In order to understand the characteristics of migration and distribution of heavy metals in the wetland ecosystem

four types of samples were collected from soil

water

reeds and fish in Longfeng wetland of Daqing City in summer 2011

the content of Cu

Cd

Zn

Pb

As and Hg were measured by atomic absorption spectrophotometry(AAS)and the correlation was analyzed statistically.The results demonstrated that the environment in Longfeng wetland was in a good quality with the heavy metal content below the average of the Songnen Plain and the quality of the water body better than the classⅡ standard surface water.The heavy metal enrichment was different between animals and plants

of which the metal content in fish is in the order of Zn>Cd>Cu>As>Hg>Pb

and in reeds Cd>Hg>Zn>Cu>As>Pb.The results indicated that there were significant positive correlation of heavy metal content between plants

fish while there was some positive correlation but not significant among water bodies

plants and fishes.