Research on tree trunk bark pocket as pollution time capsules

树干树皮口袋作为污染时间胶囊的研究

• 批准号: 07808058
• 负责人: SATAKE Kenichi
• 金额: $ 1.34万
• 依托单位: Nationla Institte for Environmental Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07808058/
• 关键词: bark pocket; lead; heavy metal; monitoring; year ring; モニタリング

The concentration of lead in bark pockets of tree trunks was investigated for its potential use as an archival indicator of pollution. The bark pocket investigated were those of a conifer, Cryptomeria japonica, formed around 1760-1780 (235-255 years ago) at Nikko about 100 km north of Tokyo, and around 1786-1809 (186-209 years ago) on Yakushima Island, located in a remote southern region of Japan. The lead concentrations in these C.japonica bark prockets, repesenting the total lead accumulation during a period of about 20 years at each site, were 0.1 mug Pb g^<-1> at Nikko and 0.22 mug Pb g^<-1> at Yakushima. In contrast, the lead concentration in the outer bark of C.japonica at the present time is about 150 mug Pb g^<-1> at Nikko (1990) and 1.4mug Pb g^<-1> at Yakushima (1992). The use of leaded gosoline, the main source of lead in atmosphere, was initiated in Jaan in 1949 and reached a maximum during 1960-1965. As the production of leaded gosoline was stopped in 1987, the lead concentration in the outer bark represents the total for a period of about 40 years. Therefore, these results suggest an increase in lead pollution of about three orders of magnitde at Nikko, which is relatively close to Tokyo, and one order of magnitde at Yakshima, which is relatively remote.

研究了树干树皮袋中铅的浓度，以探讨其作为污染档案指标的可能性。调查的树皮袋是一种针叶树，日本柳杉，形成于1760-1780年（235-255年前），在尼科约100公里以北，约1786-1809年（186-209年前）在屋久岛，位于日本南部偏远地区。代表每个地点约20年期间铅累积总量的这些日本杉树皮中的铅浓度在尼科为0.1 μ g/<-1>g，屋久岛为0.22 μ g/<-1>g。相比之下，尼科（1990年）和屋久岛（1992年）的研究结果表明，目前日本柑橘外皮中的铅浓度约为150 mug Pb g^<-1>-1和1.4 mug Pb g^-1<-1>。含铅戈索林是大气中铅的主要来源，1949年在Jaan开始使用，1960-1965年达到最高峰。1987年停止生产含铅的戈索林后，树皮外层的铅含量相当于40年的总量。因此，这些结果表明，在相对靠近东京的尼科，铅污染增加了约三个数量级，而在相对偏远的屋岛，铅污染增加了一个数量级。

项目成果

Kenichi Satake, Atsushi Tanaka, Katsuhiko Kimura: "Accumulation of lead in tree trunk bark pockets as pollution time capsules." the Science of Total Environment. 181. 25-30 (1996)

Kenichi Satake、Atsushi Tanaka、Katsuhiko Kimura：“铅在树干树皮口袋中积累，作为污染时间胶囊。”

Kenichi Satake,Katsuhiko Kimura,Atsushi Tanaka: "Two-hundred-years of shoots of epiphytic moss Brothorella henonii proserved in a bark pocket of Crytomeria japonica" Journal of Bryology. 18. 815-832 (1995)

Kenichi Satake、Katsuhiko Kimura、Atsushi Tanaka：“在 Crytomeria japonica 的树皮口袋中保存了两百年的附生苔藓 Brothorella henonii 芽”《苔藓学杂志》。

Kenichi Satake, Katsuhiko Kimura, Atsushi Tanaka: "Two-hundred-years old shoots of the epiphytic moss Brotherlla henonii preserved in a bark pocket of the conifer Cryptomeria japonical" Journal of Bryology. 18. 815-832 (1995)

Kenichi Satake、Katsuhiko Kimura、Atsushi Tanaka：“保存在针叶树柳杉树皮口袋中的附生苔藓 Brotherlla henonii 的 200 年前芽”《苔藓学杂志》。

Kenichi Satake,Atsushi Tanaka,Katsuhiko Kimura: "Accumulation of lead in tree trunk bark pocket as pollution time capsules" the Science of Total Environment. 181. 25-30 (1996)

Kenichi Satake、Atsushi Tanaka、Katsuhiko Kimura：“树干树皮口袋中铅的积累作为污染时间胶囊”《总体环境科学》。