ade4 (version 1.2-2)

kcponds: Ponds in a nature reserve

Description

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

Usage

data(kcponds)

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

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)

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))