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Author (up) Ramirez-Flandes, S.; Gonzalez, B.; Ulloa, O. doi  openurl
  Title Redox traits characterize the organization of global microbial communities Type Journal Article
  Year 2019 Publication Proceedings Of The National Academy Of Sciences Of The United States Of America Abbreviated Journal Proc. Natl. Acad. Sci. U. S. A.  
  Volume 116 Issue 9 Pages 3630-3635  
  Keywords microbial ecology; functional traits; oxidoreductases; biomes; metagenomics  
  Abstract The structure of biological communities is conventionally described as profiles of taxonomic units, whose ecological functions are assumed to be known or, at least, predictable. In environmental microbiology, however, the functions of a majority of microorganisms are unknown and expected to be highly dynamic and collectively redundant, obscuring the link between taxonomic structure and ecosystem functioning. Although genetic trait-based approaches at the community level might overcome this problem, no obvious choice of gene categories can be identified as appropriate descriptive units in a general ecological context. We used 247 microbial metagenomes from 18 biomes to determine which set of genes better characterizes the differences among biomes on the global scale. We show that profiles of oxidoreductase genes support the highest biome differentiation compared with profiles of other categories of enzymes, general protein-coding genes, transporter genes, and taxonomic gene markers. Based on oxidoreductases' description of microbial communities, the role of energetics in differentiation and particular ecosystem function of different biomes become readily apparent. We also show that taxonomic diversity is decoupled from functional diversity, e. g., grasslands and rhizospheres were the most diverse biomes in oxidoreductases but not in taxonomy. Considering that microbes underpin biogeochemical processes and nutrient recycling through oxidoreductases, this functional diversity should be relevant for a better understanding of the stability and conservation of biomes. Consequently, this approach might help to quantify the impact of environmental stressors on microbial ecosystems in the context of the global-scale biome crisis that our planet currently faces.  
  Address [Ramirez-Flandes, Salvador; Ulloa, Osvaldo] Univ Concepcion, Dept Oceanog, Concepcion 4070386, Chile, Email: sram@udec.cl;  
  Corporate Author Thesis  
  Publisher Natl Acad Sciences Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0027-8424 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000459694400048 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 985  
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