17 research outputs found
Optimum operational conditions for chiral separation of tryptophan enatiomers using ligand exchange liquid chromatography
Severe drought-induced community tolerance to heat wave. An experimental study on soil microbial processes
Electrochemical Detection of Low-Molecular-Mass Biothiols in Biological Fluids at Carbon Spheres-Modified Glassy Carbon Electrodes
Fabrication and Characterization of Solid Mercury Amalgam Electrodes for Protein Analysis
The effect of storage on microbial activity and bacterial community structure of drained and flooded paddy soil
Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
The temporal dynamics of desert soil microbial communities are poorly understood. Given the
implications for ecosystem functioning under a global change scenario, a better understanding of
desert microbial community stability is crucial. Here, we sampled soils in the central Namib Desert
on sixteen different occasions over a one-year period. Using Illumina-based amplicon sequencing of
the 16S rRNA gene, we found that α-diversity (richness) was more variable at a given sampling date
(spatial variability) than over the course of one year (temporal variability). Community composition
remained essentially unchanged across the first 10 months, indicating that spatial sampling might be
more important than temporal sampling when assessing β-diversity patterns in desert soils. However,
a major shift in microbial community composition was found following a single precipitation event. This
shift in composition was associated with a rapid increase in CO2 respiration and productivity, supporting
the view that desert soil microbial communities respond rapidly to re-wetting and that this response
may be the result of both taxon-specific selection and changes in the availability or accessibility of
organic substrates. Recovery to quasi pre-disturbance community composition was achieved within one
month after rainfall.The National Research Foundation of South Africa (grant no.
81779 and TTK2008052000003), the Research Council of Norway (grant No. 180352) and the University of the
Western Cape. Partial support was also provided under the Laboratory Directed Research and Development Program at PNNL, a multiprogram national laboratory operated by Battelle for the U.S. Department of
Energy under contract DE-AC05-76RL01830.http://www.nature.com/scientificreportsam2016Genetic