Comparison of trap types for surveying insect communities in Idaho sagebrush steppe ecosystems

2010 ◽  
Vol 86 (2) ◽  
pp. 47-56 ◽  
Author(s):  
Carrie Caselton Lowe ◽  
Sara M. Birch ◽  
Stephen P. Cook ◽  
Frank Merickel
Keyword(s):  
Sagebrush Steppe ◽  
Insect Communities ◽  
Steppe Ecosystems

scholarly journals Using Unmanned Helicopters to Assess Vegetation Cover in Sagebrush Steppe Ecosystems

2012 ◽  
Vol 65 (4) ◽  
pp. 362-370 ◽  
Author(s):  
Robert P. Breckenridge ◽  
Maxine Dakins ◽  
Stephen Bunting ◽  
Jerry L. Harbour ◽  
Randy D. Lee
Keyword(s):  
Vegetation Cover ◽  
Sagebrush Steppe ◽  
Steppe Ecosystems

Ideal conditions for increased trapping success of pygmy rabbits (Brachylagus idahoensis) across the Great Basin

2020 ◽  
Author(s):  
M M Crowell ◽  
K T Shoemaker ◽  
M D Matocq
Keyword(s):  
Great Basin ◽  
Sagebrush Steppe ◽  
Pygmy Rabbit ◽  
Brachylagus Idahoensis ◽  
Steppe Ecosystems ◽  
Trapping Method ◽  
Conservation Concern ◽  
Capture Techniques ◽  
Pygmy Rabbits ◽  
Imperiled Species

Abstract Sagebrush-steppe ecosystems are one of the most imperiled ecosystems in North America and many of the species that rely on these habitats are of great conservation concern. Pygmy rabbits (Brachylagus idahoensis) are one of these species. They rely on sagebrush year-round for food and cover, and are understudied across their range in the intermountain west due in part to their recalcitrance to standard capture techniques. Identifying an efficient and minimally biased trapping method therefore is a critical first step in learning more about this species. We assessed how trap orientation and weather characteristics influenced trap success for Tomahawk traps placed in and around pygmy rabbit burrows by carrying out trapping surveys at 16 occupied pygmy rabbit sites across the Great Basin from 2016 to 2018. We found that pygmy rabbits had a greater probability of being captured in traps with the open end facing away from burrow entrances. Pygmy rabbits also were more likely to be captured on clear days (0–5% cloud cover) and during periods of cooler temperatures during summer months (June–August). We found no evidence that sex or age ratios differed, or that individuals differed meaningfully, in their preference for certain trap orientations. To increase trap success for pygmy rabbits, we suggest maximizing trapping effort during summer months, at dawn, and maximizing the proportion of Tomahawk traps facing away from burrow entrances. We anticipate that our monitoring protocol will enable more effective research into the ecology and conservation of this cryptic and potentially imperiled species.

Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire

2006 ◽  
Vol 367 (1) ◽  
pp. 222-233 ◽  
Author(s):  
Mark A. Engle ◽  
Mae Sexauer Gustin ◽  
Dale W. Johnson ◽  
James F. Murphy ◽  
Wally W. Miller ◽  
...  
Keyword(s):  
Sagebrush Steppe ◽  
Mercury Distribution ◽  
Steppe Ecosystems

Nitrogenase activity by biological soil crusts in cold sagebrush steppe ecosystems

2017 ◽  
Vol 134 (1-2) ◽  
pp. 57-76 ◽  
Author(s):  
Stacy G. Schwabedissen ◽  
Kathleen A. Lohse ◽  
Sasha C. Reed ◽  
Ken A. Aho ◽  
Timothy S. Magnuson
Keyword(s):  
Nitrogenase Activity ◽  
Biological Soil Crusts ◽  
Sagebrush Steppe ◽  
Soil Crusts ◽  
Steppe Ecosystems

scholarly journals Restoration handbook for sagebrush steppe ecosystems with emphasis on greater sage-grouse habitat—Part 1. Concepts for understanding and applying restoration

Circular ◽  
2015 ◽  
Author(s):  
David A. Pyke ◽  
Jeanne C. Chambers ◽  
Mike Pellant ◽  
Steven T. Knick ◽  
Richard F. Miller ◽  
...  
Keyword(s):  
Sagebrush Steppe ◽  
Sage Grouse ◽  
Steppe Ecosystems

scholarly journals Optimizing shrub parameters to estimate gross primary production of the sagebrush ecosystem using the Ecosystem Demography (EDv2.2) model

2018 ◽  
Author(s):  
Karun Pandit ◽  
Hamid Dashti ◽  
Nancy F. Glenn ◽  
Alejandro N. Flores ◽  
Kaitlin C. Maguire ◽  
...  
Keyword(s):  
Climate Change ◽  
Invasive Species ◽  
Primary Production ◽  
Dynamic Models ◽  
Gross Primary Production ◽  
Ecosystem Dynamics ◽  
Spatiotemporal Variability ◽  
Sagebrush Steppe ◽  
Steppe Ecosystems ◽  
Global Carbon

