86: Effects of moisture on decomposition rates according to the...
In SoilR: Models of Soil Organic Matter Decomposition

Description Usage Arguments Value Author(s) References Examples

Calculates the effects of moisture on decomposition rates according to the StandCarb model.

1 2	fW.Standcarb(Moist, MatricShape = 5, MatricLag = 0, MoistMin = 30, MoistMax = 350, DiffuseShape = 15, DiffuseLag = 4)

`Moist`	A scalar or vector containing values of moisture content of a litter or soil pool (%).
`MatricShape`	A scalar that determines when matric limit is reduced to the point that decay can begin to occur.
`MatricLag`	A scalar used to offset the curve to the left or right.
`MoistMin`	A scalar determining the minimum moisture content.
`MoistMax`	A scalar determining the maximum moisture content without diffusion limitations.
`DiffuseShape`	A scalar that determines the range of moisture contents where diffusion is not limiting.
`DiffuseLag`	A scalar used to shift the point when moisture begins to limit diffusion.

A data frame with limitation due to water potential (MatricLimit), limitation due to oxygen diffusion (DiffuseLimit), and the overall limitation of moisture on decomposition rates (MoistDecayIndex).

Carlos A. Sierra, Markus Mueller

Harmon, M. E., and J. B. Domingo (2001), A users guide to STANDCARB version 2.0: A model to simulate carbon stores in forest stands. Oregon State University, Corvallis.

MC=0:500
DeadFoliage=fW.Standcarb(MC)
DeadBranch=fW.Standcarb(MC,MoistMax=200)
DeadWood=fW.Standcarb(MC,MoistMax=150)
StableSoil=fW.Standcarb(MC,MoistMin=15,MoistMax=100)
plot(MC,DeadFoliage$MoistDecayIndex,type="l",xlab="Moisture Content (%)",
     ylab="f(W) (unitless)",
     main="Effects of moisture on decomposition rates according to the StandCarb model")
lines(MC,DeadBranch$MoistDecayIndex,col=4)
lines(MC,DeadWood$MoistDecayIndex,col=3)
lines(MC,StableSoil$MoistDecayIndex,col=2)
legend("topright",c("Dead Foliage","Dead Branch","Dead Wood","Stable Soil"),
       lty=c(1,1,1),col=c(1,4,3,2),bty="n")