DemoInfo {primer}R Documentation

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

Author(s)

Hank Stevens (HStevens@muohio.edu)

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)

[Package primer version 0.1 Index]