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Cadmium regulation by Lasius niger A contribution to understanding high metal levels in ants

Insect Science 2009年第1期16卷 89-92页

作者： Irena M. Grzes Institute of Environmental Sciences Jagiellonian University Gronostajowa 7 30-387 Krakow Poland

Ants （Formicinae, Hymenoptera） are considered efficient accumulators of Zn and Cd. In this study the relationship between Cd concentrations in soil and in Lasius niger workers was assessed for 20 colonies located along a gradient of Cd pollution. As soil Cd concentration increased from 1 to 8 mg/kg, ant body Cd concentration increased rapidly to about 40 mg/kg, and remained stable at this level, through a progressive increase of soil Cd concentration from 8 to 21 mg/kg. The phase of rapid increase confirms the high ability of L. niger for Cd accumulation, while the stabilization of Cd body concentration indicates either increasing elimination rate or decreasing rate of uptake. Therefore it can be concluded that Lasius niger has a high ability to accumulate Cd, but simultaneously an ability for Cd regulation was detected.

关键词： accumulation ants elimination heavy metals pollution gradient regulation

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Source of and potential bio-indicator for the heavy metal pollution in Ny-lesund,Arctic

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Chinese Journal of Polar Science 2007年第2期18卷 110-121页

作者：王小飞袁林喜罗泓灏龙楠烨王玉宏孙立广 Institute of Polar Environment University of Science and Technology of China

Three kinds of tundra plant samples including Dicranum angustum（ a type of boreal bryophyte ） , Puceinellia phryganodes （a type of fringy plant） , Salix polaris （ a type of vascular plant） and surface soil were samples in 200 at Ny-Alesund of the Arctic. The levels of eight heavy metal elements （ Hg, Pb, Cd, Cu, Zn, Ni, Fe and Mn） and three metal-like elements （As, Se, Sr） in the plant and soil samples of the areas within previous coal mining activities are significantly higher than those of other areas. The relative accumulation of these elements in these tundra plant samples is consistent with the one in the soil samples, especially in the areas affected by previous coal-mining activities. Thus, the pollution is apparently from local coal mining activity. Dicranum angustum has the highest concentrations among those elements, and it can be a good bio-indicator for heavy metal pollution in Ny-Alesund. Though Ny- Alesund is less polluted by heavy metal than nearby Northern European human living areas, but much more than the tundras of the Alaska, Greenland and the Antarctic.

关键词： Arctic Ny-Aesund tundra plants heavy metals pollution gradient

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