turnover {spaa}

Calculating species turnover

Description

Calculating species turnover based on the mean value between focus quadrat and their neighbours.

Usage

turnover(lab.mat, dist.mat, type = c("quart", "octal"))

Arguments

lab.mat

matrix of quadrat labels.

dist.mat

distance matrix between each pair of quadrats

type

"quart" indicates four neighbouring quadrats, "octal" indicate eight neighbouring quadrats.

Details

species turnover based on the mean value between centred quadrat and its neighbours.

Value

matrix with species turnover.

Author(s)

Jinlong Zhang [e-mail]

References

Lennon J. 2001 The geographical structure of British bird distributions - diversity, spatial turnover and scale Journal of Animal Ecology 70,966-979

See Also

XYname and lab.mat

Examples

##example turnover()
plotlab1 <- XYname(4,6)
xxx <- 1:240
dim(xxx) <- c(24, 10)
rownames(xxx) <- plotlab1
### Distance between each pair of plots
ddd <- dist(xxx)
### label matrix
labmat1 <- lab.mat(plotlab1)
yyy <- turnover(labmat1, ddd)