| Abstract: | The sea ice core (1. 6m) and lake ice core (1. 5m) were taken respectively from sea sampling site and Ace Lake near Davis Station, Vestfold Hills, Antarctica in November and October, 1988. The concentrations of amino acids in each 10cm of ice cores were determined by High Pressure Liquid Chromatography (HPLC). The results showed that the concentrations of amino acids revealed seasonal variation during the year. The highest concentration of amino acids, which was 30. 92 /μmol/ml, were found in the bottom of sea ice core, and it was approximately 45 μmol/ml in the lake ice core. The lowest concentration was approximately 8. 0μmol/ml which is presented in surface of the sea ice core, but it was 14.0μmol/ml which was found in 60cm section of lake ice core.
The seasonal variation process of concentration of amino acids were much similar to that of phytoplankton cells number in sea ice core, and the distribution and seasonal variation rate of individual amino acids were also much similar in each ice core sections. We suggest that the uniform spectrum of amino acids is probably derived from a peptide cell source and those amino acids were not utilized by organism. |
