acacia {ade4} | R Documentation

## 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.

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))

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