Cooperative Fish and Wildlife Research Units Program: Pennsylvania
Education, Research and Technical Assistance for Managing Our Natural Resources

Pennsylvania Staff Member


Dr. Duane R. Diefenbach

Duane R. Diefenbach

Unit Leader
Phone: (814) 865 - 3992
Email: ddiefenbach@psu.edu
Personal website

Education

  • Ph D University of Georgia 1992
  • MS University of Maine 1988
  • BS Washington State University 1985

Biography

Upon completion of my Ph.D. I worked for the Pennsylvania Game Commission as their biometrician for 7 years. There I began my current research involving grassland sparrows and black bears. Since 1999 I have been a research scientist with the Pennsylvania Unit and enjoy the challenges in integrating research to improve management decisions.

Teaching Interest

I teach a graduate course in methods of estimating population parameters (WFS 560) .

Research Interest

My primary research interests focus on empirically evaluating models used to estimate population parameters and how those models are incorporated in management decisions. Consequently, many of my research projects involve game species (white-tailed deer, black bear, and wild turkey). My research has focused on methods of estimating abundance as well as hunter attitudes and behavior and how that influences harvest rates and the spatial distribution of hunter harvest. Recent collaboration with the Pennsylvania Game Commission and DCNR Bureau of Forestry has involved the use of Structured Decision Making in developing management decision tools. Future research will likely work on integrating these tools in a quantitative manner into decision making processes.<br><br>However, not all my research involves game species. For over 10 years I studied grassland sparrows on reclaimed surface mines in Pennsylvania. There are several endangered and special concerns species that use reclaimed surface mines and I focused on grasshopper, Savannah, and Henslow's sparrows because they are relatively abundant and are obligate grassland species. Also, for my Ph.D. I reintroduced bobcats to Cumberland Island, Georgia and I continue to monitor the genetic and population dynamics.

Research Publications Publication Date
Williamson, L. T., W. David Walter, S. R. Klinger, and D. R. Diefenbach. 2018. Incorporating detection probability to estimate pheasant density. Journal of Wildlife Management. 82(8):1680–1688; DOI: 10.1002/jwmg.21545 | Download 2018-10-31
Weiderholt, R., R. Fernandez-Duque, D. R. Diefenbach, and R. Rudran. 2010. Modeling the impacts of hunting on the population dynamics of red howler monkeys (Alouatta seniculus). Ecological Modelling 221:2482-2290. | Abstract 2010-08-31
Walter, W.D., T.S. Evans, D. Stainbrook, B.D. Wallingford, C.S. Rosenberry, and D.R. Diefenbach. 2018. Heterogeneity of a landscape influences size of home range in a North American cervid. Scientific Reports 8:14667. DOI:10.1038/s41598-018-32937-7. | Abstract | Download | Publisher Website 2018-10-31
Wallingford, B. D., D. R. Diefenbach, E. S. Long, C. S. Rosenberry, and G. L. Alt. 2017. Biological and social outcomes of antler point restriction harvest regulations for white-tailed deer. Wildlife Monographs 196. | Download 2017-01-31
Wagner, T., D.R. Diefenbach, A.S. Norton, and S.A. Christensen. 2011. Using multilevel models to quantify heterogeneity in resource selection. Journal of Wildlife Management 75:1788-1796. | Abstract | Download 2011-11-30
Vreeland, J. K., D. R. Diefenbach, and B. D. Wallingford. 2004. Survival rates, mortality causes, and habitats of Pennsylvania white-tailed deer fawns. Wildlife Society Bulletin 32:542-553. 2004-07-31
Tucker, M. et al. 2018. Moving in the Anthropocene: Global reductions in terrestrial mammalian movements. Science 359:466-469. DOI: 10.1126/science.aam9712 | Download 2018-01-31
Stedman, R., D. R. Diefenbach, C. B. Swope, J. C. Finley, A. E. Luloff, H. C. Zinn, G. A. Wang. 2004. Integrating wildlife and human dimensions research methods to study hunters. Journal of Wildlife Management 68:762-773. 2004-12-31
Stedman, R. C., P. Bhandari, A. E. Luloff, D. R. Diefenbach, and J. C. Finley. 2008. Deer hunting on Pennsylvania's public and private lands: a two-tiered system of hunters? Human Dimensions of Wildlife 13:222-233. | Download 2008-08-31
Stauffer, G. E., M. R. Marshall, D. R. Diefenbach, and D. W. Brauning. 2010. Reclaimed surface mine habitat and grassland bird populations. Pages 86-96 in S. K. Majumdar, T. L. Master, M. C. Brittingham, R. M. Ross, R. S. Mulvihill, and J. E Huffman, eds. Avian Ecology and Conservation: A Pennsylvania focus with national implications. Pennsylvania Academy of Science, Easton, Pennsylvania, USA. 2010-01-31
