The R-package Btrait contains functions and data sets to work with density data, trait information and taxonomic relationships.
The package contains:
* functions to work with a combination of species-density (or species-biomass) data, species-trait information, and taxonomy
* two data sets with density and biomass data of the macrobenthos\footnote{macrobenthos are animals that live in the sediment and that are generally larger than 1 mm} in the North Sea.
* several macrobenthos trait databases