Search for coral reef related articles, reports and other publications. This library includes the publications from International Coral Reef Symposium (ICRS) Proceedings, Coral Reefs Status Report, Reef Fisheries Portal and International Tropical Marine Ecosystems Management Symposium (ITMEMS) Symposium Papers. Please specify your search criteria, and indicate how many results are to be displayed.
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1. coral and reefs
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Search for records which contain words coral and not acropora.
Latest 5 Additions
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1.
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Stetson, P., B. Shank and P.S. Lobel,
2008
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Mapping reef structure and bathymetry in Belize using Cobra-Tac
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Ref ID
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27572
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Author
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Stetson, P., B. Shank and P.S. Lobel
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Year
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2008
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Title
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Mapping reef structure and bathymetry in Belize using Cobra-Tac
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Keywords
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11ICRS, reef mapping, underwater navigation, Cobra-Tac, Doppler device
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Caption
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Abstract
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The Cobra-Tac underwater navigation system (RJE Int, Irvine, CA) was evaluated for its mapping capabilities in shallow (< 20 m) hard- and soft-bottom reef habitats. This study was conducted on the lagoon reefs around Wee Wee Caye, Belize. The Cobra-Tac was created as an autonomous underwater diving navigation system that measures depth and altitude for hydrographic and position mapping. It computes its geographic position underwater using a fluxgate compass and a Doppler velocity log. Our objective was to assess the Cobra-Tac’s effectiveness as a measuring tool for the rugosity of reef structure and for mapping bathymetry. We found that the accuracy, density, and breadth of data collection are dependent upon speed of travel and altitude above the bottom. Also, multiple passes over the desired area may be necessary to best define the underwater topography in detailed resolution. One advantage over boat-based systems is that Cobra-Tac is diver operated and can be taken into shallow and complex habitats. Provided that the limitations of the system are understood, the Cobra-Tac is a powerful tool for easily mapping the topography of small-scale and shallow marine systems. It produces intelligible and informative bathymetric maps within 30 minutes of data download that are then ready to be used to delineate transects for biotic surveys.
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Online Documents
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No online document
- Copies of papers downloaded from ReefBase may be used and reproduced for non-commercial purpose only.
- If you encounter any problem viewing the PDF files, please use the latest version of Adobe Reader.
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2.
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Oxenford, H.A., R. Roach and A. Brathwaite,
2008
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Large scale coral mortality in Barbados: a delayed response to the 2005 bleaching episode
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Ref ID
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27571
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Author
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Oxenford, H.A., R. Roach and A. Brathwaite
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Year
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2008
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Title
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Large scale coral mortality in Barbados: a delayed response to the 2005 bleaching episode
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Keywords
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11ICRS, coral bleaching, mortality, Barbados.
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Caption
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Abstract
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Corals in Barbados suffered widespread bleaching during the high temperature event of 2005. Six reefs were monitored for one year (October 2005 – November 2006) to determine mortality impacts and rate of recovery from this bleaching event. Five 1 x 20 m band transects and five 20 m line transects were quantitatively surveyed at each site, every four months. Bleaching prevalence dropped from a mean of 71% of colonies in October 2005 to 38% in February, to 17% in June, before rising again to 25% in November 2006. Coral mortality remained low for five months (means: 3.8% colony surface dead; or 4.8% dead cover), but rose sharply after 10 months (means: 18.7% colony surface; or 25.9% cover), eventually declining after 15 months to near ambient levels (means: 2.0% colony surface; or 6.1% cover). Like other eastern Caribbean islands, recovery from bleached condition was slow and overall mortality impact was high on both deep and shallow reefs. In contrast were the delayed onset of mortality and low incidence of coral disease. High losses in live coral cover have significant economic implications for the island which derives a major proportion of its GDP from tourism, and relies heavily on healthy reefs for coastal protection.
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Online Documents
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No online document
- Copies of papers downloaded from ReefBase may be used and reproduced for non-commercial purpose only.
- If you encounter any problem viewing the PDF files, please use the latest version of Adobe Reader.
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3.
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Marcos, S.A.C., L.T. David, M.N. Soriano,
2008
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Area-Calibrated Automation of Coral Classification for Near And Subsurface Reef Videos
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Ref ID
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27570
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Author
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Marcos, S.A.C., L.T. David, M.N. Soriano
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Year
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2008
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Title
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Area-Calibrated Automation of Coral Classification for Near And Subsurface Reef Videos
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Keywords
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11ICRS, coral classification, reef monitoring, automation, computer vision, pattern recognition
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Caption
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Abstract
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Groundwork for an area-calibrated computer-automated system for benthic classification
through underwater video is presented. Data acquisition through an underwater video camera is fast, less expensive and processing can be done in one day. Two video acquisition schemes were considered: (1) near reef videos, where height of 30 cm from the reef surface is maintained, and (2) subsurface video of a reef where the camera is fixed 0.2-0.5m below the surface. Rapid classification is implemented via downsampling a reef image into blocks. Benthic components are classified into living and nonliving categories. For near-reef videos, an overall success rate of 79% is achieved even for corals occurring in various morphologies. Color and texture features derived from video stills were used as inputs to the classifier system. For subsurface reef video, an overall recognition rate of 60 – 70% was achieved. A more accurate percent cover is obtained via an area calibration model developed. This model is based on camera optics and removes the need for an underwater reference object for area correction. The development of an automated rapid reef classification system is most promising for reef studies that need fast and frequent data acquisition of percent cover of living and nonliving components.
