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Redox Heterogeneity Entangles Soil and Climate Interactions

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  • Jared L. Wilmoth

    (Department of Environmental Science and Technology, University of Maryland, College Park, MD 20742, USA)

Abstract

Interactions between soils and climate impact wider environmental sustainability. Soil heterogeneity intricately regulates these interactions over short spatiotemporal scales and therefore needs to be more finely examined. This paper examines how redox heterogeneity at the level of minerals, microbial cells, organic matter, and the rhizosphere entangles biogeochemical cycles in soil with climate change. Redox heterogeneity is used to develop a conceptual framework that encompasses soil microsites (anaerobic and aerobic) and cryptic biogeochemical cycling, helping to explain poorly understood processes such as methanogenesis in oxygenated soils. This framework is further shown to disentangle global carbon (C) and nitrogen (N) pathways that include CO 2 , CH 4 , and N 2 O. Climate-driven redox perturbations are discussed using wetlands and tropical forests as model systems. Powerful analytical methods are proposed to be combined and used more extensively to study coupled abiotic and biotic reactions that are affected by redox heterogeneity. A core view is that emerging and future research will benefit substantially from developing multifaceted analyses of redox heterogeneity over short spatiotemporal scales in soil. Taking a leap in our understanding of soil and climate interactions and their evolving influence on environmental sustainability then depends on greater collaborative efforts to comprehensively investigate redox heterogeneity spanning the domain of microscopic soil interfaces.

Suggested Citation

  • Jared L. Wilmoth, 2021. "Redox Heterogeneity Entangles Soil and Climate Interactions," Sustainability, MDPI, vol. 13(18), pages 1-14, September.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:18:p:10084-:d:632381
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