Jill Shaffer (Former Employee)
Science and Products
Filter Total Items: 103
The effects of management practices on grassland birds—Grasshopper Sparrow (Ammodramus savannarum) The effects of management practices on grassland birds—Grasshopper Sparrow (Ammodramus savannarum)
The key to Grasshopper Sparrow (Ammodramus savannarum) management is providing large areas of contiguous grassland of intermediate height with moderately deep litter and low shrub density. Grasshopper Sparrows have been reported to use habitats with 8–166 centimeters (cm) average vegetation height, 4–80 cm visual obstruction reading, 12–95 percent grass cover, 4–40 percent forb cover...
Authors
Jill A. Shaffer, Lawrence Igl, Douglas H. Johnson, Marriah Sondreal, Christopher Goldade, Melvin P. Nenneman, Travis Wooten, Betty Euliss
The effects of management practices on grassland birds—Lark Sparrow (Chondestes grammacus) The effects of management practices on grassland birds—Lark Sparrow (Chondestes grammacus)
Keys to Lark Sparrow (Chondestes grammacus) management include providing open grasslands with sparse-to-moderate herbaceous and litter cover and a woody component and allowing occasional burning or moderate grazing. Lark Sparrows have been reported to use habitats with 10–63 centimeters (cm) average vegetation height, 10–54 percent grass cover, 9–25 percent forb cover, 4–18 percent shrub...
Authors
Jill A. Shaffer, Lawrence Igl, Douglas H. Johnson, Marriah Sondreal, Christopher M. Goldade, Barry Parkin, Betty Euliss
Migrating whooping cranes avoid wind-energy infrastructure when selecting stopover habitat Migrating whooping cranes avoid wind-energy infrastructure when selecting stopover habitat
Electricity generation from renewable-energy sources has increased dramatically worldwide in recent decades. Risks associated with wind-energy infrastructure are not well understood for endangered whooping cranes or other vulnerable crane populations. From 2010 to 2016, we monitored 57 whooping cranes with remote-telemetry devices in the United States Great Plains to determine potential...
Authors
Aaron Pearse, Kristine Metzger, David Brandt, Jill Shaffer, Mark Bidwell, Wade Harrell
Quantifying and addressing the prevalence and bias of study designs in the environmental and social sciences Quantifying and addressing the prevalence and bias of study designs in the environmental and social sciences
Building trust in science and evidence-based decision-making depends heavily on the credibility of studies and their findings. Researchers employ many different study designs that vary in their risk of bias to evaluate the true effect of interventions or impacts. Here, we empirically quantify, on a large scale, the prevalence of different study designs and the magnitude of bias in their...
Authors
Alec Christie, David Abecasis, Mehdi Adjeroud, Juan Alonso, Tatsuya Amano, Alvaro Anton, Barry Baldigo, Rafael Barrientos, Jake Bicknell, Deborah Buhl, Just Cebrian, Ricardo Ceia, Luciana Cibils-Martina, Sarah Clarke, Joachim Claudet, Michael Craig, Dominique Davoult, Annelies De Backer, Mary K. Donovan, Tyler Eddy, Filipe Franca, Jonathan Gardner, Bradley Harris, Ari Huusko, Ian Jones, Brendan Kelaher, Janne Kotiaho, Adrià López-Baucells, Heather Major, Aki Maki-Petays, Beatriz Martinez-Lopez, Carlos Martin, Philip Martin, Daniel Mateos-Molina, Robert McConnaughey, Michele Meroni, Christoph Meyer, Kade Mills, Monica Montefalcone, Norbertas Noreika, Carlos Palacin, Anjali Pande, C. Pitcher, Carlos Ponce, Matthew Rinella, Ricardo Rocha, Maria Ruiz-Delgado, Juan Schmitter-Soto, Jill Shaffer, Shailesh Sharma, Anna Sher, Doriane Stagnol, Thomas Stanley, Kevin Stokesbury, Aurora Torres, Oliver Tully, Teppo Vehanen, Corinne Watts, Qingyuan Zhao, William Sutherland
Improving the ability to include freshwater wetland plants in process-based models Improving the ability to include freshwater wetland plants in process-based models
Considerable effort and resources have been placed into conservation programs designed to reduce or alleviate negative environmental effects of crop production and into evaluation of the benefits of these programs. Wetlands are an important source of ecosystem services, but modeling wetland plants is an emerging science. To date, wetland plant growth has not been explicitly accounted for...
