Drivers and patterns of iron redox cycling from surface to bedrock in a deep tropical forest soil: a new conceptual model
作者: Steven J. HallDaniel LiptzinHeather L. BussKristen DeAngelisWhendee L. Silver
作者单位: 1Iowa State University
2University of Colorado-Boulder
3University of Bristol
4University of Massachusetts Amherst
5University of California-Berkeley
刊名: Biogeochemistry, 2016, Vol.130 (1-2), pp.177-190
来源数据库: Springer Journal
DOI: 10.1007/s10533-016-0251-3
关键词: Critical zoneIron oxidationIron reductionMineral weatheringOxygenRedoxTEAP
英文摘要: Abstract(#br)Iron (Fe) reduction and oxidation are important biogeochemical processes coupled to decomposition, nutrient cycling, and mineral weathering, but factors controlling their rates and spatial distribution with depth are poorly understood in terrestrial soils. In aquatic ecosystems, Fe reduction often occurs below a zone of oxic sediments. We tested an alternative conceptual model for Fe redox cycling in terrestrial soils using a deep humid tropical forest soil profile. We hypothesized that Fe reduction in anaerobic microsites scales with depth variation in labile C and Fe availability, as opposed to bulk oxygen (O2). We measured bulk O2 at multiple depths from 0.1 to 5 m quasi-continuously over 18 months and sampled soils from surface to bedrock (~7 m)....
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影响因子:3.531 (2012)

  • bedrock 基岩
  • tropical 热带的
  • forest 季雨林
  • cycling 循环
  • redox 氧化还原
  • conceptual 概念
  • surface 
  • model 模型