IPMpack (version 2.1)

Hossfeld: Creates a Hossfeld function defining growth.

Description

Functional form describing growth according to a Hossfeld function.

Usage

Hossfeld(size, par)

Arguments

size

vector of sizes.

par

vector of length 3.

References

Zuidema, Jongejans, Chien, During & Schieving. 2010. Integral projection models for trees: a new parameterization method and a validation of model output. Journal of Ecology 98, p345-355.

Rivas, Gonzalez, Gonzalez & von Gadow. 2004. Compatible height and site index models for five pine species in El Salto, Durango (Mexico). Forest Ecology and Management 201, p145-160.

Examples

dff <- generateData()
sizeRange <- c(1:20)
sizeInit <- 1
Hossfeld(sizeRange, rep(1, 3))
plot(Hossfeld(1:10, rep(1, 3)), type = "l", 
    ylab = "Predicted increment from t to t+1", 
	xlab = "Continuous (size) stage in time t", col = "dark gray")