Research and Publications
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Abstracts of recent papers on climate change and land management in the West. Prepared by Louisa Evers, Science Liaison and Climate Change Coordinator, Bureau of Land Management, Oregon-Washington State Office.
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This study monitored the habitat-use patterns of 71 radio-marked sage-grouse inhabiting an area affected by wildfire in the Virginia Mountains of northwestern Nevada during 2009–2011 to determine the effect of micro-habitat attributes on reproductive success. Sage-grouse selected micro-sites with greater shrub canopy cover and less cheatgrass (Bromus tectorum) cover than random sites. Total shrub canopy, including sagebrush (Artemisia spp.) and other shrub species, at small spatial scales (0.8 ha and 3.1 ha) was the single contributing selection factor to higher nest survival. These results indicate that reducing the risk of wildfire to maintain important sagebrush habitats could be emphasized in sage-grouse conservation strategies in Nevada. Managers may seek to mitigate the influx of annual grass invasion by preserving large intact sagebrush-dominated stands with a mixture of other shrub species. For this area of Nevada, the results suggest that ≥40% total shrub canopy cover in sage-grouse nesting areas could yield improved reproductive success.
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This research brief summarizes a series of interviews with land managers who make decisions about post-fire rehabilitation and restoration. These interviews explored barriers to improving post-fire recovery that included: policies and funding cycles that constrain managers’ ability to monitor and re-treat effectively, pressure and legal action from interest groups, pressure from concerned public/neighbors, climate change, and ecological debates such as native vs. non-native species use. These identified barriers provide a social-political-ecological framework that may influence on-the-ground manager decisions after wildfires in the Great Basin.
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In this study, researchers modeled the climatic envelope for subspecies wyomingensis for contemporary and future climates (decade 2050). Comparison of the contemporary and decade 2050 models shows a predicted 39% loss of suitable climate. Much of this loss will occur in the Great Basin where impacts from increasing fire frequency and encroaching weeds have been eroding the A. tridentata landscape dominance and ecological functions. The goal of this study is to provide a management tool to promote successful restoration by predicting the geographic areas where climate is suitable for this subspecies.
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This fact sheet provides land managers with a brief summary of the effects of conifer expansion and infill in sagebrush ecosystems and of potential management strategies.
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These abstracts of recent papers on range management in the West were prepared by Charlie Clements, Rangeland Scientist, USDA Agricultural Research Service, Reno, NV.
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The initial report includes actions to be implemented by Interior’s bureaus to immediately address the threat of rangeland fire to Western sagebrush-steppe landscapes and improve fire management efforts before the start of the 2015 wildfire season.
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This research brief summarizes research that found seed harvester ants, along with small mammals, could have a large impact on reseeding
efforts after a fire. But the populations over time are not well known. The number of ants in burned areas is significantly greater than unburned areas, but this may be an initial, short-lived response.
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This paper highlights greater sage-grouse egg depredation observations obtained opportunistically from three common raven nests located in Idaho and Nevada where depredated greater sage-grouse eggs were found at or in the immediate vicinity of the nest site, including the caching of eggs in nearby rock crevices. Nests were opportunistically monitored by counting and removing depredated eggs and shell fragments from the nest sites during each visit to determine the extent to which the common raven pairs preyed on greater sage-grouse eggs. These observations may represent the first evidence that breeding, territorial pairs of common ravens cache greater sage-grouse eggs and are capable of depredating multiple greater sage-grouse nests.
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This report outlines national and regional prescribed fire activity, state prescribed fire programs, and identifies impediments limiting the use of prescribed fire. The results include all federal, state, and private prescribed fire acres for forestry, rangeland, and agricultural burning that occurred in 2014.