【摘要】 对中国第2次北极科学考察海洋表层沉积物(0～1 cm)中硫酸盐还原菌进行4℃、25℃的培养实验,结合首次北极科学考察海洋沉积物硫酸盐还原菌研究成果,研究了研究区硫酸盐还原菌丰度的分布。结果表明,4℃培养得出硫酸盐还原菌丰度为0～2.4×104个/g(湿样),平均3 433个/g(湿样),并呈现有规律的分布趋势:低纬区的高于高纬区的,浅水区的高于深水区的。本区硫酸盐还原菌丰度高于中国东海、南海和黄海部分海区沉积物中的,低于胶州湾以及西北冰洋某些海区中的。25℃培养时硫酸盐还原菌丰度为0～2.4×104个/g(湿样),平均4 062个/g(湿样),在1 880 m以浅水域其丰度与4℃培养时的一致,而在1 880 m以深水域其丰度高于4℃培养时丰度。更多还原

【Abstract】 The surficial sediment samples from the Canada Basin and Chukchi Sea were collected during the second Chinese Arctic scientific expedition,the culture experiments on sulphate-reducing bacteria(SRB) in surficial sediments at 4 ℃ and 25 ℃ temperatures were made,and the distributions of SRB abundance in surficial sediments from the study area were studied in combination with the SRB study results for the first Chinese Arctic scientific expedition.It is shown from the study results that the SRB abundance cultured at 4 ℃ is in the range 0 to 2.4×104 cells/g(wet sample) with an anverge of 3 433 cells/g,and shows a distribution trend,that is,the SRB abundance is higher in low latitude area than in high latitude area,and higher in shallow water area than in deep water area.The SRB abudance in surficial sediments from the sea area is higher than those from the East China Sea,South China Sea and part of the Yellow Sea and lower than those from the Jiaozhou Bay and some sea areas of the western Arctic Ocean.The SRB abundance cultured at 25 ℃ is in the range 0 to 2.4×104 cells/g(wet sample) with an average of 4 062 cells/g,the SRB abundance cultured at 25 ℃ from water depth less than 1 880 m is consistent with that cultured at 4 ℃,but the SRB abundance cultured at 25 ℃ from water depth greater than 1 880 m is higher than that cultured at 4 ℃.更多还原