Friends of Skagit Beaches 2018 Lecture Series Biological Invasions: How Species Become Invasive Please join us for the first of our 2018 Lecture Series! Hear about how the success, impacts, and long-term effects of introduced populations determine whether or not they become invasive species. Dr. Emily Grayson , PhD, Univ. of Washington, Washington Sea Grant, will illustrate these potentially environment changing processes with real-time examples.