Vilà, M., Espinar, J. L., Hejda, M., Hulme, P. E., Jarošík, V., Maron, J. L., Pergl, J., Schaffner, U., Sun, Y. and Pyšek, P. (2011), Ecological impacts of invasive alien plants: a meta-analysis of their effects on species, communities and ecosystems. Ecology Letters, 14: 702–708. doi: 10.1111/j.1461-0248.2011.01628.x
Our Review: Parry H, Lonsdale M: 2011. F1000.com/13365971
Despite equal effort in surveying the literature on animal species and communities, one shortcoming is that this study doesn’t conclude similar future directions for animal research. Some interesting perspectives on the bias in the literature are also gained by such a study. Here, we see that there is a bias in plant research towards trees and shrubs, as well as to certain regions such as Australia. We cannot draw on a long history of research in this area as the studies are nearly all from the last ten years.
 Parker et al. Biol Invasions 1999, 1:3-19