Integrative concepts of the biosphere, ecosystem, biogeocenosis and, recently, Earth's
critical zone embrace scientific disciplines that link matter, energy and organisms in a …

Soil organic matter (SOM) is correlated with reactive iron (Fe) in humid soils, but Fe also
promotes SOM decomposition when oxygen (O2) becomes limited. Here we quantify Fe …

Understanding the processes controlling organic matter (OM) stocks in upland soils, and the
ability to management them, is crucial for maintaining soil fertility and carbon (C) storage as …

Climate change models predict more frequent and severe droughts in the humid tropics.
How drought will impact tropical forest carbon and greenhouse gas dynamics is poorly …

Rhizosphere, a thin area of soil surrounding roots receiving carbon (C) exudation from
plants, represents a site of intense competition for available C and nutrient between surface …

Humid tropical forests have the fastest rates of organic matter decomposition globally, which
often coincide with fluctuating oxygen (O2) availability in surface soils. Microbial iron (Fe) …

Although tropical forests account for only a fraction of the planet's terrestrial surface, they
exchange more carbon dioxide with the atmosphere than any other biome on Earth, and …

Oxygen (O2) plays a critical and yet poorly understood role in regulating nitrous oxide (N2O)
production in well-structured agricultural soils. We investigated the effects of in situ O2 …

Oscillating redox conditions are a common feature of humid tropical forest soils, driven by an
ample supply and dynamics of reductants, high moisture, microbial oxygen consumption …

Fe (II) oxidation by O 2 is an important process generating Fe (oxyhydr) oxides, which play
sorptive, structural and electron-transfer roles in soils. Here we explored how native …