Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient

Abstract Heterotrophic bacteria are thought to be phosphorus-rich organisms with relatively homeostatic stoichiometry, but the elemental composition of natural bacterial communities has rarely been assessed. Here we tested whether bacterial stoichiometry changes with the trophic status of lakes by a...

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Autores principales:	Birgit Stenzel, Carina Rofner, Maria Teresa Pérez, Ruben Sommaruga
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e4f7b6c1e878407ba6e2912a8295331c
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spelling	oai:doaj.org-article:e4f7b6c1e878407ba6e2912a8295331c2021-12-02T12:32:01ZStoichiometry of natural bacterial assemblages from lakes located across an elevational gradient10.1038/s41598-017-06282-02045-2322https://doaj.org/article/e4f7b6c1e878407ba6e2912a8295331c2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06282-0https://doaj.org/toc/2045-2322Abstract Heterotrophic bacteria are thought to be phosphorus-rich organisms with relatively homeostatic stoichiometry, but the elemental composition of natural bacterial communities has rarely been assessed. Here we tested whether bacterial stoichiometry changes with the trophic status of lakes by assessing the elemental composition of the bacterial-dominated (hereafter microbial) fraction together with that of the dissolved and seston fractions in 11 lakes situated along an elevational gradient. The stoichiometry of these three size-fractions was analyzed during the thermal stratification and mixing periods in composite water samples and in the water layer of the deep chlorophyll-a maximum. In addition, we analyzed the relative abundance of the most common bacterial groups in the lakes. Our results show that the microbial fraction was always enriched in phosphorus compared to the dissolved fraction, irrespectively of the lake trophic status. Further, they indicate that the elemental composition of bacteria in mountain lakes is at least seasonally very dynamic, resulting not only from changes in the nutrient ratios of the resource itself, but probably from changes in the composition of the dominant bacterial taxa too, though at the taxonomic level analyzed, we did not find evidence for this.Birgit StenzelCarina RofnerMaria Teresa PérezRuben SommarugaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Birgit Stenzel Carina Rofner Maria Teresa Pérez Ruben Sommaruga Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient
description	Abstract Heterotrophic bacteria are thought to be phosphorus-rich organisms with relatively homeostatic stoichiometry, but the elemental composition of natural bacterial communities has rarely been assessed. Here we tested whether bacterial stoichiometry changes with the trophic status of lakes by assessing the elemental composition of the bacterial-dominated (hereafter microbial) fraction together with that of the dissolved and seston fractions in 11 lakes situated along an elevational gradient. The stoichiometry of these three size-fractions was analyzed during the thermal stratification and mixing periods in composite water samples and in the water layer of the deep chlorophyll-a maximum. In addition, we analyzed the relative abundance of the most common bacterial groups in the lakes. Our results show that the microbial fraction was always enriched in phosphorus compared to the dissolved fraction, irrespectively of the lake trophic status. Further, they indicate that the elemental composition of bacteria in mountain lakes is at least seasonally very dynamic, resulting not only from changes in the nutrient ratios of the resource itself, but probably from changes in the composition of the dominant bacterial taxa too, though at the taxonomic level analyzed, we did not find evidence for this.
format	article
author	Birgit Stenzel Carina Rofner Maria Teresa Pérez Ruben Sommaruga
author_facet	Birgit Stenzel Carina Rofner Maria Teresa Pérez Ruben Sommaruga
author_sort	Birgit Stenzel
title	Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient
title_short	Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient
title_full	Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient
title_fullStr	Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient
title_full_unstemmed	Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient
title_sort	stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e4f7b6c1e878407ba6e2912a8295331c
work_keys_str_mv	AT birgitstenzel stoichiometryofnaturalbacterialassemblagesfromlakeslocatedacrossanelevationalgradient AT carinarofner stoichiometryofnaturalbacterialassemblagesfromlakeslocatedacrossanelevationalgradient AT mariateresaperez stoichiometryofnaturalbacterialassemblagesfromlakeslocatedacrossanelevationalgradient AT rubensommaruga stoichiometryofnaturalbacterialassemblagesfromlakeslocatedacrossanelevationalgradient
_version_	1718394250185408512

Stoichiometry of natural bacterial assemblages from lakes located across an elevational gradient

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