Detecting macroecological patterns in bacterial communities across independent studies of global soils.
|Authors||Ramirez, Kelly S., Knight, Christopher G., de Hollander, Mattias, Brearley, Francis Q., Constantinides, Bede, Cotton, Anne, Creer, Si, Crowther, Thomas W., Davison, John, Delgado-Baquerizo, Manuel, Dorrepaal, Ellen, Elliott, D., Fox, Graeme, Griffiths, Robert I., Hale, Chris, Hartman, Kyle, Houlden, Ashley, Jones, David L., Krab, Eveline J., Maestre, Fernando T., McGuire, Krista L., Monteux, Sylvain, Orr, Caroline H., van der Putten, Wim H., Roberts, Ian S., Robinson, David A., Rocca, Jennifer D., Rowntree, Jennifer, Schlaeppi, Klaus, Shepherd, Matthew, Singh, Brajesh K., Straathof, Angela L., Bhatnagar, Jennifer M., Thion, Cécile, van der Heijden, Marcel G. A. and de Vries, Franciska T.|
The emergence of high-throughput DNA sequencing methods provides unprecedented opportunities to further unravel bacterial biodiversity and its worldwide role from human health to ecosystem functioning. However, despite the abundance of sequencing studies, combining data from multiple individual studies to address macroecological questions of bacterial diversity remains methodically challenging and plagued with biases. Here, using a machine-learning approach that accounts for differences among studies and complex interactions among taxa, we merge 30 independent bacterial data sets comprising 1,998 soil samples from 21 countries. Whereas previous meta-analysis efforts have focused on bacterial diversity measures or abundances of major taxa, we show that disparate amplicon sequence data can be combined at the taxonomy-based level to assess bacterial community structure. We find that rarer taxa are more important for structuring soil communities than abundant taxa, and that these rarer taxa are better predictors of community structure than environmental factors, which are often confounded across studies. We conclude that combining data from independent studies can be used to explore bacterial community dynamics, identify potential ‘indicator’ taxa with an important role in structuring communities, and propose hypotheses on the factors that shape bacterial biogeography that have been overlooked in the past.
|Keywords||Microbial ecology; Soil; Diversity; Community structure; Illumina sequencing; 16S rRNA gene; Biogeography; Microbiology; Meta-analysis|
|Digital Object Identifier (DOI)||https://doi.org/10.1038/s41564-017-0062-x|
|Web address (URL)||http://hdl.handle.net/10545/622077|
|Publication dates||20 Nov 2017|
|Publication process dates|
|Deposited||25 Jan 2018, 15:16|
|Accepted||13 Oct 2017|
Archived with thanks to Nature Microbiology
|Contributors||Netherlands Institute of Ecology, University of Manchester, Manchester Metropolitan University, University of Sheffield, Bangor University, University of Tartu, University of Colorado, Umeå University, University of Derby, Centre of Ecology and Hydrology, University of Warwick, Agroscope, Universidad Rey Juan Carlos, University of Oregon, Teeside University, Wageningen University, Duke University, Natural England, Western Sydney University, Boston University and University of Aberdeen|
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