Changes in lacustrine environment due to anthropogenic activities over 240 years in Jiuzhaigou National Nature Reserve, southwest China

2014 ◽  
Vol 349 ◽  
pp. 367-375 ◽  
Author(s):  
Shiguang Li ◽  
Xinxin Hu ◽  
Ya Tang ◽  
Chengmin Huang ◽  
Weiyang Xiao
2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Jun Wang ◽  
Huihong Du ◽  
Ye Xu ◽  
Kai Chen ◽  
Junhua Liang ◽  
...  

Zhangjiangkou Mangrove National Nature Reserve is a subtropical wetland ecosystem in southeast coast of China, which is of dense population and rapid development. The concentrations, sources, and pollution assessment of trace metals (Cu, Cd, Pb, Cr, Zn, As, and Hg) in surface sediment from 29 sites and the biota specimen were investigated for better ecological risk assessment and environmental management. The ranges of trace metals in mg/kg sediment were as follows: Cu (10.79–26.66), Cd (0.03–0.19), Pb (36.71–59.86), Cr (9.67–134.51), Zn (119.69–157.84), As (15.65–31.60), and Hg (0.00–0.08). The sequences of the bioaccumulation of studied metals are Zn > Cu > As > Cr > Pb > Cd > Hg with few exceptions. Cluster analysis and principal component analysis revealed that the trace metals in the studied area mainly derived from anthropogenic activities, such as industrial effluents, agricultural waste, and domestic sewage. Pollution load index and geoaccumulation index were calculated for trace metals in surface sediments, which indicated unpolluted status in general except Pb, Cr, and As.


2020 ◽  
Vol 19 (1) ◽  
pp. 93
Author(s):  
Peng Xu ◽  
Hao Chen ◽  
Duoying Cui ◽  
Chunrong Li ◽  
Guoyuan Chen ◽  
...  

2014 ◽  
Vol 22 (6) ◽  
pp. 785 ◽  
Author(s):  
Wang Guohai ◽  
Shi Zepan ◽  
Liu Xiuju ◽  
Zhou Qihai ◽  
Xiao Zhishu

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