Invasion paradox

"...Disturbance facilitated initial invasion, creating a negative diversity–invasibility relationship when the invader first arrived. Over time, disturbance hindered the persistence of invaders, creating a positive diversity–invasibility relationship. We suggest that temporal changes in the
diversity–invasibility relationship may have contributed to the invasion paradox , a term for the contrasting patterns of experimental and observational studies of the diversity–invasibility relationship (more from the latest Ecology Letters)."