Fig. 1From: Invaders, natives and their enemies: distribution patterns of amphipods and their microsporidian parasites in the Ruhr Metropolis, GermanyMap showing sampling sites and amphipod lineages/species found. Numbers indicate sampling locations (see also Additional file 1). The Boye-catchment (not influenced by non-indigenous species) is shown in detail Top right: Overview map indicating the position of the study area in the western part of GermanyBack to article page