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应用流式细胞技术分析了取自青藏高原西部慕士塔格冰川73m冰芯上部56.27m中细菌的数量变化,在1907～2000年的93年中,细菌年平均数在0.66×10~3ml(1982年)至6.91×10~3个/ml(1912年)之间变化,平均2.59x10~3个/ml。细菌数量的变化可分为10个不同的阶段,其中6个高峰期和4个低峰期,分别与氧同位素所反映的高温和低温期有较好的对应。冰芯中细菌数量除温度影响外,还受人类活动和陆源粉尘的影响。慕士塔格冰芯中细菌的数量远低于位于高原中部的各拉丹冬冰芯中细菌的数量,且慕士塔格冰芯中细菌数量受陆源粉尘的影响也小于各拉丹冬冰芯,可能是因为慕士塔格冰芯所处荒漠带植物稀少和土壤中细菌数量少所致,慕士塔格和各拉丹冬冰芯中细菌数量的不同反映了冰芯细菌对所处的不同生态环境的响应。
The number of bacteria in the 56.27 m ice core from the 73 m ice core of the Murtag Glacier in the western Qinghai-Tibetan Plateau was analyzed by flow cytometry. The average annual number of bacteria was 0.66 × 10 ~ 3 ml in the 93 years from 1907 to 2000 1982) to 6.91 × 10 ~ 3 / ml (1912), with an average of 2.59 × 10 ~ 3 / ml. The number of bacteria can be divided into 10 different stages, of which 6 peaks and 4 peaks, respectively, and oxygen isotopes reflect the high temperature and low temperature have a good response. In addition to the influence of temperature, the number of bacteria in the ice core is also affected by human activities and terrestrial dust. The number of bacteria in the Muztagtag ice core is much lower than the number of bacteria in each binaural ice core located in the middle of the plateau and the amount of bacteria in the Muztagar ice core is also less affected by terrestrial dust The core may be attributed to the scarcity of plants in the desert with Muztagata ice cores and the small number of bacteria in the soil. The difference in the number of bacteria in the Muztagat and Rudanberry ice cores reflects the presence of ice core bacteria The response of different ecological environment.