AHMbook (version 0.2.5)

SwissAtlasHa: Data for 1ha quadrats from the Swiss Breeding Bird Atlas

Description

A 1ha-scale subset of the count data from the most recent Swiss Breeding Bird Atlas (Knaus et al. 2018). The data consists of replicate counts of birds from 2,318 1ha quadrats for 78 passerine species. Each quadrat is surveyed up to three times during the breeding season (only twice above the tree line).

Usage

data("SwissAtlasHa")

Format

SwissAtlasHa is a list with 3 elements:

counts

a sites x replicates x species array of counts

sites

a data frame with rows for 2318 1ha quadrats and the following columns:

• x : the x coordinate of the center of the quadrat; the coordinate reference system is intentionally not specified.

• y : the y coordinate of the center of the quadrat.

• elevation : the mean elevation of the quadrat, m.

• slope : the slope.

• north : the aspect, with due south = -1, due north = 1.

• forest : proportion of forest cover.

• nsurvey : the number of replicate surveys carried out in the quadrat.

date

a sites x replicates matrix with Julian dates of the surveys, 1 January = 1

References

Knaus, P., S. Antoniazza, S. Wechsler, J. Gu<U+00E9>lat, M. K<U+00E9>ry, N. Strebel, & T. Sattler (2018) Brutvogelatlas 2013<U+2013>2016. Bestandsentwicklung der Brutv<U+00F6>gel der Schweiz und des F<U+00FC>rstentums Liechtensteins (Swiss Breeding Bird Atlas 2013<U+2013>2016). Schweizerische Vogelwarte, Sempach.

K<U+00E9>ry, M. & Royle, J.A. (2021) Applied Hierarchical Modeling in Ecology AHM2 - 8.4.2.

Examples

# NOT RUN {
data(SwissAtlasHa)
str(SwissAtlasHa)
# display the species names:
dimnames(SwissAtlasHa$counts)[[3]]
# }