primer (version 0.1)

dlogistic: Discrete Logistic Growth

Description

Lotka-Volterra single species discrete population growth.

Usage

dlogistic(alpha = 0.01, rd = 1, N0 = 2, t = 15)

Arguments

alpha

per capita negative density dependence (a positive value will result in the usual negative effect)

rd

discrete growth increment

N0

initial population size

t

end time point

Value

• Returns a vector of population sizes from $N_0,\, \ldots,\, N_t$, for integer time points.

Details

Of the form, $$N_{t+1} = N_{t} + r_d N_{t}\left(1 - \alpha N_{t}\right)$$

References

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

See Also

clogistic, dlvcomp2

Examples

time <- 20
Ns <- dlogistic(t=20)
plot(0:time, Ns)