Assessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan

The microbial communities inhabiting mud volcanoes have received more attention due to their noteworthy impact on the global methane cycle. However, the impact of temporal effects of volcanic eruptions on the microbial community’s diversity and functions remain poorly characterized. This study aimed...

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Autores principales: Ho-Chuan Hsu, Jung-Sheng Chen, Viji Nagarajan, Bashir Hussain, Shih-Wei Huang, Jagat Rathod, Bing-Mu Hsu
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Publicado: MDPI AG 2021
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spelling oai:doaj.org-article:8e98fa0ea25c4db8b28ecf8f323555aa2021-11-25T18:25:03ZAssessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan10.3390/microorganisms91123152076-2607https://doaj.org/article/8e98fa0ea25c4db8b28ecf8f323555aa2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-2607/9/11/2315https://doaj.org/toc/2076-2607The microbial communities inhabiting mud volcanoes have received more attention due to their noteworthy impact on the global methane cycle. However, the impact of temporal effects of volcanic eruptions on the microbial community’s diversity and functions remain poorly characterized. This study aimed to underpin the temporal variations in the bacterial community’s diversity and PICRUSt-predicted functional profile changes of mud volcanic sites located in southern Taiwan using 16S rRNA gene sequencing. The physicochemical analysis showed that the samples were slightly alkaline and had elevated levels of Na<sup>+</sup>, Cl<sup>−</sup>, and SO<sub>4</sub><sup>2−</sup>. Comparatively, the major and trace element contents were distinctly higher, and tended to be increased in the long-period samples. Alpha diversity metrics revealed that the bacterial diversity and abundance were lesser in the initial period, but increased over time. Instead, day 96 and 418 samples showed reduced bacterial abundance, which may have been due to the dry spell that occurred before each sampling. The initial-period samples were significantly abundant in haloalkaliphilic marine-inhabiting, hydrocarbon-degrading bacterial genera such as <i>Marinobacter</i>, <i>Halomonas</i>, <i>Marinobacterium,</i> and <i>Oceanimonas</i>. Sulfur-reducing bacteria such as <i>Desulfurispirillum</i> and <i>Desulfofarcimen</i> were found dominant in the mid-period samples, whereas the methanogenic archaeon <i>Methanosarcina</i> was abundant in the long-period samples. Unfortunately, heavy precipitation encountered during the mid and long periods may have polluted the volcanic site with animal pathogens such as <i>Desulfofarcimen</i> and <i>Erysipelothrix</i>. The functional prediction results showed that lipid biosynthesis and ubiquinol pathways were significantly abundant in the initial days, and the super pathway of glucose and xylose degradation was rich in the long-period samples. The findings of this study highlighted that the temporal effects of a mud volcanic eruption highly influenced the bacterial diversity, abundance, and functional profiles in our study site.Ho-Chuan HsuJung-Sheng ChenViji NagarajanBashir HussainShih-Wei HuangJagat RathodBing-Mu HsuMDPI AGarticlemud volcanosulfur-reducing bacteriamethanogenshydrocarbon degraders16S rRNA gene sequencingPICRUSt2Biology (General)QH301-705.5ENMicroorganisms, Vol 9, Iss 2315, p 2315 (2021)
institution DOAJ
collection DOAJ
language EN
topic mud volcano
sulfur-reducing bacteria
methanogens
hydrocarbon degraders
16S rRNA gene sequencing
PICRUSt2
Biology (General)
QH301-705.5
spellingShingle mud volcano
sulfur-reducing bacteria
methanogens
hydrocarbon degraders
16S rRNA gene sequencing
PICRUSt2
Biology (General)
QH301-705.5
Ho-Chuan Hsu
Jung-Sheng Chen
Viji Nagarajan
Bashir Hussain
Shih-Wei Huang
Jagat Rathod
Bing-Mu Hsu
Assessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan
description The microbial communities inhabiting mud volcanoes have received more attention due to their noteworthy impact on the global methane cycle. However, the impact of temporal effects of volcanic eruptions on the microbial community’s diversity and functions remain poorly characterized. This study aimed to underpin the temporal variations in the bacterial community’s diversity and PICRUSt-predicted functional profile changes of mud volcanic sites located in southern Taiwan using 16S rRNA gene sequencing. The physicochemical analysis showed that the samples were slightly alkaline and had elevated levels of Na<sup>+</sup>, Cl<sup>−</sup>, and SO<sub>4</sub><sup>2−</sup>. Comparatively, the major and trace element contents were distinctly higher, and tended to be increased in the long-period samples. Alpha diversity metrics revealed that the bacterial diversity and abundance were lesser in the initial period, but increased over time. Instead, day 96 and 418 samples showed reduced bacterial abundance, which may have been due to the dry spell that occurred before each sampling. The initial-period samples were significantly abundant in haloalkaliphilic marine-inhabiting, hydrocarbon-degrading bacterial genera such as <i>Marinobacter</i>, <i>Halomonas</i>, <i>Marinobacterium,</i> and <i>Oceanimonas</i>. Sulfur-reducing bacteria such as <i>Desulfurispirillum</i> and <i>Desulfofarcimen</i> were found dominant in the mid-period samples, whereas the methanogenic archaeon <i>Methanosarcina</i> was abundant in the long-period samples. Unfortunately, heavy precipitation encountered during the mid and long periods may have polluted the volcanic site with animal pathogens such as <i>Desulfofarcimen</i> and <i>Erysipelothrix</i>. The functional prediction results showed that lipid biosynthesis and ubiquinol pathways were significantly abundant in the initial days, and the super pathway of glucose and xylose degradation was rich in the long-period samples. The findings of this study highlighted that the temporal effects of a mud volcanic eruption highly influenced the bacterial diversity, abundance, and functional profiles in our study site.
format article
author Ho-Chuan Hsu
Jung-Sheng Chen
Viji Nagarajan
Bashir Hussain
Shih-Wei Huang
Jagat Rathod
Bing-Mu Hsu
author_facet Ho-Chuan Hsu
Jung-Sheng Chen
Viji Nagarajan
Bashir Hussain
Shih-Wei Huang
Jagat Rathod
Bing-Mu Hsu
author_sort Ho-Chuan Hsu
title Assessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan
title_short Assessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan
title_full Assessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan
title_fullStr Assessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan
title_full_unstemmed Assessment of Temporal Effects of a Mud Volcanic Eruption on the Bacterial Community and Their Predicted Metabolic Functions in the Mud Volcanic Sites of Niaosong, Southern Taiwan
title_sort assessment of temporal effects of a mud volcanic eruption on the bacterial community and their predicted metabolic functions in the mud volcanic sites of niaosong, southern taiwan
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/8e98fa0ea25c4db8b28ecf8f323555aa
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