Stauffer, G. E., D. R. Diefenbach, M. Marshall, and D. Brauning. 2011. Nest success of grassland sparrows on reclaimed surface mines. Journal of Wildlife Management 75:548-557. | Abstract 2011-05-31
Rosenberry, C. S., and D. R. Diefenbach. 2019. A comparison of spatial variation of deer harvests between small and large management units in Pennsylvania. Wildlife Society Bulletin. 43:71–76; DOI: 10.1002/wsb.939 | Download 2019-01-31
Rosenberry, C. S., E. S. Long, H. M. Hassel-Finnegan, V. P. Buonaccorsi, D. R. Diefenbach, and B. D. Wallingford. 2009. Lack of mother–offspring relationships in white-tailed deer capture groups. Journal of Wildlife Management 73:357-361. | Abstract 2009-04-30
Rosenberry, C. S., D. R. Diefenbach, B. D. Wallingford. 2004. Reporting rate variability and precision of white-tailed deer harvest estimates in Pennsylvania. Journal of Wildlife Management 68:860-869. 2004-12-31
Rosenberry, C. S., A. S. Norton, D. R. Diefenbach, J. T. Fleegle, and B. D. Wallingford. 2011. White-tailed deer population trends and age ratios as herd management and predator impact measures in Pennsylvania. Wildlife Society Bulletin 35:461-468. | Abstract | Download 2011-11-30
Robinson, K.F., A.K. Fuller, M.V. Schiavone, B. Swift, D.R. Diefenbach, W.F. Siemer, and D.J. Decker. 2017. Addressing wild turkey (Meleagris gallapavo) population declines using structured decision making. Journal of Wildlife Management. DOI: 10.1002/jwmg.21220 2017-02-28
Robinson, K. F., D. R. Diefenbach, A. K. Fuller, J. E. Hurst, and C. S. Rosenberry. 2014. Can managers compensate for coyote predation of white-tailed deer? Journal of Wildlife Management 78:571–579. | Download 2014-04-30
Norton, A. S., D. R. Diefenbach, C. S. Rosenberry, and B. D. Wallingford. 2013. Incorporating Harvest Rates into the Sex-Age-Kill Model for White-tailed Deer. Journal of Wildlife Management. Journal of Wildlife Management 77:606-615. | Download 2013-04-30
Norton, A. S., D. R. Diefenbach, B. D. Wallingford, C. S. Rosenberry. 2012. Spatio-Temporal Variation in Male White-Tailed Deer Harvest Rates in Pennsylvania: Implications for Estimating Abundance. Journal of Wildlife Management 76:136-143. | Abstract | Download 2012-01-31
Millspaugh, J. J., J. R. Skalski, R. L. Townsend, D. R. Diefenbach, M. S. Boyce, L. P. Hansen, and K. Kammermeyer. 2009. An evaluation of Sex-Age-Kill (SAK) model performance. Journal of Wildlife Management 73:442-451. | Abstract | Download 2009-06-30
Miller, W.M., C.M. Miller-Butterworth, D.R. Diefenbach, and W.D. Walter. 2020. Assessment of spatial genetic structure to identify populations at risk for infection of an emerging epizootic disease. Ecology and Evolution 10(9):3977–3990;
https://doi.org/10.1002/ece3.6161 | Download
2020-05-31
McClintock, B. T., J. M. Hill, L. Fritz, K. Chumbley, K. Luxa, and D. R. Diefenbach. 2013, Mark-resight abundance estimation under incomplete identification ofmarked individuals. Methods in Ecology and Evolutio. doi: 10.1111/2041-210X.12140. 2013-10-31
Mattice, J. A., D. W. Brauning, and D. R. Diefenbach. 2005. Abundance of grassland sparrows on reclaimed surface mines in western Pennnsylvania. Pages (504-510) in C. J. Ralph and T. D. Rich, editors. Pacific Southwest Research Station, U. S. Department of Agriculture, Forest Service General Technical Report PSW-GTR-191. 2004-05-31
Marshall, M. R., and D. R. Diefenbach. 2010. Henslow’s sparrow. Pages 159-162 in M. A. Steele, M. C. Brittingham, T. J. Maret, and J. F. Merritt, editors. Terrestrial Vertebrates of Pennsylvania: A Complete Guide to Species of Conservation Concern. Johns Hopkins University Press, Baltimore, Maryland, USA. 2010-10-31
Marshall, M. R., and D. R. Diefenbach. 2010. Grasshopper sparrow. Pages 316-320 in M. A. Steele, M. C. Brittingham, T. J. Maret, and J. F. Merritt, editors. Terrestrial Vertebrates of Pennsylvania: A Complete Guide to Species of Conservation Concern. Johns Hopkins University Press, Baltimore, Maryland, USA. 2010-10-31
Marshall, M. R., D. R. Diefenbach, L. A. Wood, and R. J. Cooper. 2004. Annual survival estimation of migratory songbirds confounded by incomplete breeding site-fidelity: study designs that may help. Animal Biodiversity and Conservation 27:59-72. 2004-08-31
