Biological invasions represent one of the main contemporary pressures facing freshwater ecosystems, and a better understanding of invasive species potential distributions is essential to prepare for future stressors. Crustacean invaders contribute significantly to global invasions with the Ponto-Caspian region being one of the primary donor areas for the Palearctic. The amphipods Dikerogammarus villosus and Dikerogammarus haemobaphes, popularly known as “killer” and “demon” shrimps, are emblematic of successful Ponto-Caspian invaders of European freshwaters. However, the geographical areas in which the abiotic environment is potentially suitable for them have not been investigated. To address this gap, current and future potential distributions were studied for the European Western Palearctic considering two scenarios and time periods (2050 and 2070) as well as the association between anthropogenic activities and individual species habitat suitability. Results show large areas of central-western Europe are currently suitable for both species and indicate some potential for range expansion within colder European areas. In particular, D. haemobaphes has the potential to expand its range further west and within southern parts of Europe. Scenarios of future climate change don’t provide evidence for further range expansion compared to the current conditions and suggest a reduction of range overlap within the most suitable areas. Results reveal lowland areas are at greatest risk of colonisation as well as a significant association with anthropogenic activities for both amphipods. The outcomes of the research could be used by resource managers for preparing and managing future changes of both species distributions and facilitate decision-making for monitoring and control.

生物入侵是淡水生态系统面临的当代主要压力之一，更好地了解入侵物种的潜在分布对于为未来的压力源做好准备至关重要。甲壳类动物入侵者对全球入侵做出了重大贡献，Ponto-Caspian 地区是古北极的主要捐助区之一。片脚类 Dikerogammarus villosus和Dikerogammarus haemobaphes，通常被称为“杀手”和“恶魔”虾，是欧洲淡水成功的 Ponto-Caspian 入侵者的象征。然而，尚未研究非生物环境可能适合它们的地理区域。为了解决这一差距，考虑到两种情景和时间段（2050 年和 2070 年）以及人类活动与个体物种栖息地适宜性之间的关联，研究了欧洲西部古北极当前和未来的潜在分布。结果显示，中西欧的大片地区目前适合这两个物种，并表明在较冷的欧洲地区扩大范围的潜力。特别是D. haemobaphes有可能将其范围进一步扩大到欧洲西部和南部地区。与当前条件相比，未来气候变化的情景并未提供范围进一步扩大的证据，并表明最适宜区域内范围重叠的减少。结果表明，低地地区的殖民风险最大，并且与两种片脚类动物的人类活动密切相关。资源管理者可以使用研究结果来准备和管理两个物种分布的未来变化，并促进监测和控制的决策。