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Latest 5 Additions
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1.
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Craft, J. A.,
2008
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Using nearshore macrobenthos as environmental indicators adjacent to a major navigational inlet: Port Everglades inlet, Florida
Proceedings of the 11th Annual International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 100-104
(Session number 4)
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Ref ID
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72380
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Author
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Craft, J. A.
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Year
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2008
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Title
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Using nearshore macrobenthos as environmental indicators adjacent to a major navigational inlet: Port Everglades inlet, Florida
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Source
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Proceedings of the 11th Annual International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 100-104
(Session number 4)
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Keywords
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ICRS11, Coral Reef Organisms as Recorders of Local and Global Environment Changes, land-based pollution, effluent, indicators, coral reefs
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Caption
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Abstract
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The reefs off Broward County, Florida, USA, lie near the northernmost limits of tropical coral reefs, are non-accreting, and have long been affected by human influences including land-based sources of pollution. Port Everglades, a major industrial shipping port, is a likely source of many anthropogenic contaminants, which are discharged in an effluent plume that sweeps over the coastal reef. The results of two nearshore reef studies were examined here to determine if the inlet effluent plume produces a water quality gradient and associated biological gradient, and if any biological indicators of water quality can be determined. Macrobenthos cover at 33 sites was assessed from Port Everglades inlet south to the Broward County line. Results showed macroalgae abundance significantly increases with proximity to Port Everglades inlet. In addition, water quality data clearly illustrate a low-salinity wedge being discharged from the inlet at low tide, as well as increased levels of nutrients around the mouth of the inlet. These results suggest that Port Everglades is a probable source of coastal pollution that may be causing localized increases in algal abundance that can be detrimental to the benthic ecology of the surrounding nearshore reef.
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Online Documents
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- 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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Armid, A., Y. Takaesu, T. Fahmiati, S. Yoshida, R. Hanashiro, H. Fujimura, T. Higuchi, E. Taira and T. Oomori,
2008
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U/Ca as a possible proxy of carbonate system in coral reef
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008
Session Number 4
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Ref ID
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72379
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Author
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Armid, A., Y. Takaesu, T. Fahmiati, S. Yoshida, R. Hanashiro, H. Fujimura, T. Higuchi, E. Taira and T. Oomori
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Year
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2008
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Title
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U/Ca as a possible proxy of carbonate system in coral reef
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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 4
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Keywords
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ICRS11, Uranium, distribution coefficient, proxy, carbonate system
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Caption
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Abstract
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Uranium incorporation into coral skeleton of Goniastrea aspera was investigated in the laboratory incubation for 8 hours under controlled pCO2 and temperature. Seawater parameters such as pH and alkalinity as well as calcium and uranium concentrations were measured every 2 hours. pH increased progressively from 8.17 at initial to 8.54 at the end. In contrast, alkalinity significantly decreased from 2292 to 1467 mmol/kg. The apparent distribution coefficients of uranium, λUO2 , between Goniastrea aspera skeleton and seawater were obtained to be 2.7 to 0.7. The data were compiled with those of other studies and the overall data illustrate a negative correlation between λUO2 and aCO3 2− with the slope of −0.75. It is suggested that variation of carbonate ion activity (i.e. carbonate system) controls the distribution coefficient of uranium and hence coral U/Ca. The effect of uranyl carbonate complexes formation on uranium incorporation is discussed.
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Online Documents
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- 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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Shimamura,M., K. Hyeong, T. Watanabe, T. Irino, C. M. Yoo and W. S. Kim,
2008
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Opposed trend of skeletal carbon isotopic ratios found in two different coral species collected from the same site: Genus-dependent responses
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 90-94
(Session number 4)
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Ref ID
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72378
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Author
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Shimamura,M., K. Hyeong, T. Watanabe, T. Irino, C. M. Yoo and W. S. Kim
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Year
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2008
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Title
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Opposed trend of skeletal carbon isotopic ratios found in two different coral species collected from the same site: Genus-dependent responses
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 90-94
(Session number 4)
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Keywords
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ICRS11, Coral Reef Organisms as Recorders of Local and Global Environmental Change, coral skeleton, carbon isotope compositions, species dependency, Porites, Favia.
