Mineralization global change

The chemistry of the mineral—water iaterface and of aquatic environmental particles and coUoids is reviewed ia References 25 and 26. References 16 and 27 review the role of the hydrosphere ia the biogeochemistry of global change. 

Dallas P., Anderson J. M., Bottner P., and Couteaux M. M. (2001b) Temperature responses of carbon mineralization in conifer forest soils from different regional climates incubated under standard laboratory conditions. Global Change Biol. 7(2), 181-192. 

A more appropriate definition of SOC for global change requirements might be that SOC represents all dead carbon from the land surface down (i.e., from the top of the conventional litter horizon) with no dimension greater than 2 mm, including such carbon present in the litter and O-horizons. All material greater than 2 mm is thus considered litter, a size that is commonly used in soil science and a distinction that is easily made and readily quantifiable. The present distinction between litter and the O-horizon is ambiguous in that in reality a continuum exists between carbon in litter, O-horizon, and mineral soil. The present distinction also cannot account for the presence of subsurface litter derived from recently dead roots, the turnover dynamics of which may be more similar to surface litter than the mineral soil. 

Krumbein W. E., Sehellnhuber H.-J. (1992) Geophysiology and Mineral Deposits - a Model for a Biological Driving Force of Global Changes Through Earth History. Terra Nova, 4 351-362. 

Land use changes, such as conversion of tropical forests to cattle pastures, affect biological N fixation, mineralization, nitrification, and denitrification (Davidson et al. 1993, Keller and Reiners 1994, Matson et al. 1987, Montagnini and Buschbacher 1989, Neill et al. 1995). Matson et al. (1987) estimated that N mobilized annually from deforestation was equivalent to more than half of the industrial N fixed globally and greater than the total amount of N delivered to oceans by rivers. 

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