[Xylem anatomical characteristics of and relationship with climate in different slope positions].

With global climate warming, warming and drying in Northeast China are becoming more and more serious. To understand the effects of drought on the radial growth of at different slope positions in Xiaoxing'an Mountains, we analyzed the responses of xylem anatomical characteristics of to moisture change at different slope positions by wood anatomi-cal method. The results showed that on the upper and lower slope positions were the same in the changes of xylem anatomical parameters.

[Mercury Transport from Glacier to Runoff in Typical Inland Glacial Area in the Tibetan Plateau].

To investigate the transport of mercury from glacier to runoff in typical inland glacial area in the Tibetan Plateau, we selected Zhadang glacier and Qugaqie river Basin located in the Nyainqentanglha Range region and collected samples from snow pit, glacier melt-water and Qugaqie river water during 15th August to 9'h September 2011. Mercury speciation and concentrations were determined and their distribution and controlling factors in different environmental compartments were analyzed. The results showed that the average THg concentrations were (3.