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We investigated experimental warming and simulated grazing (clipping) effects on rangeland quality, as indicated by vegetation production and nutritive quality, in winter-grazed meadows and summer-grazed shrublands on the Tibetan Plateau, a rangeland system experiencing climatic and pastoral land use changes. Warming decreased total aboveground net primary productivity (ANPP) by 40 g.m?�.yr?� at the meadow habitats and decreased palatable ANPP (total ANPP minus non-palatable forb ANPP) by 10 g.m?�.yr?� at both habitats. The decreased production of the medicinal forb Gentiana straminea and the increased production of the non-palatable forb Stellera chamaejasme with warming also reduced rangeland quality. At the shrubland...
This study determined the influence differing soil surface textures and vegetative covers have on the magnitude of wind erosion in a semi-arid environment. The study was conducted from March 2000 through late April 2000 on the Jornada Experimental Range approximately 37 km north of Las Cruces, New Mexico. Big Spring Number Eight (BSNE) samplers placed at nine locations, collected particulates in suspension and saltation at heights of 5, 10, 20, 50, and 100 cm from the following surfaces: loose sand, thick silty physical crust, flaky physical crust, weak desert pavement, and a forb/grass ground cover. BSNE samplers collected the largest amounts of sediment were collected in areas of loose sand and at sites directly...
This review considers studies of short-duration grazing from the USA (prairie rangelands) and Africa. Topics discussed include the impact of trampling on soil compaction, effects on forage production, plant succession in relation to range condition, efficiency of forage utilization, livestock (cattle and sheep) productivity, and financial returns. It is concluded that most of the early claims for short-duration grazing, based on short-term studies during a climatically and financially favourable period, have not been sustained during subsequent droughts. Better results could have been obtained if the efforts of extension workers had been concentrated on promulgating scientifically-proven range management techniques...
Categories: Publication; Types: Citation, Journal Citation; Tags: Rangelands
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Foliage and litter leachate from selected natural vegetation in the Price River Basin (within the Upper Colorado River basin) was studied to determine the probable impact of plants on the amount of diffuse salt movement from rangeland watersheds. Calculations using concentrations of various leachates and characteristics of range sites expected to be high salt annual salt load to the Price River. It was therefore concluded that plants are not a significant source of diffuse salt within the Colorado River Basin. Published in Journal of the American Water Resources Association, volume 14, issue 1, on pages 195 - 205, in 1978.
Riparian zone management is receiving increased attention on all rangelands. These areas are important for protecting stream habitat and maintaining water quality. The riparian zones are important livestock grazing areas because of accessibility to succulent forage, gentle topography, availability of water, and generally abundant shade which provides temperature relief. Lack of stream-side vegetation exposes banks to erosion from rain or running surface water. Published in Rangelands, volume 11, issue 3, on pages 103 - 106, in 1989.
Categories: Publication; Types: Citation, Journal Citation; Tags: Rangelands
Abstract: (From: https://www.nrs.fs.fed.us/pubs/59158) Most regions of the United States are projected to experience a higher frequency of severe droughts and longer dry periods as a result of a warming climate. Even if current drought regimes remain unchanged, higher temperatures will interact with drought to exacerbate moisture limitation and water stress. Observations of regional-scale drought impacts and expectations of more frequent and severe droughts prompted a recent state-of-science synthesis (Vose et al. 2016). The current volume builds on that synthesis and provides region-specific management options for increasing resilience to drought for Alaska and Pacific Northwest, California, Hawai‘i and U.S.-Affiliated...
This section reviews new publications available about the art and science of rangeland management. Personal copies of these publications can be obtained by contacting the respective publishers or senior authors (addresses shown in parentheses). Suggestions are welcomed and encouraged for items to include in future issues of Browsing the Literature. Published in Rangelands, volume 31, issue 6, on pages 30 - 32, in 2009.
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Western U.S. rangelands have been quantified as six fractional cover (0-100%) components over the Landsat archive (1985-2018) at 30-m resolution, termed the “Back-in-Time” (BIT) dataset. Robust validation through space and time is needed to quantify product accuracy. We leverage field data observed concurrently with HRS imagery over multiple years and locations in the Western U.S. to dramatically expand the spatial extent and sample size of validation analysis relative to a direct comparison to field observations and to previous work. We compare HRS and BIT data in the corresponding space and time. Our objectives were to evaluate the temporal and spatio-temporal relationships between HRS and BIT data, and to compare...
Soil surface growths dominated by cyanobacteria and the lichen Collema in southeastern Utah are shown to be associated with greater tissue content of several bio-essential elements in two co-occurring seed plants (Festuca octoflora, Poaceae, and Mentzelia multiflora, Loasaceae). The elements N, P, K, Ca, Mg, and Fe were present in significantly greater concentrations in Festuca growing on soils heavily encrusted with cyanobacteria and cyanolichens than in plants on the same soil where foot traffic had destroyed the cryptobiotic crusts. With Mentzelia, N, Mg, and Fe were present in significantly greater concentrations in plants from sites with encrusted soil surfaces than on blow-sand sites. The cryptobiota appeared...
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These data were compiled for an assessment of rangeland ecosystem conditions of the Grand Canyon - Parashant National Monument. The approximately one-million-acre Grand Canyon-Parashant National Monument (PARA) is located in the northwest corner of Arizona and co-managed by the Bureau of Land Management (BLM) and National Park Service (NPS). This report is focused on the ca. 200,000 acres of NPS administered lands—one of the largest NPS units where livestock grazing is a permitted land-use activity. Many ecosystems in PARA are characterized by a low degree of resilience to improper grazing due to low and variable precipitation. PARA is marked by an extremely high degree of environmental heterogeneity, including...
