Geographical distribution of general aerobic heterotrophic bacteria in surficial sediments from the Chukchi Sea and Canadian Basin

• Main Authors: Aiguo, Gao, Haowen, Chen
• Format: Article in Journal/Newspaper
• Language: English
• Published: Polar Research Institute of China - PRIC 2007
• Subjects: Oceans; Chukchi Sea; Advances in Polar Science; Chukchi; Polar Science
• Online Access: http://library.arcticportal.org/2340/; http://library.arcticportal.org/2340/1/A200702005.pdf

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°C and 25°C were from 4.00 x 10(2) to 2.40 x 10(6) ind. * g(-1) (wet sample) and from 2.40 x 10.5 to 2.40 x 10(7), 1.10 x 10(7) ind. * g(-1) (wet sample) respectively. Not only the abundance range but also the averages of GAB in 25°C were higher than that in 4°C. 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°C decreased, but GBA at 25°C is not changed obviously with water depth. It seems that warmer circumstantial temperature is more suitable for same GAB.