Litter, gap size and propagule pressure control grassland invasibility

Eckstein RL, Ruch D, Otte A, Donath TW (2012) Invasibility of a Nutrient-Poor Pasture through Resident and Non-Resident Herbs Is Controlled by Litter, Gap Size and Propagule Pressure. PLoS ONE 7(7): e41887. doi:10.1371/journal.pone.0041887