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Online Documents
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No online document
- Copies of papers downloaded from ReefBase may be used and reproduced for non-commercial purpose only.
- If you encounter any problem viewing the PDF files, please use the latest version of Adobe Reader.
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4.
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Dustan, P., J.E. Fauth , E. Pante, K. Banks, B. Vargas-Angel, C.A. Downs,
2008
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Using cellular diagnostics to link land-based sources of pollution with coral reef degradation in South Florida
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Ref ID
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27569
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Author
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Dustan, P., J.E. Fauth , E. Pante, K. Banks, B. Vargas-Angel, C.A. Downs
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Year
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2008
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Title
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Using cellular diagnostics to link land-based sources of pollution with coral reef degradation in South Florida
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 16)
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Keywords
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11ICRS, biomarkers, Porites astreoides, coral reef health, treated wastewater
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Caption
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Abstract
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Linkages between land-based sources of pollution and coral reef health were assessed at ecological, physiological and cellular levels at four paired inshore and offshore stations off Broward County, Florida, U.S.A.: a biomonitoring control site, a treated wastewater outfall, an inlet mouth, and a treated wastewater outfall adjacent to an inlet mouth. Live coral cover was <4% at all sites and most inshore sites clustered together because they had less bare substrate and considerable cyanobacteria (Lyngbya sp.). Cellular diagnostics revealed that the stony coral Porites astreoides at all sites was stressed compared to colonies from a more remote Bahamian site. Offshore corals exhibited higher biomarker accumulations than inshore colonies. Corals near ocean outfalls and from protected areas in the Florida Keys had diagnostic profiles consistent with treated wastewater exposure. Profiles of offshore colonies were consistent with xenobiotic detoxification. Corals regenerated from sampling lesions at the two offshore biomonitoring control sites and two other inshore sites. Regeneration rates at offshore sites near the offshore ocean outfall and shipping channel were negative. Congruence between ecological, physiological and molecular information demonstrates that using multiple bioindicators can identify linkages between land-based sources of pollution and distressed coral reefs.
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Online Documents
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No online document
- Copies of papers downloaded from ReefBase may be used and reproduced for non-commercial purpose only.
- If you encounter any problem viewing the PDF files, please use the latest version of Adobe Reader.
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5.
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M.P. de Leon, R. Nishi, F. Kumasaka, T. Takaesu, R. Kitamura, A. Otani,
2008
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Reef Rip Current Generated by Tide and Wave during Summer Season: Field Observation Conducted in Yoshiwara Coast, Ishigakijima, Okinawa, Japan
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 15)
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Ref ID
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27568
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Author
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M.P. de Leon, R. Nishi, F. Kumasaka, T. Takaesu, R. Kitamura, A. Otani
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Year
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2008
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Title
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Reef Rip Current Generated by Tide and Wave during Summer Season: Field Observation Conducted in Yoshiwara Coast, Ishigakijima, Okinawa, Japan
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008 (Session number 15)
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Keywords
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11ICRS, Reef rip current, tide and wave dominated, coral reef, safe utilization, water circulation
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Caption
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Abstract
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In 2004 and 2005, five drowning accidents in Ishigakijima, Okinawa were documented by Japan Coast Guard and were found to be caused by a strong offshore current commonly known as “reef current”. This type of current has been identified to be responsible in generating the circulation of water and transportation of sediment in coral reefs. In this paper, however, high-speed offshore current in coral reefs is specifically referred to as “reef rip current”. Considering that the generation mechanism of reef rip current is not revealed yet, the researchers conducted a hydrodynamic study in Yoshiwara Coast, Ishigakijima, Okinawa in two phases (normal and storm conditions) during summer season to determine the location and time of occurrence of the strong offshore current that will significantly address safe utilization of coral reef and carbonate beach thereby reducing drowning accidents. The nearshore hydrodynamic project that was undertaken included field measurement of wave, current and tide during normal and storm conditions with the implementation of bathymetry survey by laser method. The results revealed the maximum 20-minute average offshore velocity at 1.2m/s. In addition, it was observed during low tide condition that most of the water inside the lagoon is only discharged through the reef gap.
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Online Documents
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No online document
- Copies of papers downloaded from ReefBase may be used and reproduced for non-commercial purpose only.
- If you encounter any problem viewing the PDF files, please use the latest version of Adobe Reader.
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