Giant Knotweed (IMAGE) Wiley Caption An invasive species from the Far East Sakhalin Island, which threatens biodiversity of natural habitats in Europe. Credit Milan Chytry Usage Restrictions Please credit the author. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.