Mahan, C. G. D. R. Diefenbach, and W. Cass. 2007. Evaluating and revising a long-term monitoring program for vascular plants: lessons from Shenandoah National Park. Natural Areas Journal 27:16-24. 2007-01-31
Lutz, C. L., D. R. Diefenbach, C. S. Rosenberry. 2016. Proximate influences on female dispersal in white-tailed deer. Journal of Wildlife Management 80:1218-1226 DOI: 10.1002/jwmg.21106 | Download 2016-06-30
Lutz, C. L., D. R. Diefenbach, C. S. Rosenberry. 2015. Population density influences dispersal in female white-tailed deer. Journal of Mammalogy 96:494-501. | Download 2015-06-30
Long, E. S., R. A. Sweitzer, D. R. Diefenbach, and M. Ben-David. 2005. Anthropogenic CO2 alters bone collagen delta-13C of mountain lions: controlling for atmospheric variation in stable isotope studies. Oecologia 146:148-156. 2004-11-30
Long, E. S., D. R. Diefenbach, C. S. Rosenberry, and B. D. Wallingford. 2008. Multiple proximate and ultimate causes of natal dispersal in white-tailed deer. Behavioral Ecology 19:1235-1242 doi:10. 1093/beheco/arn082. | Abstract | Download 2008-08-31
Long, E. S., D. R. Diefenbach, C. S. Rosenberry, B. D. Wallingford, and M. D. Grund. 2005. Landscape structure influences dispersal distance of white-tailed deer. Journal of Mammalogy 86:623-629. 2005-06-30
Long, E. S., D. R. Diefenbach, B. D. Wallingford, C. S. Rosenberry. 2010. Influence of Roads, Rivers, and Mountains on Natal Dispersal of White-tailed Deer. Journal of Wildlife Management 74:1242-1249. | Abstract | Download 2010-08-31
Laake, J. L. D. Johnson, D. R. Diefenbach, M. A. Ternent. 2014. Hidden Markov Model for Dependent Tag Loss and Survival Estimation. Journal of Agricultural, Biological, and Environmental Statistics 19:522-540. | Abstract | Download 2014-12-31
Hill, J. M., and D. R. Diefenbach. 2013. Occupancy patterns of declining grassland sparrow populations in a fragmented and forested landscape. Conservation Biology 28:735-744. | Abstract | Download | Publisher Website 2014-01-31
Hill, J. M., and D. R. Diefenbach. 2013. Experimental removal of woody vegetation does not increase nesting success or fledgling production in two grassland sparrows (Ammodramus) in Pennsylvania. Auk 130:764-773. | Download 2013-10-31
Hill, J. M., J. F. Egan, G. E. Stauffer, and D. R. Diefenbach. 2014. Habitat availability is a more plausible explanation than insecticide acute toxicity for U.S. grassland bird species declines. PLoS ONE 9(5): e98064. doi:10.1371/journal.pone.0098064 | Download 2014-05-31
Hassinger, J. D., C. M. Butchkoski, and D. R. Diefenbach. 2008. Managing surface rock communities for Neotoma magister. Pages 213-246 in J. Wright and J. Peles, editors. The Allegheny Woodrat: Ecology, Conservation, and Management of a Declining Species. Springer-Verlag, New York, USA. 2008-08-31
Gingery, T. M., D. R. Diefenbach, B. D. Wallingford, and C. S. Rosenberry. 2018. Landscape-level patterns in fawn survival across North America. 82:1003-1013 DOI: 10.1002/jwmg.21456. | Download 2018-06-30
Gigliotti, L. C., and D. R. Diefenbach. 2018. Risky behavior and its effect on survival: snowshoe hare behavior under varying moonlight conditions. Journal of Zoology 305:27-34. doi:10.1111/jzo.12532 | Download 2018-01-31
Gigliotti, L. C., N. D. Berg, R. Boonstra, S. M. Cleveland., D. Diefenbach, E. M. Gese, J. S. Ivan, K. Kielland, C. J. Krebs, A. V. Kumar, L. S. Mills, J. N. Pauli, H B. Underwood, E. C. Wilson, M. J. Sheriff. 2020. Latitudinal variation in snowshoe hare (Lepus americanus) body mass: A test of Bergmann’s Rule. Canadian Journal of Zoology 98:88-95. https://doi.org/10.1139/cjz-2019-0184 | Download 2020-01-31
Gigliotti, L. C., D. R. Diefenbach, M. J. Sheriff. 2017. Geographic variation in winter adaptations of snowshoe hares. Canadian Journal of Zoology 95:539-545. 2017-05-31
Gigliotti, L. C., B. Jones, M. Lovallo, and D. R. Diefenbach. 2018. Snowshoe hare multi-level habitat use in Pennsylvania in relation to prescribed burning. Journal of Wildlife Management 82:435-444 DOI: 10.1002/jwmg.21375. | Download 2018-02-28
Diefenbach, D.R., L.A. Hansen, R.J. Warren, M.J. Conroy, and M.G. Nelms. 2009. Restoration of bobcats to Cumberland Island, Georgia, USA: Lessons learned and evidence for the role of bobcats as keystone predators. Pages 423-435 in A. Vargas, C. Breitenmoser and U. Breitenmoser (editors). Iberian Lynx Ex situ Conservation: An Interdisciplinary Approach. Fundación Biodiversidad, Madrid, Spain. | Abstract | Download 2009-10-31
Diefenbach, D. R., and S. M. Shea. 2011. Managing white-tailed deer: eastern North America. Pages 481-500 in D. G. Hewitt, editor. Biology and Management of White-tailed Deer. CRC Press, Boca Raton, Florida, USA. 2011-07-31
