|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >
Lead concentration and isotopic composition in the Pacific sclerosponge (Acanthochaetetes wellsi) reflects environmental lead pollution
| Title: | Lead concentration and isotopic composition in the Pacific sclerosponge (Acanthochaetetes wellsi) reflects environmental lead pollution |
| Authors: | Ohmori, Kazuto Browse this author | | Watanabe, Tsuyoshi Browse this author →KAKEN DB | | Tanimizu, Masaharu Browse this author →KAKEN DB | | Shirai, Kotaro Browse this author →KAKEN DB |
| Issue Date: | Apr-2014 |
| Publisher: | Geological Society of America |
| Journal Title: | Geology |
| Volume: | 42 |
| Issue: | 4 |
| Start Page: | 287 |
| End Page: | 290 |
| Publisher DOI: | 10.1130/G34316.1 |
| Abstract: | We measured Pb/Ca and Pb isotopes with high resolution in the high-Mg calcite skeleton of a Pacific sclerosponge (Acanthochaetetes wellsi) collected from the reef edge off the western coast of Kume Island (East China Sea), to investigate its potential to he used as a proxy for lead contamination in the environment, and atmospheric transportation and fallout over the last few decades. Skeletal Pb/Ca ranged from 58 to 1642 nmol/mol, 10x higher than that of the aragonite skeleton of Pacific corals, and 2.5x higher than that of the aragonite skeletons of Caribbean sclerosponges. The Pb/Ca timeseries recorded from 1967 through 2007 CE correspond to historical changes in atmospheric lead flux in anthropogenic aerosols. Pb isotopes (Pb-206/Pb-207 and Pb-208/Pb-207) in the sclerosponge skeleton document that the main source of lead emissions shifted from Japan (1970-1980 CE) to China (1995-2005 CE), as expected from the timing of legislation against the use of leaded gasoline in Japan and China. Our results indicate that the skeleton of the Pacific sclerosponge is a powerful proxy to monitor environmental lead pollution. Applying this methodology to long-living and/or fossil specimens could be useful in determining the interannual variability of atmospheric transport and dynamics over geologic time scales. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/58018 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 渡邊 剛
|
