Soil heterogeneity in agricultural and natural ecosystems : relationships between anaerobic activity, organic matter, nutrients, and greenhouse gases
Many soil biogeochemical processes are difficult to predict, in part, due to the spatial heterogeneity of physical, chemical, and biological components of soil. Understanding how heterogeneity forms and affects biogeochemical processes is important because of the ultimate impacts on nutrient availability, carbon storage, and climate change. Oxygen and soil organic matter are two key components of soil microbial habitat, so I performed research to determine how the heterogeneity of each affect ecosystem functions. Oxygen can be absent in soil aggregates, litter patches, rhizospheres, and the guts ...