PMID- 28713363 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201001 IS - 1664-302X (Print) IS - 1664-302X (Electronic) IS - 1664-302X (Linking) VI - 8 DP - 2017 TI - Geographic Distribution of Ammonia-Oxidizing Archaea along the Kuril Islands in the Western Subarctic Pacific. PG - 1247 LID - 10.3389/fmicb.2017.01247 [doi] LID - 1247 AB - Community composition and abundance of ammonia-oxidizing archaea (AOA) in the ocean were affected by different physicochemical conditions, but their responses to physical barriers (such as a chain of islands) were largely unknown. In our study, geographic distribution of the AOA from the surface photic zone to the deep bathypelagic waters in the western subarctic Pacific adjacent to the Kuril Islands was investigated using pyrosequencing based on the ammonia monooxygenase subunit A (amoA) gene. Genotypes of clusters A and B dominated in the upper euphotic zone and the deep waters, respectively. Quantitative PCR assays revealed that the occurrence and ammonia-oxidizing activity of ammonia-oxidizing archaea (AOA) reached their maxima at the depth of 200 m, where a higher diversity and abundance of actively transcribed AOA was observed at the station located in the marginal sea exposed to more terrestrial input. Similar community composition of AOA observed at the two stations adjacent to the Kuril Islands maybe due to water exchange across the Bussol Strait. They distinct from the station located in the western subarctic gyre, where sub-cluster WCAII had a specific distribution in the surface water, and this sub-cluster seemed having a confined distribution in the western Pacific. Habitat-specific groupings of different WCB sub-clusters were observed reflecting the isolated microevolution existed in cluster WCB. The effect of the Kuril Islands on the phylogenetic composition of AOA between the Sea of Okhotsk and the western subarctic Pacific is not obvious, possibly because our sampling stations are near to the Bussol Strait, the main gateway through which water is exchanged between the Sea of Okhotsk and the Pacific. The vertical and horizontal distribution patterns of AOA communities among stations along the Kuril Islands were essentially determined by the in situ prevailing physicochemical gradients along the two dimensions. FAU - Jing, Hongmei AU - Jing H AD - CAS Key Laboratory for Experimental Study under Deep-sea Extreme Conditions, Institute of Deep-sea Science and Engineering, Chinese Academy of SciencesSanya, China. FAU - Cheung, Shunyan AU - Cheung S AD - Division of Life Science, The Hong Kong University of Science and TechnologyKowloon, China. FAU - Xia, Xiaomin AU - Xia X AD - Division of Life Science, The Hong Kong University of Science and TechnologyKowloon, China. FAU - Suzuki, Koji AU - Suzuki K AD - Faculty of Environmental Earth Science, Hokkaido UniversitySapporo, Japan. FAU - Nishioka, Jun AU - Nishioka J AD - Institute of Low Temperature Science, Hokkaido UniversitySapporo, Japan. FAU - Liu, Hongbin AU - Liu H AD - Division of Life Science, The Hong Kong University of Science and TechnologyKowloon, China. LA - eng PT - Journal Article DEP - 20170630 PL - Switzerland TA - Front Microbiol JT - Frontiers in microbiology JID - 101548977 PMC - PMC5492448 OTO - NOTNLM OT - AOA OT - amoA OT - geographic distribution OT - pyrosequencing EDAT- 2017/07/18 06:00 MHDA- 2017/07/18 06:01 PMCR- 2017/06/30 CRDT- 2017/07/18 06:00 PHST- 2017/02/15 00:00 [received] PHST- 2017/06/20 00:00 [accepted] PHST- 2017/07/18 06:00 [entrez] PHST- 2017/07/18 06:00 [pubmed] PHST- 2017/07/18 06:01 [medline] PHST- 2017/06/30 00:00 [pmc-release] AID - 10.3389/fmicb.2017.01247 [doi] PST - epublish SO - Front Microbiol. 2017 Jun 30;8:1247. doi: 10.3389/fmicb.2017.01247. eCollection 2017.