| Geographical distribution of general aerobic heterotrophic bacteria in surficial sediments from the Chukchi Sea and Canadian Basin |
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| 作者姓名： | 高爱国 陈皓文 |
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| 作者单位： | First Institute of Oceanography.SOA，First Institute of Oceanography.SOA Qingdao 266061，China，Qingdao 266061，China |
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| 基金项目： | second Arctic research expedition
,
crew on RV Xuelong for their support and assistance
,
国家自然科学基金 |
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| 摘 要： | This paper determined the abundance of General Aerobic heterotrophic Bacteria(GAB) in surficial sediments from the Chukchi Sea and the Canadian basin by using MPN and discussed their geographical distribution.The result shows that the determination percentages of the GAB were high,even till 100 percentage.The abundance range and averages of GAB for 4℃and 25℃ were from 4.00×102 to 2.40×106,1.71×106 ind.·g-1(wet sample) and from 2.40×105 to 2.40×107,1.10×107 ind.·g-1(wet sample) respectively.Not only the abundance range but also the averages of GAB in 25℃ were higher than that in 4℃.The abundance of GAB in sediments show a tendency that it is roughly greater in the lower latitudinal area than in the higher latitudinal area.The abundance of GAB increased from east to west as for the longitudinal distribution.With the water depth increasing,the abundance of GAB at 4℃ decreased,but GBA at 25℃ is not changed obviously with water depth.It seems that warmer circumstantial temperature is more suitable for some GAB.
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| 关 键 词： | 北冰洋 加拿大 盆地 GAB 地理分布 |
Geographical distribution of general aerobic heterotrophic bacteria in surficial sediments from the Chukchi Sea and Canadian Basin |
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| Gao Aiguo,Chen Haowen.Geographical distribution of general aerobic heterotrophic bacteria in surficial sediments from the Chukchi Sea and Canadian Basin[J].Chinese Journal of Polar Science,2007,18(2):147-154. |
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| Authors: | Gao Aiguo Chen Haowen |
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| Institution: | First Institute of Oceanography.SOA, Qingdao 266061, China |
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| Abstract: | This paper determined the abundance of General Aerobic heterotrophic Bacteria (GAB) in surficial sediments from the Chukchi Sea and the Canadian basin by using MPN and discussed their geographical distribution.The result shows that the determination percentages of the GAB were high, even till 100 percentage.The abundance range and averages of GAB for 4℃ and 25℃ were from 4.00x102 to 2.40x 106, 1.71x106 ind.·g-1(wet sample) and from 2.40x105 to 2.40x107, 1.10x107 ind.·g-1(wet sample) respectively.Not only the abundance range hut also the averages of GAB in 25℃ were higher than that in 4℃.The abundance of GAB in sediments show a tendency that it is roughly greater in the lower latitudinal area than in the higher latitudinal area.The abundance of GAB increased from east to west as for the longitudinal distribution.With the water depth increasing, the abundance of GAB at 4℃ decreased, but GBA at 25℃ is not changed obviously with water depth.It seems that warmer circumstantial temperature is more suitable for some GAB. |
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| Keywords: | the Arctic Ocean the Chukchi Sea the Canadian Basin General Aerobic Heterotrophic Bacteria(GAB) geographic distribution |
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