2006 Fiscal Year Final Research Report Summary
Analysis of biomagnification profiles of environmental chemicals in the shallow water ecosystems based on the nitrogen stable isotope ratio
| Project/Area Number |
16310042
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Risk sciences of radiation/Chemicals
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| Research Institution | Ehime University |
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Principal Investigator |
TAKEUCHI Ichiro Ehime University, Faculty of Agriculture, Professor, 農学部, 教授 (30212020)
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| Co-Investigator(Kenkyū-buntansha) |
SUGIMOTO Atsuko Hokkaido University, Graduate School of Environmental Science, Professor, 大学院地球環境科学研究院, 教授 (50235892)
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| Project Period (FY) |
2004 – 2006
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| Keywords | Environmental chemicals / Biomagnification profile / Shallow water ecosystem / Organotins / Organochlorines / Alkylphenols / Polycyclic aromatic hydrocarbons |
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| Research Abstract |
The present study elucidated the biomagnification profiles of oroganotins, organochrolines, polycyclic aromatic hydrocarbons (PAHs), and alchylphenols through coastal food web based on trophic characterization using stable nitrogen ratio analysis (δ^<15>N). While tributyltin (TBT), one of the representative organotins, showed no significant biomagnification through the coastal food web (expressed by δ^<15>N), significant biomagnification of triphenyltin (TPT) was found. Most of organochlorines, i.e., dichlorodiphenyltrichloroethane and its metabolites (DDTs), polychlorinated biphenyls (PCBs), chlordane compounds (CHLs) and tris-4-chlorophenyl methane (TCPMe) showed the significant positive increases with increases of δ^<15>N. However, unlike these organochlorines, most of isomers of PAHs and nonylphenols and octylphenol, both which are alkylphenols, showed the significant decrease with increases of δ^<15>N. The present study shows that, unlike organochlorines, organotins except for TPT, PAHs and alkylphenols showed no significant biomagnification through the coastal food web. A comparison of our results with previous data on the log transformed octanol-water partition coefficient (log Kow) indicates that a value of 5.5 (log Kow) represents a threshhold coefficient for biomagnification or not through the coastal food web. This means that organisms situated at lower trophic levels of the food web accumulate more of these anthropogenic chemicals than organisms situated at the higher trophic level.
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Research Products
(6 results)
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[Journal Article] Heavy metal and selenium concentrations in hepatopancreas of Penaeus monodon (Decapoda : Penaeidae) from South Vietnam.2006
Author(s)
Tu, N.P.C.(First Author), Ha, N.N., Ikemoto, T., Tuyen, B.C., Tanabe, S., Takeuchi, I.
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Journal Title
Proceeding, 3rd International Symposium on the Development of Water Resource Management System in Mekong Watershed
Pages: 121-124
Description
「研究成果報告書概要(和文)」より
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