Authors
Amber Williams, David Mushet, Megan Lang, Gregory McCarty, Jill Shaffer, Sharon Kahara, Mari-Vaughn V. Johnson, James R. Kiniry
The effects of management practices on grassland birds—Brewer’s Sparrow (Spizella breweri breweri) The effects of management practices on grassland birds—Brewer’s Sparrow (Spizella breweri breweri)
Keys to Brewer’s Sparrow (Spizella breweri breweri) management include maintaining extensive, unfragmented patches of suitable breeding habitat; reducing conifer cover and height; preventing the invasion of conifers and nonnative plants, especially cheatgrass (downy brome [Bromus tectorum]); minimizing disturbance to soil; and restricting the use of pesticides and herbicides during the...
Authors
Brett Walker, Lawrence D. Igl, Jill A. Shaffer
The effects of management practices on grassland birds—Nelson’s Sparrow (Ammospiza nelsoni nelsoni) The effects of management practices on grassland birds—Nelson’s Sparrow (Ammospiza nelsoni nelsoni)
The key to Nelson’s Sparrow (Ammospiza nelsoni nelsoni) management is providing dense grasses or emergent vegetation near damp areas or freshwater wetlands. Nelson’s Sparrows have been reported to use habitats with 20–122 centimeters (cm) average vegetation height, 41 cm visual obstruction reading, 40–58 percent grass cover, 24 percent forb cover, 5 percent shrub cover, 13 percent bare...
Authors
Jill Shaffer, Lawrence Igl, Douglas H. Johnson, Marriah Sondreal, Christopher Goldade, Paul Rabie, Betty Euliss
The effects of management practices on grassland birds—Lesser Prairie-Chicken (Tympanuchus pallidicinctus) The effects of management practices on grassland birds—Lesser Prairie-Chicken (Tympanuchus pallidicinctus)
The key to Lesser Prairie-Chicken (Tympanuchus pallidicinctus) management is maintaining expansive sand shinnery oak (Quercus havardii) or sand sagebrush (Artemisia filifolia) grasslands. Within these grasslands, areas should contain short herbaceous cover for lek sites (that is, an area where male prairie-chickens gather to engage in courtship displays to attract mates); shrubs or tall...
Authors
Brent Jamison, Lawrence D. Igl, Jill A. Shaffer, Douglas H. Johnson, Christopher M. Goldade, Betty Euliss
The effects of management practices on grassland birds—Sedge Wren (Cistothorus stellaris) The effects of management practices on grassland birds—Sedge Wren (Cistothorus stellaris)
Keys to Sedge Wren (Cistothorus stellaris) management include providing tall, dense grasslands with moderate forb coverage and minimizing disturbances during the breeding season. Sedge Wrens have been reported to use habitats with 30–166 centimeters (cm) average vegetation height, 8–80 cm visual obstruction reading, 15–75 percent grass cover, 3–78 percent forb cover, less than or equal...
Authors
Jill A. Shaffer, Lawrence D. Igl, Douglas H. Johnson, Marriah Sondreal, Christopher M. Goldade, Barry D. Parkin, Travis Wooten, Betty R. Euliss
The effects of management practices on grassland birds—Savannah Sparrow (Passerculus sandwichensis) The effects of management practices on grassland birds—Savannah Sparrow (Passerculus sandwichensis)
Keys to Savannah Sparrow (Passerculus sandwichensis) management are providing extensive grasslands of intermediate height and density with a well-developed litter layer, controlling succession, and protecting nesting habitat from disturbance during the breeding season. Savannah Sparrows have been reported to use habitats with 11–190 centimeters (cm) average vegetation height, 4–50 cm...
Authors
David Swanson, Jill A. Shaffer, Lawrence D. Igl
The effects of management practices on grassland birds—LeConte’s Sparrow (Ammospiza leconteii) The effects of management practices on grassland birds—LeConte’s Sparrow (Ammospiza leconteii)
Keys to LeConte’s Sparrow (Ammospiza leconteii) management include controlling succession and providing uplands and lowlands with tall, thick herbaceous vegetation and thick litter. LeConte’s Sparrows have been reported to use habitats with 30–90 centimeters (cm) average vegetation height, 19–41 cm visual obstruction reading, 35–43 percent grass cover, 16–27 percent forb cover, less than...
