R: Oribatid Mite Data with Explanatory Variables

mite {vegan} | R Documentation

## Oribatid Mite Data with Explanatory Variables

### Description

Oribatid mite data. 70 soil cores collected by Daniel Borcard in 1989. See Borcard et al. (1992, 1994) for details.

### Usage

    data(mite)
    data(mite.env)
    data(mite.pcnm)
    data(mite.xy)

### Format

There are three linked data sets: `mite` that contains the data on 35 species of Oribatid mites, `mite.env` that contains environmental data in the same sampling sites, `mite.xy` that contains geographic coordinates, and `mite.pcnm` that contains 22 PCNM base functions (columns) computed from the geographic coordinates of the 70 sampling sites (Borcard & Legendre 2002). The whole sampling area was 2.5 m x 10 m in size.

The fields in the environmental data are:

SubsDens

  Substrate density (g/L)

WatrCont

  Water content of the substrate (g/L)

Substrate

  Substrate type, factor with levels `Sphagn1, Sphagn2 Sphagn3 Sphagn Litter Barepeat Interface`

Shrub

  Shrub density, an ordered factor with levels `1` < `2` < `3`

Topo

  Microtopograhy, a factor with levels `Blanket` and `Hummock`

### Source

Pierre Legendre

### References

Borcard, D., P. Legendre and P. Drapeau. 1992. Partialling out the spatial component of ecological variation. Ecology 73: 1045-1055.

Borcard, D. and P. Legendre. 1994. Environmental control and spatial structure in ecological communities: an example using Oribatid mites (Acari, Oribatei). Environmental and Ecological Statistics 1: 37-61.

Borcard, D. and P. Legendre. 2002. All-scale spatial analysis of ecological data by means of principal coordinates of neighbour matrices. Ecological Modelling 153: 51-68.

### Examples

    data(mite)

[Package vegan version 2.4-3 Index]