Phragmites australis is a highly invasive wetland grass species that dominates nearly any ecosystem that it invades, this is due to its incredibly dense foliage which makes it hard for plants and animals to live in the vicinity of phragmites. Phragmites can grow in versatile environments and are extremely durable. Therefore, once phragmites establish itself, it is very difficult to remove it. On top of that, Phragmites spreads very quickly by utilizing both sexual and asexual reproduction.
Saltz, Daniel L. and Dudle, Dana PhD, "Born to run? Vegetative spread of the invasive plant Phragmites australis via stolons (runners)" (2021). Annual Student Research Poster Session. 78.