications of Landsat imagery clustered using field data, and produced maps with an estimated overall accuracy of>75% (Tau coefficient >0.65). These were merged with Geocover-LC (land use/land cover) data to create continuous land/ sea cover maps. Image pairs from different dates were analyzed using Principle Components Analysis (PCA) in order to detect areas of change in the marine environment over two different time intervals 2000 to 2001, and 1991 to 2003. This activity demonstrates the capabilities of Landsat imagery to produce continuous summit-to-sea maps, as well as detect certain changes in the shallow-water marine environment, providing a valuable tool for efficient coastal zone monitoring and effective management and conservation
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Index:
LILACS (Americas)
Main subject:
Adaptation, Biological
/
Environmental Monitoring
/
Satellite Communications
/
Ecosystem
/
Conservation of Natural Resources
/
Anthozoa
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Animals
Language:
English
Journal:
Rev. biol. trop
Journal subject:
Biology
/
Tropical Medicine
Year:
2005
Type:
Article
Affiliation country:
United States
Institution/Affiliation country:
National Oceanic and Atmospheric Administration/US
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