R: Herbs of the Siskiyou Mountains

siskiyou {prabclus} | R Documentation

## Herbs of the Siskiyou Mountains

### Description

Distributions of species of herbs in relation to elevation on quartz diorite in the central Siskiyou Mountains. All values are per mille frequencies in transects (The number of 1 m2 quadrats, among 1000 such quadrats, in which a species was observed, based on 1250 1m2 quadrats in the first 5 transects, and 400 1m2 quadrats in 6. transect). Observed presences in the transect, outside the sampling plots, were coded as 0.2. Rows correspond to species, columns correspond to regions.

### Usage

    data(siskiyou)

### Format

Three objects are generated:

siskiyou

  numeric matrix giving the 144*6 abundance values.

siskiyou.nb

  neighborhood list for the 6 regions.

siskiyou.groups

  integer vector of length 144, giving group memberships for the 144 species.

### Details

Reads from example data files `LeiMik1.dat, LeiMik1NB.dat, LeiMik1G.dat`.

### Source

Whittaker, R. H. 1960. Vegetation of the Siskiyou Mountains, Oregon and California. Ecol. Monogr. 30: 279-338 (table 14).

### Examples

    data(siskiyou)

[Package prabclus version 2.2-6 Index]