Your search for keyword(s) "range condition" resulted in 13 record(s).

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Title: An ecological economic simulation model for assessing fire and grazing management effects on mesquite rangelands in Texas: Journal: Ecological Economics; Authors: W. R. Teague, W. E. Grant, U. P. Kreuter, H. Diaz-Solis, S. Dube, M. M. Kothman, W. E. Pinchak, and R. J. Ansley; Date: 2008; Summary: Simulation model (Simple Ecological Sustainability Simulator- SESS) representing a hypothetical 100ha ranch in northern Mexico, southern TX, was used to determine ecological and economic consequences of land management in which summer fire was applied regularly over 30 years to control mesquite. Model was to reflect biological and economic implications of varying stocking levels and strategies, fire types and frequencies, and various rainfall, soil composition, topography and species composition factors. Model data was compared with grazing experiment data from 8 ranch-size management units (1 ...; Agrovoc Control Words: Fire strategy, Rangeland management, Sustainability; View more details about this article

Title: Grassland bird densities in seral stages of mixed-grass prairie: Journal: Rangeland Ecology & Management; Authors: S. C. Fritcher, M. A. Rumble, and L. D. Flake; Date: 2004; Summary: Grassland bird density, species diversity and species richness within four seral stages (early, early-intermediate, late-intermediate and late) in South Dakota were studied for two years. Bird counts were conducted twice for four hours around sunrise beginning May 15 and ending June 30 at each study site. Vegetation measurements were taken during the same time as the bird counts. Additional vegetation composition was measured during July and August. ...; Agrovoc Control Words: Ecological succession, Rangelands, Birds; View more details about this article

Title: Moderate and light cattle grazing effects on Chihuahuan Desert rangelands: Journal: Journal of Range Management; Authors: J. Holechek, D. Galt, J. Joseph, J. Navarro, G. Kumalo, F. Molinar, and M. Thomas; Date: 2003; Summary: Range condition, vegetation production, composition, and cover were compared between lightly and moderately grazed rangelands in the Chihuahuan Desert in southwestern New Mexico to determine if these levels of utilization were sustainable in this area. Compared to light use, moderate use increased shrub cover and reduced total standing crop and cover of grasses, forbs, and black grama (Bouteloua eriopoda), an important grass species in this area. Over the 13 year study, the lightly grazed pasture increased in range condition, whereas range condition on the moderately use ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Ant communities and livestock grazing in the Great Basin, U.S.A.: Journal: Journal of Arid Environments; Authors: M. S. Nash, W. G. Whitford, D. F. Bradford, S. E. Franson, A. C. Neale, and D. T. Heggem; Date: 2001; Summary: The effects of livestock grazing on ant species composition and diversity at two desert locations (eastern Idaho and southwest Utah) in the Great Basin were evaluated for one year. At each location study sites were categorized as good, fair, or poor range condition. Ants were captured from May 14-31 in Utah and from June 8-24 in Idaho. Ants were identified to species or taxonomic unit and populations of ant groups were calculated. Plant species richness and bare ground cover were also measured. ...; Agrovoc Control Words: Grazing, Rangelands, Ants; View more details about this article

Title: Predicting plant species' responses to grazing: Journal: Journal of Applied Ecology; Authors: P. A. Vesk, and M. Westoby; Date: 2001; Summary: The consistency of plant species response to livestock grazing for the purpose of predicting vegetation dynamics and identifying plant functional types and traits was examined. Research and conclusions were formed by analyzing the results from 35 published studies from across Australia that examined data on species composition changes from grazing using a data set of 1,554 grazing responses from 829 species. This study examined two basic questions 1) what shared responses do species exhibit from grazing disturbance and 2) what are the central ranges of among-species variation to grazing distur ...; Agrovoc Control Words: Australia, Rangelands, Grazing intensity; View more details about this article

Title: Grazing influences on watering point vegetation in the Chihuahuan desert: Journal: Journal of Range Management; Authors: M. Fusco, J. Holechek, A. Tembo, A. Daniel, and M. Cardenas; Date: 1995; Summary: Standing crop and species composition were measured to determine how cattle grazing patterns affected vegetation around watering points in the Jornada Basin of New Mexico. One watering point was in a fair condition range with continuous grazing (with heavy grazing early and then a low stock rate implemented 11 years prior to study), The second watering point was in a good condition range with intensive management and a moderate or low stocking rate. Biomass was measured in April and then again in October of the two year study. ...; Agrovoc Control Words: Stocking rate, Rangelands, Grazing; View more details about this article

