Most invasive species spread much faster when a site is disturbed. However, they can still spread at undisturbed sites. Spread rates in undisturbed sites are primarily dependent on dispersal corridors.
Forest roads are excellent corridors for seed spread by vehicles and wind.
Trails can disperse seeds on hikers' boots, animal feet, and by water runoff.
Creeks and other waterways can spread seeds long distances to other low-lying areas.
