Data from: Native freshwater species get out of the way: Prussian carp (Carassius gibelio) impacts both fish and benthic invertebrate communities in North America

Prussian Carp (Carassius gibelio) are one of the most noxious non-native species in Eurasia. Recently, Prussian Carp, a non-native freshwater fish species, were genetically confirmed in Alberta, Canada and have been rapidly expanding their range in North America since establishment. Given their rapid range expansion, there is an increasing need to determine how Prussian Carp may impact native species. We assessed the severity of the Prussian Carp invasion by 1) determining their impact on fish communities, 2) assessing their impact on benthic invertebrate communities, 3) evaluating if Prussian Carp alter abiotic conditions, and 4) identifying where we find higher abundances of Prussian Carp. When Prussian Carp were established, we found significant changes to the fish community. Correspondingly, the degree of impact to benthic invertebrate communities was related to the stage of invasion (none, early, or recent), where changes in fish communities were significantly concordant with changes in benthic invertebrate communities. Finally, we found that higher abundances of Prussian Carp were significantly associated with lower abundances of a majority of native fish species. Altogether, using three lines of evidence, we determine that Prussian Carp can have wide ranging impacts on freshwater ecosystems in North America, pressing the need for management intervention.普氏鲤（Prussian Carp，Carassius gibelio）是欧亚大陆危害最为严重的外来入侵物种之一。近期，这一外来淡水鱼类在加拿大阿尔伯塔省经基因鉴定确认存在，且自成功定植以来，其分布范围已在北美地区快速扩张。鉴于其扩散速度极快，学界对评估普氏鲤对本土物种的潜在生态影响的需求日益迫切。本研究通过四项研究内容评估了普氏鲤入侵的严重程度：1）明确其对鱼类群落的影响；2）评估其对底栖无脊椎动物群落的影响；3）探究普氏鲤是否会改变非生物环境条件；4）确定普氏鲤种群丰度较高的区域。研究结果显示，普氏鲤完成定植的区域，其本土鱼类群落已发生显著改变。相应地，底栖无脊椎动物群落所受影响的程度与入侵阶段（未入侵、早期入侵或近期入侵）显著相关，且鱼类群落的变化与底栖无脊椎动物群落的变化呈现高度一致性。最后，我们发现普氏鲤种群丰度较高的区域，绝大多数本土鱼类物种的丰度均显著降低。综上，本研究通过三项独立证据链证实，普氏鲤可对北美淡水生态系统造成广泛且深远的影响，因此亟需开展针对性的管理干预工作。