Here is an interesting video about what to plant to provide the most ecosystem functions. It explains how invasive species can damage biodiversity, and how it can be restored by using native plants.
This video was produced by Douglas W. Tallamy, professor and chair of Entomology and Wildlife Ecology at the University of Delaware, and the author of Bringing Nature Home: How You Can Sustain Wildlife with Native Plants. Doug presents on the importance of diverse native ecosystems and the impact of non-natives on the food web.