Invasion ecology of M. sinensis sinensis

Abstract

Invasive, exotic plant species can cause major damage in their introduced ranges. M. sinensis sinensis (Japanese silvergrass), an ornamental species, is currently listed as a potential invasive in the Mid-Atlantic and has been recently spreading into a variety of environments, including serpentine barrens. I tested three hypotheses to determine if crooksM. sinensis is affecting native plant communities and soil characteristics in both serpentine and non-serpentine sites. M. sinensis was associated with other exotic plant species, suggesting factors that allow M. sinensis to invade may be similar to those that facilitate invasion by others. Soil nitrogen concentrations were similar underneath and away from M. sinensis individuals indicating this species does not have unique effects on nitrogen availability. Finally, in a greenhouse experiment, M. sinensis significantly reduced the biomass of a native bunchgrass, demonstrating its strong competitive ability. I conclude that M. sinensis is a cause for concern.