Physical and chemical and micribiological characteristic of ice of lake Doroninskoye (Transbaikalia)

Hydrochemical and microbiological researshes in the ice covering of Lake Doroninskoye were carried out in 2009 and 2012. Thickness of the ice was 122-125 sm. The pH value of the ice was 9.9-10.7, mineralization varied from 2.09 to 5.15 g/l and from 3.28 to 4.37. The total amount of microorganisms in the ice core in March 2009 varied from 110 thousand up to 42 1 0 4 cells/ml, in April 2012 the amount was much lower and it reached 24-42 thousand cells/ml. Speed of dark fixing in ice water varied from 10.51 to 28.97 mkg C/(dm per day).