Dean E. Pearson, Teal Potter and John L. Maron Biotic resistance: exclusion of native rodent consumers releases populations of a weak invader Journal of Ecology 100
Tragopogon dubius occurs widely across North America as an exotic naturalized weed. Long-term rodent exclosures combined with seed addition experiments indicate that biotic resistance from rodent florivory and seed predation strongly suppress this weed. These results suggest that biotic resistance from native rodents may help to explain why this invader has not become a problematic invader.Tragopogon dubius can reach high densities in locations where herbivory and plant competition are reduced. Photo taken in Eastern Montana by Allison Lansverk.
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