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- Title
Tree-ring recorded variations of 10 heavy metal elements over the past 168 years in southeastern China.
- Authors
Shiyin Chen; Qichao Yao; Xiuling Chen; Juan Liu; Deliang Chen; Tinghai Ou; Jane Liu; Zhipeng Dong; Zhuangpeng Zheng; Keyan Fang
- Abstract
Heavy metal pollution is a serious concern in the urban area of China. Understanding metal pollution history is crucial for setting up appropriate measures for pollution control. Herein, we report a record of concentrations of 10 heavymetals (Fe, Mn, Cu, Zn, Ni, Cr, Cd, Pb, Co, and Sr) inPinus massoniana tree rings fromFuzhou City over the past 168 years, which represents the longest tree-ring chronology of heavy metals in China. The studied metals displayed contrasting distribution patterns. Among them, Mn and Sr showed the strongest migration trend with peak concentrations at the pith. Co, Cd, and Pb also showed distinctively high concentrations near the boundary between heartwood and sapwood. Ni, Cu, Cr, and Fe showed an increasing trend possibly due to migration toward bark caused by physiological activities and increasing tourism activities and traffic pollution. The other elements (Cr, Fe, and Zn) with low migration revealed the historical pollution possibly discharged by the Fuzhou Shipping Bureau and other anthropogenic activities. Strong correlations between Cu content and temperature were found, which provides an alternative tree-ring proxy for climate reconstruction. This study provides a long-term perspective of the joint impacts of physiological, environmental, and climatological factors on the concentrations of heavy metals in southeastern China.
- Subjects
CHINA; HEAVY metal toxicology; AIR pollution control; TREE-rings; CLIMATOLOGY; SAPWOOD
- Publication
Elementa: Science of the Anthropocene, 2021, Vol 9, p1
- ISSN
2325-1026
- Publication type
Article
- DOI
10.1525/elementa.2020.20.00075