Abstract. Gross primary production (GPP) is one of the most critical processes in the global carbon cycle, but is difficult to quantify in part because of its high spatiotemporal variability. Direct techniques to quantify GPP are lacking, thus, researchers rely on data inferred from eddy covariance (EC) towers and/or ecosystem dynamic models. The latter are useful to quantify GPP over time and space because of their efficiency over direct field measurements and applicability to broad spatial extents. However, such models have also been associated with internal uncertainties and complexities arising from distinct qualities of the ecosystem being analyzed. Widely distributed sagebrush-steppe ecosystems in western North America are threatened by anthropogenic disturbance, invasive species, climate change, and altered fire regimes. Although land managers have focused on different restoration techniques, the effects of these activities and their interactions with fire, climate change, and invasive species on ecosystem dynamics are poorly understood. In this study, we applied an ecosystem dynamic model, Ecosystem Demography (EDv2.2), to parameterize and predict GPP for sagebrush-steppe ecosystems in the Reynolds Creek Experimental Watershed (RCEW), located in the northern Great Basin. Our primary objective was to develop and parameterize a sagebrush (Artemisia spp.) shrubland Plant Functional Type (PFT) for use in the EDv2.2 model, which will support future studies to model estimates of GPP under different climate and management scenarios. To accomplish this, we employed a three-tiered approach. First, to parameterize the sagebrush PFT, we fitted allometric relationships for sagebrush using field-collected data, gathered information from existing sagebrush literature, and borrowed values from other PFTs in EDv2.2. Second, we identified the five most sensitive parameters out of thirteen that were found to be influential in GPP prediction based on previous studies. Third, we optimized the five parameters using an exhaustive search method to predict GPP, and performed validation using observations from two EC sites in the study area. Our modeled results were encouraging, with reasonable fidelity to observed values, although some negative biases (i.e., seasonal underestimates of GPP) were apparent. We expect that, with further refinement, the resulting sagebrush PFT will permit explicit scenario testing of potential anthropogenic modifications of GPP in sagebrush ecosystems, and will contribute to a better understanding of the role of sagebrush ecosystems in shaping global carbon cycles.

scholarly journals Long-Term Dynamics of Production, Respiration, and Net CO2 Exchange in Two Sagebrush-Steppe Ecosystems

Rangelands ◽  
2006 ◽  
Vol 59 (6) ◽  
Author(s):  
Tagir Gilmanov ◽  
Tony Svejcar ◽  
Douglas Johnson ◽  
Raymond Angell ◽  
Nicanor Saliendra ◽  
...  
Keyword(s):  
Co2 Exchange ◽  
Sagebrush Steppe ◽  
Steppe Ecosystems

Synthesizing Old and New: Joining Existing Remote-Sensing and GIS Data to Assess Fire Issues in Sagebrush Steppe Ecosystems

2008 ◽  
Vol 4 (2) ◽  
pp. 251-268 ◽  
Author(s):  
Robert P. Breckenridge ◽  
Randy D. Lee ◽  
Shane J. Cherry ◽  
Ronald C. Rope ◽  
Maxine Dakins
Keyword(s):  
Remote Sensing ◽  
Remote Sensing And Gis ◽  
Sagebrush Steppe ◽  
Steppe Ecosystems ◽  
Gis Data

Annual nitrous oxide flux and soil nitrogen characteristics in sagebrush steppe ecosystems

1991 ◽  
Vol 14 (1) ◽  
Author(s):  
PamelaA. Matson ◽  
Carol Volkmann ◽  
Karyn Coppinger ◽  
WilliamA. Reiners
Keyword(s):  
Nitrous Oxide ◽  
Soil Nitrogen ◽  
Sagebrush Steppe ◽  
Steppe Ecosystems ◽  
Nitrous Oxide Flux ◽  
Oxide Flux

Cost/Benefit Analysis of Managing Invasive Annual Grasses in Partially Invaded Sagebrush Steppe Ecosystems

Weed Science ◽  
2014 ◽  
Vol 62 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Roger Sheley ◽  
Jordan Sheley ◽  
Brenda Smith
Keyword(s):  
Cost Benefit ◽  
Treatment Costs ◽  
Rangeland Management ◽  
Grazing Management ◽  
Sagebrush Steppe ◽  
Present Value ◽  
Targeted Grazing ◽  
Steppe Ecosystems ◽  
Annual Grasses ◽  
The Cost

Our objective was to evaluate the cost/benefit of a single herbicide application or targeted grazing of invasive annual grasses during restoration of partially invaded sagebrush steppe ecosystems used for livestock production. The cost/benefit model used is based on estimating the production of vegetation in response to implementing management and modeling cost/benefit economics associated with that prediction. The after-tax present value of added animal unit months (AUMs) obtained was lower than the present value of after-tax treatment costs after 20 yr for a single herbicide treatment, but higher than the present value of after-tax treatment costs for the grazing management scenario. Even at the highest weed utilization level, the value of added AUMs did not offset the cost of the treatment after 20 yr. However, the grazing treatment resulted in a value of added AUMs higher than the costs after 20 yr. Depending on the invasive weed utilization level, break-even points with targeted grazing occurred at anywhere from the first year to 7 yr. This assessment clearly shows that grazing management can be economically viable for managing annual grass-infested rangeland. In the future, models like the one used here can be improved by incorporating the rangeland management and restoration benefits on the wide variety of goods and services gained from rangeland.

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