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Caption
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Abstract
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For better understanding of carbon isotope systematic of coral skeleton, two different coral species growing next to each other, Porites sp. and Platygyra ryukyuensis, were collected at a site from Ishigaki Island, Japan, and analyzed for oxygen and carbon isotope ratios. Oxygen isotope ratios of both corals show seasonal variations well matching each other and that of observed sea surface temperatures. However, carbon isotope ratios were opposed in trends between two coral species. Carbon isotope ratios of Porites show a seasonal fluctuation matching that of solar radiation, while those of Platygyra are opposite in trend to that of solar radiation with weaker amplitude. Given that both coral colonies had been exposed to same environmental conditions during the growth period, these opposite trends should be attributed to different species-dependent vital response to the same environmental condition. A vector analysis indicates that seasonal variation of carbon isotope ratios are dominantly controlled by metabolic isotopic effect in both corals and also that the opposite trends in seasonal fluctuations of two coral species result from the opposite direction of metabolic isotope effect acting on two coral species. Porites shows a negative slope in a δ18O-δ13C plot, in which seasonal shifts of δ18O and δ13C from colder to warmer season are explained with increased temperature and increased photosynthesis/respiration (P/R) ratios, indicating increased food-dependency on symbiotic algae (autotrophy) during warmer season. In contrast, Platygyra shows a positive slope in a δ18O-δ13C plot, in which seasonal shift of δ13C to summer is caused by decreased P/R ratios, indicative of reduced dependency on autotrophy during warmer season. This physiological characteristic of Platygyra might provide a tolerance to colder and weaker solar radiation environmental condition, which allows its wide distribution in middle latitude region.
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Online Documents
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- 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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Ourbak, T., K. DeLong, T. Corrège,B. Malaizé, H. Kilbourne, S. Caquineau, D. Hollander,
2008
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The significance of geochemical proxies in corals, does size (age) matter?
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 85-89
(Session number 4)
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Ref ID
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72377
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Author
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Ourbak, T., K. DeLong, T. Corrège,B. Malaizé, H. Kilbourne, S. Caquineau, D. Hollander
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Year
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2008
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Title
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The significance of geochemical proxies in corals, does size (age) matter?
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 85-89
(Session number 4)
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Keywords
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ICRS11, Coral Reef Organisms as Recorders of Local and Global Environmental Change, coral, geochemical proxies, paleoclimate reconstruction
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Caption
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Abstract
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The main goal of this paper is to determine how size (small vs. large coral heads) and age (juvenile vs. adult) potentially affect geochemical proxies in coral skeleton, widely used in paleoclimate studies. After ensuring that corals are not diagenetically altered, we analyse Sr/Ca, Mg/Ca, δ18O and δ13C on 3 cores from two study areas. We compare two different size corals from similar environmental setting in Vanuatu. The smaller coral head, despite presenting a similar seasonal shape pattern that its larger counterpart, presents higher Sr/Ca, potentially interpreted as cooler temperatures. We also study the top and the basement of a ~7m-high massive Porites sp. core from New Caledonia that reveal both modern and post-settlement periods. A sharp evolution of the geochemical proxies is seen during the post-settlement period. The differences in between the cores seem unlikely to be caused by environmental factors alone and we argue for biological differences. The implications are important for fossil studies where coral cores are often recovered in small pieces with no age indices (adult or young). Geochemical reconstructions should then be carefully interpreted as ontogenic effects could easily bias the results.
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Online Documents
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- 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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Ramirez, A., C. Daniels and P. Hallock,
2008
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Applications of the SEDCON and FORAM Indices on patch reefs in Biscayne National Park, FL, USA
Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 80-85
(Session number 4)
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Ref ID
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72376
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Author
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Ramirez, A., C. Daniels and P. Hallock
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Year
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2008
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Title
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Applications of the SEDCON and FORAM Indices on patch reefs in Biscayne National Park, FL, USA
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Source
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Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida, 7-11 July 2008. Vol. 1: 80-85
(Session number 4)
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Keywords
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ICRS11, Coral Reef Organisms as Recorders of Local and Global Environment Change, Foraminifera, SEDCON, FORAM, reefs, sediments.
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Caption
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Abstract
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Coral cover remains highest on patch reefs at the northern end of the Florida reef tract. Two indices, the FORAM Index and the SEDCON Index, were developed to indicate the suitability of a reef environment for continued reef accretion. Patch reefs were sampled in Biscayne National Park, FL, to assess sediment characteristics and foraminiferal assemblages, as well as to examine trends between the two indices. Sediments associated with a majority (59%) of reefs were coarse sands; muddy sediments were restricted to a few inner patch reefs that were isolated from the flow of Caesar’s Creek. Unidentifiable grains dominated the sediment constituents, along with calcareous algae and molluscan debris. Shells from 82 genera of Foraminifera were identified in the sediments. Quinqueloculina was the most consistently common genus. Percent mud was the most influential measured variable on the distribution of both sediment constituents and foraminiferal assemblages. Patterns of FORAM and SEDCON Index values and their similarity to temperature, salinity, and percent mud distributions show that Caesar’s Creek is affecting the benthic community by providing flow that limits the accumulation of mud and potentially other anthropogenic stressors. Overall this study suggests that the reefs in this area are marginal for continued reef growth.
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Online Documents
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- 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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