| 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)
高木 基裕 愛媛大学, 農学部, 助教授 (70335892)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥12,100,000 (Direct Cost: ¥12,100,000)
Fiscal Year 2006: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2005: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2004: ¥5,600,000 (Direct Cost: ¥5,600,000)
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| Keywords | Environmental chemicals / Biomagnification profile / Shallow water ecosystem / Organotins / Organochlorines / Alkylphenols / Polycyclic aromatic hydrocarbons / 窒素安定同位体 / 炭素安定同位体 / 沿岸域生態系 / PCB / DDT / トリブチルスズ / トリフェニルスズ |
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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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