Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts

Heterocystous cyanobacteria of biocrusts are key players for biological fixation in drylands, where nitrogen is only second to water as a limiting resource. We studied the niche partitioning among the three most common biocrust heterocystous cyanobacteria sts using enrichment cultivation and the det...

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Autores: Giraldo-Silva, Ana, Fernandes, Vanessa Moreira Camara, Bethany, Julie, García-Pichel, Ferran
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Recursos:Universidad Pública de Navarra
Repositorio:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/56404
Acesso em linha:https://hdl.handle.net/2454/56404
Access Level:acceso abierto
Palavra-chave:Biological soil crust
Drylands
Niche partitioning
Nitrogen fixing cyanobacteria
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spelling Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crustsGiraldo-Silva, AnaFernandes, Vanessa Moreira CamaraBethany, Julie García-Pichel, FerranBiological soil crustDrylandsNiche partitioningNitrogen fixing cyanobacteriaHeterocystous cyanobacteria of biocrusts are key players for biological fixation in drylands, where nitrogen is only second to water as a limiting resource. We studied the niche partitioning among the three most common biocrust heterocystous cyanobacteria sts using enrichment cultivation and the determination of growth responses to temperature in 30 representative isolates. Isolates of Scytonema spp. were most thermotolerant, typically growing up to 40 °C, whereas only those of Tolypothrix spp. grew at 4 °C. Nostoc spp. strains responded well at intermediate temperatures. We could trace the heat sensitivity in Nostoc spp. and Tolypothrix spp. to N2-fixation itself, because the upper temperature for growth increased under nitrogen replete conditions. This may involve an inability to develop heterocysts (specialized N2-fixing cells) at high temperatures. We then used a meta-analysis of biocrust molecular surveys spanning four continents to test the relevance of this apparent niche partitioning in nature. Indeed, the geographic distribution of the three types was clearly constrained by the mean local temperature, particularly during the growth season. This allows us to predict a potential shift in dominance in many locales as a result of global warming, to the benefit of Scytonema spp. populations.This research was partly funded by the Barret-Honors College at Arizona State University and by the Center for Bio-mediated & Bio-inspired Geotechnics (CBBG) at Arizona State University.MDPICienciasZientziak2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2454/56404reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/564042026-06-17T12:41:47Z
dc.title.none.fl_str_mv Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
title Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
spellingShingle Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
Giraldo-Silva, Ana
Biological soil crust
Drylands
Niche partitioning
Nitrogen fixing cyanobacteria
title_short Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
title_full Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
title_fullStr Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
title_full_unstemmed Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
title_sort Niche partitioning with temperature among heterocystous cyanobacteria (Scytonema spp., Nostoc spp., and Tolypothrix spp.) from biological soil crusts
dc.creator.none.fl_str_mv Giraldo-Silva, Ana
Fernandes, Vanessa Moreira Camara
Bethany, Julie
García-Pichel, Ferran
author Giraldo-Silva, Ana
author_facet Giraldo-Silva, Ana
Fernandes, Vanessa Moreira Camara
Bethany, Julie
García-Pichel, Ferran
author_role author
author2 Fernandes, Vanessa Moreira Camara
Bethany, Julie
García-Pichel, Ferran
author2_role author
author
author
dc.contributor.none.fl_str_mv Ciencias
Zientziak
dc.subject.none.fl_str_mv Biological soil crust
Drylands
Niche partitioning
Nitrogen fixing cyanobacteria
topic Biological soil crust
Drylands
Niche partitioning
Nitrogen fixing cyanobacteria
description Heterocystous cyanobacteria of biocrusts are key players for biological fixation in drylands, where nitrogen is only second to water as a limiting resource. We studied the niche partitioning among the three most common biocrust heterocystous cyanobacteria sts using enrichment cultivation and the determination of growth responses to temperature in 30 representative isolates. Isolates of Scytonema spp. were most thermotolerant, typically growing up to 40 °C, whereas only those of Tolypothrix spp. grew at 4 °C. Nostoc spp. strains responded well at intermediate temperatures. We could trace the heat sensitivity in Nostoc spp. and Tolypothrix spp. to N2-fixation itself, because the upper temperature for growth increased under nitrogen replete conditions. This may involve an inability to develop heterocysts (specialized N2-fixing cells) at high temperatures. We then used a meta-analysis of biocrust molecular surveys spanning four continents to test the relevance of this apparent niche partitioning in nature. Indeed, the geographic distribution of the three types was clearly constrained by the mean local temperature, particularly during the growth season. This allows us to predict a potential shift in dominance in many locales as a result of global warming, to the benefit of Scytonema spp. populations.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/56404
url https://hdl.handle.net/2454/56404
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv https://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
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