IGBST Grizzly Bear Food Synthesis Report
Completed
By Northern Rocky Mountain Science Center
April 18, 2016
How to Cite: Interagency Grizzly Bear Study Team. 2013. Response of Yellowstone grizzly bears to changes in food resources: a synthesis. Report to the Interagency Grizzly Bear Committee and Yellowstone Ecosystem Subcommittee. Interagency Grizzly Bear Study Team, U.S. Geological Survey, Northern Rocky Mountain Science Center, Bozeman, Montana, USA.
The IGBST Grizzly Bear Food Synthesis Report contained several references to manuscripts that were in review or in preparation at the time the report was published. Those manuscripts have now been published. To access those USGS publications, select the publications tab above.
NOTE: The following reports were published after the food synthesis report was released:
Cited as Greater Yellowstone Whitebark Pine Monitoring Working Group (2013b) in report:
- Greater Yellowstone Whitebark Pine Monitoring Working Group. 2014. Summary of preliminary step-trend analysis from the Interagency Whitebark Pine Long-term Monitoring Program—2004-2013: Prepared for the Interagency Grizzly Bear Study Team. Natural Resource Data Series NPS/GRYN/NRDS—2014/600. National Park Service, Fort Collins, Colorado.
Cited as Mahalovich (2013) in report:
- Mahalovich, M. F. 2013. Grizzly bears and whitebark pine in the Greater Yellowstone Ecosystem. Future status of whitebark pine: blister rust resistance, mountain pine beetle, and climate change. Report 2470 RRM-NR-WP-13-01, U.S. Department of Agriculture Forest Service, Northern Region, Missoula, Montana, USA.
The IGBST Grizzly Bear Food Synthesis Report contained several references to manuscripts that were in review or in preparation at the time the report was published. Here, we provide updates as those journal articles and reports are published:
Detecting grizzly bear use of ungulate carcasses using global positioning system telemetry and activity data
Global positioning system (GPS) wildlife collars have revolutionized wildlife research. Studies of predation by free-ranging carnivores have particularly benefited from the application of location clustering algorithms to determine when and where predation events occur. These studies have changed our understanding of large carnivore behavior, but the gains have concentrated on obligate carnivores.
Authors
Michael R. Ebinger, Mark A. Haroldson, Frank T. van Manen, Cecily M. Costello, Daniel D. Bjornlie, Daniel J. Thompson, Kerry A. Gunther, Jennifer K. Fortin, Justin E. Teisberg, Shannon R Pils, P J White, Steven L. Cain, Paul C. Cross
Density dependence, whitebark pine, and vital rates of grizzly bears
Understanding factors influencing changes in population trajectory is important for effective wildlife management, particularly for populations of conservation concern. Annual population growth of the grizzly bear (Ursus arctos) population in the Greater Yellowstone Ecosystem, USA has slowed from 4.2–7.6% during 1983–2001 to 0.3–2.2% during 2002–2011. Substantial changes in availability of a key f
Authors
Frank T. van Manen, Mark A. Haroldson, Daniel D. Bjornlie, Michael R. Ebinger, Daniel J. Thompson, Cecily M. Costello, Gary C. White
Whitebark pine, population density, and home-range size of grizzly bears in the greater Yellowstone ecosystem
Changes in life history traits of species can be an important indicator of potential factors influencing populations. For grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE), recent decline of whitebark pine (WBP; Pinus albicaulis), an important fall food resource, has been paired with a slowing of population growth following two decades of robust population increase. These obs
Authors
Daniel D. Bjornlie, Frank T. van Manen, Michael R. Ebinger, Mark A. Haroldson, Daniel J. Thompson, Cecily M. Costello
Use of isotopic sulfur to determine whitebark pine consumption by Yellowstone bears: a reassessment
Use of naturally occurring stable isotopes to estimate assimilated diet of bears is one of the single greatest breakthroughs in nutritional ecology during the past 20 years. Previous research in the Greater Yellowstone Ecosystem (GYE), USA, established a positive relationship between the stable isotope of sulfur (δ34S) and consumption of whitebark pine (Pinus albicaulis) seeds. That work combined
Authors
Charles C. Schwartz, Justin E. Teisberg, Jennifer K. Fortin, Mark A. Haroldson, Christopher Servheen, Charles T. Robbins, Frank T. van Manen
Influence of whitebark pine decline on fall habitat use and movements of grizzly bears in the Greater Yellowstone Ecosystem
When abundant, seeds of the high-elevation whitebark pine (WBP; Pinus albicaulis) are an important fall food for grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem. Rates of bear mortality and bear/human conflicts have been inversely associated with WBP productivity. Recently, mountain pine beetles (Dendroctonus ponderosae) have killed many cone-producing WBP trees. We used fall (15
Authors
Cecily M. Costello, Frank T. van Manen, Mark A. Haroldson, Michael R. Ebinger, Steven L. Cain, Kerry A. Gunther, Daniel D. Bjornlie
Dietary breadth of grizzly bears in the Greater Yellowstone Ecosystem
Grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE) are opportunistic omnivores that eat a great diversity of plant and animal species. Changes in climate may affect regional vegetation, hydrology, insects, and fire regimes, likely influencing the abundance, range, and elevational distribution of the plants and animals consumed by GYE grizzly bears. Determining the dietary brea
Authors
Kerry A. Gunther, Rebecca Shoemaker, Kevin L. Frey, Mark A. Haroldson, Steven L. Cain, Frank T. van Manen, Jennifer K. Fortin
How to Cite: Interagency Grizzly Bear Study Team. 2013. Response of Yellowstone grizzly bears to changes in food resources: a synthesis. Report to the Interagency Grizzly Bear Committee and Yellowstone Ecosystem Subcommittee. Interagency Grizzly Bear Study Team, U.S. Geological Survey, Northern Rocky Mountain Science Center, Bozeman, Montana, USA.
