【摘要】 为了解南极淡水生态系统的水化学特征，完成了拉斯曼丘陵地区１３个湖泊和菲尔德斯半岛１０个湖泊以及雪样的调查分析。西南极乔治王岛菲尔德斯半岛和东南极拉斯曼丘陵的气候条件不同，前者属于极地海洋性气候、气温不很低、湿润、风小、夏季较长；后者属于极地大陆性气候、气温低，冬天严寒、干燥、风大，夏季较短。因此，两地区的湖泊地貌、成因、发育、水生生物种群结构以及水化学状态存在较明显的差异，虽然水化学类型均比较单一，但矿化度却相差甚大。本文还对两区饮水水源进行了评价。更多还原

【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.更多还原