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Taxonomic and metabolic shifts in the Coorong bacterial metagenome driven by salinity and external inputs

Journal of Oceanology and Limnology 2018年第6期36卷 2033-2049页

作者： Kelly NEWTON Thomas C.JEFFRIES renee J.smith Justin R.SEYMOUR Laurent SEURONT James G.MITCHELL School of Biological Sciences Flinders University School of Science and Health Western Sydney University Flinders Centre for Innovation in Cancer Flinders University Climate Change Cluster University of Technology Sydney Centre National de la Recherche Scientifi que Laboratoire d'Océanologie et de Géosciences

The Coorong estuary lies at the terminus of Australia's largest river system, the Murray-Darling; both are strongly influenced by human activities; including farming and extensive flow modification. Metagenomic approaches were used to determine the planktonic bacterial community composition and potential metabolic function at two extremes in the Coorong, the river mouth which exhibits marine-like salinity, and the hypersaline upper-reaches of the estuary. Significant shifts in taxa and metabolic function were seen between the two sites. The river mouth exhibited an increase in abundance of R hodobacteriaceae and Alteromonadaceae; families readily able to adapt to change in nutrient conditions; and the potentially pathogenic families B rucellaceae, Enterobacteriaceae and Vibrionaceae. Metabolisms over-represented include motility and chemotaxis, RNA metabolism and membrane transport, all of which are involved in actively searching for and obtaining nutrients. Also over-represented were metabolisms involved in population succession and stress response. An over-representation of taxa and metabolisms indicative of environmental change is reflective of anthropogenically af fected riverine input. In the hypersaline upper reaches of the estuary, the halophilic family Ectothiorhodospiraceae was over-represented, as were the families Flavobacteriaceae, Cytophagaceae and Nocardioidaceae, members of which are able to survive over a wide salinity range. Metabolisms over-represented here were reflective of increased bacterial growth, characteristic of hypersaline environments, and included DNA metabolism, nucleotide and nucleoside synthesis and cell cycle. Coorong metagenomes clustered taxonomically and metabolically with other planktonic metagenomes, but remained an outlier of this group with only 71% and 84% similarity, respectively. This indicates that the Coorong exhibits a unique planktonic bacterial community that is influenced by riverine input at the river mouth and sali

关键词： hypersaline estuary bacteria taxonomy metabolic potential

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建立卒中医疗体系的建议美国卒中协会特别工作组关于建立卒中体系的建议

引用

国际脑血管病杂志 2005年第12期13卷 883-894页

作者： Lee H. Schwamm Arthur Pancioli Joe E. Acker Ⅲ Larry B. Goldstein Richard D. Zorowitz Timothy J. Shephard Peter Moyer Mark Gorman S. Claiborne Johnston Pamela W. Duncan Phil Gorelick Jeffery Frank Steven K. Stranne renee smith William Federspiel Katie B. Horton Ellen Magnis Robert J. Adams 林豪杰董继宏金丽蓉彭伟锋汪昕复旦大学附属中山医院神经内科

在美国,卒中一直是残疾和死亡的重要原因.每年约有70万例美国人新发或复发卒中,在与其他心血管病分开评价时,卒中在美国仍是第三位死亡原因.在美国卒中还是严重和长期残疾的第一位原因[1].

关键词：初级卒中中心二级预防患者医务人员医务工作者急性卒中防治体系医疗体系美国卒中协会医疗亚急性期工作组

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