Differences in precipitation regime shape microbial community composition and functional potential in Namib Desert soils
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Date
Authors
Naidoo, Yashini
Valverde, Angel
Pierneef, Rian Ewald
Cowan, Don A.
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
Precipitation is one of the major constraints influencing the diversity, structure, and activity of soil microbial communities in desert ecosystems. However, the effect of changes in precipitation on soil microbial communities in arid soil microbiomes remains unresolved. In this study, using 16S rRNA gene high-throughput sequencing and shotgun metagenome sequencing, we explored changes in taxonomic composition and functional potential across two zones in the Namib Desert with contrasting precipitation regime. We found that precipitation regime had no effect on taxonomic and functional alpha-diversity, but that microbial community composition and functional potential (beta-diversity) changed with increased precipitation. For instance, Acidobacteriota and ‘resistance to antibiotics and toxic compounds’ related genes were relatively more abundant in the high-rainfall zone. These changes were largely due to a small set of microbial taxa, some of which were present in low abundance (i.e. members of the rare biosphere). Overall, these results indicate that key climatic factors (i.e. precipitation) shape the taxonomic and functional attributes of the arid soil microbiome. This research provides insight into how changes in precipitation patterns associated with global climate change may impact microbial community structure and function in desert soils.
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Keywords
16S rRNA metagenomic sequencing, Shotgun metagenomics, Precipitation regime, Namib desert, Functional potential
Sustainable Development Goals
Citation
Naidoo, Y., Valverde, A., Pierneef, R.E. et al. Differences in Precipitation Regime Shape Microbial Community Composition and Functional Potential in Namib Desert Soils. Microbial Ecology 83, 689–701 (2022). https://doi.org/10.1007/s00248-021-01785-w.