[Distribution and stock of mercury in typical wetland plant in the Sanjiang Plain].
Total mercury concentration of typical wetland plant was analyzed. There were great difference in mercury content among different plants, and the order was moss > alga > carex > herb > shrub. There was a trend of increasing total Hg concentrations from vascular plants to bryophytes, and from dry to wet site. The wetland soil was the source of mercury in the air close to the ground, so it influenced the content of mercury in the plant. In different components of plants, mercury contents were in the order of dead stand > root > leaf > stem. Mercury concentration increased in initial stage and decreased in the end of the growing season. According to the mercury content and biomass, the mercury stock of plant were calculated, and it was 24.9 micrograms.m-2 in the above ground of plant in Calamagrostis angustifolia wetland and 35.8 micrograms.m-2 in Carex lasiocarpa wetland.
Liu
Ruhai
R
Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China. ruhailiu@163.com
Wang
Qichao
Q
Lu
Xianguo
X
Li
Zhibo
Z
Wang
Yan
Y
D008628:Mercury / Q000032:analysis*; D010944:Plants / Q000737:chemistry*; D012621:Seasons; D012987:Soil / Q000032:analysis
D012987:Soil; D008628:Mercury