In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert

The Atacama Desert of northern Chile is one of the driest regions on Earth, with areas that exclude plants and where soils have extremely low microbial biomass. However, in the driest parts of the desert there are microorganisms that colonize the interior of halite nodules in fossil continental evap...

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Detalhes bibliográficos
Autores: Dávila, Alfonso F., Hawes, Ian, Araya, Jonathan G., Gelsinger, Diego R., DiRuggiero, Jocelyne, Ascaso, Carmen, Osano, Anne, Wierzchos, Jacek
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/127399
Acesso em linha:http://hdl.handle.net/10261/127399
Access Level:acceso abierto
Palavra-chave:Atacama
Halite
Deliquescence
Metabolism
Endoliths
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spelling In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama DesertDávila, Alfonso F.Hawes, IanAraya, Jonathan G.Gelsinger, Diego R.DiRuggiero, JocelyneAscaso, CarmenOsano, AnneWierzchos, JacekAtacamaHaliteDeliquescenceMetabolismEndolithsThe Atacama Desert of northern Chile is one of the driest regions on Earth, with areas that exclude plants and where soils have extremely low microbial biomass. However, in the driest parts of the desert there are microorganisms that colonize the interior of halite nodules in fossil continental evaporites, where they are sustained by condensation of atmospheric water triggered by the salt substrate. Using a combination of in situ observations of variable chlorophyll fluorescence and controlled laboratory experiments, we show that this endolithic community is capable of carbon fixation both through oxygenic photosynthesis and potentially ammonia oxidation. We also present evidence that photosynthetic activity is finely tuned to moisture availability and solar insolation and can be sustained for days, and perhaps longer, after a wetting event. This is the first demonstration of in situ active metabolism in the hyperarid core of the Atacama Desert, and it provides the basis for proposing a self-contained, endolithic community that relies exclusively on non-rainfall sources of water. Our results contribute to an increasing body of evidence that even in hyperarid environments active metabolism, adaptation, and growth can occur in highly specialized microhabitats.CA, JDR, AD, and JW are thankful for financial support by CGL2013-42509P grant from MINECO, Spain.Peer reviewedFrontiers in Bioscience PublicationsMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/127399reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2013-42509-Phttp://dx.doi.org/10.3389/fmicb.2015.01035Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1273992026-05-22T06:33:51Z
dc.title.none.fl_str_mv In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
title In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
spellingShingle In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
Dávila, Alfonso F.
Atacama
Halite
Deliquescence
Metabolism
Endoliths
title_short In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
title_full In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
title_fullStr In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
title_full_unstemmed In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
title_sort In situ metabolism in halite endolithic microbial communities of the hyperarid Atacama Desert
dc.creator.none.fl_str_mv Dávila, Alfonso F.
Hawes, Ian
Araya, Jonathan G.
Gelsinger, Diego R.
DiRuggiero, Jocelyne
Ascaso, Carmen
Osano, Anne
Wierzchos, Jacek
author Dávila, Alfonso F.
author_facet Dávila, Alfonso F.
Hawes, Ian
Araya, Jonathan G.
Gelsinger, Diego R.
DiRuggiero, Jocelyne
Ascaso, Carmen
Osano, Anne
Wierzchos, Jacek
author_role author
author2 Hawes, Ian
Araya, Jonathan G.
Gelsinger, Diego R.
DiRuggiero, Jocelyne
Ascaso, Carmen
Osano, Anne
Wierzchos, Jacek
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Atacama
Halite
Deliquescence
Metabolism
Endoliths
topic Atacama
Halite
Deliquescence
Metabolism
Endoliths
description The Atacama Desert of northern Chile is one of the driest regions on Earth, with areas that exclude plants and where soils have extremely low microbial biomass. However, in the driest parts of the desert there are microorganisms that colonize the interior of halite nodules in fossil continental evaporites, where they are sustained by condensation of atmospheric water triggered by the salt substrate. Using a combination of in situ observations of variable chlorophyll fluorescence and controlled laboratory experiments, we show that this endolithic community is capable of carbon fixation both through oxygenic photosynthesis and potentially ammonia oxidation. We also present evidence that photosynthetic activity is finely tuned to moisture availability and solar insolation and can be sustained for days, and perhaps longer, after a wetting event. This is the first demonstration of in situ active metabolism in the hyperarid core of the Atacama Desert, and it provides the basis for proposing a self-contained, endolithic community that relies exclusively on non-rainfall sources of water. Our results contribute to an increasing body of evidence that even in hyperarid environments active metabolism, adaptation, and growth can occur in highly specialized microhabitats.
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/127399
url http://hdl.handle.net/10261/127399
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2013-42509-P
http://dx.doi.org/10.3389/fmicb.2015.01035
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Frontiers in Bioscience Publications
publisher.none.fl_str_mv Frontiers in Bioscience Publications
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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