Frank T van Manen
Ph.D. 1994. Ecology and Statistics. University of Tennessee
B.S. and M.S. 1989. Wageningen Agricultural University, Netherlands
Frank van Manen is an ecologist who blends his research interest in large carnivores with landscape ecology. In 2012 Frank became Team Leader of the Interagency Grizzly Bear Study Team, a cooperative research team that addresses monitoring and research needs for the Greater Yellowstone grizzly bear population. His research focus for the past 25 years has been on bear ecology and management. Prior to his current research on Yellowstone grizzly bears, he conducted numerous studies on American black bears in the southeastern U.S. He has also collaborated on field studies with bear researchers in Ecuador (Andean bear), Sri Lanka (sloth bear), and China (giant panda).
Frank served as Treasurer and then President of the International Association for Bear Research and Management from 2001 through 2013 and is an Associate Editor for the Journal Ursus. He has adjunct appointments with Montana State University and the University of Tennessee.
Frank was born in Arnhem, The Netherlands and earned a combined B.S. and M.S. degree from Wageningen University. After an internship at the Department of Forestry, Wildlife and Fisheries, he entered the doctoral program at University of Tennessee with a major in Ecology and a minor in Statistics.
Formerly, Frank spent 12 years with the USGS Leetown Science Center specializing in (1) responses of mammals to landscape changes; (2) management of large carnivores; (3) international bear conservation; and (4) habitat models to support protection and restoration of plants and trees.
For available articles, click on the Publications tab.
Science and Products
Space use and habitat selection by resident and transient coyotes (Canis latrans)
Little information exists on coyote (Canis latrans) space use and habitat selection in the southeastern United States and most studies conducted in the Southeast have been carried out within small study areas (e.g., ≤1,000 km2). Therefore, studying the placement, size, and habitat composition of coyote home ranges over broad geographic areas...Hinton, Joseph W; van Manen, Frank T.; Chamberlain, Michael J
Book Reivew: A chance for lasting survival: Ecology and behavior of wild giant pandas
“If we watch species going extinct in front of us, how useful is that we publish 100 or even 1,000 papers by studying them?” (p. 330). This quote from senior author Pan Wenshi captures an important essence of this book. A translation of a 2001 monograph originally published in Chinese, this volume details the findings of a 15-year research program...van Manen, Frank T.
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...Gunther, Kerry A.; Shoemaker, Rebecca; Frey, Kevin L.; Haroldson, Mark A.; Cain, Steven L.; van Manen, Frank T.; Fortin, Jennifer K.
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...Bjornlie, Daniel D.; van Manen, Frank T.; Ebinger, Michael R.; Haroldson, Mark A.; Thompson, Daniel J.; Costello, Cecily M.
Capture-recapture of white-tailed deer using DNA from fecal pellet-groups
Traditional methods for estimating white-tailed deer population size and density are affected by behavioral biases, poor detection in densely forested areas, and invalid techniques for estimating effective trapping area. We evaluated a noninvasive method of capture—recapture for white-tailed deer (Odocoileus virginianus) density estimation...Goode, Matthew J; Beaver, Jared T; Muller, Lisa I; Clark, Joseph D.; van Manen, Frank T.; Harper, Craig T; Basinger, P Seth
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...Schwartz, Charles C.; Teisberg, Justin E.; Fortin, Jennifer K.; Haroldson, Mark A.; Servheen, Christopher; Robbins, Charles T.; van Manen, Frank T.
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)...Costello, Cecily M.; van Manen, Frank T.; Haroldson, Mark A.; Ebinger, Michael R.; Cain, Steven L.; Gunther, Kerry A.; Bjornlie, Daniel D.
Re-evaluation of Yellowstone grizzly bear population dynamics not supported by empirical data: response to Doak & Cutler
Doak and Cutler critiqued methods used by the Interagency Grizzly Bear Study Team (IGBST) to estimate grizzly bear population size and trend in the Greater Yellowstone Ecosystem. Here, we focus on the premise, implementation, and interpretation of simulations they used to support their arguments. They argued that population increases documented by...van Manen, Frank T.; Ebinger, Michael R.; Haroldson, Mark A.; Harris, Richard B.; Higgs, Megan D.; Cherry, Steve; White, Gary C.; Schwartz, Charles C.
Body and diet composition of sympatric black and grizzly bears in the Greater Yellowstone Ecosystem
The Greater Yellowstone Ecosystem (GYE) has experienced changes in the distribution and availability of grizzly bear (Ursus arctos) food resources in recent decades. The decline of ungulates, fish, and whitebark pine seeds (Pinus albicaulis) has prompted questions regarding their ability to adapt. We examined body composition and diet of grizzly...Schwartz, Charles C.; Fortin, Jennifer K.; Teisberg, Justin E.; Haroldson, Mark A.; Servheen, Christopher; Robbins, Charles T.; van Manen, Frank T.
Response of Yellowstone grizzly bears to changes in food resources: A synthesis. Final report to the Interagency Grizzly Bear Committee and Yellowstone Ecosystem Subcommittee
The Yellowstone grizzly bear (Ursus arctos) was listed as a threatened species in 1975 (Federal Register 40 FR:31734-31736). Since listing, recovery efforts have focused on increasing population size, improving habitat security, managing bear mortalities, and reducing bear-human conflicts. The Interagency Grizzly Bear Committee (IGBC; partnership...van Manen, Frank T.; Costello, Cecily M.; Haroldson, Mark A.; Bjornlie, Daniel D.; Ebinger, Michael R.; Gunther, Kerry A.; Mahalovich, Mary Frances; Thompson, Daniel J.; Higgs, Megan D.; Irvine, Kathryn M.; Legg, Kristin; Tyers, Daniel B.; Landenburger, Lisa; Cain, Steven L.; Frey, Kevin L.; Aber, Bryan C.; Schwartz, Charles C.
Effects of sampling conditions on DNA-based estimates of American black bear abundance
DNA-based capture-mark-recapture techniques are commonly used to estimate American black bear (Ursus americanus) population abundance (N). Although the technique is well established, many questions remain regarding study design. In particular, relationships among N, capture probability of heterogeneity mixtures A and B (pA and pB, respectively, or...Laufenberg, Jared S.; Van Manen, Frank T.; Clark, Joseph D.
A data-based conservation planning tool for Florida panthers
Habitat loss and fragmentation are the greatest threats to the endangered Florida panther (Puma concolor coryi). We developed a data-based habitat model and user-friendly interface so that land managers can objectively evaluate Florida panther habitat. We used a geographic information system (GIS) and the Mahalanobis distance statistic (D2) to...Murrow, Jennifer L.; Thatcher, Cindy A.; Van Manen, Frank T.; Clark, Joseph D.