María Ángeles Lezcano

Microbialite communities as high‐resolution archives of environmental changes: A 12,000‐yr record from Turquesa Lake, Central Andes

Patricio Guillermo Villafañe, María Ángeles Lezcano, Micaela Della Vedova, Laura Sánchez‐García et autres

ABSTRACT Turquesa Lake (Central Andes) has experienced significant desiccation over the last few centuries, affecting its physico‐chemical conditions. Despite this, its stratigraphic record reveals three microbialitic levels (MI, MII, and MIII) that have colonized the lake's coast for the last ~ 12,000 …

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Author Correction: A roadmap for equitable reuse of public microbiome data

Laura A. Hug, Roland Hatzenpichler, Cristina Moraru, André Soares et autres

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A roadmap for equitable reuse of public microbiome data

Laura A. Hug, Roland Hatzenpichler, Cristina Moraru, André Soares et autres

Science benefits from rapid open data sharing, but current guidelines for data reuse were established two decades ago, when databases were several million times smaller than they are today. These guidelines are largely unfamiliar to the scientific community, and, owing to the …

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Temperature-Sensitive Lipids Reveal Intraspecific Diversity in Bacteria Isolated from an Ancient Antarctic Microbial Mat

María Ángeles Lezcano, Daniel G. Carrizo, M.A. Lominchar, Laura Sánchez‐García et autres

Ancient Antarctic microbial mats harbour viable bacteria that have been exposed to extreme cold and arid conditions for hundreds of years. To delve into the molecular mechanisms underlaying their survival, we isolated 12 bacterial strains from a 1,000-year-old desiccated microbial mat from …

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Higher Microbial Biomass Accumulation on El Médano 464 Meteorite Compared with Adjacent Soils in the Atacama Desert

G. Pinto, María Ángeles Lezcano, Laura Sánchez‐García, Rodrigo Martínez et autres

Chondritic meteorites can be appropriate substrates for the colonization of terrestrial microorganisms. However, determining whether organic compounds are intrinsic to the meteorite or come from external (terrestrial) contamination is still controversial. This research explores the molecular distribution and carbon isotopic composition of …

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Microbial biogeography along a 2578 km transect on the East Antarctic Plateau

Vı́ctor Parro, María Ángeles Lezcano, Mercedes Moreno‐Paz, Alfonso F. Dávila et autres

Microorganisms are present in snow/ice of the Antarctic Plateau, but their biogeography and metabolic state under extreme local conditions are poorly understood. Here, we show the diversity and distribution of microorganisms in air (1.5 m height) and snow/ice down to 4 m …

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Hyperexpansion of genetic diversity and metabolic capacity of extremophilic bacteria and archaea in ancient Andean lake sediments

María Ángeles Lezcano, Till L. V. Bornemann, Laura Sánchez‐García, Daniel G. Carrizo et autres

Abstract Background The Andean Altiplano hosts a repertoire of high-altitude lakes with harsh conditions for life. These lakes are undergoing a process of desiccation caused by the current climate, leaving terraces exposed to extreme atmospheric conditions and serving as analogs to Martian …

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Hyperexpansion of genetic diversity and metabolic capacity of extremophilic bacteria and archaea in ancient Andean Lake sediments

María Ángeles Lezcano, Till L. V. Bornemann, Laura Sánchez‐García, Daniel G. Carrizo et autres

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Microbial Biomarkers Reveal El Médano 464 Carbonaceous Chondrite as a Preferred Microhabitat in the Atacama Desert

G. Pinto, María Ángeles Lezcano, Laura Sánchez‐García, Rodrigo Martínez et autres

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Changes in membrane fatty acids of a halo-psychrophile exposed to magnesium perchlorate and low temperatures: Implications for Mars habitability

L. García-Descalzo, María Ángeles Lezcano, Daniel G. Carrizo, Alberto González Fairén

The presence of perchlorate salts in aqueous solutions bears two opposite effects on habitability. On the one hand, perchlorate salts trigger a decrease in the freezing point of the aqueous solutions, resulting in stable aqueous solutions at subzero temperatures, thereby widening the …

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Assessing siliceous sinter matrices for long-term preservation of lipid biomarkers in opaline sinter deposits analogous to Mars in El Tatio (Chile)

Laura Sánchez‐García, María Ángeles Lezcano, Daniel G. Carrizo, Rita Severino et autres

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Lipid Profiles From Fresh Biofilms Along a Temperature Gradient on a Hydrothermal Stream at El Tatio (Chilean Andes), as a Proxy for the Interpretation of Past and Present Biomarkers Beyond Earth

Valentine Megevand, Daniel G. Carrizo, María Ángeles Lezcano, Mercedes Moreno‐Paz et autres

Hydrothermal systems and their deposits are primary targets in the search for fossil evidence of life beyond Earth. However, to learn how to decode fossil biomarker records in ancient hydrothermal deposits, we must first be able to interpret unambiguously modern biosignatures, their …

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