Screening level model for ecological risk assessment at EF-Site Los Alamos National Laboratory, New Mexico. Final report

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In response to a paucity of data on the chemical toxicity of uranium to plants, a factorial experiment employing five uranium concentrations (0, 50, 500, 5000, 25000 ppm) and three moisture regimes (low, medium, high) was performed using three native grasses. Buchloe dactyloides (buffalograss-mid/late seral), Schizachyrium scoparium (little bluestem-late seral), and Aristida longiseta (purple threeawn-early/mid seral) were grown in monocultures and every mixture of two species under all combinations of uranium and moisture levels. This design allows for the analysis of uranium effects, as well as possible compound effects due to moisture stress. Several measures of plant health and viability ... continued below

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82 p.

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Alldredge, A.W.; Kirchner, T.B. & McLendon, T. December 1, 1995.

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In response to a paucity of data on the chemical toxicity of uranium to plants, a factorial experiment employing five uranium concentrations (0, 50, 500, 5000, 25000 ppm) and three moisture regimes (low, medium, high) was performed using three native grasses. Buchloe dactyloides (buffalograss-mid/late seral), Schizachyrium scoparium (little bluestem-late seral), and Aristida longiseta (purple threeawn-early/mid seral) were grown in monocultures and every mixture of two species under all combinations of uranium and moisture levels. This design allows for the analysis of uranium effects, as well as possible compound effects due to moisture stress. Several measures of plant health and viability were made, including: percent emergence, survivability of seedlings and mature plants, root and shoot biomass, and the number and mass of inflorescences. No significant differences between uranium levels were observed in terms of emergence and seedling survival. Effects are evident for plant biomass, fecundity, and long-term survivability.

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82 p.

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INIS; OSTI as DE96009517

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  • Other Information: PBD: Dec 1995

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  • Other: DE96009517
  • Report No.: LA-SUB--96-9
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/219482 | External Link
  • Office of Scientific & Technical Information Report Number: 219482
  • Archival Resource Key: ark:/67531/metadc669341

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  • December 1, 1995

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  • June 29, 2015, 9:42 p.m.

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Alldredge, A.W.; Kirchner, T.B. & McLendon, T. Screening level model for ecological risk assessment at EF-Site Los Alamos National Laboratory, New Mexico. Final report, report, December 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc669341/: accessed August 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.