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Analysis of the microbial communities in soils of different ages following volcanic eruptions

Pedosphere 2020年第1期30卷 126-134页

作者： marcela HERNáNDEZ marcela calabi Ralf CONRAD Marc G.DUMONT Max Planck Institute for Terrestrial Microbiology Karl-von-Frisch-Str.10Marburg 35043(Germany) Scientific and Technological Bioresource Nucleus Universidad de La FronteraTemuco(Chile) School of Biological Sciences University of SouthamptonSouthampton SO171BJ(UK)

Volcanism is a primary process of land *** provides a model for understanding soil-forming processes and the role of pioneer bacteria and/or archaea as early colonizers in those new *** objective of this study was to identify the microbial communities involved in soil *** was extracted from soil samples from the Llaima volcano in Chile at sites destroyed by lava in different centuries(1640,1751,and 1957).Bacterial and archaeal 16 S r RNA genes were analyzed using quantitative polymerase chain reaction(q PCR)and Illumina Mi Seq *** showed that microbial diversity increased with soil age,particularly between the 1751 and 1640 *** archaeal communities,Thaumarchaeota was detected in similar abundances in all soils,but Euryarchaeota was rare in the older *** analysis of bacterial 16 S r RNA genes showed high abundances of Chloroflexi(37%),Planctomycetes(18%),and Verrucomicrobia(10%)in the youngest *** and Acidobacteria were highly abundant in the older soils(16%in 1640 and 15%in 1751 for Acidobacteria;38%in 1640 and 27%in 1751 for Proteobacteria).The microbial profiles in the youngest soils were unusual,with a high abundance of bacteria belonging to the order Ktedonobacterales(Chloroflexi)in the 1957 soil(37%)compared with the 1751(18%)and 1640(7%)*** this study,we show that there is a gradual establishment of the microbial community in volcanic soils following an eruption and that specific microbial groups can colonize during the early stages of recovery.

关键词： 16S rRNA gene extreme environment high-throughput sequencing Ktedonobacterales microbial diversity pioneer microbe recolonization soil formation volcanic deposit

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