README file for the data file
EWcarabids1999-2022_rawdata.csv

Authors:
Linde, Andreas
Weiss, Fabio (ORCID 0000-0003-1078-1528)

Describtion of variables:

sample_id = unique identifier for each interval (including information of plot_year_interval)
sample_id2 = unique identifier for each sample (including information of plot_year_interval_trap)
year = year of sampling
interval = number indicating if the data was collected in the 1st, 2nd or 3rd interval of each year
trap = identifier of the respective trap (one of four) within one plot, trap numbering is not consistent among years and trap numbers are not unique. A unique trap identifier can be produced by combining information of trap, plot and year.
plot = identifier of the respective forest plot (rectangular plots of appr. 500m2 with 4 pitfall traps)
site = grouping variable accounting for uneven spatial distribution of plots. Plots with the same value for 'site' are located closer to each other.
species = carabid beetles species, species were identified according to Müller-Motzfeld (2004).
abundance = sum of individuals of the same carabid beetles species collected by one pitfall trap in the respective interval/year/plot.

References:

Müller-Motzfeld, G. (2004). Bd. 2 Adephaga 1: Carabidae (Laufkäfer). - In: Freude, H., Harde, K. W., Lohse, G. A. & Klausnitzer, B.: Die Käfer Mitteleuropas. 2nd edn. Spektrum Akademischer Verlag, Heidelberg/Berlin.