calc_lambda: Finite Rate of Increase lambda

In insectecol: Insect Ecology Data Analysis Toolkit

Finite Rate of Increase lambda

Description

The finite rate of increase: the multiplication factor of the population per unit time (day), lambda = exp(r). The population grows when lambda > 1, stays constant at lambda = 1 and declines when lambda < 1.

Usage

calc_lambda(lt, r = NULL)

Arguments

lt	A life_table object returned by lifeTable_read.
r	Optional; the result of calc_r. Supplying it avoids recomputing.

Value

A single numeric value: the finite rate of increase lambda.

References

Birch, L. C. (1948) The intrinsic rate of natural increase of an insect population. Journal of Animal Ecology 17(1), 15-26.

See Also

calc_r

Examples

f <- system.file("extdata", "lifetable_example.csv", package = "insectecol")
lt <- lifeTable_read(f)
calc_lambda(lt)

insectecol documentation built on Oct. 5, 2026, 5:08 p.m.