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Low recovery of bacterial community after an extreme salinization-desalinization cycle
BACKGROUND: Understanding the recovery of bacterial communities after extreme environmental disturbances offers key opportunities to investigate ecosystem resilience. However, it is not yet clear whether bacterial communities can rebound to their pre-disturbance levels. To shed light on this issue,...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6251166/ https://www.ncbi.nlm.nih.gov/pubmed/30470189 http://dx.doi.org/10.1186/s12866-018-1333-2 |
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author | Hu, Yang Bai, Chengrong Cai, Jian Shao, Keqiang Tang, Xiangming Gao, Guang |
author_facet | Hu, Yang Bai, Chengrong Cai, Jian Shao, Keqiang Tang, Xiangming Gao, Guang |
author_sort | Hu, Yang |
collection | PubMed |
description | BACKGROUND: Understanding the recovery of bacterial communities after extreme environmental disturbances offers key opportunities to investigate ecosystem resilience. However, it is not yet clear whether bacterial communities can rebound to their pre-disturbance levels. To shed light on this issue, we tracked the responses of bacterial communities during an extreme salinization-desalinization cycle. RESULTS: Our results showed that salinization-up process induced an ecological succession, shifting from a community dominated by Betaproteobacteria to Gammaproteobacteria. Within the desalinization-down process, taxon-specific recovery trajectories varied profoundly, with only Gammaproteobacteria returning to their initial levels, of which Alphaproteobacteria was the most prominent member. The α-diversity indices gradually increased at oligosaline environment (0.03‰ to 3‰) and subsequently decreased profoundly at hypersaline condition (10‰ to 90‰). However, the indices did not return to pre-disturbance level along the previous trajectory observed during the desalinization. Approximately half of the original OTUs were not detected during desalinization, suggesting that the seed bank may be damaged by the hypersaline environment. Moreover, Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) implied that the osmosensors’ capacity of bacterial communities was also impaired by the hypersaline condition. CONCLUSIONS: These results suggested that the bacterial communities showed a low recovery after the extreme salinization-desalinization cycle. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12866-018-1333-2) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-6251166 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-62511662018-11-26 Low recovery of bacterial community after an extreme salinization-desalinization cycle Hu, Yang Bai, Chengrong Cai, Jian Shao, Keqiang Tang, Xiangming Gao, Guang BMC Microbiol Research Article BACKGROUND: Understanding the recovery of bacterial communities after extreme environmental disturbances offers key opportunities to investigate ecosystem resilience. However, it is not yet clear whether bacterial communities can rebound to their pre-disturbance levels. To shed light on this issue, we tracked the responses of bacterial communities during an extreme salinization-desalinization cycle. RESULTS: Our results showed that salinization-up process induced an ecological succession, shifting from a community dominated by Betaproteobacteria to Gammaproteobacteria. Within the desalinization-down process, taxon-specific recovery trajectories varied profoundly, with only Gammaproteobacteria returning to their initial levels, of which Alphaproteobacteria was the most prominent member. The α-diversity indices gradually increased at oligosaline environment (0.03‰ to 3‰) and subsequently decreased profoundly at hypersaline condition (10‰ to 90‰). However, the indices did not return to pre-disturbance level along the previous trajectory observed during the desalinization. Approximately half of the original OTUs were not detected during desalinization, suggesting that the seed bank may be damaged by the hypersaline environment. Moreover, Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) implied that the osmosensors’ capacity of bacterial communities was also impaired by the hypersaline condition. CONCLUSIONS: These results suggested that the bacterial communities showed a low recovery after the extreme salinization-desalinization cycle. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12866-018-1333-2) contains supplementary material, which is available to authorized users. BioMed Central 2018-11-23 /pmc/articles/PMC6251166/ /pubmed/30470189 http://dx.doi.org/10.1186/s12866-018-1333-2 Text en © The Author(s). 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Article Hu, Yang Bai, Chengrong Cai, Jian Shao, Keqiang Tang, Xiangming Gao, Guang Low recovery of bacterial community after an extreme salinization-desalinization cycle |
title | Low recovery of bacterial community after an extreme salinization-desalinization cycle |
title_full | Low recovery of bacterial community after an extreme salinization-desalinization cycle |
title_fullStr | Low recovery of bacterial community after an extreme salinization-desalinization cycle |
title_full_unstemmed | Low recovery of bacterial community after an extreme salinization-desalinization cycle |
title_short | Low recovery of bacterial community after an extreme salinization-desalinization cycle |
title_sort | low recovery of bacterial community after an extreme salinization-desalinization cycle |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6251166/ https://www.ncbi.nlm.nih.gov/pubmed/30470189 http://dx.doi.org/10.1186/s12866-018-1333-2 |
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