Examples of issues addressed in the first German action plan on the pathways of invasive alien species A in or on humans or in their luggage (M20) B in ballast water of seagoing and inland ships (M13, M14) C in or on trains (along railway lines) (M21) D growth/accumulation on the hull of ships (M15, M16) E contamination of gravel (M10, M11) F unassisted dispersal along canals or waterways between river basins, lakes and seas (M22, M23, M24) G botanical gardens (M1, M2). M# means Measure number in Table 2. Photo credits: Tina Heger (D), Katharina Mayer (C, E), Stefan Nehring (A, B, F, G).