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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2005
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| Online Access: | https://www.redalyc.org/articulo.oa?id=44920889019 |
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Table of Contents:
- Assessing the accuracy of acoustic seabed classification for mapping coral reef environments in South Florida (Broward County, USA) Ryan P. Moyer Bernhard Riegl Kenneth Banks Richard E. Dodge Biología Spatial prediction Accuracy assessment Coral reef community Broward County Florida Acoustic seabed classification The Atlantic coast of Broward County, Florida (USA) is paralleled by a series of progressively deeper, shore-parallel coral reef communities. Two of these reef systems are drowned early Holocene coral reefs of 5 ky and 7 ky uncorrected radiocarbon age. Despite the ease of access to these reefs, and their major contribution to the local economy, accurate benthic habitat maps of the area are not available. Ecological studies have shown that different benthic communities (i.e. communities composed of different biological taxa) exist along severalspatial gradients on all reefs. Since these studies are limited by time and spatial extent, acoustic surveys with theQTCView V bottom classification system based on a 50 kHz transducer were used as an alternative method ofproducing habitat maps. From the acoustic data of a 3.1 km2 survey area, spatial prediction maps were createdfor the area. These were compared with habitat maps interpreted from in situ data and Laser Airborne DepthSounder (LADS) bathymetry, in order to ground-truth the remotely sensed data. An error matrix was used toquantitatively determine the accuracy of the acoustically derived spatial prediction model against the mapsderived from the in situ and LADS data sets. Confusion analysis of 100 random points showed that the systemwas able to distinguish areas of reef from areas of rubble and sand with an overall accuracy of 61%. When askedto detect more subtle spatial differences, for example, those between distinct reef communities, the classification was only about 40% accurate. We discuss to what degree a synthesis of acoustic and in situ techniques can provide accurate habitat maps in coral reef environments, and conclude that acoustic methods were able to reflectthe spatial extent and composition of at least three different biological communities. 2005 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44920889019 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1 Vol.53