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Genomic insights into versatile lifestyle of three new bacterial candidate phyla

Science China(Life Sciences) 2022年第8期65卷 1547-1562页

作者： Xinxu Zhang Zongbao Liu Wei Xu Jie Pan Yuhan Huang Mingwei Cai Zhuhua Luo Meng Li Archaeal Biology Center Institute for Advanced StudyShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of marine Microbiome Engineering Institute for Advanced StudyShenzhen UniversityShenzhen 518060China Key Laboratory of marine Biogenetic Resources Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China School of marine Sciences Nanjing University of Information Science&TechnologyNanjing 210044China

Metagenomic explorations of the Earth's biosphere enable the discovery of previously unknown bacterial lineages of phylogenetic and ecological ***,we retrieved 11 metagenomic-assembled genomes(MAGs)affiliated to three new monophyletic bacterial lineages from the seawater of the Yap *** analysis revealed that each lineage is a new bacterial candidate phylum,subsequently named Candidatus Qinglongiota,Candidatus Heilongiota,and Candidatus *** reconstruction of genomes from the three phyla suggested that they adopt a versatile lifestyle,with the potential to utilize various types of sugars,proteins,and/or short-chain fatty acids through anaerobic *** was further confirmed by a global distribution map of the three phyla,indicating a preference for oxygen-limited or particle-attached niches,such as anoxic sedimentary *** note,Candidatus Canglongiota genomes harbor genes for the complete WoodLjungdahl pathway and sulfate reduction that are similar to those identified in some sulfate-reducing *** analysis indicated that gene gain and loss events,and horizontal gene transfer(HGT)play important roles in shaping the genomic and metabolic features of the three new *** study presents the genomic insight into the ecology,metabolism,and evolution of three new phyla,which broadens the phylum-level diversity within the domain Bacteria.

关键词： metagenomics horizontal gene transfer fermentation anaerobic respiration evolution marine habitat

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Dynamics of the Currents in the Strait of Khuran in the Persian Gulf

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Journal of Shipping and Ocean Engineering 2011年第2期1卷 109-115页

作者： N.H. Zaker P. Ghaffari S. Jamshidi M. Nourian Faculty of Environment University of Tehran Tehran 14178 Iran Iranian National Center for Oceanography Tehran 14178 Iran

The Strait of Khuran is among the most important marine habitats in the Persian Gulf. It is the location of the largest Avicennia Marina mangroves along the Persian Gulf shoreline and is a major nursery region for the fish and to breeding, wintering and migrant water birds. This paper presents dynamics of the currents in the Strait of Khuran using the current data collected by fixed current meters. The analysis of the data showed that the currents in the Strait of Khuran were highly dominated by tidal forcing with mixed semi diurnal behavior. The tidal currents were strong and reached to a maximum velocity of 123 cm/s in the spring tide. Tidal analysis showed that the tidal current constituents （M2, $2, N2, K1, O1） are dominant with M2 component as the major one. The tidal currents occurred basically along the strait. The results show a westward residual flow along the strait with an average of 5.6 cm/s during the study. The direction of the flow indicates that any pollution discharged into the industrial developing eastern part of the strait has the potential to affect the sensitive ecosystem in the western part.

关键词： Strait of Khuran marine habitat tidal currents harmonic analysis.

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