Stabilization and destabilization of soil organic matter—a new focus
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Interest in soil organic matter (SOM) is ramping up as concern mounts about steadily increasing levels of atmospheric CO2. There are two reasons for this. First, there is hope that improvements in crop, forest, and soil management may allow significant amounts of CO2 to be removed from the atmosphere and sequestered in soil. Second is the possibility that increased soil respiration rates, associated with climate change, will unleash a positive feedback in which temperatures rise even faster than now expected. Other reasons have long existed for understanding SOM dynamics, such as SOM as the source of most of the non-fertilizer N needed for plant growth, but the specter of run-away climate change seems to have now overtaken these other justifications.
Much of the work on SOM triggered by climate change has involved measuring pools over large areas and, especially, changes in those pools over time (Smith 2004; Bellamy et al. 2005). Other work has sought to measure changes in soil C and...
- Baisden WT, Parfitt R. Bomb 14C enrichment indicates decadal C pool in deep soil. Biogeochemistry (this volume)Google Scholar
- Crow SE, Swanston C, Lajtha K, Brooks JR, Keirstead H Density fractionation of forest soils: methodological questions and interpretation of incubation results and turnover time in an ecosystem context. Biogeochemistry (this volume)Google Scholar
- Currie W, Nadelhoffer K, Aber J (1999) Soil detrital processes controlling the movement of 15N tracers to forest vegetation. Ecol Appl 9:87–102Google Scholar
- Essington ME (2004) Soil and water chemistry: an integrative approach. CRC Press, Boca Raton, Florida, USAGoogle Scholar
- Kleber M, Sollins P, Sutton R A conceptual model of organo-mineral interactions in soils: self-assembly of organic molecular fragments into multilayered structures on mineral surfaces. Biogeochemistry (this volume)Google Scholar
- Knicker H Vegetation fires and burnings; how do they affect the nature and stability of soil organic nitrogen and carbon? A review. Biogeochemistry (this volume)Google Scholar
- Lehmann J, Kinyangi J, Solomon D Organic matter stabilization in soils: physical occlusion or formation of organo–mineral complexes? Biogeochemistry (this volume)Google Scholar
- Nierop K, Filley T (2006) Assessment of lignin and (poly-)phenol transformations in oak (Quercus robur) dominated soils by 13C-TMAH thermochemolysis. Org Geochem (in press)Google Scholar
- Rastetter E, Ryan M, Shaver G, Melillo J, Nadelhoffer K, Hobbie J, Aber J (1991) A general biogeochemical model describing the responses of the C and N cycles in terrestrial ecosystems to changes in CO2, climate and N deposition. Tree Physiol 9:101–126Google Scholar
- Rillig M, Caldwell B, Wösten H, Sollins P Role of proteins in soil carbon and nitrogen storage: controls on persistence. Biogeochemistry (this volume)Google Scholar
- Stevenson F (1994) Humus chemistry: genesis, composition, reactions. Wiley, New York, USAGoogle Scholar