ade4 (version 1.4-3)

acacia: Spatial pattern analysis in plant communities

Description

Counts of individuals of Acacia ehrenbergiana from five parallel transects of 32 quadrats.

Usage

data(acacia)

format

acacia is a data frame with 15 variables : se.T1, se.T2, se.T3, se.T4, se.T5 are five numeric vectors containing quadrats counts of seedlings from transects 1 to 5 respectively; sm.T1, sm.T2, sm.T3, sm.T4, sm.T5 are five numeric vectors containing quadrats counts of small trees (crown < 1 $m^{2}$ in canopy) of transects 1 to 5 respectively; la.T1, la.T2, la.T3, la.T4, la.T5 are five numeric vectors containing quadrats counts of trees with large crown (crown > 1 $m^{2}$ in canopy) of transects 1 to 5 respectively.

source

Greig-Smith, P. and Chadwick, M.J. (1965) Data on pattern within plant communities. III. Acacia-Capparis semi-desert scrub in the Sudan. Journal of Ecology, 53, 465--474.

References

Hill, M.O. (1973) The intensity of spatial pattern in plant communities. Journal of Ecology, 61, 225--235.

Examples

data(acacia)
par(mfcol = c(5,3))
par(mar = c(2,2,2,2))
for(k in 1:15) {
    barplot(acacia[,k], ylim = c(0,20), col = grey(0.8))
    scatterutil.sub(names(acacia)[k], 1.5, "topleft")
}
par(mfcol = c(1,1))