Sea lampreys impact rivers for months, perhaps years, due to their disturbance of streambeds when they spawn, say University of Maine researchers. Robert Hogg, a master’s graduate who participated in the study, writes in a journal article that sea lampreys (Petromyzon marinus) are ecosystem engineers. The physical disturbance caused by their “nest-building activity was significant read more Spawning Sea Lampreys Amplify Streambed Diversity, Say UMaine Scientists