The IGBST Grizzly Bear Food Synthesis Report contained several references to manuscripts that were in review or in preparation at the time the report was published. Those manuscripts have now been published. To access those USGS publications, select the publications tab above.
NOTE: The following reports were published after the food synthesis report was released:
Cited as Greater Yellowstone Whitebark Pine Monitoring Working Group (2013b) in report:
- Greater Yellowstone Whitebark Pine Monitoring Working Group. 2014. Summary of preliminary step-trend analysis from the Interagency Whitebark Pine Long-term Monitoring Program—2004-2013: Prepared for the Interagency Grizzly Bear Study Team. Natural Resource Data Series NPS/GRYN/NRDS—2014/600. National Park Service, Fort Collins, Colorado.
Cited as Mahalovich (2013) in report:
- Mahalovich, M. F. 2013. Grizzly bears and whitebark pine in the Greater Yellowstone Ecosystem. Future status of whitebark pine: blister rust resistance, mountain pine beetle, and climate change. Report 2470 RRM-NR-WP-13-01, U.S. Department of Agriculture Forest Service, Northern Region, Missoula, Montana, USA.
The IGBST Grizzly Bear Food Synthesis Report contained several references to manuscripts that were in review or in preparation at the time the report was published. Here, we provide updates as those journal articles and reports are published:
Detecting grizzly bear use of ungulate carcasses using global positioning system telemetry and activity data
Global positioning system (GPS) wildlife collars have revolutionized wildlife research. Studies of predation by free-ranging carnivores have particularly benefited from the application of location clustering algorithms to determine when and where predation events occur. These studies have changed our understanding of large carnivore behavior, but the gains have concentrated on obligate carnivores.
Authors
Michael R. Ebinger, Mark A. Haroldson, Frank T. van Manen, Cecily M. Costello, Daniel D. Bjornlie, Daniel J. Thompson, Kerry A. Gunther, Jennifer K. Fortin, Justin E. Teisberg, Shannon R Pils, P J White, Steven L. Cain, Paul C. Cross
Density dependence, whitebark pine, and vital rates of grizzly bears
Understanding factors influencing changes in population trajectory is important for effective wildlife management, particularly for populations of conservation concern. Annual population growth of the grizzly bear (Ursus arctos) population in the Greater Yellowstone Ecosystem, USA has slowed from 4.2–7.6% during 1983–2001 to 0.3–2.2% during 2002–2011. Substantial changes in availability of a key f
Authors
Frank T. van Manen, Mark A. Haroldson, Daniel D. Bjornlie, Michael R. Ebinger, Daniel J. Thompson, Cecily M. Costello, Gary C. White
Whitebark pine, population density, and home-range size of grizzly bears in the greater Yellowstone ecosystem
Changes in life history traits of species can be an important indicator of potential factors influencing populations. For grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE), recent decline of whitebark pine (WBP; Pinus albicaulis), an important fall food resource, has been paired with a slowing of population growth following two decades of robust population increase. These obs
Authors
Daniel D. Bjornlie, Frank T. van Manen, Michael R. Ebinger, Mark A. Haroldson, Daniel J. Thompson, Cecily M. Costello
Use of isotopic sulfur to determine whitebark pine consumption by Yellowstone bears: a reassessment
Use of naturally occurring stable isotopes to estimate assimilated diet of bears is one of the single greatest breakthroughs in nutritional ecology during the past 20 years. Previous research in the Greater Yellowstone Ecosystem (GYE), USA, established a positive relationship between the stable isotope of sulfur (δ34S) and consumption of whitebark pine (Pinus albicaulis) seeds. That work combined
Authors
Charles C. Schwartz, Justin E. Teisberg, Jennifer K. Fortin, Mark A. Haroldson, Christopher Servheen, Charles T. Robbins, Frank T. van Manen
Influence of whitebark pine decline on fall habitat use and movements of grizzly bears in the Greater Yellowstone Ecosystem
When abundant, seeds of the high-elevation whitebark pine (WBP; Pinus albicaulis) are an important fall food for grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem. Rates of bear mortality and bear/human conflicts have been inversely associated with WBP productivity. Recently, mountain pine beetles (Dendroctonus ponderosae) have killed many cone-producing WBP trees. We used fall (15
Authors
Cecily M. Costello, Frank T. van Manen, Mark A. Haroldson, Michael R. Ebinger, Steven L. Cain, Kerry A. Gunther, Daniel D. Bjornlie
Dietary breadth of grizzly bears in the Greater Yellowstone Ecosystem
Grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE) are opportunistic omnivores that eat a great diversity of plant and animal species. Changes in climate may affect regional vegetation, hydrology, insects, and fire regimes, likely influencing the abundance, range, and elevational distribution of the plants and animals consumed by GYE grizzly bears. Determining the dietary brea
Authors
Kerry A. Gunther, Rebecca Shoemaker, Kevin L. Frey, Mark A. Haroldson, Steven L. Cain, Frank T. van Manen, Jennifer K. Fortin