Major Descriptors: *CRATERS -- GROUND SUBSIDENCE; *CRATERS ~~ SHAPE; *CRATERS -- SIZE; “NUCLEAR WEAPONS -- BLAST EFFECTS Descriptors: BIKINI; CORALS; CRATERING EXPLOSIONS; ENIWETOK; LIQUEFACTION; PACIFIC OCEAN Broader Terms: CAVITIES; CNIDARIA; EXPLOSIONS; ISLANDS; MARSHALL ISLANDS; MICRONESIA; OCEANIA; SEAS; SURFACE WATERS; THERMOCHEMICAL PROCESSES; WEAPONS : Subject Categories: 450201* <-- Military Technology, Weaponry, Defense -- Nuclear Explosions & Explosives -- Containment INIS Subject Categories: E1400* -- Nuclear Explosions & National _ ‘ 10/5/6399, (Item 339 from file: 103) 01567253 ERA-10-024317; EDB-85-074028 Title: Effect of shading by the table coral Acropora Hyacinthus on understory corals Author(s): Stimson, J. Affiliation: Univ. of Hawaii, Honolulu (Acropora* Pocillopora) Source: Ecology (United States) v 66:1. Coden: ECOLA Publication Date: Feb 1985 p 40-53 Contract Number (DOE): AC08-76EV00703 Document Type: Journal Article; Numerical data Language: English Journal Announcement: EDB&504 Subfile: ERA (Energy Research Abstracts). Country of Origin: Abstract: United States Field surveys at Enewetak Atoll, Marshall Islands, show that coral density and diversity is much lower beneath Acropora table corals than in adjacent unshaded areas. Additionally, the understory community is predominantly composed of massive and encrusting species, while branching Acropora and Pocillopora predominate in unshaded areas. Results of experiments in which coral fragments were transferred to the shade of table Acropora and to adjacent unshaded areas show that shading slows the growth and leads to higher mortality of branching species, while massive and encrusting species are unaffected. Light measurements made beneath table Acropora show that illumination and irradiance values fall to levels at which most hermatypic corals do not occur. The fast-growing but fragile table Acropora are abundant in a wide variety of atoll habitats and grow rapidly to form a canopy approx. = 50 cm above the substrate. However, table Acropora also have high mortality rates, so that there is continuous production of unshaded areas. The growth and death of tables thus create local disturbances, and the resulting patchwork of recently shaded and unshaded areas may enhance coral diversity in areas of high coral cover. Major Descriptors: *CORALS -- COMPETITION; *VISIBLE RADIATION -- BIOLOGICAL EFFECTS Descriptors: ABUNDANCE; ECOLOGY; ENIWETOK; EXPERIMENTAL DATA; GROWTH; HABITAT; MORTALITY; POPULATION DENSITY; SPECIES DIVERSITY; VARIATIONS Broader Terms: CNIDARIA; DATA; ELECTROMAGNETIC RADIATION; INFORMATION; ISLANDS; MARSHALL ISLANDS; MICRONESIA; NUMERICAL DATA; OCEANIA; RADIATIONS Subject Categories: 520100* (-1989) -- Environment, Aquatic -- Basic Studies -- 10/5/640 (Item 340 from file: 103) 01567249 ERA~-10-024316; EDB-85-074024 Title: Radiological dose assessments of atolls in the Northern Marshall Islands Author(s): Robison, W.L. Affiliation: Lawrence Livermore National Lab., CA Conference Title: 19. annual meeting of the National Council of Radiation Protection and Measurements Conference Location: Washington, DC, USA Conference Date: 6 Apr 1963 Source: Proceedings of the National Council on Radiation Protection and Measurements (United States) wv 5. 3 cy oy en cs