# Teasel: Population dynamics model transition matrix of teasel In diagram: Functions for Visualising Simple Graphs (Networks), Plotting Flow Diagrams

## 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

 `1` ```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 <[email protected]>

## 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

 ``` 1 2 3 4 5 6 7 8 9 10 11``` ```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") ```

### Example output

```Loading required package: shape
```

diagram documentation built on May 31, 2017, 2:44 a.m.