Benthic Mapping Using Sonar, Video Transects, and an Innovative Approach to Accuracy Assessment: A Characterization of Bottom Features in the Georgia Bight
| Autor: | Reed Bohne, Olaf P. Jensen, Greg McFall, Mark E. Monaco, Don Field, Clark R. Alexander, Matthew S. Kendall |
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| Rok vydání: | 2005 |
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| Zdroj: | Journal of Coastal Research. 216:1154-1165 |
| ISSN: | 1551-5036 0749-0208 |
| DOI: | 10.2112/03-0101r.1 |
| Popis: | Benthic maps provide the spatial framework for many science and management activities in coastal areas such as identification and protection of fish distributions and associated habitat as well as for monitoring changes in benthos and fish communities. To meet this need at Gray's Reef National Marine Sanctuary off the Georgia, U.S.A., coast, we created fine-scale benthic maps by visual interpretation of sonar imagery within a geographic information system. The major bottom types in the sanctuary—flat sand, rippled sand, hard bottom that is sparsely colonized with sessile invertebrates, and densely colonized hard bottom—were delineated through combined analysis of backscatter from side-scan sonar, bathymetry from multibeam sonar, scuba surveys, and video transects. Maps showed that unconsolidated sediments cover 75% of the bottom of this region; 8% occurs as flat sand plains with obvious burrowing and reworking of surface material by mobile benthic invertebrates, whereas 67% occurs as rippled sand... |
| Databáze: | OpenAIRE |
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