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A biogeochemical–hydrological framework for the role of redox-active compounds in aquatic systems

Title data

Peiffer, Stefan ; Kappler, A. ; Haderlein, S. B. ; Schmidt, C. ; Byrne, J. M. ; Kleindienst, S. ; Vogt, C. ; Richnow, H. H. ; Obst, Martin ; Angenent, L. T. ; Bryce, C. ; McCammon, Catherine ; Planer-Friedrich, Britta:
A biogeochemical–hydrological framework for the role of redox-active compounds in aquatic systems.
In: Nature Geoscience. Vol. 14 (6 May 2021) . - pp. 264-272.
ISSN 1752-0908
DOI: https://doi.org/10.1038/s41561-021-00742-z

Abstract in another language

Redox-driven biogeochemical element cycles play a central role in converting organic matter in aquatic ecosystems. They also perform key functions such as removing nitrate, mitigating the formation of greenhouse gases and weakening the effects of contaminants. Recent research has revealed the presence of redox-active compounds in these ecosystems with hitherto unknown redox properties. These substances are metastable (that is, non-equilibrium solid phases), which can both donate and accept electrons. They are highly redox reactive and recyclable and may act as biogeobatteries by temporarily storing electrons. Their lifetime, however, is limited, and with time they become more crystalline and less reactive. In this Review, we argue that these redox-active metastable phases require activation by fluctuating redox conditions to maintain their high reactivity. In aquatic ecosystems, switching between oxidizing and reducing conditions can be achieved only through hydrological perturbations at hydrological interfaces (for example, water level fluctuations). We present a novel framework that links microscale biogeochemical processes to large-scale hydrological processes, and discuss implications and future research directions for biogeochemical element cycles in aquatic systems exposed to frequent hydrological disturbances.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Biogeochemistry; Ecology; Hydrology; RAMPs
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group > Professor Environmental Geochemistry - Univ.-Prof. Dr. Britta Planer-Friedrich
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Heisenberg Professorship - Experimental Biogeochemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Heisenberg Professorship - Experimental Biogeochemistry > Heisenberg Professorship - Experimental Biogeochemistry - Univ.-Prof. Dr. Martin Obst
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 550 Earth sciences, geology
Date Deposited: 11 May 2021 08:08
Last Modified: 10 Jun 2021 04:51
URI: https://eref.uni-bayreuth.de/id/eprint/65167