Blossom (version 1.4)

habitat: Blue grouse winter habitat selection data

Description

Example comparing used versus available blue grouse winter habitat described by the basal area measurements of four species of trees present in stands on winter range.

Usage

data(habitat)

Format

A data frame with 16 observations on the following 5 variables.

use

An indicator of which habitat was used by blue grouse (1) and which was available (2).

dfir

Basal area (m^2/ha) for Douglas-fir.

junip

Basal area (m^2/ha)for juniper.

aspen

Basal area (m^2/ha)for aspen.

other

Basal area (m^2/ha)for other trees.

Source

Cade, B.S., and R.W. Hoffman. 1990. Winter use of Douglas-fir forests by blue grouse in Colorado. Journal of Wildlife Management 54, 471--479.

Examples

Use<-c("Used","Available")
par(mfrow = c(2,2),mar = c(3,4,3,2))
boxplot(habitat$dfir~Use[habitat$use],col = "darkgreen",
    main = "Fir basal area measurement\n in used and available habitat",
    ylab = "Basal Area Measurement")
boxplot(habitat$junip~Use[habitat$use],col = "blue",
    main = "Juniper basal area measurement\n in used and available habitat",
    ylab = "Basal Area Measurement")
boxplot(habitat$aspen~Use[habitat$use],col = "orange",
    main = "Aspen basal area measurement\n in used and available habitat",
    ylab = "Basal Area Measurement")
boxplot(habitat$other~Use[habitat$use],col = "brown",
    main = "Other basal area measurement\n in used and available habitat",
    ylab = "Basal Area Measurement")