acorn: Acorn Production

In Blossom: Statistical Comparisons with Distance-Function Based Permutation Tests

Description

Acorn production data as related to oak (Quercus spp.) forest characteristics.

Usage

data(acorn)

Format

A data frame with 43 observations on the following 2 variables.

wtperha

Annual acorn biomass (kg/ha).

oakccsi

Forest suitability index based on canopy cover and number of oak species.

Source

Schroeder, R.L. and L.D. Vangilder. 1997. Tests of wildlife habitat models to evaluate oak mast production. Wildlife Society Bulletin 25, 639–646.

References

Cade, B.S., J.W. Terrell, and R.L. Schroeder. 1999. Estimating effects of limiting factors with regression quantiles. Ecology 80, 311–323.

Examples

str(acorn)
plot(acorn$oakccsi,acorn$wtperha,xlab = "Acorn suitability index",ylab = "Kg Acorns per ha")

Blossom documentation built on May 29, 2017, 10:55 p.m.