Authors
Jill A. Shaffer, Lawrence D. Igl, Douglas H. Johnson, Marriah Sondreal, Christopher M. Goldade, Amy Zimmerman, Betty Euliss
The effects of management practices on grassland birds—Baird’s Sparrow (Centronyx bairdii) The effects of management practices on grassland birds—Baird’s Sparrow (Centronyx bairdii)
Keys to Baird’s Sparrow (Centronyx bairdii) management are providing native or tame grasslands with moderately deep litter, controlling excessive grazing, and curtailing shrub encroachment. Baird’s Sparrows have been reported to use habitats with less than or equal to (≤) 101 centimeters (cm) average vegetation height, 3–46 cm visual obstruction reading (VOR), 15–71 percent grass cover...
Authors
Jill A. Shaffer, Lawrence D. Igl, Douglas Johnson, Marriah Sondreal, Christopher M. Goldade, Melvin Nenneman, Betty Euliss
Non-USGS Publications**
Dechant, J. A. 2001. Range expansion of Pileated Woodpecker in North Dakota. Prairie Naturalist 33:163-182.
https://pubs.er.usgs.gov/publication/1001692
https://pubs.er.usgs.gov/publication/1001692
Winter, M., S. E. Hawks, J. A. Shaffer, and D. H. Johnson. 2003. Guidelines for finding nests of passerine birds in tallgrass prairie. Prairie Naturalist 35:197-211.
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1159&context=usgsnpwrc.
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1159&context=usgsnpwrc.
Shaffer, J. A., L. D. Igl, and F. VanHove. 2003. Historical and recent records and first nest records of Henslow’s Sparrow in North Dakota. Prairie Naturalist 35:81-94.
https://digitalcommons.unl.edu/usgsnpwrc/159/.
https://digitalcommons.unl.edu/usgsnpwrc/159/.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 103
The effects of management practices on grassland birds—Grasshopper Sparrow (Ammodramus savannarum) The effects of management practices on grassland birds—Grasshopper Sparrow (Ammodramus savannarum)
The key to Grasshopper Sparrow (Ammodramus savannarum) management is providing large areas of contiguous grassland of intermediate height with moderately deep litter and low shrub density. Grasshopper Sparrows have been reported to use habitats with 8–166 centimeters (cm) average vegetation height, 4–80 cm visual obstruction reading, 12–95 percent grass cover, 4–40 percent forb cover...
Authors
Jill A. Shaffer, Lawrence Igl, Douglas H. Johnson, Marriah Sondreal, Christopher Goldade, Melvin P. Nenneman, Travis Wooten, Betty Euliss
The effects of management practices on grassland birds—Lark Sparrow (Chondestes grammacus) The effects of management practices on grassland birds—Lark Sparrow (Chondestes grammacus)
Keys to Lark Sparrow (Chondestes grammacus) management include providing open grasslands with sparse-to-moderate herbaceous and litter cover and a woody component and allowing occasional burning or moderate grazing. Lark Sparrows have been reported to use habitats with 10–63 centimeters (cm) average vegetation height, 10–54 percent grass cover, 9–25 percent forb cover, 4–18 percent shrub...
Authors
Jill A. Shaffer, Lawrence Igl, Douglas H. Johnson, Marriah Sondreal, Christopher M. Goldade, Barry Parkin, Betty Euliss
Migrating whooping cranes avoid wind-energy infrastructure when selecting stopover habitat Migrating whooping cranes avoid wind-energy infrastructure when selecting stopover habitat
Electricity generation from renewable-energy sources has increased dramatically worldwide in recent decades. Risks associated with wind-energy infrastructure are not well understood for endangered whooping cranes or other vulnerable crane populations. From 2010 to 2016, we monitored 57 whooping cranes with remote-telemetry devices in the United States Great Plains to determine potential...
