RESTORING SUSTAINABLE FORESTS ON APPALACHIAN MINED LANDS FOR WOOD PRODUCTS, RENEWABLE ENERGY, CARBON SEQUESTRATION, AND OTHER ECOSYSTEM SERVICES Page: 12 of 28
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" C input (biomass production and sediment deposition)
" Chemical transformation of organic components (humification of SOM; protection of SOC)
" C loss (soil erosion and intersystem leaching)
All processes depicted in Figure 4, with the exception of (iii) and (iv), were modeled with
adequate precision and accuracy based on our assessment of the mine soil properties and the
mineland productivity and inferred from published information from the recent literature, such as
forest biomass allocation to roots by tree species (Jenkins et al. 2003) and SOM decomposition
rates (Fisher and Binkley 2000). Each model component, rate of SOM decomposition and
leaching to mention a few, was modeled as a function of one or more basic mine soil properties
that were readily and accurately measurable and that have been documented to affect the process
at hand. The tree biomass in roots and litter was estimated from C-prediction models on
minelands as function of site index (SI) and stand age that were described in detail in our
The mine soil properties that were used to predict the trend of each model component were
pH, mine soil age, mine soil texture (projected into the future as a function of rock type and age),
soil moisture, C/N ratio of the SOM, and soil temperature (inferred from climate data) (Figure 5).
An emphasis was set on those site/soil conditions that modified the soil fauna type and the extent
of microbial activity in the mine soil. The microbial component in the mine soil was
hypothesized to be the key factor for SOM decomposition and ecosystem nutrient cycling.
ite / Soil Conditions:
Root biomass Litter biomass
Soil O rganic so'
Matter - -corporatyon
0 decomposon rate
Aac on SOM decxmposition -
Active SOM pool -t
Slw rSO poo Lg
- - - -- -- from
Passive SOM pool --
Figure 5. Model components for soil organic matter pools and processes modeled in
a dynamic system modeling environment, STELLA, to predict the amount and
distribution among ecosystem components of the C sequestered on minelands.
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Burger, James A.; Galbraith, J.; Fox, T.; Amacher, G.; Sullivan, J. & Zipper, C. RESTORING SUSTAINABLE FORESTS ON APPALACHIAN MINED LANDS FOR WOOD PRODUCTS, RENEWABLE ENERGY, CARBON SEQUESTRATION, AND OTHER ECOSYSTEM SERVICES, report, November 29, 2004; United States. (https://digital.library.unt.edu/ark:/67531/metadc780576/m1/12/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.