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This data depicts range improvement projects (RIP) on BLM land in the Pinedale Field Office including type of project, located and date constructed or implemented. This data does not address condition of RIP. These projects are constructed with the objective of improving rangelands through the proper distribution of livestock.
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This data depicts range improvement projects (RIP) on BLM land in the Pinedale Field Office including type of project, located and date constructed or implemented. This data does not address condition of RIP. These projects are constructed with the objective of improving rangelands through the proper distribution of livestock.
Plants of four Great Basin grass species were grown from seed in two greenhouses at low (340 ? l l-1) and high (680 ? l l-1) CO2 concentration. In all four species, high CO2 promoted mean increases in the number of basal stems, leaf area, specific leaf weight and above-ground dry weight. High CO2 resulted in an increase in CO2 assimilation in two C3 grasses but not in a C4 grass, while all three species showed decreases in stomatal conductance. Mean increases of 60% in aboveground dry weight and 80% in water-use-efficiency are consistent with previously reported high CO2 effects on grasses. No consistent differential effects of high CO2 were observed when comparing annual vs perennial species. Global CO2 enrichment...
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We systematically surveyed federal and state wildlife biologists, hydrological specialists, non-profit organizations, and working groups focused on beaver or wetland restoration in the western U.S. We focused primarily on contacting land managers from states containing some portion of the Great Basin, although many of the projects described in surveys fell outside of this watershed. Some land managers suggested colleagues who might be interested in participating in our study and these individuals were added to our list of contacts. We also performed a literature search using Google Scholar. We included only articles that were focused on primary research performed in the arid or semi-arid western US. We compiled...
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Conclusions: Elk habitat selection ratios varied in response to road pattern. Regularly spaced roads negatively influenced habitat selection, whereas a clumped pattern supported larger blocks of road-free habitat. Road density threshold at which elk could still occur in high numbers: 1.5 km/km⊃2; Thresholds/Learnings: Road density threshold at which elk could still occur in high numbers: 1.5 km/km⊃2; Synopsis: This study tested 3 aspects of an elk road density model to determine patterns of elk behavior relative to road density and configuration. The study compared model predictions with observed values of elk habitat selection at varying levels of road density. It also compared the effect of different spatial...
We aim to create a user-friendly, online tool that will provide predictions about the upcoming year’s grassland and rangeland productivity for the southwestern U.S. This tool will allow land managers, policy makers, ranchers, scientists, and the general public to visualize and forecast grassland production for the upcoming season. The tool will integrate data from remote sensing, climate, and modeling techniques and, on a county-by-county scale, will provide updated forecasts every two weeks. This tool will have many uses, including for those who need to make decisions about wildlife, livestock, restoration, and fire.
Why Rangelands: The Central Valley of California, the surrounding foothills and the interior Coast Range include over 18 million acres of grassland. Most of this land is privately owned and managed for livestock production. Because grasslands are found in some of California’s fastest-growing counties, they are severely threatened by land conversion and development. In addition climate change stresses grasslands by potentially changing water availability and species distributions.Maintaining a ranching landscape can greatly support biodiversity conservation in the California Landscape Conservation Cooperative (LCC) region. In addition ranches generate multiple ecosystem services—defined as human benefits provided...
Categories: Data, Project; Tags: 2011, 2012, 2013, Applications and Tools, CA, All tags...
Science is frequently touted as the solution to dryland management problems, yet most management decisions are, by necessity, based primarily on expert knowledge and experience. This paper describes an integrated framework for organizing, synthesizing, and applying our growing understanding of aridland ecosystems using a flexible, multi-objective assessment, monitoring, and management approach. The framework is dual-purpose: (1) to coordinate the use of existing tools, resources, and diffuse knowledge, and (2) to facilitate the integration and application of new knowledge as it is developed. In particular, this framework must facilitate the integration of new knowledge about linkages among landscape units across...
One of the challenges of range management is to compare one system of management with another with regard to their response to a different natural or management-induced factor. Drought and grasshoppers were dominant influences on rangelands of the southwest in the late 1980s. Drought has long been recognized as a good test of a grazing system as drought tends to magnify any weakness of management practice. The drought and subsequent grasshopper invasion of 1988 through 1990 provided a good opportunity to stress test two different grazing systems of the Arizona Strip. The two allotments examined in this paper are adjacent to each other, have similar range sites, and similar precipitation. Two major range sites occur...
    map background search result map search result map Range Improvement Projects for the BLM Pinedale Field Office, Wyoming Natural vegetation as a source of diffuse salt within the Colorado River Basin Range Improvement projects on BLM land in the Pinedale Wyoming Field Office at 1:24,000 Elk distribution and modeling in relation to roads Beaver-related Stream Restoration Projects in Western Rangelands Rangeland Ecosystem Data, Grand Canyon - Parashant National Monument, AZ, USA Temporal and Spatio-Temporal High-Resolution Satellite Data for the Validation of a Landsat Time-Series of Fractional Component Cover Across Western United States (U.S.) Rangelands Elk distribution and modeling in relation to roads Rangeland Ecosystem Data, Grand Canyon - Parashant National Monument, AZ, USA Range Improvement Projects for the BLM Pinedale Field Office, Wyoming Range Improvement projects on BLM land in the Pinedale Wyoming Field Office at 1:24,000 Natural vegetation as a source of diffuse salt within the Colorado River Basin Temporal and Spatio-Temporal High-Resolution Satellite Data for the Validation of a Landsat Time-Series of Fractional Component Cover Across Western United States (U.S.) Rangelands Beaver-related Stream Restoration Projects in Western Rangelands