Skip to Main Content
The value of oak woodland habitats as control for medusahead (Taeniatherum caput-medusae)Author(s): Elise S. Gornish; Jeremy J. James; Emilio A. Laca
Source: Gen. Tech. Rep. PSW-GTR-251. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 131-143
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: Download Publication (359.0 KB)
DescriptionAlthough medusahead (Taeniatherum caput-medusae) is one of the most dominant invasive rangeland grasses in the West, we know surprisingly little about the environmental factors that drive medusahead abundance. Understanding the conditions that influence spread dynamics is central for developing effective monitoring, prevention and control programs. We established grassland plant communities and added medusahead seed across a range of five densities (from 0 to 50,000 seeds per m2) in open grassland and oak savannah habitat. We followed plants throughout the season to understand how habitat and seedbank dynamics affect underlying vital rates and overall density. Oak woodlands reduced medusahead abundance by almost 300 percent, and this effect was greater later in the growing season. The negative effect of oak woodlands was almost an order of magnitude less for common competitive annual species. We also found that reproductive spike production was lower in the oak habitat than the open habitat; and that seeding rate had a negative relationship with seed produced per spikelet. These effects ultimately contributed to a reduction in medusahead reproductive output between habitats, across seeding rates. This work highlights the value of oak woodland habitats as an effective and sustainable way to control medusahead density and recruitment.
- 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.
CitationGornish, Elise S.; James, Jeremy J.; Laca, Emilio A. 2015. The value of oak woodland habitats as control for medusahead (Taeniatherum caput-medusae). In: Standiford, Richard B.; Purcell, Kathryn L., tech. cords. Proceedings of the seventh California oak symposium: managing oak woodlands in a dynamic world. Gen. Tech. Rep. PSW-GTR-251. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 131-143.
Keywordsannual grass, conservation, grassland management, invasive plant, restoration
- First-year establishment, biomass and seed production of early vs. late seral natives in two medusahead (Taeniatherum caput-meducae) invaded soils
- Medusahead: Available soil N and microbial communities in native and invasive soils
- Medusahead response 6 years after burning and seeding in sagebrush steppe
XML: View XML