primer (version 0.1)

DemoInfo: Demographic Analyses

Description

Given a demographic projection matrix (aka transition matrix), this calculates $\lambda$, stable age/stage structure, reproductive value, sensitivity, and elasticity.

Usage

DemoInfo(mat)

Arguments

mat

A matrix of demographic transitions (Leslie [age] or Lefkovitch [stage] matrix)

Value

• Returns a list with these components.
• lambda
  A scalar, long term asymptotic growth rate.
• SSD
  A vector of stable age/stage structure
• RV
  A vector of reproductive value
• Sensitivities
  A matrix of sensitivities
• Elasticities
  A matrix of elasticities
• PPM
  A population projection matrix

References

H. Caswell.2001. Matrix Population Models: Construction, Analysis, and Interpretation. Sinauer Associates, Inc., Sunderland, MA, USA, 2nd ed. edition.

S.P. Ellner and J. Guckenheimer. 2006. Dynamic Models in Biology. Princeton University Press.

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

See Also

DemoBoot, ProjMat,

Examples

### A two stage annual transition matrix
annual <- matrix( c( 0, 100, .025, 0), byrow=TRUE, nrow=2)
### Generate useful summaries
DemoInfo(annual)