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Acid Test - Crossref

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Last Updated: 10 April 2022

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The production of diverse brGDGTs by an Acidobacterium allows a direct test of temperature and pH controls on their distribution

Abstract based on microbial lipid biomarkers stored in geological archives and can be used to analyze past climate changes. Branched glycerol dialkyl glycerol tetraethers are specific bacterial biomarkers that have been used as molecular probes for the quantitative determination of terrestrial temperatures and the pH of depositional environments over a variety of geological timescales. Consequently, culture-derived paleoclimate indices are in accordance with the global soil-derived MBT' 5ME proxy for temperature but not the CBT 5ME proxy for pH. Branched glycerol dialkyl tetraethers are biomarkers widely used in quantitative estimation of recent climate changes due to their ubiquitous presence in the environment and their correlations with temperature and pH. Our research provides a major advancement in understanding the physiological role of lipid structures in microbial adaptation and aids us in determining the relationships between brGDGT-based proxies and geological conditions.

Source link: https://doi.org/10.1101/2022.04.07.487437

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