An evolving view on biogeochemical cycling of iron

Biogeochemical cycling of iron is crucial to many environmental processes, such as ocean productivity, carbon storage, greenhouse gas emissions and the fate of nutrients, toxic metals and metalloids. Knowledge of the underlying processes involved in iron cycling has accelerated in recent years along...

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Bibliographic Details
Published in:Nature reviews. Microbiology 2021-06, Vol.19 (6), p.360-374
Main Authors: Kappler, Andreas, Bryce, Casey, Mansor, Muammar, Lueder, Ulf, Byrne, James M., Swanner, Elizabeth D.
Format: Article
Language:English
Subjects:
631/326/171
631/326/2565
704/158/855
704/47/4112
Ammonium
Biogeochemical cycles
Biogeochemistry
Biomedical and Life Sciences
Carbon sequestration
Chemical properties
Complexity
Contaminants
Cycles
Emissions
Environment
Environmental aspects
Greenhouse gases
Heavy metals
Infectious Diseases
Iron
Life Sciences
Medical Microbiology
Metalloids
Microbial metabolism
Microbiology
Microorganisms
Nutrients
Oxidation
Oxidation-reduction reaction
Parasitology
Review Article
Speciation
Virology
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Summary:Biogeochemical cycling of iron is crucial to many environmental processes, such as ocean productivity, carbon storage, greenhouse gas emissions and the fate of nutrients, toxic metals and metalloids. Knowledge of the underlying processes involved in iron cycling has accelerated in recent years along with appreciation of the complex network of biotic and abiotic reactions dictating the speciation, mobility and reactivity of iron in the environment. Recent studies have provided insights into novel processes in the biogeochemical iron cycle such as microbial ammonium oxidation and methane oxidation coupled to Fe( iii ) reduction. They have also revealed that processes in the biogeochemical iron cycle spatially overlap and may compete with each other, and that oxidation and reduction of iron occur cyclically or simultaneously in many environments. This Review discusses these advances with particular focus on their environmental consequences, including the formation of greenhouse gases and the fate of nutrients and contaminants. In this Review, Kappler and colleagues highlight recent advances in our understanding of the biogeochemical iron cycle, exploring the great complexity of the processes involved and novel mechanistic insights that have been gained.
ISSN:1740-1526
1740-1534
DOI:10.1038/s41579-020-00502-7