ecorest (version 2.0.0)

HUcalc: Computes Habitat Quality, Quantity, and Units

Description

HUcalc computes habitat units given a set of suitability indices, a habitat suitability index equation, and habitat quantity.

Usage

HUcalc(SI.out, habitat.quantity, HSIfunc, ...)

Value

A vector of habitat quality, habitat quantity, and index units (quantity times quality).

Arguments

SI.out

is a vector of application-specific suitability indices, which can be produced from SIcalc.

habitat.quantity

is a numeric of habitat size associated with these suitability indices (i.e., length, area, or volume).

HSIfunc

is a function for combination of the suitability indices.

...

optional arguments to HSIfunc.

References

US Fish and Wildlife Service. (1980). Habitat as a basis for environmental assessment. Ecological Services Manual, 101.

US Fish and Wildlife Service. (1980). Habitat Evaluation Procedures (HEP). Ecological Services Manual, 102.

US Fish and Wildlife Service. (1981). Standards for the Development of Habitat Suitability Index Models. Ecological Services Manual, 103.

Examples

#Summarize habitat outcomes based on a vector of two suitability indices
#using multiple combination equations.
HUcalc(c(0.1,1), 100, HSIarimean)
HUcalc(c(0.1,1), 100, HSIgeomean)
HUcalc(c(0.1,1), 100, HSImin)
HUcalc(c(0.1,1), 100, HSIwarimean, c(1,0))
HUcalc(c(0.1,1), 100, HSIwarimean, c(0,1))

#HSIfunc can also represent functions outside of the ecorest package
HUcalc(c(0.1,1), 100, mean)
HUcalc(c(0.1,1), 100, max)