succniche {primer}R Documentation

A four-state model of successional dynamics

Description

This is the four-state, two-species model of the succession-niche model, after Pacala and Rees (1998). For use with ode in the deSolve package.

Usage

succniche(t, y, params)

Arguments

t Argument for the time point at integration
y A vector of length four, for states, E, M, S, and R.
params Vector or list of parameters

Value

Returns a list of length one, for use with ode in the deSolve package.

Component 1 vector of the state variable (a scalar for the proportion of sites occupied).

Author(s)

Hank Stevens <HStevens@muohio.edu>

References

S.W. Pacala and M. Rees. Models suggesting field experiments to test two hypotheses explaining successional diversity. The American Naturalist, 152:729-737, 1998.

M.H.H. Stevens. A Primer of Ecology with R. Use R! Series. Springer. 2009.

See Also

levins, compcol, compcolM

Examples

params.suc <- c(a=7, c=0.2, g=.1, m=0.04, D=0)
t=seq(0,50,.1)
init.suc <- c(S=0, E=0.5, M=0.5, R=0.00)
ccg.out <- data.frame(ode(init.suc, t, succniche, params.suc))
matplot(t, ccg.out[,-1], type="l", ylab="Relative Frequency", 
         xlab="Time", ylim=c(0,1) )
legend("right", colnames(ccg.out)[5:2], lty=4:1,  bty="n")

[Package primer version 0.1 Index]