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Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves

Methane production by methanogens in mangrove sediments is known to contribute significantly to global warming, but studies on the shift of methanogenic community in response to anthropogenic contaminations were still limited. In this study, the effect of anthropogenic activities in the mangrove sed...

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Autores principales: Jing, Hongmei, Cheung, Shunyan, Zhou, Zhi, Wu, Chen, Nagarajan, Sanjay, Liu, Hongbin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5042419/
https://www.ncbi.nlm.nih.gov/pubmed/27684479
http://dx.doi.org/10.1371/journal.pone.0161065
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author Jing, Hongmei
Cheung, Shunyan
Zhou, Zhi
Wu, Chen
Nagarajan, Sanjay
Liu, Hongbin
author_facet Jing, Hongmei
Cheung, Shunyan
Zhou, Zhi
Wu, Chen
Nagarajan, Sanjay
Liu, Hongbin
author_sort Jing, Hongmei
collection PubMed
description Methane production by methanogens in mangrove sediments is known to contribute significantly to global warming, but studies on the shift of methanogenic community in response to anthropogenic contaminations were still limited. In this study, the effect of anthropogenic activities in the mangrove sediments along the north and south coastlines of Singapore were investigated by pyrosequencing of the mcrA gene. Our results showed that hydrogenotrophic, acetoclastic and methylotrophic methanogens coexist in the sediments. The predominance of the methylotrophic Methanosarcinales reflects the potential for high methane production as well as the possible availability of low acetate and high methylated C-1 compounds as substrates. A decline in the number of acetoclastic/methylotrophic methanogens in favor of hydrogenotrophic methanogens was observed along a vertical profile in Sungei Changi, which was contaminated by heavy metals. The diversity of methanogens in the various contaminated stations was significantly different from that in a pristine St. John’s Island. The spatial variation in the methanogenic communities among the different stations was more distinct than those along the vertical profiles at each station. We suggest that the overall heterogeneity of the methanogenic communities residing in the tropical mangrove sediments might be due to the accumulated effects of temperature and concentrations of nitrate, cobalt, and nickel.
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spelling pubmed-50424192016-10-27 Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves Jing, Hongmei Cheung, Shunyan Zhou, Zhi Wu, Chen Nagarajan, Sanjay Liu, Hongbin PLoS One Research Article Methane production by methanogens in mangrove sediments is known to contribute significantly to global warming, but studies on the shift of methanogenic community in response to anthropogenic contaminations were still limited. In this study, the effect of anthropogenic activities in the mangrove sediments along the north and south coastlines of Singapore were investigated by pyrosequencing of the mcrA gene. Our results showed that hydrogenotrophic, acetoclastic and methylotrophic methanogens coexist in the sediments. The predominance of the methylotrophic Methanosarcinales reflects the potential for high methane production as well as the possible availability of low acetate and high methylated C-1 compounds as substrates. A decline in the number of acetoclastic/methylotrophic methanogens in favor of hydrogenotrophic methanogens was observed along a vertical profile in Sungei Changi, which was contaminated by heavy metals. The diversity of methanogens in the various contaminated stations was significantly different from that in a pristine St. John’s Island. The spatial variation in the methanogenic communities among the different stations was more distinct than those along the vertical profiles at each station. We suggest that the overall heterogeneity of the methanogenic communities residing in the tropical mangrove sediments might be due to the accumulated effects of temperature and concentrations of nitrate, cobalt, and nickel. Public Library of Science 2016-09-29 /pmc/articles/PMC5042419/ /pubmed/27684479 http://dx.doi.org/10.1371/journal.pone.0161065 Text en © 2016 Jing et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Jing, Hongmei
Cheung, Shunyan
Zhou, Zhi
Wu, Chen
Nagarajan, Sanjay
Liu, Hongbin
Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves
title Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves
title_full Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves
title_fullStr Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves
title_full_unstemmed Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves
title_short Spatial Variations of the Methanogenic Communities in the Sediments of Tropical Mangroves
title_sort spatial variations of the methanogenic communities in the sediments of tropical mangroves
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5042419/
https://www.ncbi.nlm.nih.gov/pubmed/27684479
http://dx.doi.org/10.1371/journal.pone.0161065
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