transfgradient: Gradient for Hypothetical Example of Turover of Species...
In BiodiversityR: Package for Community Ecology and Suitability Analysis

transfgradient

R Documentation

Gradient for Hypothetical Example of Turover of Species Composition

Description

This dataset documents the site sequence of 19 sites on a gradient determined from unimodal species distributions. The dataset is accompanied by transfspecies that documents the species composition of the sites. This is a hypothetical example that allows to investigate how well ecological distance measures or ordination methods recover the expected best sequence of sites.

Usage

data(transfgradient)

Format

A data frame with 19 observations on the following variable.

gradient: a numeric vector

Source

Legendre, P. & Gallagher, E.D. (2001) Ecologically meaningful transformations for ordination of species data. Oecologia 129: 271-280.

References

Figure 3a.

Examples

data(transfspecies)
data(transfgradient)
plot(transfspecies[,1]~transfgradient[,1],xlab="gradient",
    ylab="species abundance",type="n",ylim=c(0.5,8.5))
for (i in 1:9) {points(transfgradient[,1],transfspecies[,i],type="o",pch=i)}

BiodiversityR documentation built on June 22, 2024, 11:57 a.m.