kcponds {ade4} | R Documentation

## Ponds in a nature reserve

### Description

This data set contains informations about 33 ponds in De Maten reserve (Genk, Belgium).

### Usage

    data(kcponds)

### Format

tab
  : a data frame with 15 environmental variables(columns) on 33 ponds(rows)
area
  : an object of class `area`
xy
  : a data frame with the coordinates of ponds
neig
  : an object of class `neig`

### Details

Variables of `kcponds$tab` are the following ones : depth, area, O2 (oxygen concentration), cond (conductivity), pH, Fe (Fe concentration), secchi (Secchi disk depth), N (NNO concentration), TP (total phosphorus concentration), chla (chlorophyll-a concentration), EM (emergent macrophyte cover), FM (floating macrophyte cover), SM (submerged macrophyte cover), denMI (total density of macroinvertebrates), divMI (diversity macroinvertebrates)

### Source

Cottenie, K. (2002) Local and regional processes in a zooplankton metacommunity. PhD, Katholieke Universiteit Leuven, Leuven, Belgium.
http://www.kuleuven.ac.be/bio/eco/phdkarlcottenie.pdf

### Examples

    data(kcponds)

    par(mfrow=c(3,1))
    area.plot(kcponds$area)
    s.label(kcponds$xy,add.p = TRUE, cpoi = 2, clab = 0)
    s.label(kcponds$xy,add.p = TRUE, cpoi = 3, clab = 0)
    s.label(kcponds$xy,add.p = TRUE, cpoi = 0, clab = 0,
         neig = kcponds$neig, cneig = 1)
    area.plot(kcponds$area)
    s.label(kcponds$xy, add.p = TRUE, clab = 1.5)
    w <- as.numeric(scalewt(kcponds$tab$N))
    s.value(kcponds$xy, w, cleg = 2, sub = "Nitrogen concentration",
         csub = 4, possub = "topright", include = FALSE)
    pca1 <- dudi.pca(kcponds$tab, scan = FALSE, nf = 4)
    if (require(maptools, quiet = TRUE) & require(spdep, quiet = TRUE)) {
    multi1 <- multispati(pca1, nb2listw(neig2nb(kcponds$neig)),
         scan = FALSE, nfposi = 2, nfnega = 1)
    summary(multi1)}
    par(mfrow = c(1,1))

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