gotelli {primer} | R Documentation |
A function for the Propagule rain or mainland-island metaapopulation dynamics, for use with ode
in the deSolve
package.
gotelli(t, y, parms)
t |
Argument for time |
y |
A scalar for the population variable |
parms |
Vector or list of parameters |
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). |
Hank Stevens <HStevens@muohio.edu>
N. Gotelli. Metapopulation models: the rescue effect, the propagule rain, and the core-satellite hypothesis. The American Naturalist, 138:768–776, 1991.
M.H.H. Stevens. A Primer of Ecology with R. Use R! Series. Springer, 2009.
gotelli
, hanski
,lande
, MetaSim
clogistic
##---- Should be DIRECTLY executable !! ---- ##-- ==> Define data, use random, ##-- or do help(data=index) for the standard data sets. ## The function is currently defined as function (t, y, parms) { p <- y[1] with(as.list(parms), { dp <- ce * (1 - p) - e * p return(list(dp)) }) } library(deSolve) p <- c(ce=.1, e=.01) time <- 1:10 initialN <- .3 out <- ode(y=initialN, times=time, func=gotelli, parms=p) plot(time, out[,-1], type='l')