Microbial Ecology, 2016, Vol.72(3), p.717(8)
To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1007/s00248-016-0810-0 Byline: Rory Michelland (1,2,3), Jean Thioulouse (1,2,4), Martina Kyselkova (5), Genevieve L. Grundmann (1,2,3) Keywords: Abundancy-occupancy relationship; Bacteria community structure; Microscale in soil; Frequency-occupancy relationship; Soil microbial diversity; Soil structure Abstract: The spatial distributions of bacteria in the soil matrix have a role in ecosystem function, for example, at the small scale, through gene transfer or xenobiotic degradation. Soil bacterial biogeography has been evidenced at the large scale, but data are scarce at the small scale. The objective of this work was to determine the spatial pattern of bacterial diversity, in spatially referenced microsamples, in order to define bacterial community spatial traits. Two soils with different physical structures, moderately aggregated (La Cote St Andre (LCSA)) or poorly aggregated (La Dombes (LD)), were studied. The spatial distribution of bacteria was studied in microsamples (diameter 3 mm) along 10- and 20-cm transects, with a taxonomic microarray. 16S rRNA gene sequencing was used to further study the spatial characteristics of the microbial communities in LD soil. The frequency-occupancy plot, in the LCSA and LD soils, using microarray and sequencing data, followed Hanski's core-satellite theory. The frequency-occupancy distribution plots obtained in two different soils showed bimodality and indicated that the microscale spatial distributions were different, particularly core taxa percentage. Core taxa are widespread and abundant, while satellite taxa are restricted in their distribution. The spread of satellite taxa was at a distance range larger than 5 cm, whereas the core taxa were distributed in a distance range less than 3 mm. Besides, there was a positive abundancy-occupancy relationship at this fine scale. It may be interesting to further evaluate the role of the different bacterial spatial distributions at the fine scale on soil function. Author Affiliation: (1) Universite de Lyon, 69622, Lyon, France (2) Universite Lyon 1, Villeurbanne, France (3) CNRS, UMR5557, Ecologie Microbienne, Villeurbanne, France (4) CNRS, UMR5558, Laboratoire de Biometrie et Biologie Evolutive, Villeurbanne, France (5) Institute of Soil Biology, Biology Centre of the Czech Academy of Sciences, Ceske BudAjovice, Czech Republic Article History: Registration Date: 27/06/2016 Received Date: 03/11/2015 Accepted Date: 27/06/2016 Online Date: 14/07/2016 Article note: Electronic supplementary material The online version of this article (doi: 10.1007/s00248-016-0810-0) contains supplementary material, which is available to authorized users.
Soil Microbiology ; Bacteria ; Soil Structure ; Soils ; RNA