Authors
Aaron Pearse, Kristine Metzger, David Brandt, Jill Shaffer, Mark Bidwell, Wade Harrell
Quantifying and addressing the prevalence and bias of study designs in the environmental and social sciences Quantifying and addressing the prevalence and bias of study designs in the environmental and social sciences
Building trust in science and evidence-based decision-making depends heavily on the credibility of studies and their findings. Researchers employ many different study designs that vary in their risk of bias to evaluate the true effect of interventions or impacts. Here, we empirically quantify, on a large scale, the prevalence of different study designs and the magnitude of bias in their...
Authors
Alec Christie, David Abecasis, Mehdi Adjeroud, Juan Alonso, Tatsuya Amano, Alvaro Anton, Barry Baldigo, Rafael Barrientos, Jake Bicknell, Deborah Buhl, Just Cebrian, Ricardo Ceia, Luciana Cibils-Martina, Sarah Clarke, Joachim Claudet, Michael Craig, Dominique Davoult, Annelies De Backer, Mary K. Donovan, Tyler Eddy, Filipe Franca, Jonathan Gardner, Bradley Harris, Ari Huusko, Ian Jones, Brendan Kelaher, Janne Kotiaho, Adrià López-Baucells, Heather Major, Aki Maki-Petays, Beatriz Martinez-Lopez, Carlos Martin, Philip Martin, Daniel Mateos-Molina, Robert McConnaughey, Michele Meroni, Christoph Meyer, Kade Mills, Monica Montefalcone, Norbertas Noreika, Carlos Palacin, Anjali Pande, C. Pitcher, Carlos Ponce, Matthew Rinella, Ricardo Rocha, Maria Ruiz-Delgado, Juan Schmitter-Soto, Jill Shaffer, Shailesh Sharma, Anna Sher, Doriane Stagnol, Thomas Stanley, Kevin Stokesbury, Aurora Torres, Oliver Tully, Teppo Vehanen, Corinne Watts, Qingyuan Zhao, William Sutherland
Improving the ability to include freshwater wetland plants in process-based models Improving the ability to include freshwater wetland plants in process-based models
Considerable effort and resources have been placed into conservation programs designed to reduce or alleviate negative environmental effects of crop production and into evaluation of the benefits of these programs. Wetlands are an important source of ecosystem services, but modeling wetland plants is an emerging science. To date, wetland plant growth has not been explicitly accounted for...
Authors
Amber Williams, David Mushet, Megan Lang, Gregory McCarty, Jill Shaffer, Sharon Kahara, Mari-Vaughn V. Johnson, James R. Kiniry
The effects of management practices on grassland birds—Brewer’s Sparrow (Spizella breweri breweri) The effects of management practices on grassland birds—Brewer’s Sparrow (Spizella breweri breweri)
Keys to Brewer’s Sparrow (Spizella breweri breweri) management include maintaining extensive, unfragmented patches of suitable breeding habitat; reducing conifer cover and height; preventing the invasion of conifers and nonnative plants, especially cheatgrass (downy brome [Bromus tectorum]); minimizing disturbance to soil; and restricting the use of pesticides and herbicides during the...
Authors
Brett Walker, Lawrence D. Igl, Jill A. Shaffer
The effects of management practices on grassland birds—Nelson’s Sparrow (Ammospiza nelsoni nelsoni) The effects of management practices on grassland birds—Nelson’s Sparrow (Ammospiza nelsoni nelsoni)
The key to Nelson’s Sparrow (Ammospiza nelsoni nelsoni) management is providing dense grasses or emergent vegetation near damp areas or freshwater wetlands. Nelson’s Sparrows have been reported to use habitats with 20–122 centimeters (cm) average vegetation height, 41 cm visual obstruction reading, 40–58 percent grass cover, 24 percent forb cover, 5 percent shrub cover, 13 percent bare...
Authors
Jill Shaffer, Lawrence Igl, Douglas H. Johnson, Marriah Sondreal, Christopher Goldade, Paul Rabie, Betty Euliss
The effects of management practices on grassland birds—Lesser Prairie-Chicken (Tympanuchus pallidicinctus) The effects of management practices on grassland birds—Lesser Prairie-Chicken (Tympanuchus pallidicinctus)
The key to Lesser Prairie-Chicken (Tympanuchus pallidicinctus) management is maintaining expansive sand shinnery oak (Quercus havardii) or sand sagebrush (Artemisia filifolia) grasslands. Within these grasslands, areas should contain short herbaceous cover for lek sites (that is, an area where male prairie-chickens gather to engage in courtship displays to attract mates); shrubs or tall...
