Jay P. Angerer

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Pastoral livestock production is considered a pillar of the Mongolian economy. Since the early 1990's, Mongolia has transitioned to a market economy, and livestock numbers have trended upward. Recent remote sensing studies have indicated widespread overgrazing; however, to date, no studies have examined grazing pressure on a national scale to assess the(More)
The high-performance liquid chromatographic method with UV detection described below permits the selective determination of traces of palladium in human urine. After UV photolysis, during which the complete organic matrix was destroyed, the palladium was selectively enriched by solid-phase extraction (SPE). The reversed-phase C18 SPE column material was(More)
  • J Angerer
  • 1985
The development of biological monitoring for persons exposed to organic solvents is described. The advantages of this supervision strategy, as well as the reservation against it, are discussed. With the target organs of organic solvents, matrices and parameters for biological monitoring taken into consideration, the following recommendations can be given:(More)
Mongolia has one of the strongest climate warming signals on Earth, and over 40% of the human population depends directly or indirectly on pastoral livestock production for their livelihoods. Thus, climate-driven changes in rangeland production will likely have a major effect on pastoral livelihoods. We examined patterns of climate change and rangeland(More)
In North America, it has been shown that cattle in warmer, drier grasslands have lower quality diets than those cattle grazing cooler, wetter grasslands, which suggests warming will increase nutritional stress and reduce weight gain. Yet, little is known about how the plant species that comprise cattle diets change across these gradients and whether these(More)
Woody plant encroachment—the conversion of grasslands to woodlands—is among the greatest challenges faced by rangelands worldwide. Yet this phenomenon is poorly understood, and complex land use dynamics make interpreting the timing and extent of land cover changes a global challenge. For many regions, the true degree and rate of historical change in woody(More)
After the transition of Mongolia's agriculture sector to a market economy in the early 1990's, community-based rangeland management (CBRM) organizations have been established across Mongolia to cooperatively manage rangeland resources. We hypothesized that rangeland ecoregions under CBRM would have greater biomass than ecoregions managed using traditional(More)
Near-infrared reflectance spectroscopy of fecal samples from crossbred beef cows grazing native range forage was performed to determine whether supplemental feeding would alter the prediction of forage quality. In one trial, 2.27 kg.cow-1 x d-1 of supplemental feed with 20% CP and 3.3 Mcal of DE/kg had a detectable, but unimportant, effect on the predicted(More)
  • Robin S. Reid, Chantsallkham Jamsranjav, +5 authors Tungalag Ulambayar
  • 2015
Since the 1990's, herding communities across Mongolia have established over 2000 community-based rangeland management (CBRM) organizations to improve livestock grazing management and reverse perceived declines in rangeland (grassland) productivity. Here, we compare the vegetation and soils of rangelands managed by these formal community-based herder groups(More)
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