To avoid biased results caused by insufficient data, only species
with a combined abundance of greater than 100 captured individuals
over the entire sampling period at both sites were included in
the analysis. Years with fewer than three recording dates for each
of these species were also excluded. Due to the difficulty in their
identification, Patrobus assimilis and P. atrorufus were considered
as one ‘pseudospecies’; Patrobus sp.