Pulse Brain · Growing Health Evidence Index
Tier 3 — Observational / field trialPeer-reviewed

Stable Fe isotope fractionation during dissimilatory Fe(III) reduction by a thermoacidophile in acidic hydrothermal environments

Piyali Chanda, Maximiliano J. Amenábar, Eric S. Boyd, Brian L. Beard, Clark M. Johnson

Geochimica et Cosmochimica Acta · 2020

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Summary

This geochemical study investigates stable iron isotope fractionation during dissimilatory Fe(III) reduction by thermoacidophilic microorganisms under laboratory-simulated acidic hydrothermal conditions. By characterising the isotopic signatures produced during microbial iron metabolism, the work refines understanding of geochemical biomarkers and microbial iron cycling in extreme environments. The findings contribute to palaeoenvironmental reconstruction and interpretation of microbial processes in subsurface and hydrothermal settings, though application to agricultural soil systems is indirect.

UK applicability

This fundamental geochemistry research has limited direct applicability to UK farming systems. However, the isotopic methods developed may inform understanding of iron cycling and bioavailability in UK acidic soils under microbial activity, particularly in research contexts studying soil microbial metabolism.

Key measures

Stable iron isotope ratios (δ⁵⁶Fe); fractionation factors during dissimilatory ferric iron reduction; isotopic signatures under acidic hydrothermal conditions

Outcomes reported

The study measured stable iron isotope fractionation (δ⁵⁶Fe) during dissimilatory Fe(III) reduction by thermoacidophilic microorganisms in laboratory acidic hydrothermal conditions. The work characterised isotopic signatures produced during microbial iron metabolism to refine interpretation of geochemical biomarkers.

Theme
Measurement & metrics
Subject
Soil biology & microbiology
Study type
Research
Study design
Laboratory experiment
Source type
Peer-reviewed study
Status
Published
System type
Laboratory / in vitro
DOI
10.1016/j.gca.2020.09.025
Catalogue ID
BFmokjoedh-u9myqe

Topic tags

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