【Title】THE SURVEY OF MARINE MICROORGANISMS IN LOW TEMPERATURES OF CHUKCHI AND BERING SEA
【摘要】在 1 999年北极夏季期间对楚科奇海和白令海的海洋低温微生物进行了调查。在楚科奇海 ,海洋细菌和海洋真菌的检出率分别为 1 0 0 %和 >94% ,其相应的总量一般分别为 >1 0 3 cells/cm3 和 1 0 1— 1 0 3 cells/cm3 ;在大多数站位 ,海洋细菌的总量通常都高于海洋真菌的总量 ;从表层至 1 0 m或 3 0 m深层的海水区域 ,分布有丰富的海洋微生物。调查结果还显示 ,不同站位间的海洋微生物总量存在明显差异 ,海冰的融化和海水中的盐度可能是影响这一海区海洋微生物总量的重要因素。在白令海 ,海洋细菌的检出率为 1 0 0 % ,其总量一般在 1 0 2 — 1 0 3 cells/cm3 ;海洋真菌的检出率 >84% ,其总量一般也在 1 0 2 — 1 0 3 cells/cm3 。白令海不同站位间的海洋微生物总量也存在较大的差异。调查结果证实在楚科奇海和白令海的确存在大量的低温海洋微生物 ,在所研究的海洋细菌中 ,分别有 81 %的楚科奇海细菌和 88.9%的白令海细菌能够在低温条件下 (<1 0℃ )良好生长 ,而且有部分菌株能够在低温条件下分解利用淀粉或纤维素等多糖物质以满足自身生长的营养需求。这些海洋低温菌株为进一步开发利用这些海域的海洋微生物资源提供了充足的材料
【Abstract】Investigations of total number of marine microbes in low temperatures of Chukchi Sea and Bering sea were conducted during the summer time in north hemisphere. In Chukchi Sea the detection rates of marine bacteria and fungi were 100% and more than 94%, respectively. And the quantity of marine bacteria generally was more than 10 3 cells/cm 3, and that of marine fungi usually 10-10 3 cells/cm 3. In most investigation sites marine bacterial total numbers were higher than marine fungal total numbers. There are abundant marine microorganisms distributing in the areas from surface water to deeper layers of 10m or 30m depth in Chukchi Sea. Results showed that there were large differences of marine microbial total numbers between different sampling sites, and the melt sea ice and salinity in sea water were probably two important factors affecting the marine microbial amounts in Chukchi Sea. As to marine bacteria in Bering sea, their detection rates were 100% and their amounts were generally 10 2-10 3 cells/cm 3. For marine fungi, their detection rates were more than 84% and their amounts generally 10 2-10 3 cells/cm 3. Similar to the situation in Chukchi Sea, there were fairly large differences of marine microbial total numbers between different sampling sites in Bering Sea, too.The investigation results proved that a large number of marine microbes in low temperatures lived in Chukchi and Bering Sea. Among the marine bacteria studied, 81% of bacteria from Chukchi Sea and 88.9% of bacteria from Bering sea can grow well in low temperatures no higher than 10℃. And some of these marine bacteria can utilize starch or cellulose as carbon source for their growth. These microbes can provide abundant materials for further exploiting and developing the marine microbe resources in low temperature.