Diefenbach, D. R., W. C. Vreeland, M.J. Casalena, M. V. Schiavone. 2016. Retention of riveted aluminum leg bands by wild turkeys. Journal of Fish and Wildlife Management. doi: http://dx.doi.org/10.3996/072015-JFWM-064 | Download 2016-02-28
Diefenbach, D. R., T. Wagner and G. E. Stauffer. 2014. Setting Objectives for Managing Key Deer. U.S. Department of Interior, Fish and Wildlife Service, Cooperator Science Series FWS/CSS-106-2014,Washington, D.C. | Download 2014-06-30
Diefenbach, D. R., S. L. Rathbun, J. K. Vreeland, D. Grove, and W. J. Kanapaux. 2016. Evidence for range contraction of snowshoe hare in Pennsylvania. Northeastern Naturalist 23:229-248. | Download 2016-06-30
Diefenbach, D. R., M. R. Marshall, J. A. Mattice, and D. W. Brauning. 2007. Incorporating availability for detection in estimates of bird abundance. Auk 124:96-106. 2007-01-31
Diefenbach, D. R., M. J. Casalena, M. Schiavone, D. Swanson, M. Reynolds, R. C. Boyd, R. Eriksen, and B. Swift. 2009. Loss of butt-end leg bands on male wild turkeys. Journal of Wildlife Management 73:996-999. | Abstract 2009-08-31
Diefenbach, D. R., M. Casalena, M. Schiavone, M. Reynolds, R. Eriksen, W. C. Vreeland, B. Swift, R. C. Boyd. 2012. Variation in Spring Harvest Rates of Male Wild Turkeys in New York, Ohio, and Pennsylvania. Journal of Wildlife Management 76:514-522. | Abstract 2012-04-30
Diefenbach, D. R., L. Hansen, J. Bohling, and C. Miller-Butterworth. 2015. Population and genetic outcomes 20 years after reintroducing bobcats (Lynx rufus) to Cumberland Island, Georgia USA. Ecology and Evolution 5:4885–4895. doi: 10.1002/ece3.1750. | Download 2015-01-31
Diefenbach, D. R., L. A. Hansen, R. J. Warren, and M. J. Conroy. 2006. Spatial organization of a reintroduced population of bobcats. Journal of Mammalogy. 87:394-401. 2006-05-31
Diefenbach, D. R., L. A. Hansen, C. Miller-Butterworth, J. H. Bohling, R. J. Warren, and M. J. Conroy. 2013. Re-introduction of bobcats to Cumberland Island, Georgia, USA: status and lessons learned after 25 years.  Pages 235-240 in P. S. Soorae, editor. Global re-introduction Perspectives: 2013. Further Case Studies from Around the Globe. IUCN/SSC Re-introduction Specialist Group, Gland, Switzerland and Abu Dhabi Environment Agency, UAE. 282pp.  | Download 2013-10-31
Diefenbach, D. R., J. L. Laake, and G. L. Alt. 2004. Spatio-temporal and demographic variation in the harvest of black bears: implications for population estimation. Journal of Wildlife Management 68:947-959. 2004-12-31
Diefenbach, D. R., J. A. McQuaide, J. A. Mattice. 2002. Using PDAs to collect geo-referenced data. Bulletin of the Ecological Society of America 83:256-2. 2002-08-31
Diefenbach, D. R., G. L. Alt, B. D. Wallingford, C. S. Rosenberry, and E. S. Long. 2019. Effect of male age structure on demography and breeding behavior in white-tailed deer. Journal of Wildlife Management 83:1368-1376. DOI: 10.1002/jwmg.21712 | Download 2019-08-31
Diefenbach, D. R., E. S. Long, C. S. Rosenberry, B. D. Wallingford, and D. R. Smith. 2008. Modeling the distribution of dispersal distances in male white-tailed deer. Journal of Wildlife Management 72:1296-1303. | Abstract | Download 2008-08-31
Diefenbach, D. R., D. W. Brauning, J. A. Mattice. 2003. Variability in Grassland Bird Counts Related to Observer Differences and Species Detection Rates. Auk 120:1168-1179. 2003-10-31
Diefenbach, D. R., C. S. Rosenberry, and R. C. Boyd. 2004. Efficacy of detecting Chronic Wasting Disease via sampling hunter-killed white-tailed deer. Wildlife Society Bulletin 32:267-272. 2004-04-30
Diefenbach, D. R., C. O. Kochanny, J. K. Vreeland, and B. D. Wallingford. 2003. Evaluation of an expandable, breakaway radiocollar for white-tailed deer fawns. Wildlife Society Bulletin 31:756-761. 2003-10-31
Diefenbach, D. R., C. F. Riegner, and T. S. Hardisky. 2001. Harvest and reporting rates of game farm ring-necked pheasants. Wildlife Society Bulletin 29:1050-1059. 2001-03-31
Diefenbach, D. R., C. B. Swope, J. C. Finley, A. E. Luloff, H. C. Zinn, G. J. San Julian, and R. Stedman. 2005. Bear and Deer Hunter Density and Distribution on Public Land in Pennsylvania. Human Dimensions of Wildlife 10:201-212. 2005-07-31
Diefenbach, D. R. 2010. Snowshoe hare. Pages 386-389 in M. A. Steele, M. C. Brittingham, T. J. Maret, and J. F. Merritt, editors. Terrestrial Vertebrates of Pennsylvania: A Complete Guide to Species of Conservation Concern. Johns Hopkins University Press, Baltimore, Maryland, USA. 2010-10-31
