primer (version 1.1.1)

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

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

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

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

See Also

DemoBoot, ProjMat

Examples

# NOT RUN {
### A two stage annual transition matrix
annual <- matrix( c( 0, 100, .025, 0), byrow=TRUE, nrow=2)
### Generate useful summaries
DemoInfo(annual)
# }