birds {TH.data} | R Documentation

## Habitat Suitability for Breeding Bird Communities

### Description

Environmental variables and bird counts for identifying suitable bird habitats

### Usage

    data("birds")

### Format

A data frame with 258 observations on the following 10 variables.

`GST`

  Growing stock per grid

`DBH`

  Mean diameter of the largest three trees

`AOT`

  Age of oldest tree

`AFS`

  Age of forest stand

`DWC`

  Amount of dead wood of conifers

`LOG`

  Amount of logs per grid

`x_gk`

  grid location, x coordinate

`y_gk`

  grid location, y coordinate

`SG4`

  observed number of birds from structural gild 4: Requirement of regeneration (Phylloscopus trochilus, Aegithalos caudatus)

`SG5`

  observed number of birds from structural gild 5: Requirement of regeneration combined with planted conifers (Phylloscopus collybita, Turdus merula, Sylvia atricapilla).

### Details

Counts of breeding bird communities collected at 258 observation plots in a northern Bavarian forest district are the response variable of interest. Along with the number of birds in two structural gilds, 6 covariates are given here and one is interested in quantifying their impact on habitat suitability.

### Source

Joerg Mueller (2005). Forest structures as key factor for beetle and bird communities in beech forests. PhD thesis, Munich University of Technology. http://mediatum.ub.tum.de

### References

Thomas Kneib and Joerg Mueller and Torsten Hothorn (2008), Spatial smoothing techniques for the assessment of habitat suitability, Environmental and Ecological Statistics, 15(3), 343–364.

[Package TH.data version 1.0-8 Index]