Diefenbach, D. R. 2009. Estimating avian population size using Bowden’s estimator. Auk 126:211-217. | Abstract 2009-01-31
Conn, P. B., and D. R. Diefenbach. 2007. Adjusting age and stage distributions for misclassification errors. Ecology 88:1977-1983. 2007-08-31
Conn, P. B., D. R. Diefenbach, J. L. Laake, M. A. Ternent, and G. C. White. 2008. Bayesian analysis of wildlife age-at-harvest data. Biometrics 64:1170-1177. 2007-11-30
Casalena, M. J., R. Everett, W. C. Vreeland, I. D. Gregg, and D. R. Diefenbach. 2016. Timing of spring wild turkey hunting in relation to nest incubation. Proceedings of the National Wild Turkey Symposium 11:237-247. | Download 2016-01-31
Casalena, M. J., M. A. Lowles, and D. R. Diefenbach. 2005. Factors suppressing a wild turkey population in southcentral Pennsylvania. Proceedings of the Ninth Wild Turkey Symposium 9:135-144. 2005-09-30
Buderman, F. E., D. R. Diefenbach, M. J. Casalena, C. S. Rosenberry, B. D. Wallingford. 2014. Accounting for tagging-to-harvest mortality in a Brownie tag-recovery model by incorporating radio-telemetry data. Ecology and Evolution 4:1439-1450. | Abstract | Download | Publisher Website 2014-03-31
Buderman, F. E., D. R. Diefenbach, C. S. Rosenberry, B. D. Wallingford, and E. S. Long. 2014. Effect of hunter selectivity on harvest rates of radio-collared white-tailed deer in Pennsylvania. Journal of Wildlife Management 78:1456-1465. | Abstract | Download | Publisher Website 2014-10-31
Bhandari, P., R. C. Stedman, A. E. Luloff, J. C. Finley, and D. R. Diefenbach. 2006. Effort versus motivation: factors affecting antlered and antlerless deer harvest success in Pennsylvania. Human Dimensions of Wildlife 11:423-436. | Download 2006-10-31
Begley-Miller, D. R., D. R. Diefenbach, M. E. McDill, C. S. Rosenberry, and E. H. Just. 2018. Evaluating inter-rater reliability and statistical power of vegetation measures assessing deer impact. Forests 9:669. https://doi.org/10.3390/f9110669 | Download 2018-10-31
Begley-Miller, D. B., D. R. Diefenbach, M. McDill, P. Drohan, C. Rosenberry, and E. Just. Soil Chemistry, not short-term (2 year) deer exclusion, explains occupancy of several understory plant taxa in forests affected by acid deposition. AoB Plants 11:1-15 https://doi.org/10.1093/aobpla/plz044 | Download 2019-08-31
Baker, L. A., R. J. Warren, D. R. Diefenbach, W. E. James, and M. J. Conroy. 2001. Prey selection by reintroduced bobcats (Lynx rufus) on Cumberland Island, Georgia. American Midland Naturalist 145:80-93. 2001-03-31
Project Completion Date
Characterization of habitat for pheasant in wild pheasant recovery areas of Pennsylvania 2014-11-30
Snowshoe Hare Habitat Relationships in Response to Northern Forest Management 2015-12-31
Structured Decision Making for Key Deer Management and Recovery 2014-06-30
Fall harvest rates of female wild turkeys in New York 2017-03-31
Deer abundance and its relationship to factors that affect forest vegetation conditions 2022-06-30
Allegheny Woodrat: Identifying Strategies to Conserve a Declining Species 2014-09-30
Using North American Breeding Bird Survey Data to Evaluate Portential Consequences of Energy Development and Other Land Use Changes on Bird Populations in the Northeast Appalachian Region 2014-09-30
Harvest Rates of Hen Wild Turkeys in Pennsylvania 2014-06-30
Developing An Adaptive Management Approach For Meeting Deer And Forest Management Objectives 2013-09-30
Methods of estimating deer abundance at Gettysburg National Military Park: Testing model assumptions 2011-12-31
Dispersal of female white-tailed deer in Pennsylvania 2012-05-15
Effects of shrub removal on breeding grassland sparrows 2012-12-31
Dispersal rates, timing, and distances of Pennsylvania black bears 2011-06-30
Movement and habitat use of sika and white-tailed deer on Assateague Island National Seashore 2008-08-01
Incorporating radio telemetry data in tag-return studies 2013-05-15
Evaluation of the PA Sex-Age-Kill Model for White-tailed Deer 2010-05-15
Testing Assumptions of Distance Sampling to Estimate Abundance of White-tailed Deer 2011-12-31
Changes in forest composition through time due to charcoal production for the iron industry, tree harvest, and deer browse 2021-09-30
Snowshoe hare habitat relationships in response to prescribed burn and northern forest management 2021-12-31
Bobcat population dynamics on Cumberland Island National Seashore 2020-12-31
Fawn survival and predator abundance in Pennsylvania 2020-06-30
