R: Population dynamics model transition matrix of teasel

Teasel {diagram} | R Documentation

## Population dynamics model transition matrix of teasel

### Description

Transition matrix of the population dynamics model of teasel (Dipsacus sylvestris), a European perennial weed, as discussed in Caswell (2001), and in Soetaert and Herman, (2009)

The life cycle of teasel can be described by six stages:

- dormant seeds < 1yr (DS 1yr)

- dormant seeds 1-2yr (DS 2yr)

- small rosettes <2.5cm (R small)

- medium rosettes 2.5-18.9 cm (R medium)

- large rosettes >19 cm (R large)

- flowering plants (F)

The matrix contains the transition probabilities from one compartment (column) to another (row).

### Usage

    Teasel

### Format

matrix with transition probabilities, where element ij denotes transition from compartment j to i

rownames and columnames are the component names

### Author(s)

Karline Soetaert <karline.soetaert@nioz.nl>

### References

Caswell, H. 2001. Matrix population models: construction, analysis, and interpretation. Second edition. Sinauer, Sunderland, Mass.

Karline Soetaert and Peter Herman. 2009. A practical guide to ecological modelling. Using R as a simulation platform. Springer.

### See Also

`Rigaweb`, `Takapotoweb`

### Examples

    curves <- matrix(nrow = ncol(Teasel), ncol = ncol(Teasel), 0)
    curves[3,1] <- curves[1,6] <- -0.35
    curves[4,6] <- curves[6,4] <- curves[5,6] <- curves[6,5] <- 0.08
    curves[3,6] <- 0.35

    plotmat(Teasel, pos = c(3, 2, 1), curve = curves, lwd = 1, box.lwd = 2,
            cex.txt = 0.8, box.cex = 0.8, box.size = 0.08, arr.length = 0.5,
            box.type = "circle", box.prop = 1, shadow.size = 0.01,
            self.cex = 0.6, my = -0.075, mx = -0.01, relsize = 0.9,
            self.shifty = 0, self.shiftx = c(0, 0, 0.125, -0.12, 0.125, 0),
            main = "Dispsacus sylvestris")

[Package diagram version 1.6.4 Index]