# Analysis of community ecology data in R

David Zelený

### Site Tools

en:data:removal_experiment

# Experimental data from randomized complete blocks

## Data source

Example data, coming with the book of Šmilauer & Lepš (2014), originally published in Špačková et al. (1998)

## Description of dataset

Design of the removal experiment with randomised complete blocks (from Šmilauer & Lepš 2014)

Experimental data studying the effect of dominant species, plant litter and moss on species composition of wet meadow plant community, with special focus on seedling recruitment. The experiment was established in four randomised complete blocks, the treatment had four levels, and the community composition was measured once. The experiment was established in March 1994, shortly after snowmelt. Each of the four randomized blocks contained four plots, each with a different treatment: (1) control plot, where the vegetation remained undisturbed, (2) a plot with the removal of litter, (3) a plot with the removal of dominant species Nardus stricta, and (4) a plot with the removal of litter and mosses (to remove only mosses without litter was not technically possible).

Example of seedlings from the study (drawings by Iva Kotorová, from Špačková et al. 1998)

## Locality

Experiment was conducted in experimental wet meadow Ohrazení, located around 10 km SE of Ceske Budejovice, Czech Republic. The vegetation can be classified into alliances Molinion and Violion caninae.

## Environmental variables

Name of variableDescription
treatmentName of the treatment: Cont = control, Litter = litter removed, Nardus = dominant species removed, Li+Mo - litter + mosses removed
blockBlock number
seedlsumTotal number of seedlings per plot

• seedl.xlsx - MS Excel format file, containing species data, environmental variables, description of experimental design and other information (this file comes with the book of Šmilauer & Lepš (2014), Chapter 15, Case study 4)

## Script for importing data into R

seedlings.spe <- read.delim ('https://raw.githubusercontent.com/zdealveindy/anadat-r/master/data/seedl-spe.txt', row.names = 1)