Factors Influencing Broadcast Seeding in Bunchgrass Range

Nelson, Jack R.; Wilson, A. D.; Goebel, Carl J.

doi:10.2307/3896379

Cited by 55 publications

(45 citation statements)

References 14 publications

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“…Grasses can be effectively and selectively controlled through the use of grassspecific herbicides, and indeed have been controlled in this way while apparently not killing native forbs in both sagebrush-grass steppe in the Great-Basin (Nelson et al 1970;Cox and Anderson 2004) and CSS in southern California (Cione et al 2002;Allen et al 2005). When grasses are controlled, however, the expansion of exotic forbs, including Erodium spp., may limit the ability of native species to occupy the site.…”

Section: Discussionmentioning

confidence: 99%

The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland

Cox

Allen

2011

Plant Ecol

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Many semi-arid shrublands in the western US have experienced invasion by a suite of exotic grasses and forbs that have altered community structure and function. The effect of the exotic grasses in this area has been studied, but little is known about how exotic forbs influence the plant community. A 3-year experiment in southern California coastal sage scrub (CSS) now dominated by exotic grasses was done to investigate the influence of both exotic grasses (mainly Bromus spp.) and exotic forbs (mainly Erodium spp.) on a restoration seeding (9 species, including grasses, forbs, and shrubs). Experimental plots were weeded to remove one, both, or neither group of exotic species and seeded at a high rate with a mix of native species. Abundance of all species varied with precipitation levels, but seeded species established best when both groups of exotic species were removed. The removal of exotic grasses resulted in an increase in exotic and native forb cover, while removal of exotic forbs led to an increase in exotic grass cover and, at least in one year, a decrease in native forb cover. In former CSS now converted to exotic annual grassland, a competitive hierarchy between exotic grasses and forbs may prevent native forbs from more fully occupying the habitat when either group of exotics is removed. This apparent competitive hierarchy may interact with yearly variation in precipitation levels to limit restoration seedings of CSS/exotic grassland communities. Therefore, management of CSS and exotic grassland in southern California and similar areas must consider control of both exotic grasses and forbs when restoration is attempted.

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Section: Discussionmentioning

confidence: 99%

The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland

Cox

Allen

2011

Plant Ecol

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“…However, once perennial native species are reestablished in a system, exotic annual species often diminish (Nelson et al 1970, Campbell and Swain 1973, Hironaka and Sindelar 1973, Monsen and McArthur 1995 plant-dominated sites prior to seeding of native species. The objective of this study was to investigate the feasibility of using crested wheatgrass (Agropyron cristatum [L.] Gaertner) to move a site from annual -plant to perennial -plant domination, followed by niche opening and reinsertion of species native to the predisturbance plant community.…”

Section: Introductionmentioning

confidence: 99%

“…Los zacates nativos y los arbustos emergieron en mayor número en los tratamientos establecidos en el área con "Crested wheatgrass" que los establecidos en el área con solo "Cheatgrass ". Quizás en general, pero especialmente en años con precipitación normal o abajo del promedio, la "sucesión asistida" probo ser exitosa en la restauración de la estepa de pastizal "Sagebrush ".However, once perennial native species are reestablished in a system, exotic annual species often diminish (Nelson et al 1970, Campbell and Swain 1973, Hironaka and Sindelar 1973, Monsen and McArthur 1995 plant-dominated sites prior to seeding of native species. The objective of this study was to investigate the feasibility of using crested wheatgrass (Agropyron cristatum [L.] Gaertner) to move a site from annual -plant to perennial -plant domination, followed by niche opening and reinsertion of species native to the predisturbance plant community.…”

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confidence: 99%

Increasing native diversity of cheatgrass-dominated rangeland through assisted succession

Cox¹,

Anderson²

2004

REM

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Increasing attention, resources and efforts are being focused on the conversion of weedy dominated rangelands back to perennial plant communities that resemble predisturbance communities in form, function and composition. A study was conducted in 1998 and replicated again in 1999 to determine whether native plants could be established through "assisted succession" -manipulating a cheatgrass-dominated area to perennial plant domination, then to native or near -native diversity. Cheatgrass dominated rangeland that had been successfully revegetated with crested wheatgrass (Agropyron cristatum [L.] Gaertner) was seeded with native species. Another area dominated by cheatgrass, but without crested wheatgrass, was also seeded. Four seedbed preparation methods were investigated: tilling, harrowing, application of a herbicide, and no treatment. Four different seeding methods were used in the 2 areas and 4 seedbed preparation techniques: drilling, broadcasting, a broadcast -cover method, and no seed. Seeding was done in February, and data were collected in mid -summer each year. Native grasses and shrubs emerged in greater numbers on treatments established on the crested wheatgrass matrix than on those established on the cheatgrass matrix. Perhaps in general, but especially in years with normal or below average precipitation, the assisted succession approach proved successful for restoration of native sagebrush-grassland steppe from cheatgrass range.Key Words: cheatgrass, crested wheatgrass, rangeland reseeding, restoration, sagebrush-steppe Natural succession has been suggested as a model for restoration and management of disturbed plant communities (Luken 1990, Hironaka 1994, Jones 1997, 1998, Brown and Amacher 1999. In wildland restoration, 3 basic components of succession may be used to determine the suitability of land for intervention: site availability, species availability, and species performance (Rosenberg and Freedman 1984, Pickett et al. 1987, Luken 1990, Sheley et al. 1996. Each of these may be initiated, modified, or curtailed by restorationists with the aim of affecting the trajectory of succession.The difficulty of seeding native species directly into areas dominated by cheatgrass (Bromus tectorum L.) and other exotic annuals is well documented (Campbell and Swain 1973, Pellant 1990, Allen 1995, Beckstead et al. 1995, Monsen and McArthur 1995 nar si las plantas nativas pudieran ser establecidas a través de "sucesión asistida ", esto es, manipulando un área dominada por "Cheatgrass" para que dominen las plantas perennes y alcanzar una diversidad igual o cercana a la original. Un pastizal dominado por "Cheatgrass" que había sido revegetado exitosamente con "Crested wheatgrass" (Agropyron cristatum [L.] Gaertner) se sembró con especies nativas. Otra área dominada por "Cheatgrass "pero sin "Crested wheatgrass" también fue sembrada. Se investigaron cuatro métodos de preparación de la cama de siembra: Labranza, barbecho, aplicación de un herbicida y no tratamiento. En las dos áreas se usaron cuatro méto...

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“…Seeding is commonly used for restoring depleted vegetation. Many seeding projects fail because rodents eat the seeds (Bramble and Sharp 1949, Spencer 1954, Nelson et al 1970. A variety of techniques for reducing the impact of rodents have been tested, but few have been successful.…”

Section: Discussionmentioning

confidence: 99%

Management of amphibians, reptiles, and small mammals in North America: Proceedings of the symposium

Szaro¹,

Severson²,

Patton³

1988

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Factors Influencing Broadcast Seeding in Bunchgrass Range

Cited by 55 publications

References 14 publications

The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland

The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland

Increasing native diversity of cheatgrass-dominated rangeland through assisted succession

Management of amphibians, reptiles, and small mammals in North America: Proceedings of the symposium

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