Mercury, cadmium and lead biogeochemistry in the soil-plant-insect system in Huludao City.
Mercury, cadmium, and lead concentrations of ashed plants and insects samples were investigated and compared with those of soil to reveal their biogeochemical processes along food chains in Huludao City, Liaoning Province, China. Concentration factors of each fragments of the soil-plant-the herbivorous insect-the carnivorous insect food chain were 0.18, 6.57, and 7.88 for mercury; 6.82, 2.01, and 0.48 for cadmium; 1.47, 2.24, and 0.57 for lead, respectively. On the whole, mercury was the most largely biomagnified, but cadmium and lead were not greatly accumulated in the carnivorous insects as expected when the food chain extended to the secondary consumers. Results indicated that concentration factors depended on metals and insects species of food chains.
Zhang
Zhong-Sheng
ZS
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agro ecology, CAS, Changchun, China.
Lu
Xian-Guo
XG
Wang
Qi-Chao
QC
Zheng
Dong-Mei
DM
D000818:Animals; D002104:Cadmium / Q000032:analysis / Q000378:metabolism*; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D005247:Feeding Behavior; D020387:Food Chain; D007313:Insecta / Q000378:metabolism* / Q000502:physiology; D007854:Lead / Q000032:analysis / Q000378:metabolism*; D008628:Mercury / Q000032:analysis / Q000378:metabolism*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*; D013045:Species Specificity
D012989:Soil Pollutants; D002104:Cadmium; D007854:Lead; D008628:Mercury