Authors
Brent Jamison, Lawrence D. Igl, Jill A. Shaffer, Douglas H. Johnson, Christopher M. Goldade, Betty Euliss
The effects of management practices on grassland birds—Sedge Wren (Cistothorus stellaris) The effects of management practices on grassland birds—Sedge Wren (Cistothorus stellaris)
Keys to Sedge Wren (Cistothorus stellaris) management include providing tall, dense grasslands with moderate forb coverage and minimizing disturbances during the breeding season. Sedge Wrens have been reported to use habitats with 30–166 centimeters (cm) average vegetation height, 8–80 cm visual obstruction reading, 15–75 percent grass cover, 3–78 percent forb cover, less than or equal...
Authors
Jill A. Shaffer, Lawrence D. Igl, Douglas H. Johnson, Marriah Sondreal, Christopher M. Goldade, Barry D. Parkin, Travis Wooten, Betty R. Euliss
The effects of management practices on grassland birds—Savannah Sparrow (Passerculus sandwichensis) The effects of management practices on grassland birds—Savannah Sparrow (Passerculus sandwichensis)
Keys to Savannah Sparrow (Passerculus sandwichensis) management are providing extensive grasslands of intermediate height and density with a well-developed litter layer, controlling succession, and protecting nesting habitat from disturbance during the breeding season. Savannah Sparrows have been reported to use habitats with 11–190 centimeters (cm) average vegetation height, 4–50 cm...
Authors
David Swanson, Jill A. Shaffer, Lawrence D. Igl
The effects of management practices on grassland birds—LeConte’s Sparrow (Ammospiza leconteii) The effects of management practices on grassland birds—LeConte’s Sparrow (Ammospiza leconteii)
Keys to LeConte’s Sparrow (Ammospiza leconteii) management include controlling succession and providing uplands and lowlands with tall, thick herbaceous vegetation and thick litter. LeConte’s Sparrows have been reported to use habitats with 30–90 centimeters (cm) average vegetation height, 19–41 cm visual obstruction reading, 35–43 percent grass cover, 16–27 percent forb cover, less than...
Authors
Jill A. Shaffer, Lawrence D. Igl, Douglas H. Johnson, Marriah Sondreal, Christopher M. Goldade, Amy Zimmerman, Betty Euliss
The effects of management practices on grassland birds—Baird’s Sparrow (Centronyx bairdii) The effects of management practices on grassland birds—Baird’s Sparrow (Centronyx bairdii)
Keys to Baird’s Sparrow (Centronyx bairdii) management are providing native or tame grasslands with moderately deep litter, controlling excessive grazing, and curtailing shrub encroachment. Baird’s Sparrows have been reported to use habitats with less than or equal to (≤) 101 centimeters (cm) average vegetation height, 3–46 cm visual obstruction reading (VOR), 15–71 percent grass cover...
Authors
Jill A. Shaffer, Lawrence D. Igl, Douglas Johnson, Marriah Sondreal, Christopher M. Goldade, Melvin Nenneman, Betty Euliss
Non-USGS Publications**
Dechant, J. A. 2001. Range expansion of Pileated Woodpecker in North Dakota. Prairie Naturalist 33:163-182.
https://pubs.er.usgs.gov/publication/1001692
https://pubs.er.usgs.gov/publication/1001692
Winter, M., S. E. Hawks, J. A. Shaffer, and D. H. Johnson. 2003. Guidelines for finding nests of passerine birds in tallgrass prairie. Prairie Naturalist 35:197-211.
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1159&context=usgsnpwrc.
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1159&context=usgsnpwrc.
Shaffer, J. A., L. D. Igl, and F. VanHove. 2003. Historical and recent records and first nest records of Henslow’s Sparrow in North Dakota. Prairie Naturalist 35:81-94.
https://digitalcommons.unl.edu/usgsnpwrc/159/.
https://digitalcommons.unl.edu/usgsnpwrc/159/.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.