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TZUNTIL:20231029T010000Z
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DTSTART:20211031T030000
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DTSTAMP:20260923T105957Z
DESCRIPTION:Fe(II) oxidation by O2 is an important process generating Fe (o
 xyhydr)oxides\, which play sorptive\, structural and electron-transfer rol
 es in soils. These roles in turn can have strong implications for the fate
  of organic matter\, particularly in redox-dynamic soils in which Fe oxida
 tion events are quite common. Leveraging a variety of different experiment
 s using surface and subsurface soils from the Calhoun and Luquillo Experim
 ental Forests (formerly Critical Zone Observatories) we explore how the ra
 te of Fe(II) oxidation (modulated by O2 concentration)\, the length of Fe(
 II) oxidizing conditions (i.e.\, amount of oxic exposure)\, and the presen
 ce of various surfaces and organic complexing agents during Fe oxidation h
 ave implications for organic matter mineralization and composition as well
  as for the evolution of Fe minerals in soils. Collectively\, our data sug
 gests that while Fe reduction is often a driver of elemental release and o
 rganic matter transformation\, this process is strongly influenced by the 
 characteristics of prior Fe(II) oxidation events.\n*** invited by Prof. St
 efan Peiffer\, Hydrology
DTSTART;TZID=Europe/Berlin:20211202T121500
DTEND;TZID=Europe/Berlin:20211202T134500
SUMMARY:Prof. Dr. Aaron Thompson\, Department of Crop and Soil Sciences\, U
 niversity of Georgia\, USA (Homepage): How iron oxidation can direct the f
 ate of organic matter and iron mineral composition in redox dynamic soils
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