caribouDF: Data for a caribou forage experiment

In jayverhoef/ZVHdata: Data Sets for Spatial Linear Models for Environmental Data

Data for a caribou forage experiment

Description

Data for a caribou forage experiment in Alaska, where 30 plots were placed in the field in a 5 x 6 grid and a two factor experiment, one with water added or not, and another with 3 different tarp treatments, were applied.

Usage

data(caribouDF)

Format

A data.frame with 30 records and 7 variables:

i

The ith row if envisioning the grid of plots as a matrix

j

The jth column if envisioning the grid of plots as a matrix

water

A factor with level "N" if no water was added, and a "Y" if water was added.

tarp

A factor with 3 levels: "clear" for a clear tarp over the plot, "none" as a control, and "shade" for a shade tarp over the plot

trt

A factor with 6 levels, treating each unique combination of water and tarp factors as a treatment level

z

The response variable, which was the percent nitrogen in prostrate willows in the 3rd clipping of the second year of the study

y

The y-coordinates of the plots in 2-D space

x

The x-coordinates of the plots in 2-D space

Source

These data were provided by Elizabeth Lenart of the Alaska Department of Fish and Game. The data were used in the publication below.

The R code that creates the data file from raw data can be found at system.file("raw data/caribouForage/create_caribouDF.R",package = "ZVHdata")

References

Lenart, E.A., Bowyer, R.T., Ver Hoef, J.M. and Ruess, R.W. 2002. Climate Change and Caribou: Effects of Summer Weather on Forage. Canadian Journal of Zoology 80: 664-678. (link to: Climate Change and Caribou: Effects of Summer Weather on Forage)

Examples

library(ZVHdata)
data(caribouDF)
names(caribouDF)
summary(caribouDF)
summary(lm(z ~ water + tarp + water:tarp, data = caribouDF))

jayverhoef/ZVHdata documentation built on Oct. 22, 2022, 8:35 p.m.