WorldCat Identities

Anderson, Val Jo

Overview
Works: 7 works in 17 publications in 1 language and 638 library holdings
Genres: Academic theses 
Roles: Author
Classifications: SD404,
Publication Timeline
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Most widely held works by Val Jo Anderson
Competitive effects of bluebunch wheatgrass, crested wheatgrass, and cheatgrass on antelope bitterbrush seedling emergence and survival by Derek B Hall( )

3 editions published in 1999 in English and held by 464 WorldCat member libraries worldwide

"The competitive environment into which plant seedlings emerge often determines the survival and performance of these individuals. This study was designed to determine the effects of bluebunch wheatgrass (Pseudoroegneria spicata), crested wheatgrass (Agropyron cristatum), and cheatgrass (Bromus tectorum) on soil moisture depletion, associated antelope bitterbrush (Purshia tridentata) seedling emergence, xylem pressure potential, and subsequent survival. In the fall of 1992, antelope bitterbrush seed was sown into the following four established competitive matrices: (1) bluebunch wheatgrass, (2) crested wheatgrass, (3) cheatgrass, and (4) bare soil control plots. Soil moisture and bitterbrush seedling xylem pressure potential data were collected through the spring and summer of 1993. Antelope bitterbrush seedling survival data were collected through the spring and summer of 1993, and again in July 1994. Invasion of bur buttercup (Ranunculus testiculatus) in the spring of 1993 increased the competitive environments with densities of 470 plants per m2 in the crested wheatgrass, 760 in bluebunch wheatgrass, 920 in control and 1,060 in cheatgrass plots. Soil moisture in crested wheatgrass plots tended to be lower than soil moisture in the bluebunch wheatgrass plots. The number of emerged bitterbrush seedlings were significantly (r2 = 0.99) negatively correlated with the number of total annuals per m2. Antelope bitterbrush seedling xylem pressure potentials were less negative in the bluebunch wheatgrass plots compared with the other plots. Percent antelope bitterbrush seedling survival over 2 years was significantly higher (nearly twice) when grown in association with bluebunch wheatgrass than seedlings grown in association with crested wheatgrass, cheatgrass, or bur buttercup."
Chemical and mechanical control of false Hellebore (Veratrum californicum) in an alpine community by Val Jo Anderson( Book )

7 editions published in 1993 in English and held by 168 WorldCat member libraries worldwide

Species replacement in response to herbivory : influence of grazing history, competitive interactions and population structure by Val Jo Anderson( Book )

3 editions published in 1989 in English and held by 4 WorldCat member libraries worldwide

Although the concept of range condition classification has served as a basic tenant of range management in the United States for nearly 40 years, the mechanisms associated with species replacement have received remarkably little investigation. Two major viewpoints which address the causal mechanisms of species replacement are: (1) differential utilization among species based primarily on growth-form and (2) differential regrowth ability among species based on meristematic availability and physiological attributes. The potential mechanisms facilitating species composition changes in response to long-term herbivory were investigated in a series of three experiments within a transplant garden. The research approach involved the establishment of the climax dominant, Schizachyrium scoparium, into three neighborhoods (Schizachyrium scoparium, Bothriochloa saccharoides, and Stipa leucotricha) representing herbivore-induced species composition changes as herbaceous retrogression progresses in the southern true prairie. Disproportionate utilization of the climax dominant, as opposed to differential regrowth capabilities among species, was the predominate mechanism contributing to the replacement of the climax dominant by lower seral species. Intraspecific neighborhoods provided a more competitive environment for the climax dominant than neighborhoods of the two lower seral species indicating that the regrowth capability of the climax dominant equaled or exceeded that of the lower seral species which replace it under intensive herbivory. Climax dominants having a prior history of herbivory did not express significant architectural differences or increased competitive abilities in the presents of interspecific competition in comparison with plants without a history of herbivory. Tiller dispersion into a configuration represented by a large number of small plants did not increase production following defoliation in comparison to a similar number of tillers in fewer, larger plants. The mechanism inducing species replacement in the southern true prairie is largely under managerial control as it relates to the frequency, intensity and seasonality of herbivory
Response of native vegetation to three levels of sheep grazing in the Middle Atlas Region of Morocco. by Val Jo Anderson( )

1 edition published in 1985 in English and held by 1 WorldCat member library worldwide

"Into the burn!" by Val Jo Anderson( )

1 edition published in 2011 in English and held by 1 WorldCat member library worldwide

Competitive effects of bluebunch wheatgrass, crested wheatgrass, and cheatgrass on antelope bitterbrush seedling emergence and survival by Derek B Hall( Book )

1 edition published in 1999 in English and held by 0 WorldCat member libraries worldwide

Competitive effects of bluebunch wheatgrass, crested wheatgrass, and cheatgrass on antelope bitterbrush seedling emergence and survival by Derek B Hall( Book )

1 edition published in 1999 in English and held by 0 WorldCat member libraries worldwide

 
Audience Level
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Audience Level
1
  Kids General Special  
Audience level: 0.54 (from 0.51 for Competitiv ... to 1.00 for "Into the ...)

Languages
English (17)