Established native perennial grasses out-compete an invasive annual grass regardless of soil water and nutrient availabilityAuthor(s): Christopher M. McGlone; Carolyn Hull Sieg; Thomas E. Kolb; Ty Nietupsky
Source: Plant Ecology. 213(3): 445-457.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
View PDF (441.0 KB)
DescriptionCompetition and resource availability influence invasions into native perennial grasslands by nonnative annual grasses such as Bromus tectorum. In two greenhouse experiments we examined the influence of competition, water availability, and elevated nitrogen (N) and phosphorus (P) availability on growth and reproduction of the invasive annual grass B. tectorum and two native perennial grasses (Elymus elymoides, Pascopyrum smithii). Bromus tectorum aboveground biomass and seed production were significantly reduced when grown with one or more established native perennial grasses. Conversely, average seed weight and germination were significantly lower in the B. tectorum monoculture than in competition native perennial grasses. Intraspecific competition reduced per-plant production of both established native grasses, whereas interspecific competition from B. tectorum increased production. Established native perennial grasses were highly competitive against B. tectorum, regardless of water, N, or P availability. Bromus tectorum reproductive potential (viable seed production) was not significantly influenced by any experimental manipulation, except for competition with P. smithii. In all cases, B. tectorum per-plant production of viable seeds exceeded parental replacement. Our results show that established plants of Elymus elymoides and Pascopyrum smithii compete successfully against B. tectorum over a wide range of soil resource availability.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
McGlone, Christopher M.; Sieg, Carolyn Hull; Kolb, Thomas E.; Nietupsky, Ty. 2012. Established native perennial grasses out-compete an invasive annual grass regardless of soil water and nutrient availability. Plant Ecology. 213(3): 445-457.
KeywordsBromus tectorum, competition, greenhouse, nitrogen, phosphorus, water availability
- Exotic cheatgrass and loss of soil biota decrease the performance of a native grass
- Invasion resistance and persistence: established plants win, even with disturbance and high propagule pressure
- Cheatgrass die-offs as an opportunity for restoration in the Great Basin, USA: Will local or commercial native plants succeed where exotic invaders fail?
XML: View XML