Dataset for the manuscript entitled "Can vermicomposting be used to process hyperaccumulator biomass in nickel agromining?"

Data generated during an experiment of decomposition of biomass of the nickel hyperaccumulator Bornmuellera emarginata by the earthworm Eisenia andrei and associated microoganisms. Five files are included: "readme.txt" is a file where we explain the meaning of each column (and in which units is expressed) in each of the other four files. "biomass.csv" is a table with biomass of different fractions and the number of Eisenia andrei individuals in each experimental unit. "FTIR.csv" is a file with the raw spectral data we obtained from the litter by Fourier Transform Infrared spectroscopy combined with Attenuated Total Reflectance (FTIR-ATR). First column indicate the wavenumber (cm-1) and the other columns indicate the absorbance values of each biomass sample for each wavenumber. "composition.csv" is a file with the pH, electrical conductivity, basal respiration and concentrations of different chemical elements measured in different fractions of each experimental unit "nickel.csv" contains the pseudototal and DTPA-extractable concentrations of Ni in different compartments of each experimental unit, as well as the total amount of this element (mg of Ni) in each compartment of each experimental unit.