Distribution and elevated soil pools of mercury in an acidic subtropical forest of southwestern China
Distribution and elevated soil pools of mercury in an acidic subtropical forest of southwestern China
复制标题
中国西南亚热带酸性森林汞分布及土壤升高库
DOI：
10.1016/j.envpol.2015.03.021
复制
发表时间：
2015
影响因子：
8.9
通讯作者：
Chen Jian
中科院分区：
文献类型：
--
作者：
Zhou Jun;Wang Zhangwei;Zhang Xiaoshan;Chen Jian
Tieshanping catchment in southwest China was supposed to a large pool of atmospheric mercury. This work was aimed to examine THg (total mercury) concentrations, pools and influence factors in the acidic forest. THg concentrations were highly elevated in the study area, which was significantly depended on TOM (total organic matter) concentrations and altitudinal elevation, whereas negatively correlated with soil pH. The pools of mercury accumulated in soils were correlated strongly with the stocks of TOM and altitude, ranged from 5.9 to 32 mg m−2and averaged 14.5 mg m−2, indicating that the acidic forest was a great sink of atmospheric mercury in southwest China. THg concentrations in stream waters decreased with altitude increasing and regression analyses showed that soil/air exchange flux would be increased with the decrease of altitude. Present results suggest that elevation increasing decreases THg losses as low THg concentrations in runoffs and volatilization from soils.
