Ecological Risk Screening Summary - Pontogammarus abbreviatus (an amphipod, no common name) - Uncertain Risk

Species that are considered uncertain risk need a more in-depth assessment beyond the Risk Summary to better define the species’ risk to U.S. environments.

Pontogammarus abbreviatus is an amphipod reported from the Delta Region of the Volga River where it empties into the Caspian Sea and the Caspian Sea. This species was reported to be introduced to the upper regions of the Volga River and the Ural River, but the extent of this introduced range is unclear and no information regarding impacts of this introduction were found. Little information is available for this species. The history of invasiveness is Data Deficient. The climate match for the contiguous United States was categorically High with the highest matches occurring in the western Rocky Mountains and the northern Great Lakes. The certainty of this assessment is Low due to a general lack of information and specifically regarding impacts of introduction. The overall risk assessment category for Pontogammarus abbreviatus is Uncertain.