Impact of ecohydrological fluctuations on iron-redox cycling

Published

Journal Article

© 2019 Elsevier Ltd Because of its interaction with plants, carbon decomposition, and soil properties, soil iron cycle has been recognized as an important player in the carbon and other biogeochemical cycles. The impact of the hydrologic cycle and plants on it, however, remains largely unexplored. Here we focus on terrestrial ecosystems and develop a dynamical system to analyze the coupling between iron and carbon dynamics in the soil root zone as driven by fluctuations in soil moisture. Particular emphasis is placed on the modeling of the soil organic matter, the Fe-reducing population, the iron Fe 2+ -Fe 3+ cycling, and the soil moisture level, which controls the redox rates. Informed by laboratory and field measurements from a tropical forest, our results suggest that soil moisture and litterfall rates are the primary drivers of iron fluctuations at daily-to-seasonal temporal scales. We also emphasize the important role of soil iron cycle in the decomposition of the organic matter.

Full Text

Duke Authors

Cited Authors

  • Calabrese, S; Porporato, A

Published Date

  • June 1, 2019

Published In

Volume / Issue

  • 133 /

Start / End Page

  • 188 - 195

International Standard Serial Number (ISSN)

  • 0038-0717

Digital Object Identifier (DOI)

  • 10.1016/j.soilbio.2019.03.013

Citation Source

  • Scopus