Title: South Florida flatwoods range vegetation responses to season of deferment from grazing: Journal: Journal of Range Management; Authors: R. S. Kalmbacher, F. G. Martin, W. D. Pitman, and G. W. Tanner; Date: 1994; Summary: Five exclosures were established in a frequently burned, infertile, wiregrass (Aristida stricta) dominated, flatwoods range in south Florida to evaluate range improvement by deferred grazing. There were no differences in plant biomass between treatments, except for the year-round exclosure having somewhat higher values of shrubs and preferred grasses relative to all other treatments. Frequency of the preferred grasses, little blue maidencane (Amphicarpum muhlenbergianum), chalky bluestem (Andropogon capillipes), little bluestem ( ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Composition and production of California oak savannah seasonally grazed by sheep: Journal: Journal of Range Management; Authors: J. W. Bartolome, and M. P. McClaren; Date: 1992; Summary: Selective grazing by some herbivores can alter pasture species composition, range condition and forage production within and between seasons. In this study, moderate sheep grazing in the fall-winter and spring-summer season, in the California annual grassland, was not selective between oak (Quercus douglasii) understory and open grasslands and did not alter species composition within or between years. Total cover and forb cover was reduced, while grass cover increased during the three year study. These changes were most likely due to changes in stocking rate and weather patterns among study ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Grazing effects and range trend assessment on California bighorn sheep range: Journal: Journal of Range Management; Authors: B. M. Wikeem, and M. D. Pitt; Date: 1991; Summary: Wikeem and Pitt determined utilization and vegetation responses of areas grazed by California bighorn sheep in British Columbia. Bighorn sheep diets consisted mostly of grasses. Although their diets contained an average of 79 different species, they selectively grazed certain preferred species and avoided others. Basal diameter and composition of some plants, including prairie junegrass and Sandberg's bluegrass, were reduced within the plant community due to preferential selective grazing. In contrast, non-preferred species, including big sagebrush and soft chess, increased due to bighorn ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Vegetation changes on a rest rotation grazing system: Journal: Rangelands; Authors: J. J. Yeo, W. T. Wittinger, and J. M. Peek; Date: 1990; Summary: Yeo et al. examined cattle grazing behavior and vegetation measurements to determine the effects of implementing a rest-rotation grazing system on federally owned grazing allotments in Idaho. Cattle preferred to graze in areas of relatively flat terrain that were close to water, on grasses and some shrub species. However, cattle rarely used upland areas, which were considered suitable for winter wildlife use. After the grazing system was implemented, composition and cover of preferred grass species were enhanced in areas most used by cattle, and range condition generally improved. The auth ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Vegetation and soil responses to short-duration grazing on fescue grasslands: Journal: Journal of Range Management; Authors: J. F. Dormaar, A. Smoliak, W. D. Willms; Date: 1989; Summary: Dormaar et al. test the claim that a short-duration grazing system can improve range condition, even under intense stocking rates, by using grazing exclosures in this 5-year Alberta study. In grazed plots, soil moisture and hydraulic conductivity were lower and bulk density was higher than in exclosures, indicating the negative effects of short-duration grazing on soil physical properties. Grazed areas also had lower C and N contents, lower soil polysaccharides of a microbial nature and less litter deposited into the soil than ungrazed areas. This indicates the negative effects of this manag ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

Title: Cattle, vegetation, and economic responses to grazing systems and grazing pressure: Journal: Journal of Range Management; Authors: R. H. Hart, M. J. Samuel, P. S. Test, and M. A. Smith; Date: 1988; Summary: Three grazing systems (season-long or continuous, deferred rotation, and short duration rotation) were compared on the mixed grass prairie 7 km northwest of Cheyenne, WY to determine the effect of rotation grazing on livestock production, the plant community and cover. All grazing systems were stocked moderately for the first three years. Stocking rate was then increased (moderate to heavy) over the last three years. All steers were weighed on the first grazing day, then biweekly until last day. Forage was clipped to ground level each year and data used to develop a regression equation to est ...; Agrovoc Control Words: Grazing systems, Rangelands, Stocking rate; View more details about this article

Title: Vegetation responses to long-term sheep grazing on mountain ranges: Journal: Journal of Range Management; Authors: J. E. Bowns, and C. F. Bagley; Date: 1986; Summary: The effects of long-term summer sheep grazing in southwestern Utah were measured in this study by comparing a sheep-grazed pasture to an ungrazed pasture (occasionally grazed by horses/cattle). The ungrazed pasture had greater species richness, biomass, and density of desirable species and forbs, while the grazed pasture was dominated by grasses and intermediate to less desirable species. However, both pastures produced similar amounts of Kentucky bluegrass (Poa pratensis), indicating that this grass species is not only an important forage resource for sheep, but also important in the natura ...; Agrovoc Control Words: Riparian zones, Rangelands, Wildlife; View more details about this article

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