| Geochemistry of Slow-Growing Corals: Reconstructing Sea Surface Temperature, Salinity and the North Atlantic Oscillation |
JUN 2007 |
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| Authors:
Nathalie F. Goodkin; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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 | A 225-year old coral from the south-shore of Bermuda (64CW, 32CN) provides a record of decadal-to-centennial scale climate variability. The high accretion rates, longevity, and skeletal growth bands found in coral skeletons make them an ideal resource for well-dated, seasonal climate reconstructions. Coral skeletons incorporate strontium (Sr) and calcium (Ca) in relative proportions inversely to the sea surface temperature (SST) in which the skeleton is secreted. Delta(exp 18)O of the ... |
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| Changes in Trace and Minor Constituents and Associated Micro-architecture of Montastrea faveolata during Time of Stress |
Sep-2003 |
5 pages |
| Authors:
Charles W Holmes; Noreen A Buster; James E Sorauf; J H Hudson; Cynthia Kester; GEOLOGICAL SURVEY SAINT PETERSBURG FL
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 | As corals grow, they secrete a calcareous skeleton with the aid of photosynthetic activity of endosymbiotic dinoflagellates. The rate of this secretion varies annually which produces annual bands. Entrapped with the carbonate are trace substances that record the chemistry of the surrounding ocean. Detailing these changes in chemistry requires careful high-resolution sampling. New procedures involving laser ablation inductive couple plasma mass spectroscopy (LA-ICP/MS) provides a unique method that does not ... |
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| Genetic Diversity and Stability of Coral - Algal Symbiosis |
05 MAR 1999 |
9 pages |
| Authors:
Nancy Knowlton; SMITHSONIAN TROPICAL RESEARCH INST APO AA 34002-0948
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| To characterize ecological differences between different genotypes of symbiotic algae in the corals Montastraea annularis and M. faveolata, and to assess their stability in the face of environmental change. Pieces of the coral were collected from reefs in the San Blas archipelago, Panama. Our work involved sampling of Montastraea annularis and M. faveoiata across a variety of depths For each colony, two pairs of microhabitats were compared: top vs. side ... |
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| Deep-Sea Corals: A New Oceanic Archive |
FEB 1998 |
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| Authors:
Jess F. Adkins; MASSACHUSETTS INST OF TECH CAMBRIDGE
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| Deep-sea corals are an extraordinary new archive of deep ocean behavior. The species Desmophyllum cristagalli is a solitary coral composed of uranium rich, density banded aragonite that I have calibrated for several paleoclimate tracers. Using a newly developed ICP-MS age screening method, large numbers of samples can be processed relatively quickly and inexpensively to uncover interesting fossil corals for further analysis. |
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| Dispersal Between Isolated Seamount Populations - A Molecular Approach |
14 SEP 96 |
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| Authors:
Lauren Mullineaux; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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| This AASERT has supported a graduate student, Ewann Agenbroad, in her studies of population genetics, gene flow and phylogeny of seamount corals. The project was initially organized around three Pisces IV submersible cruises (operated through NOAA's Hawaiian Underwater Research Laboratory), scheduled for summers of 1993, 1994 and 1995. The 1993 cruise was completed, allowing us to collect multiple individuals of more than 20 coral species from three seamounts in the ... |
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| Species Profiles: Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (South Florida). Reef-Building Corals |
AUG 87 |
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| Authors:
James W. Porter; GEORGIA UNIV ATHENS DEPT OF ZOOLOGY
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| Species profiles are literature summaries of the taxonomy, morphology, range, life history, and environmental requirements of coastal aquatic species. They are designed to assist in environmental impact assessment. Four species of reef-building corals are considered: elkhorn coral, staghorn coral, common star coral, and large star coral. All four species spawn annually in the fall during hurricane season. Juvenile recruitment is low in all four species. Rapid growth rates of species ... |
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| Propellant-Embedded Anchors: Prediction of Holding Capacity in Coral and Rock Seafloors |
NOV 1980 |
70 pages |
| Authors:
J. F. Wadsworth III; R. M. Beard; CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CA
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| Propellant-embedded anchors have become an important asset in the Navy's mooring equipment inventory. They offer potential for anchoring in coral and rock seafloors where conventional anchors will not work or present logistic problems. Most operational installations of propellant-embedded anchors have been in coral seafloors and these anchors have usually been proof-loaded to their design capacity. The ultimate capacities of these installations have not been determined, hence the full potential of ... |
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| Coral Cratering Phenomenology |
31 OCT 1980 |
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| Authors:
Robert l. LaFrenz; SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
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| This report utilizes the results of Project Tugboat, a high- explosive, optimum depth-of-burial project done in coral overlaid with water to help explain the formation process of the Pacific Proving Grounds (PPG) nuclear surface burst craters. The craters produced during Project Tugboat were wide, flat, and saucer-shaped. The volume was approximately four times larger than contemplated in the design based upon continental experience, and apparently came entirely from crushing, compaction, ... |
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| Hurricane-Generated Waves and Coastal Boulder Rampart Formation. |
DEC 1977 |
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| Authors:
M. L. Hernandez-Avila; Harry H. Roberts; Lawrence J. Rouse; LOUISIANA STATE UNIV BATON ROUGE COASTAL STUDIES INST
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| Coral boulder ramparts along the south coast of Grand Cayman Island have no source area near the shoreline. Coral communities acting as a source of rampart rubble are found 0.3 km from shore and at a depth of 10-12 m. Theoretical calculations of wave-induced forces from wave refraction analyses of hurricane-generated waves indicate that the probable hurricane dynamic force spectrum is sufficient to break and transport coral rubble from depths ... |
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| The Use of Coral as an Aggregate for Portland Cement Concrete Structures. |
JUN 1974 |
43 pages |
| Authors:
P. A. Howdyshell; ARMY CONSTRUCTION ENGINEERING RESEARCH LAB CHAMPAIGN ILL
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| The investigation documents the experience gained by the Corps of Engineers and the Navy since World War II in the use of coral as an aggregate for portland cement concrete. The approach was to evaluate relevant literature and construction and inspection records, visit construction and material preparation sites, evaluate existing coral concrete structures, and analyze coral aggregate and coral concrete samples in the laboratory. The results of the investigation indicate ... |
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Reports by Keyword(s)
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