Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass

Enceladus is a potential target for future astrobiological missions. NASA’s Cassini spacecraft demonstrated that the Saturnian moon harbors a salty ocean beneath its icy crust and the existence and analysis of the plume suggest water–rock reactions, consistent with the possible presence of hydrother...

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Autores principales:	Laura I. Tenelanda-Osorio, Juan L. Parra, Pablo Cuartas-Restrepo, Jorge I. Zuluaga
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Enceladus methanogens hydrothermal vents fundamental niche Bioclim algorithm Monod growth model Science Q
Acceso en línea:	https://doaj.org/article/47b13e2947fc4c0b9a000fe989f1c67d
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spelling	oai:doaj.org-article:47b13e2947fc4c0b9a000fe989f1c67d2021-11-25T18:10:58ZEnceladus as a Potential Niche for Methanogens and Estimation of Its Biomass10.3390/life111111822075-1729https://doaj.org/article/47b13e2947fc4c0b9a000fe989f1c67d2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-1729/11/11/1182https://doaj.org/toc/2075-1729Enceladus is a potential target for future astrobiological missions. NASA’s Cassini spacecraft demonstrated that the Saturnian moon harbors a salty ocean beneath its icy crust and the existence and analysis of the plume suggest water–rock reactions, consistent with the possible presence of hydrothermal vents. Particularly, the plume analysis revealed the presence of molecular hydrogen, which may be used as an energy source by microorganisms ( e.g., methanogens). This could support the possibility that populations of methanogens could establish in such environments if they exist on Enceladus. We took a macroscale approximation using ecological niche modeling to evaluate whether conditions suitable for methanogenic archaea on Earth are expected in Enceladus. In addition, we employed a new approach for computing the biomass using the Monod growth model. The response curves for the environmental variables performed well statistically, indicating that simple correlative models may be used to approximate large-scale distributions of these genera on Earth. We found that the potential hydrothermal conditions on Enceladus fit within the macroscale conditions identified as suitable for methanogens on Earth, and estimated a concentration of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>10</mn></msup></semantics></math></inline-formula>–<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>11</mn></msup></semantics></math></inline-formula> cells/cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>3</mn></msup></semantics></math></inline-formula>.Laura I. Tenelanda-OsorioJuan L. ParraPablo Cuartas-RestrepoJorge I. ZuluagaMDPI AGarticleEnceladusmethanogenshydrothermal ventsfundamental nicheBioclim algorithmMonod growth modelScienceQENLife, Vol 11, Iss 1182, p 1182 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Enceladus methanogens hydrothermal vents fundamental niche Bioclim algorithm Monod growth model Science Q
spellingShingle	Enceladus methanogens hydrothermal vents fundamental niche Bioclim algorithm Monod growth model Science Q Laura I. Tenelanda-Osorio Juan L. Parra Pablo Cuartas-Restrepo Jorge I. Zuluaga Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass
description	Enceladus is a potential target for future astrobiological missions. NASA’s Cassini spacecraft demonstrated that the Saturnian moon harbors a salty ocean beneath its icy crust and the existence and analysis of the plume suggest water–rock reactions, consistent with the possible presence of hydrothermal vents. Particularly, the plume analysis revealed the presence of molecular hydrogen, which may be used as an energy source by microorganisms ( e.g., methanogens). This could support the possibility that populations of methanogens could establish in such environments if they exist on Enceladus. We took a macroscale approximation using ecological niche modeling to evaluate whether conditions suitable for methanogenic archaea on Earth are expected in Enceladus. In addition, we employed a new approach for computing the biomass using the Monod growth model. The response curves for the environmental variables performed well statistically, indicating that simple correlative models may be used to approximate large-scale distributions of these genera on Earth. We found that the potential hydrothermal conditions on Enceladus fit within the macroscale conditions identified as suitable for methanogens on Earth, and estimated a concentration of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>10</mn></msup></semantics></math></inline-formula>–<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mn>10</mn><mn>11</mn></msup></semantics></math></inline-formula> cells/cm<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mn>3</mn></msup></semantics></math></inline-formula>.
format	article
author	Laura I. Tenelanda-Osorio Juan L. Parra Pablo Cuartas-Restrepo Jorge I. Zuluaga
author_facet	Laura I. Tenelanda-Osorio Juan L. Parra Pablo Cuartas-Restrepo Jorge I. Zuluaga
author_sort	Laura I. Tenelanda-Osorio
title	Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass
title_short	Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass
title_full	Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass
title_fullStr	Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass
title_full_unstemmed	Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass
title_sort	enceladus as a potential niche for methanogens and estimation of its biomass
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/47b13e2947fc4c0b9a000fe989f1c67d
work_keys_str_mv	AT lauraitenelandaosorio enceladusasapotentialnicheformethanogensandestimationofitsbiomass AT juanlparra enceladusasapotentialnicheformethanogensandestimationofitsbiomass AT pablocuartasrestrepo enceladusasapotentialnicheformethanogensandestimationofitsbiomass AT jorgeizuluaga enceladusasapotentialnicheformethanogensandestimationofitsbiomass
_version_	1718411496118026240

Enceladus as a Potential Niche for Methanogens and Estimation of Its Biomass

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