Damian Chmura

Ellenberg indicator values - the way how to compute it using R software (www.r-project.org). The example data and code of function are below:

spec = read.delim('clipboard', row.names=1, h=T) # load species data - first sheet of data halophytes.xlsx

ell = read.delim('clipboard', h=T) # load Ellenberg indicator values - second sheet of the file

Example of calculation:

B <-eiv(species=spec, EIVS=ell, type='b') # it calculates arithmetic means

W <-eiv(species=spec, EIVS=ell, type='w') # it calculates community weighted means

EIV function

data halophytes

Function that caluclates a proxy for thermal climate based on altitude, slope and slope inclination (Ewald 2009).

The data with elevation (in m), slope (in degrees) and slope aspect (s in deg) are required.

data = read.delim('clipboard', row.names=1) # load data

attach(data) # attach data in order to not refer to name of data

elrel = elevcorr(altitude, exposure, slope) # it receives vector with computer values of elevation index

print(elrel) # the way to see it

Ewald J (2009). Epigeic bryophytes do not improve bioindication by Ellenberg values in mountain forests. Basic and applied ecology, 10(5), 420-426 )

elevcorr function

data