Temporal variations of natural and anthropogenic radionuclides in sea otter skull tissue in the North Pacific Ocean SCIE SCOPUS

Cited 9 time in WEB OF SCIENCE Cited 10 time in Scopus
Title
Temporal variations of natural and anthropogenic radionuclides in sea otter skull tissue in the North Pacific Ocean
Author(s)
Baskaran, M; Hong, GH; Dayton, S; Bodkin, JL; Kelley, JJ
Publication Year
2003
Abstract
Marine mammals being among the top predators in the food web tend to accumulate organic and inorganic contaminants from the environment. The body burden of contaminants in these species could reflect their foods and thus contaminant levels could serve as proxies on the changes of ecosystem. A pilot study was carried out to investigate the possibility of radio-nuclide leakage at Amchitka using a suite of sea otter (Enhydra lutris) skulls collected near Amchitka nuclear test-sites before (1950s) and after the testing (1990s), and at Adak, another Aleutian Island, about 300 km from Amchitka, where, the potential impact of radionuclide leakage from, Amchitka is expected to be negligible. In addition, the naturally occurring and anthropogenic radionuclide content on the sea otter skull was also utilized to investigate if there was any significant ecosystem changes in the environment. Concentration of Pb-210 in sea otter bones collected during the 1950s was significantly higher than those collected in the 1990s. We propose that among the various factors that could cause this higher enrichment in Pb-210, changes in the sea otter prey is the most likely one. Comparison of the Cs-137, Sr-90, Pu-239,Pu-240 concentrations appear not to be significantly higher in sea otter skulls collected in 1990s from Amchitka where the underground tests in 1965-71 than those from Adak, although significant differences were detected among different groups collected at various times. (C) 2002 Elsevier Science Ltd. All rights reserved.
ISSN
0265-931X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5598
Bibliographic Citation
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, v.64, no.1, pp.1 - 18, 2003
Publisher
ELSEVIER SCI LTD
Subject
ENHYDRA-LUTRIS; FOOD-CHAIN; SEDIMENTS; PB-210; CALIFORNIA; PLUTONIUM; ISOTOPES; PATTERNS; ALASKA; CS-137
Keywords
Amchitka; radionuclide leakage; Pu-239,Pu-240; Pb-210 in bone; sea otters
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCI LTD
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