Modern arsenotrophic microbial mats provide an analogue for life in the anoxic Archean

Visscher, Pieter T.; Gallagher, Kimberley L.; Bouton, Anthony; Farı́as, Marı́a Eugenia; Kurth, Daniel; Sancho-Tomás, María; Philippot, Pascal; Somogyì, Á.; Medjoubi, Kadda; Vennin, Emmanuelle; Bourillot, Raphaël; Walter, Malcolm R.; Burns, Brendan P.; Contreras, Manuel; Dupraz, Christophe

doi:10.1038/s43247-020-00025-2

Cited by 36 publications

(25 citation statements)

References 108 publications

(168 reference statements)

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“…Therefore, further physicochemical and eukaryotic composition analyses should be performed to have a better comprehension of these processes. the mats, (iii) the reduction of S and As compounds through anoxygenic photosynthesis [126], and (iv) the heterogeneous distribution of arsenate and arsenite [102]. All these findings suggest that an As biogeochemical cycle is present in the AMEs, probably similar to the proposed one in ancient microbial ecosystems [127,128].…”

Section: Evaporitic Gypsum-associated Microbial Ecosystemsmentioning

confidence: 71%

“…biomolecules, enhancing even more the growth of photoauto-Turquesa; 4330 masl) and Salar de Llamará, Chile (Puquios de Llamará; 4157 masl) [2,13,59, 90-92] (Figs. 1 and 3, L Laguna (lake), V Volcán (volcano), S Salar (salt flat), F Fumarola (fumarole), NA not available in the literature, T temperature, EC electric conductivity, DO dissolved oxygen, and pH variables could report seasonal changes throughout the year Laguna Brava mats, oncoids, and microbialites [8,101,102] and Laguna Chaxas mats and microbialites (Fig. 3) [2,92] from Salar de Atacama; Laguna Pozo Bravo mats, stromatolites, and thrombolites (Fig.…”

Section: Evaporitic Gypsum-associated Microbial Ecosystemsmentioning

confidence: 99%

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Lithifying and Non-Lithifying Microbial Ecosystems in the Wetlands and Salt Flats of the Central Andes

et al. 2021

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Section: Evaporitic Gypsum-associated Microbial Ecosystemsmentioning

confidence: 71%

Section: Evaporitic Gypsum-associated Microbial Ecosystemsmentioning

confidence: 99%

Lithifying and Non-Lithifying Microbial Ecosystems in the Wetlands and Salt Flats of the Central Andes

et al. 2021

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“…In this sense, microbial mats without oxygenic photosynthesis could rely on other metabolic processes to cycle nutrients and energy and become highly stable structures to functional changes. Future studies on modern microbial mats in hydrothermal vents (Rassa et al, 2009;Miranda et al, 2016) and phototrophic, anoxygenic sites (Visscher et al, 2020) would provide insights into this hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Modern microbial mats from the Chihuahuan Desert provide insights into ecological stability throughout Earth’s history

Madrigal-Trejo

Sánchez-Pérez

Espinosa-Asuar

et al. 2021

Preprint

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Microbial mats are complex ecological assemblages that are found in the Precambrian fossil record and in extant extreme environments. Hence, these structures are regarded as highly stable ecosystems. In this work, we assess the ecological stability in a modern, fluctuating, hypersaline pond from the Cuatro Ciénegas Basin. From the 2016 to 2019 metagenomic sampling of this site, we found that this microbial site is sensitive to disturbances, which leads to high taxonomic replacement. Additionally, the mats have shown to be functionally stable throughout time, and could be differentiated between dry and rainy seasonal states. We speculate that this microbial system could represent modern analogs of ancient microbial mats where functions were preserved over time, whereas composition was subject to diversification in the face of local and planetary perturbations.

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“…The relative enrichment of As within the active dendritic pisoids could also be related to microbial influence. It is known that some microbial metabolisms involving As (such as arsenate reduction; Visscher et al ., 2020) favour carbonate precipitation as well as incorporation within the carbonates.…”

Section: Discussionmentioning

confidence: 99%

Assessing the origin of pisoids within a travertine system in the border of Puna Plateau, Argentina

et al. 2021

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The origin of pisoids in a diversity of environments has been recently discussed. While traditionally considered physico-chemical sedimentary products developed in turbulent environments, or even grown in situ, new results show that microbes may influence their development. In the Terma Los Hornos travertine system, two types of actively forming pisoids were recognized: (i) laminated pisoids with a concentrically laminated crust surrounding a nucleus; and (ii) dendriform radial pisoids with no distinct nucleus. Laminated pisoids form in turbulent pools at the base of waterfalls, while dendritic pisoids develop within small depressions between terracettes, and they can occur superposed as a result of episodic transport and recycling within the travertine system (for example, dendritic textures as nucleus of laminated pisoids). The laminated pisoids are characterized by laterally constant laminae thickness with high inheritance and low amounts of randomly distributed organic matter and microbial remains, suggesting a predominantly abiogenic origin. In contrast, the dendritic pisoids exhibit an intimate relationship with diatoms and filamentous bacteria suggesting a stronger biotic influence in their formation. Thus, both abiogenic and biogenic carbonate structures can coexist in the same hydrothermal system. Pisoids found in the stratigraphic record of Terma Los Hornos allowed to test the preservation potential of the primary signals and reconstructing early diagenetic overprints.

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Modern arsenotrophic microbial mats provide an analogue for life in the anoxic Archean

Cited by 36 publications

References 108 publications

Lithifying and Non-Lithifying Microbial Ecosystems in the Wetlands and Salt Flats of the Central Andes

Lithifying and Non-Lithifying Microbial Ecosystems in the Wetlands and Salt Flats of the Central Andes

Modern microbial mats from the Chihuahuan Desert provide insights into ecological stability throughout Earth’s history

Assessing the origin of pisoids within a travertine system in the border of Puna Plateau, Argentina

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