Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.
Dikerogammarus haemobaphes has expanded its range through several European countries in recent decades. In some areas, the species has displaced native amphipods and a recent study from Great Britain showed potential for D. haemobaphes invasion to influence leaf litter breakdown and nutrient cycling in streams. Climate match to the contiguous U.S. is medium, with highest climate match occurring in the Great Lakes region. Overall risk for this species is high.
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High Risk
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