opticut (version 0.1-3)

warblers: Warblers Data Set

Description

Five species of warblers were studied to determine the factors controlling the species abundances and competition (MacArthur 1958).

Usage

data("warblers")

Format

A list with 3 elements: xtab is a list of sample x species matrices (sec_prc: percentages of total number of seconds of observations, num_prc: percentages of total number of observations in seconds, sec_cnt: counts based on percentages and totals of seconds, num_cnt: counts based on percentages and totals), samp is a data frame with sample level attributes such as height (6 is the base, 1 is the top of trees, most trees were 50--60 feet tall) and depth of branches in the canopy (B: bare or lichen- covered base, M: middle zone of old needles, T: terminal zone of new, less than 1.5 years old, needles or buds) , taxa is a data frame with scientific and common names for the species.

References

MacArthur, R. H., 1958. Population ecology of some warblers of northeastern coniferous forests. Ecology 39:599--619. <doi:10.2307/1931600>

Examples

data(warblers)
str(warblers)

warbh <- mefa4::groupSums(warblers$xtab$num_cnt, 1, warblers$samp$height)
warbd <- mefa4::groupSums(warblers$xtab$num_cnt, 1, warblers$samp$depth)
op <- par(mfrow=c(1,2))
matplot(rownames(warbh), warbh, type="b", xlab="height")
matplot(warbd, type="b", axes=FALSE, xlab="depth")
box()
axis(2)
axis(1, 1:3, rownames(warbd))
par(op)