Coastal communities across the country need to be concerned about aquatic invasive plants as well as animals. But preventing their spread and growth brings unique challenges depending on the area. 
One such example would be in Delaware and other Atlantic coastal communities where salt water contamination of fields can allow invasive species to move in. 
“Once salt water kills off farmland, it makes a great opportunity for invasive plants like phragmites to move in, said Gallagher, an expert in salt-tolerant plants called halophytes and co-director of the university’s Halophyte Biotechnology Center.”
Read more at the article linked above to see how a native plant might provide a buffer to prevent the invasive species’ spread.