Modeling potential habitat for pheasant population restoration 2017-12-31
Name Degree Program Status Completion Date
Lutz, Clayton Master's Completed Program 2016-05-07
Buderman, Frances Master's Completed Program 2012-08-21
Weiderholt, Ruscena PhD Completed Program 2010-12-15
Wallingford, Bret PhD Completed Program 2012-05-07
Vreeland, Wendy Master's Completed Program 2015-05-07
Vreeland, Justin Master's Completed Program 2002-12-10
Stauffer, Glenn Post Doc Completed Program 2014-12-31
Stauffer, Glenn Master's Completed Program 2008-05-08
Stainbrook, David Master's Completed Program 2011-12-15
Norton, Andrew Master's Completed Program 2010-05-15
Marshall, Matthew Post Doc Completed Program 2003-09-30
Lowles, Mark Master's Completed Program 2002-12-10
Long, Eric PhD Completed Program 2005-12-31
Keenan, Matthew Master's Completed Program 2010-12-15
Hill, Jason Post Doc Completed Program 2014-12-31
Hill, Jason PhD Completed Program 2012-08-31
Fritsky, Richard Master's Completed Program 2006-06-15
Christensen, Sonja Master's Completed Program 2010-05-15
Van Buskirk, Amanda Master's Active 2020-07-31
Murphy, Asia PhD Active
Williamson, Lacey Master's Completed Program 2017-12-31
Gingery, Tess Master's Completed Program 2017-12-31
Gigliotti, Laura Master's Completed Program 2016-05-07
Begley, Danielle Post Doc Completed Program 2018-09-01
Begley, Danielle PhD Completed Program 2018-03-01
Kanapaux, William Post Doc Completed Program 2014-09-01
Presentations Presentation Date
Williamson, L. T., S. R. Klinger, D. R. Diefenbach, W. D. Walter. 2017. Density Estimation and Habitat Modeling for Pheasant Population Restoration in Pennsylvania. The Wildlife Society Annual Meeting, Albuquerque, NM. 2017-09-23
Williamson, L. T., D. R. Diefenbach, W. D. Walter. 2016. Modeling potential habitat for pheasant population restoration in Pennsylvania. The Wildlife Society Annual Meeting, Raleigh, NC. 2016-10-16
Williamson, L. T., D. R. Diefenbach, W. D. Walter. 2016. Modeling potential habitat for pheasant population restoration in Pennsylvania. The Pennsylvania Chapter of The Wildlife Society Annual Meeting, Raystown Lake, PA. 2017-04-01
Williamson, L. T., D. R. Diefenbach, W. D. Walter. 2016. Modeling potential habitat for pheasant population restoration in Pennsylvania. Pennsylvania Chapter of The Wildlife Society Annual Meeting, State College, PA. 2016-04-16
Vreeland, W. C., D. R. Diefenbach, M. Ternent. Dispersal Timing, Distance, and Rate of Pennsylvania Black Bear. Annual Conference of The Wildlife Society, Pittsburgh, Pennsylvania. 23 October 2014. 2014-10-23
Rosenberry, C. S., J. Fleegle, B. Wallingford, M. Lovallo, M. Ternent, and D. R. Diefenbach. Under attack? Impacts of predation on white-tailed deer recruitment and populations in Pennsylvania. Annual meeting of the Northeast Association of Fish and Wildlife Agencies, 7-10 April 2013, Saratoga Springs, New York. 2013-04-09
Robinson, K., A. Fuller, M. Schiavone, D. Diefenbach, and W. Siemer. A structured decision making approach to addressing wild turkey population declines. Informs Annual Meeting, 22-23 October 2019, Seattle, Washington, USA. 2019-10-22
Navarro, N., P. J. Drohan, M. McDill, and D. R. Diefenbach. Analysis of White-Tailed Deer (Odocoileus virginianus) Forage Nutrient Content across Northern Appalachian USDA Ecological Sites. Soil Science Society of America annual meeting, 22-25 October 2017, Tampa, FL, USA. 2017-10-23
Murphy, A., D. Miller, and D. R. Diefenbach. Examining habitat partitioning between pennsylvania’s apex carnivores and a common prey species (white-tailed deer fawns). The Wildlife Society Annual Conference, 7-11 October 2018, Cleveland, OH, USA. 2018-10-07
Murphy, A. U., D. Miller, and D. R. Diefenbach. Examining Habitat Partitioning between Pennsylvania’s Apex Carnivores and a Common Prey Species (White-tailed Deer Fawns; Odocoileus virginianus). North American Congress for Conservation Biology, 21-26 July 2018, Toronto, Canada. 2018-07-22
Miller-Butterworth, C., L. Hansen, D. Hoffman, A. Russell, J. Edson, and D. R. Diefenbach. Population genetics of two contrasting island populations of bobcats. The Wildlife Society Annual Meeting, 7-11 October 2018, Cleveland, OH, USA> 2018-10-07
Miller-Butterworth, C., J. Bohling, L. Hansen, D. Hoffman, J. Jordan, D. R. Diefenbach. Population genetics of a reintroduced population of bobcats on Cumberland Island, Georgia: relevance for felid management in Pennsylvania. Pennsylvania Chapter of The Wildlife Society annual meeting, 1 April 2017, Raystown Lake, PA. 2017-04-01
