Abstract

Modern microbialites formed in soda-saline and soda lakes are of interest as model systems for studying geobiological interactions in the Precambrian, when such geochemical settings were widespread. This work describes the structure and mineral composition of microbialites from the soda-saline Laguna de Los Cisnes (Isla Grande, Tierra del Fuego, Chile), and also characterizes the biodiversity of microorganisms involved in their formation. The microbialites consist mainly of carbonate minerals, of which monohydrocalcite is of particular interest. It was shown that the formation of microbialites occurs under alkaline conditions in the presence of taxonomically and functionally diverse microorganisms and in direct contact with exopolysaccharides produced by the microbial community.

中文翻译：

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Soda-Saline Laguna de Los Cisnes (Isla Grande, 火地岛, 智利) 的微生物

摘要

在苏打盐和苏打湖中形成的现代微生物岩作为研究前寒武纪地球生物相互作用的模型系统很有意义，当时这种地球化学环境很普遍。这项工作描述了苏打盐湖 Laguna de Los Cisnes（智利火地岛大岛）微生物岩的结构和矿物组成，还描述了参与其形成的微生物的生物多样性。微生物岩主要由碳酸盐矿物组成，其中一水方解石是特别令人感兴趣的。结果表明，微生物岩的形成发生在碱性条件下，存在分类学和功能多样的微生物，并与微生物群落产生的胞外多糖直接接触。