Low-level decomposition functions

Functions related to litter and soil carbon decomposition processes

Usage

decomposition_pHEffect(x, pool)

decomposition_annualLitterDecompositionRate(AET, lignin)

decomposition_snagFallProbability(DBH, decayClass, durability = 1)

decomposition_litterMetabolicFraction(ligninPercent, Nmass)

decomposition_moistureEffect(sand, clay, soilMoisture)

decomposition_temperatureEffect(soilTemperature)

Arguments

x: Soil water pH (0-14)
pool: String indicating the decomposition pool
AET: Actual evapotranspiration (mm)
lignin: Lignin percent
DBH: Diameter at breast height
decayClass: Decay class, from 1 to 5
durability: Wood durability, from 0 (less resistant) to 4 (see Oberle et al. 2018)
ligninPercent: lignin content (% of dry)
Nmass: nitrogen content (mg N / g dry)
sand, clay: Soil texture values in percent volume.
soilMoisture: Soil moisture content, relative to saturation.
soilTemperature: Soil temperature (in Celsius).

Value

Functions decomposition_moistureEffect, decomposition_pHEffect and decomposition_temperatureEffect return a scalar value representing a factor that should modify a decomposition rate. Function decomposition_annualLitterDecompositionRate directly returns a scalar value with the annual decomposition rate (yr-1). Function decomposition_litterMetabolicFraction returns a scalar with the fraction of litter that corresponds to metabolic carbon.

Details

Function decomposition_moistureEffect follows Kelly et al. (2000) Function decomposition_snagFallProbability follows Vanderwell et al. (2006)

References

Bonan, G. (2019). Climate change and terrestrial ecosystem modeling. Cambridge University Press, Cambridge, UK.

Vanderwel et al. (2006) Snag dynamics in partially harvested and unmanaged northern hardwood forests. Canadian Journal of Forest Research 36: 2769-2779.

Meentemeyer (1978)

Kelly et al (2000)

Author