Miller, W.L., D.R. Diefenbach, C. Miller-Butterworth, J. Brown, W. D. Walter. Landscape barriers influence genetic connectivity among white-tailed deer in an area affected by chronic wasting disease. Wildlife Disease Association Meeting, Ithaca NY 2016-08-01
Miller, W.L., D.R. Diefenbach, C. Miller-Butterworth, J. Brown, W. D. Walter. Landscape barriers influence genetic connectivity among white-tailed deer in an area affected by chronic wasting disease. 23rd Annual Meeting of The Wildlife Society, Raleigh NC 2016-10-16
Kanapaux, W., G. Kiker, M. McDill, and D. R. Diefenbach. The use of agent-based simulation models for decision support in adaptive resource management: two contrasting examples. Annual meeting of the Resource Modeling Assocation, 18-21 June 2013, Cornell University, Ithaca, New York, USA 2013-06-18
Just, E. M., D. R. Diefenbach, T. Crandall, S. Lehman, C. Nicholas, and J. Brodnicki. A Decision Model for Managing White-Tailed Deer on Pennsylvania State Forests. Annual Conference of The Wildlife Society, 23 October 2014, Pittsburgh, Pennsylvania. 2014-10-23
Just, E. H., D. R. Diefenbach, P. A. Roth, T. Crandall, and S. Lehman. A decision model for managing white-tailed deer on Pennsylvania state forests. Annual conference of the Northeast Association of Fish and Wildlife Agencies, 7 April 2013, Saratoga Springs, New York, USA. 2013-04-07
Hill, J. M., and D. R. Diefenbach. 2014. Occupancy Patterns of Regionally Declining Grassland Sparrow Populations in a Forested Pennsylvania Landscape. Northeast Association of Fish and Wildlife Agencies Annual Conference 2014-04-14
Hill, J. M., and D. R. Diefenbach. 2012. Enhancing grassland sparrow populations on reclaimed mine grasslands: A large-scale experiment of woody vegetation removal. The Wildlife Society Annual Conference, 15 October 2012, Portland, Oregon, USA. 2012-10-15
Hill, J. M., J. F. Egan, G. E. Stauffer, and D. R. Diefenbach. Habitat availability is a more plausible explanation than insecticide acute toxicity for U.S. grassland bird species declines. Annual Conference of The Wildlife Society, 23 October 2014, Pittsburgh, Pennsylvania. 2014-10-23
Gingery, T. M., D. R. Diefenbach, C. S. Rosenberry, B. D. Wallingford. Landscape-level Patterns in White-tailed deer Fawn Survival in North America. Southeast Deer Study Group Meeting, 21 February 2018, Nashville, TN. 2018-02-21
Gingery, T. M., D. R. Diefenbach, B. D. Wallingford, and C. S. Rosenberry. Space Use of White-tailed Deer Neonates Using Micro-GPS Units. The Wildlife Society Annual Conference, 7-11 October 2018, Cleveland, OH, USA. 2018-10-07
Gingery, T. M., D. R. Diefenbach, B. D. Wallingford, and C. S. Rosenberry. Landscape-level patterns in white-tailed deer fawn survival in North America. Annual meeting of The Wildlife Society, 27 September 2017, Albuquerque, NM. 2017-09-27
Gingery, T. M., D. R. Diefenbach, B. D. Wallingford, and C. S. Rosenberry. 2016. White-tailed deer fawn behavior and survival in Pennsylvania. Annual Meeting of the Pennsylvania Chapter of The Wildlife Society, 16 April 2016, State College, PA. 2016-04-16
Gingery, T. M., D. R. Diefenbach, B. D. Wallingford, C. S. Rosenberry. White-tailed deer fawn survival in North America. Pennsylvania Chapter of The Wildlife Society annual meeting, 1 April 2017, Raystown Lake, PA. 2017-04-01
Diefenbach, D. R., and W. A. Link. Using integrated population models to monitor game species. International Statistical Ecology Conference. 1-4 July 2014, Montpellier, France. 2014-07-01
Diefenbach, D. R., L. M. Hansen, J. H. Bohling, C. Miller-Butterworth, and G. Veron. Impact of Genetic Drift on Island Populations of Mesocarnivores Established on Cumberland Island, Georgia. Annual Meeting of the American Society of Mammalogists, 4 June 2013, Philadelphia, Pennsylvania, USA. 2013-06-04
Diefenbach, D. R., G. L. Alt, B. D. Wallingford, C. S. Rosenberry, and E. S. Long. Effect of male age structure on demography and breeding behavior in white-tailed deer. International Deer Biology Congress, 5-10 August 2018, Estes Park, CO, USA. 2018-08-05
Diefenbach, D. R., E. H. Just, T. Crandall, and S. Lehman. Using Decision Tools to Develop a Deer and Forest Management Program. The Wildlife Society annual meeting, 12 October 2016, Raleigh, NA. 2016-10-12
Diefenbach, D. R., Buderman, F. E., and L. C. Gigliotti. Efficiency of joint known-fate and tag-recovery models for estimating harvest rates of large animals. EURING Technical Meeting, 2-7 July 2017, Barcelona, Spain. 2017-07-06
