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, (in prep)

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 <k.soetaert@nioo.knaw.nl>

    References

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

    Karline Soetaert and Peter Herman. A guide to ecological modelling. Book in preparation.

    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 1.1 Index]