Foundation item: The Natioral Natural Science Foundation of China(No, 20237010) and the Chinese Academy of Sciences for Key and Innovation Projects( KECX3-SW- 437).
This work was supported in part by the Key Project of the Ninth Five—year Resource and Ecological Environ—ment,CAS(Grant No.KZ952一S1-201); the National Natural Science Foundation of China(Grant No.30370262).
Twice a year continuous samples of Rana Chensinensis and sediments have been collected near gold mine in the upstream region of Songhua River from 2000 to 2002, for analyzing the total mercury (THg), methylmercury (Me...