simba (version 0.3-2)

bernina: Repeated vegetation records from 7 Alpine summits of the Bernina range.

Description

Repeated species records from 7 Alpine summits of the Bernina range. The data contains species data from repeated field recordings that were carried out on the summits between 1905 and 1907 (Ruebel 1912), in 1985 (Hofer 1992), and in 2003 (Walther et al. 2005). Data was compiled by Walther et al. (2005) and used in Jurasinski & Kreyling (2007) to investigate homogenization of Alpine summit floras.

Usage

data(bernina)

encoding

UTF-8

format

• veg

{ Complete pecies matrix that contains the species records from the repeated samplings. Integer entries of '0' and '1'. Hence, the matrix represents presence/absence information. }

itemize

• years

dots

.

• plot

{ Factor: The summit names. Repeat for each species and time period. } spec{ Factor: The species names. } occurrence{ Integer: The occurrence information. Because it is presence/absence it is '1' for all species in the list.}

item

• number
• summit
• altitude
• northing
• easting
• n.spec

code

length(years) == nrow(veg.lst)

source

Hofer HR, 1992. Veraenderungen in der Vegetation von 14 Gipfeln des Berninagebietes zwischen 1905 und 1985. Ber. Geobot. Inst. Eidg. Tech. Hochsch. Stift. Ruebel Zuer. 58: 39-54.

Jurasinski G & Kreyling J, 2007. Upward shift of alpine plants increases floristic similarity of mountain summits. Journal of Vegetation Science 18: 711–718. Ruebel E, 1912. Pflanzengeographische Monographie des Bernina-Gebietes. Engelmann, Leipzig, DE. Walther G-R, Beißner S, Burga CA, 2005. Trends in the upward shift of alpine plants. Journal of Vegetation Science 16: 541-548.

Examples

data(bernina)