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现代地质 ›› 2007, Vol. 21 ›› Issue (1): 101-104.

• 水合物 • 上一篇    下一篇

南海北部冷泉区沉积物中微生物丰度与甲烷浓度变化关系的初步研究

苏新1, 陈芳2,魏士平1,张勇1,程思海2,陆红锋2,黄永样2   

  1. 1中国地质大学 海洋学院,北京100083; 2广州海洋地质调查局,广东 广州510760
  • 收稿日期:2006-12-10 修回日期:2007-01-20 出版日期:2007-01-20 发布日期:2007-01-20
  • 作者简介:苏新,女,教授,1957年出生,地层古生物专业,主要从事钙质超微化石、海洋地质和资源方面的研究。 Email:xsu@cugb.edu.cn。
  • 基金资助:

    国家自然科学基金项目(40672005)

Preliminary Study on the Correlation between Microbial Abundance and Methane Concentration in Sediments from Cold Seeps  in the Northern South China Sea

SU Xin1, CHEN Fang2, WEI Shi-ping1, ZHANG Yong1, CHENG Si-hai2, LU Hong-feng2, HUANG Yong-yang2   

  1. 1School of Marine Geosciences, China University of Geosciences, Beijing100083,China;
    2Guangzhou Marine Geological Survey, Guangzhou,Guangdong510760,China
  • Received:2006-12-10 Revised:2007-01-20 Online:2007-01-20 Published:2007-01-20

摘要:

对2006年“海洋四号”在南海北部陆坡和深水冷泉活动区获得的两个重力活塞岩心中微生物丰度变化和甲烷浓度变化的关系进行了初步研究。荧光显微镜观察和直接计数结果表明,研究区冷泉微生物细胞形态有多种类型,但常见和占优势的是杆状、球状和链状。微生物丰度随不同站位和深度变化于 106~105细胞个体/g之间。甲烷浓度高异常站位的微生物丰度大于甲烷浓度低的站位。在同一岩心中,微生物的丰度变化也和甲烷浓度变化相吻合,甲烷浓度高,微生物丰度大,反之亦然。该结果表明了冷泉微生物对沉积物中甲烷浓度的增加或减少十分敏感。

关键词: 微生物丰度, 甲烷浓度, 沉积物, 冷泉, 中国南海

Abstract:

A geomicrobiological study was carried out to investigate the relationship between variations of bacterial abundance and methane concentration. Bacterial samples from 2 gravity cores in cold seep areas on the continental slope of the Northern South China Sea, collected during 2006 “Haiyang 4” cruise, were analyzed by means of fluorescence microscopy. The result shows that bacterial abundance ranges from 106 cells/g to 105 cells/g sediment, and it is higher at the methane vent site than that of at the site far from a cold seep. Within the same sediment core from the methane vent site, bacterial abundance increases in the interval where methane concentration increased. This preliminary result suggests that variation in bacterial abundance seems to be sensitive to variations of methane concentration in cold seep sediments.

Key words: bacterial abundance, methane concentration, sediment, cold seep, the South China Sea

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