Diefenbach, D. R. Linking research and management to solve complex problems. Pennsylvania Chapter of The Wildlife Society annual meeting, 1 April 2017, Raystown Lake, PA. 2017-04-01
Diefenbach, D. R. Linking research and management to improve decision making. 20 February 2018. Southeast Deer Study Group Meeting, Nashville, TN. 2018-02-20
Diefenbach, D. R. Linking Research and Management: Why You Should Clearly Define the Problem. The Wildlife Society annual meeting, 12 October 2016, Raleigh, NA. (Invited Oral) 2016-10-12
Diefenbach, D. R. Coyotes, and Bobcats, and Bears! Oh My! Annual conference of the Northeast Fish and Wildlife Agencies, 7 April 2013, Saratoga Springs, New York, USA. DENIED ATTENDANCE BY USGS. 2013-04-07
Casalena, M. J., W. C. Vreeland, R. Everett, I. Gregg, and D. R. Diefenbach. Timing of spring wild turkey hunting in relation to nest incubation. National Wild Turkey Symposium. 2016-01-15
Buderman, F. E., and D. R. Diefenbach. Accounting for tagging-harvest mortality in a Brownie dead-recovery model by incorporating radio-telemetry data. EURING Analytical Meeting, 28 April 2013, Athens, Georgia, USA. 2013-04-28
Buderman, F. E, and D. R. Diefenbach. Using auxiliary known-fate data to improve harvest estimates from tag-recovery models. The Wildlife Society Annual Conference, 16 October 2012, Portland, Oregon, USA. 2012-10-16
Begley-Miller, D. R., D. R. Diefenbach, M. E. McDill, C. S. Rosenberry, and E. Just. Soil chemistry and interspecific competition influence understory forest composition in central Pennsylvania: Implications for wildlife. 2018 Pennsylvania Chapter of The Wildlife Society Annual Conference, State College, PA. 2018-03-24
Begley-Miller, D. R., D. R. Diefenbach, M. E. McDill, C. S. Rosenberry, and E. Just. Soil Chemistry and Interspecific competition influence understory forest composition in central Pennsylvania: implications for wildlife. The Wildlife Society Annual Meeting, 7-11 October 2018, Cleveland, OH, USA. 2018-10-07
Begley-Miller, D. R., D. R. Diefenbach, M. E. McDill, C. S. Rosenberry, and E. Just. Evaluation of Short-term (3 Year) Understory Plant Community Responses to Deer Exclusion, Herbicide, and Lime Application in Central Pennsylvania. Annual Meeting of the Ecological Society of America, 5-10 August 2018, New Orleans, LA, USA. 2018-08-06
Begley-Miller, D. R., D. R. Diefenbach, M. E. McDill, C. S. Rosenberry, and E. Just. 2017. Soil chemistry and its effect on central Pennsylvania's forest wildlife habitat. Annual meeting of The Wildlife Society, 27 September 2017, Albuquerque, NM. 2017-09-26
Begley-Miller, D. R., D. R. Diefenbach, M. E. McDill, C. S. Rosenberry, and E. Just. 2016. Greater than the Sum of its Parts: Understanding Forest Habitat in the Context of Deer, Soil Chemistry, and Competing Vegetation. Annual meeting of the Pennsylvania Chapter of The Wildlife Society, 16 April 2016, State College, PA. 2016-04-16
Begley-Miller, D. R., D. R. Diefenbach, M. E. McDill, C. S. Rosenberry, E. Just. Soil Chemistry and its Effect on the Occupancy of Understory Plant Species. Presented at Pennsylvania Chapter of The Wildlife Society annual meeting, 1 April 2017, Raystown Lake, Pennsylvania. 2017-04-01
Technical Publications Publication Date
Storm, G. L., W. L. Palmer, and D. R. Diefenbach. 2003. Ruffed grouse responses to management of mixed oak and aspen communities in central Pennsylvania. Grouse Research Bulletin No. 1, Pennsylvania Game Commission, Harrisburg, Pennsylvania, USA. 2003-10-31
Stainbrook, D. P., and D. R. Diefenbach. 2012. Estimating white-tailed deer abundance at Gettysburg National Military Park and Eisenhower National Historic Site. Natural Resource Technical Report NPS/NER/NRTR—2012/626. National Park Service, Fort Collins, Colorado. | Download 2012-08-31
Diefenbach, D., W. Vreeland, and K. M. Heister. 2008. Statistical Analysis of Understory Vegetation Data from Valley Forge National Historical Park, Pennsylvania, 1993–2003. Technical Report NPS/NER/NRTR—2008/118. National Park Service. Philadelphia, PA. | Download 2008-04-30
Diefenbach, D. R., and S. A. Christensen. 2009. Movement and habitat use of sika and white-tailed deer on Assateague Island National Seashore, Maryland. Natural Resource Technical Report NPS/NER/NRTR—2009/140. National Park Service, Philadelphia, PA. | Download 2009-07-31
Diefenbach, D. R., B. J. Irwin, and T. Wagner. 2011. Summary of outcomes for the structured decision making workshop for catch and release trout regulations. State College, PA. 2011-03-31