Search Results - "Fredrickson, E.L."

Managing livestock using animal behavior: mixed-species stocking and flerds by Anderson, D. M., Fredrickson, E. L., Estell, R. E.

“…Mixed-species stocking can foster sound landscape management while offering economic and ecological advantages compared with mono-species stocking. Producers…”
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Mesquite recruitment in the Chihuahuan Desert: Historic and prehistoric patterns with long-term impacts by Fredrickson, E.L., Estell, R.E., Laliberte, A., Anderson, D.M.

“…Mesquite ( Prosopis glandulosa) has increased in dominance over large areas of the Chihuahuan Desert, chiefly at the expense of once expansive desert…”
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Effects of eugenol, α-terpineol, terpin-4-ol, and methyl eugenol on consumption of alfalfa pellets by sheep by Estell, R.E., Fredrickson, E.L., Anderson, D.M., Remmenga, M.D.

“…Many secondary compounds are typically present in unpalatable shrubs on arid and semi-arid rangelands. However, the relationship between intake by livestock…”
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Loss of phenolic compounds from leaf litter of creosotebush [ Larrea tridentata (Sess. & Moc. ex DC.) Cov.] and tarbush ( Flourensia cernua DC.) by Hyder, P.W., Fredrickson, E.L., Estell, R.E., Lucero, M.E., Remmenga, M.D.

“…We examined loss of organic matter (OM) and phenolics from leaf litter of two shrubs that are invasive in the Chihuahuan Desert. Fiberglass bags (1-mm mesh)…”
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Effect of previous exposure of sheep to monoterpene odors on intake of alfalfa pellets treated with camphor or α-pinene by Estell, R.E., Fredrickson, E.L., Anderson, D.M., Havstad, K.M., Remmenga, M.D.

“…Lambs were subjected to odors of two monoterpenes (camphor and α-pinene) that decreased intake in a previous study to determine if exposure during feeding…”
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Foraging behavior of Raramuri Criollo vs. commercial crossbred cows on rangelands of the southwestern United States and Northern Mexico by Roacho Estrada, O., Rodríguez Almeida, F.A., Utsumi, S.A., Fredrickson, E.L., Bezanilla Enríquez, G.A., Cibils, A.F., Estell, R.E., Gonzalez, A.L.

“…Matching livestock genetics to climatically variable and nutritionally challenging environments is critical to the success of livestock ranching in the…”
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Increasing Shrub Use by Livestock in a World with Less Grass by Estell, R. E., Havstad, K. M., Cibils, A. F., Fredrickson, E. L., Anderson, D. M., Schrader, T. S., James, D. K.

“…Much of the world's rangeland is dominated by woody species. Competing land uses and continued encroachment of woody species into non–woody-dominated…”
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Disentangling Complex Landscapes: New Insights into Arid and Semiarid System Dynamics by PETERS, DEBRA P. C, BESTELMEYER, BRANDON T, HERRICK, JEFFREY E, FREDRICKSON, ED L, MONGER, H. CURTIS, HAVSTAD, KRIS M

“…Although desertification is a global phenomenon and numerous studies have provided information on dynamics at specific sites, spatial and temporal variations…”
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The effect of feeding ewe lambs a 15% tarbush (Flourensia cernua DC) pellet pre- and post-weaning on the subsequent diet selection of tarbush by Fredrickson, E.L, Estell, R.E, Havstad, K.M, Shupe, W.L, Murray, L.W

“…The shrub Flourensia cernua (tarbush) has rapidly increased in dominance within Chihuahuan Desert grasslands, and is comparable to alfalfa in nutrient content…”
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An object-based image analysis approach for determining fractional cover of senescent and green vegetation with digital plot photography by Laliberte, A.S., Rango, A., Herrick, J.E., Fredrickson, Ed L., Burkett, L.

“…Research into automatic image processing of digital plot photography has increased in recent years. However, in most studies only overall vegetation cover is…”
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Laser-induced fluorescence (LIF) spectra of herbaceous and woody pre- and post-digested plant material by Anderson, D.M., Fredrickson, E.L., Nachman, P., Estell, R.E., Havstad, K.M., Murray, L.W.

“…Filtrate from pre- and post-digested plant material was exposed to 355-nm pulsed laser light and the subsequent laser-induced fluorescence (LIF) was recorded…”
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The potential of laser-induced fluorescence (LIF) spectra of sheep feces to determine diet botanical composition by Anderson, D.M., Nachman, P., Estell, R.E., Ruekgauer, T., Havstad, K.M., Fredrickson, E.L., Murray, L.W.

“…Laser-induced fluorescence (LIF) peaks near 470 nm (‘blue’) and 650 nm (‘red’) from sheep feces treated with chloroform (CHCl 3) displayed spectral signatures…”
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Distribution and concentration of total phenolics, condensed tannins, and nordihydroguaiaretic acid (NDGA) in creosotebush ( Larrea tridentata) by Hyder, Paul W, Fredrickson, E.L, Estell, Rick E, Tellez, Mario, Gibbens, Robert P

“…This paper focuses on the presence and distribution of secondary phenolic compounds found within creosotebush [ Larrea tridentata (Sess. & Moc. ex DC.) Cov.]…”
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Introduction to special issue—Landscape linkages and cross-scale interactions in arid and semi-arid ecosystems by Estell, R.E., Fredrickson, E.L., Peters, D.P.C.

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Volatile composition of Gutierrezia sarothrae (broom snakeweed) as determined by steam distillation and solid phase microextraction by Lucero, M.E, Fredrickson, E.L, Estell, R.E, Morrison, A.A, Richman, D.B

“…Volatiles of Gutierezia sarothrae (broom snakeweed, snakeweed) were isolated from ground, composite tissues by steam distillation and by solid phase…”
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Potential toxicity and feed value of onions for sheep by Fredrickson, E.L., Estell, R.E., Havstad, K.M., Shupe, W.L., Murray, L.W.

“…The feeding, ruminal effects and potential toxicity of cull onions bulbs ( Allium cepa) was compared to whole sorghum grain for growing wethers. In Expt. 1, 56…”
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Use of Fluorometry to Differentiate Among Clipped Species in the Genera Astragalus, Oxytropis, and Pleuraphis by Anderson, Dean M., Rayson, Gary D., Obeidat, Safwan M., Ralphs, Michael, Estell, Rick, Fredrickson, Ed L., Parker, Eric, Gray, Perry

“…A rapid and reproducible method to determine botanical composition of forage is an ecological and economic goal for range animal ecologists. Multidimensional…”
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essential oil composition of Psorothamnus scoparius (A. Gray) Rydb by Lucero, M.E, Estell, R.E, Fredrickson, E.L

“…Psorothamnus scoparius (broom dalea) was collected from the Jornada Experimental Range in south central New Mexico. Current year's growth was collected from 10…”
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Effects of volatile compounds on consumption of alfalfa pellets by sheep by Estell, R.E, Fredrickson, E.L, Tellez, M.R, Havstad, K.M, Shupe, W.L, Anderson, D.M, Remmenga, M.D

“…We examined the effects of six volatile compounds on alfalfa pellet consumption by lambs. In each experiment, 45 lambs were individually fed alfalfa pellets…”
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Essential oil of Flourensia cernua DC by Tellez, M.R, Estell, R.E, Fredrickson, E.L, Havstad, K.M

“…The leaf oil of Flourensia cernua DC. collected from the Jornada Experimental Range in southcentral New Mexico was analyzed. GC/MS and retention indices were…”
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