Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?

It is widely accepted that biodiversity is lower in more extreme environments. In this study, we sought to determine whether this trend, well documented for macroorganisms, also holds at the microbial level for bacteria. We used denaturing gradient gel electrophoresis (DGGE) with phylum-specific pri...

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Autores principales:	Jianjun Wang, Dongmei Yang, Yong Zhang, Ji Shen, Christopher van der Gast, Martin W Hahn, Qinglong Wu
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eff2032fa24b4bd78e19e56a4cda6e89
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spelling	oai:doaj.org-article:eff2032fa24b4bd78e19e56a4cda6e892021-11-18T07:33:55ZDo patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?1932-620310.1371/journal.pone.0027597https://doaj.org/article/eff2032fa24b4bd78e19e56a4cda6e892011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22125616/?tool=EBIhttps://doaj.org/toc/1932-6203It is widely accepted that biodiversity is lower in more extreme environments. In this study, we sought to determine whether this trend, well documented for macroorganisms, also holds at the microbial level for bacteria. We used denaturing gradient gel electrophoresis (DGGE) with phylum-specific primers to quantify the taxon richness (i.e., the DGGE band numbers) of the bacterioplankton communities of 32 pristine Tibetan lakes that represent a broad salinity range (freshwater to hypersaline). For the lakes investigated, salinity was found to be the environmental variable with the strongest influence on the bacterial community composition. We found that the bacterial taxon richness in freshwater habitats increased with increasing salinity up to a value of 1‰. In saline systems (systems with >1‰ salinity), the expected decrease of taxon richness along a gradient of further increasing salinity was not observed. These patterns were consistently observed for two sets of samples taken in two different years. A comparison of 16S rRNA gene clone libraries revealed that the bacterial community of the lake with the highest salinity was characterized by a higher recent accelerated diversification than the community of a freshwater lake, whereas the phylogenetic diversity in the hypersaline lake was lower than that in the freshwater lake. These results suggest that different evolutionary forces may act on bacterial populations in freshwater and hypersaline lakes on the Tibetan Plateau, potentially resulting in different community structures and diversity patterns.Jianjun WangDongmei YangYong ZhangJi ShenChristopher van der GastMartin W HahnQinglong WuPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 11, p e27597 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jianjun Wang Dongmei Yang Yong Zhang Ji Shen Christopher van der Gast Martin W Hahn Qinglong Wu Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?
description	It is widely accepted that biodiversity is lower in more extreme environments. In this study, we sought to determine whether this trend, well documented for macroorganisms, also holds at the microbial level for bacteria. We used denaturing gradient gel electrophoresis (DGGE) with phylum-specific primers to quantify the taxon richness (i.e., the DGGE band numbers) of the bacterioplankton communities of 32 pristine Tibetan lakes that represent a broad salinity range (freshwater to hypersaline). For the lakes investigated, salinity was found to be the environmental variable with the strongest influence on the bacterial community composition. We found that the bacterial taxon richness in freshwater habitats increased with increasing salinity up to a value of 1‰. In saline systems (systems with >1‰ salinity), the expected decrease of taxon richness along a gradient of further increasing salinity was not observed. These patterns were consistently observed for two sets of samples taken in two different years. A comparison of 16S rRNA gene clone libraries revealed that the bacterial community of the lake with the highest salinity was characterized by a higher recent accelerated diversification than the community of a freshwater lake, whereas the phylogenetic diversity in the hypersaline lake was lower than that in the freshwater lake. These results suggest that different evolutionary forces may act on bacterial populations in freshwater and hypersaline lakes on the Tibetan Plateau, potentially resulting in different community structures and diversity patterns.
format	article
author	Jianjun Wang Dongmei Yang Yong Zhang Ji Shen Christopher van der Gast Martin W Hahn Qinglong Wu
author_facet	Jianjun Wang Dongmei Yang Yong Zhang Ji Shen Christopher van der Gast Martin W Hahn Qinglong Wu
author_sort	Jianjun Wang
title	Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?
title_short	Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?
title_full	Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?
title_fullStr	Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?
title_full_unstemmed	Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?
title_sort	do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/eff2032fa24b4bd78e19e56a4cda6e89
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Do patterns of bacterial diversity along salinity gradients differ from those observed for macroorganisms?

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