Investigations were made on the microbes in the air, bottom sediments, surface seawater in the sea area of the South Shetland Islands during December, 1986～March, 1987.The results obtained show that: from the air ove...Investigations were made on the microbes in the air, bottom sediments, surface seawater in the sea area of the South Shetland Islands during December, 1986～March, 1987.The results obtained show that: from the air over the South Shetland Islands and the Maxwell Bay,the detection rate of terrigenous microbes was more than 90% and their amount was generally a few CFU/m3; the detection rate of marine microbes was more than 50% and their amount only 1 CFU/m3. The amounts of air-borne microbes over the surveyed area were the witness to their diurnal variations. They were influenced to some extent by nearby islands. Air temperature and relative humidity,etc. were factors affecting their quantitative variations.The bacterial amount of the outshore surface sea water in the Great Wall Bay, Antarctica was about n×10 CUF/cm3 (0≤n<10, the same below), the amount of microbes decreased with the monthly dropping of seawater temperature and showed a state of diurnal variations. The seawater in the Bay has been fairly clean. The microbial community consisted of at least thirteen genera,in which pseudomonas was common. In the intertidal zone of the Deception Island,there were only a few CFU of bacteria per cubic meter in seawater; and n×10 CFU/g (w. w) in the surface sediment;and n×10 CFU/g(w. w) in the volcano ash.The results reveal the general features of the microbes from the air,sea and land in the South Shetland Islands, Antarctica. It provides data for further study of microbial resources in that area.展开更多
文摘Investigations were made on the microbes in the air, bottom sediments, surface seawater in the sea area of the South Shetland Islands during December, 1986～March, 1987.The results obtained show that: from the air over the South Shetland Islands and the Maxwell Bay,the detection rate of terrigenous microbes was more than 90% and their amount was generally a few CFU/m3; the detection rate of marine microbes was more than 50% and their amount only 1 CFU/m3. The amounts of air-borne microbes over the surveyed area were the witness to their diurnal variations. They were influenced to some extent by nearby islands. Air temperature and relative humidity,etc. were factors affecting their quantitative variations.The bacterial amount of the outshore surface sea water in the Great Wall Bay, Antarctica was about n×10 CUF/cm3 (0≤n<10, the same below), the amount of microbes decreased with the monthly dropping of seawater temperature and showed a state of diurnal variations. The seawater in the Bay has been fairly clean. The microbial community consisted of at least thirteen genera,in which pseudomonas was common. In the intertidal zone of the Deception Island,there were only a few CFU of bacteria per cubic meter in seawater; and n×10 CFU/g (w. w) in the surface sediment;and n×10 CFU/g(w. w) in the volcano ash.The results reveal the general features of the microbes from the air,sea and land in the South Shetland Islands, Antarctica. It provides data for further study of microbial resources in that area.
