PMID- 24893665 OWN - NLM STAT- MEDLINE DCOM- 20150512 LR - 20140828 IS - 1432-0614 (Electronic) IS - 0175-7598 (Linking) VI - 98 IP - 18 DP - 2014 Sep TI - Bacteria dominate the ammonia-oxidizing community in a hydrothermal vent site at the Mid-Atlantic Ridge of the South Atlantic Ocean. PG - 7993-8004 LID - 10.1007/s00253-014-5833-1 [doi] AB - Ammonia oxidation is the first and rate-limiting step of nitrification, which is carried out by two groups of microorganisms: ammonia-oxidizing bacteria (AOB) and the recently discovered ammonia-oxidizing archaea (AOA). In this study, diversity and abundance of AOB and AOA were investigated in five rock samples from a deep-sea hydrothermal vent site at the Mid-Atlantic Ridge (MAR) of the South Atlantic Ocean. Both bacterial and archaeal ammonia monooxygenase subunit A (amoA) gene sequences obtained in this study were closely related to the sequences retrieved from deep-sea environments, indicating that AOB and AOA in this hydrothermal vent site showed typical deep ocean features. AOA were more diverse but less abundant than AOB. The ratios of AOA/AOB amoA gene abundance ranged from 1/3893 to 1/242 in all investigate samples, indicating that bacteria may be the major members responding to the aerobic ammonia oxidation in this hydrothermal vent site. Furthermore, diversity and abundance of AOA and AOB were significantly correlated with the contents of total nitrogen and total sulfur in investigated samples, suggesting that these two environmental factors exert strong influences on distribution of ammonia oxidizers in deep-sea hydrothermal vent environment. FAU - Xu, Wei AU - Xu W AD - Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, 178 Daxue Road, Xiamen, 361005, People's Republic of China. FAU - Li, Meng AU - Li M FAU - Ding, Jie-Fei AU - Ding JF FAU - Gu, Ji-Dong AU - Gu JD FAU - Luo, Zhu-Hua AU - Luo ZH LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140604 PL - Germany TA - Appl Microbiol Biotechnol JT - Applied microbiology and biotechnology JID - 8406612 RN - 7664-41-7 (Ammonia) SB - IM MH - Ammonia/*metabolism MH - Atlantic Ocean MH - Bacteria/*isolation & purification/*metabolism MH - Hydrothermal Vents/*microbiology EDAT- 2014/06/05 06:00 MHDA- 2015/05/13 06:00 CRDT- 2014/06/05 06:00 PHST- 2014/04/10 00:00 [received] PHST- 2014/05/14 00:00 [accepted] PHST- 2014/05/13 00:00 [revised] PHST- 2014/06/05 06:00 [entrez] PHST- 2014/06/05 06:00 [pubmed] PHST- 2015/05/13 06:00 [medline] AID - 10.1007/s00253-014-5833-1 [doi] PST - ppublish SO - Appl Microbiol Biotechnol. 2014 Sep;98(18):7993-8004. doi: 10.1007/s00253-014-5833-1. Epub 2014 Jun 4.