Abstract:

Comparison of lake water between regions on Fildes Peninsula and Larsemann Hills is reported. Results of this study indicate that the degree of mineralization and conductivity of water of Fildes Peninsula lakes are found to be 17-33 times and 3-4 times higher than that in Larsemann Hills lakes,respectively,but the hydrochemical types of lake water in both region are relatively the same with Na + and Cl - predominating. Nutrient contents in lakes of both districts are rather low,belonging to the oligotrophic type. T P concentrations in lake water of both regions are similar,but there is a marked difference in T N concentrations and T N of lake water in Larsemann Hills region is 2-10 times higher than that in Fildes Peninsula region. The composition of inorganic nitrogen in lake water of all Larsemann Hills lakes is dominated by NH 4 N,whereas in Fildes Peninsula lakes the concentrations of NH 4 N are similar to those of NO 3 N. In Fildes Peninsula region,concentrations of all trace elements Cu,Cr,Mn,Pb,Cd,Ni,Fe and Al in water are higher than those in Larsemann Hills region,with the exception of Zn. The concentrations of those elements in lakewater of both regions approach to the values of these elements in the hydrosphere,reflecting the congruity between the chemical composition of lake water and the state of natural background.