California annual rangelands are some of the most highly invaded systems in the world. The widespread invasion of these systems, by a multitude of invasive plant species, has led to significant losses in multiple economic and ecological benefits. In order to assess if rangland seeding can enhance multiple ecosystem services in heavily invaded rangeland plant communities, we conducted an 11 year study to investigate long-term management outcomes of seeding of annuals, natives, and non-native perennial forage species, including (1) occurrence of three dominant invasive plants�Medusahead (Taeniatherum caput-medusae), jointed goatgrass (Aegilops cylindrica), and yellow starthistle (Centaurea solstitialis); and (2) response of species diversity and native richness. We used a randomized complete block design with four blocks and five seeding treatments per block. We found differences in the responses of multiple ecosystem service metrics across seeding treatments and controls. For example, exotic perennial and mixed exotic-native perennial seeding treatments provided more resistance to invasion of�C. solstitialis�than the annual, native perennial, or control groups. All seeding treatments were resistant to�T. caput-medusae�while, contrastingly, all treatments provided little resistance to�A. cylindrica. We observed greater diversity in native and mixed seeding treatments relative to controls, and greater establishment of native species over the course of the study. The findings of this study will be beneficial to support land manager decision making and goal setting.
Oral presentation and poster titles, abstracts, and authors from the Society for Range Management (SRM) Annual Meetings and Tradeshows, from 2013 forward.