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Artificial radionuclides in marine organisms in the northeast Pacific Ocean off Oregon, USA

Conference ·
OSTI ID:6098688
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Although /sup 65/Zn is found in all groups of animals in the pelagic and benthic environments, in higher concentrations in some animal groups than others, the highest levels measured are still very much below hazard levels. Highest concentrations of /sup 65/Zn in the fauna usually were found near the Columbia River, a point source. However, pelagic organisms further to the south showed high concentrations during the summer. Bathymetric, seasonal and diurnal effects on the distributions of radionuclides in the biota are interconnected, particularly in the macroplankton and nekton. Zinc-65 stratified in the pelagic organisms in the summer, was uniformily distributed with depth in the winter. Concentrations were higher in the macroplankton and nekton in surface waters at night, and decreased with depth in the benthos. Zirconium-95-Niobium-95 were found at all depths, though in the pelagic fauna they were in higher concentration in surface waters. Zinc-65 was found throughout the food chain, while /sup 95/Zr-/sup 95/Nb decreased rapidly after the first two trophic levels.
Research Organization:
Oregon State Univ., Corvallis (USA). Dept. of Oceanography
OSTI ID:
6098688
Report Number(s):
RLO-1750-3; CONF-660507-2
Country of Publication:
United States
Language:
English

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Related Subjects

520302* -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- Aquatic Ecosystems & Food Chains-- (-1987)
54 ENVIRONMENTAL SCIENCES
560174 -- Radiation Effects-- Nuclide Kinetics & Toxicology-- Microorganisms-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUATIC ORGANISMS
BENTHOS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COLUMBIA RIVER
DAILY VARIATIONS
DAYS LIVING RADIOISOTOPES
DEPTH
DIMENSIONS
ECOLOGICAL CONCENTRATION
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
NIOBIUM 95
NIOBIUM ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
PACIFIC OCEAN
PLANKTON
RADIOECOLOGICAL CONCENTRATION
RADIOISOTOPES
RIVERS
SEAS
SEASONAL VARIATIONS
STREAMS
SURFACE WATERS
VARIATIONS
ZINC 65
ZINC ISOTOPES
ZIRCONIUM 95
ZIRCONIUM ISOTOPES