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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...

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Autores principales: Armstrong, Alacia, Valverde, Angel, Ramond, Jean-Baptiste, Makhalanyane, Thulani P., Jansson, Janet K., Hopkins, David W., Aspray, Thomas J., Seely, Mary, Trindade, Marla I., Cowan, Don A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5041089/
https://www.ncbi.nlm.nih.gov/pubmed/27680878
http://dx.doi.org/10.1038/srep34434
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author Armstrong, Alacia
Valverde, Angel
Ramond, Jean-Baptiste
Makhalanyane, Thulani P.
Jansson, Janet K.
Hopkins, David W.
Aspray, Thomas J.
Seely, Mary
Trindade, Marla I.
Cowan, Don A.
author_facet Armstrong, Alacia
Valverde, Angel
Ramond, Jean-Baptiste
Makhalanyane, Thulani P.
Jansson, Janet K.
Hopkins, David W.
Aspray, Thomas J.
Seely, Mary
Trindade, Marla I.
Cowan, Don A.
author_sort Armstrong, Alacia
collection PubMed
description 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 CO(2) 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.
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spelling pubmed-50410892016-09-30 Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input Armstrong, Alacia Valverde, Angel Ramond, Jean-Baptiste Makhalanyane, Thulani P. Jansson, Janet K. Hopkins, David W. Aspray, Thomas J. Seely, Mary Trindade, Marla I. Cowan, Don A. Sci Rep Article 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 CO(2) 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. Nature Publishing Group 2016-09-29 /pmc/articles/PMC5041089/ /pubmed/27680878 http://dx.doi.org/10.1038/srep34434 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Armstrong, Alacia
Valverde, Angel
Ramond, Jean-Baptiste
Makhalanyane, Thulani P.
Jansson, Janet K.
Hopkins, David W.
Aspray, Thomas J.
Seely, Mary
Trindade, Marla I.
Cowan, Don A.
Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
title Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
title_full Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
title_fullStr Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
title_full_unstemmed Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
title_short Temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
title_sort temporal dynamics of hot desert microbial communities reveal structural and functional responses to water input
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5041089/
https://www.ncbi.nlm.nih.gov/pubmed/27680878
http://dx.doi.org/10.1038/srep34434
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