Data were partially published (e.g. Horsák & Hájek 2003).

The dataset includes information about species composition of molluscs sampled on 43 localities of spring fens in western Carpathians. At each locality, one quadrat of 16 m² was sampled for presence of molluscs: 12 litres of soil sample was collected from the quadrat (plus plant litter and aboveground vegetation) for determination of molluscs and abundances of particular species.

Several measured environmental variables were recorded for each plot, mostly chemical analysis of water sampled within the plot. For details of chemical analyses see Horsák & Hájek (2003).

• molluscs-fens.txt - matrix of molluscs species composition (plain text file, separated by tabulators - *.txt format)
• env-fens.txt - environmental variables (plain text file, separated by tabulators - *.txt format)

moll <- read.delim ('https://raw.githubusercontent.com/zdealveindy/recol/main/data/molluscs-fens.txt', row.names = 1)
env <- read.delim ('https://raw.githubusercontent.com/zdealveindy/recol/main/data/env-fens.txt', row.names = 1)
 

• Horsák M. & Hájek M. (2003): Composition and species richness of mollusc communities in relation to vegetation and water chemistry in the Western Carpathian spring fens: the poor-rich gradient. J. Moll. Stud. 69: 349-357 pdf