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 September 2018
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 August 2010
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 September 2018
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 January 2017
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 November 2011
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. July 2004
Van Buskirk, A., C. S. Rosenberry, B. D. Wallingford, E. J. Domoto, M. E. McDill, P. Drohan, and D. R. Diefenbach. 2021. Modeling how to achieve localized areas of reduced white-tailed deer density. Ecological Modelling 442:109393 DOI: 10.1016/j.ecolmodel.2020.109393 | Download February 2021
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 January 2018
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. December 2004
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 August 2008
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. January 2010
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 May 2011
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 January 2019
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 April 2009
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. December 2004
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 November 2011
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 February 2017
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 April 2014
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 April 2013
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 January 2012
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 June 2009
Miller-Butterworth, C. M., D. R. Diefenbach, J. E. Edson, L. A. Hansen, J. D. Jordan, T. M. Gingery, and A. L. Russell. 2021. Demography and loss of genetic diversity in two insular populations of the bobcat (Lynx rufus). Global Ecology and Conservation 26:e01547. https://doi.org/10.1016/j.gecco.2021.e01457 | Abstract | Download January 2021
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
May 2020
Michel, E. S., B. K. Strickland, S. Demarais, J. L. Belant, T. M Kautz, J. F. Duquette, D. E. Byer, Jr., M. J. Chamberlain, K. V. Miller, R. M. Shuman, J. C. Kilgo, D. R. Diefenbach, B. D. Wallingford, J. K. Vreeland, S. S. Ditchkoff, C. S. DePerno, C. E. Moorman, M. C. Chitwood, and M. A. Lashley. 2020. Relative reproductive phenology and synchrony affect neonate survival in a nonprecocial ungulate. Functional Ecology 34:2536–2547. https://doi.org/10.1111/1365-2435.13680 | Download October 2020
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. October 2013
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. May 2004
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. October 2010
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. October 2010
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. August 2004
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. January 2007
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 June 2016
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 June 2015
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. November 2004
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 August 2008
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. June 2005
Long, E. S., D. R. Diefenbach, C. L. Lutz, C. S. Rosenberry, B. D. Wallingford. 2021. Risky movements? Natal dispersal does not decrease survival of white-tailed deer. Ecology and Evolution 11:2731–2740. DOI: 10.1002/ece3.7227 | Download March 2021
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 August 2010
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 December 2014
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 January 2014
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 October 2013
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 May 2014
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. August 2008
Gingery, T. M., D. R. Diefenbach, C. E. Pritchard, D. C. Ensminger, B. D. Wallingford, and C. S. Rosenberry. 2020. Survival is negatively associated with glucocorticoids in a wild ungulate neonate. Integrative Zoology 16:214-225. https://doi.org/10.1111/1749-4877.12499 | Download November 2020
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 June 2018
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 January 2018
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 January 2020
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. May 2017
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 February 2018
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 October 2009
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. July 2011
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 February 2016
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 June 2014
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 June 2016
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. January 2007
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 August 2009
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 April 2012
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 January 2015
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. May 2006
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 October 2013
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. December 2004
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. August 2002
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 August 2019
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 August 2008
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. October 2003
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. April 2004
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. October 2003
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. March 2001
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. July 2005
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. October 2010
Diefenbach, D. R. 2009. Estimating avian population size using Bowden’s estimator. Auk 126:211-217. | Abstract January 2009
Conn, P. B., and D. R. Diefenbach. 2007. Adjusting age and stage distributions for misclassification errors. Ecology 88:1977-1983. August 2007
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. November 2007
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 January 2016
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. September 2005
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 March 2014
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 October 2014
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 October 2006
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 October 2018
Begley-Miller, D. B., D. R. Diefenbach, M. McDill, P. Drohan, C. Rosenberry, and E. Just. 2019. 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 August 2019
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. March 2001
Project Completion Date
Characterization of habitat for pheasant in wild pheasant recovery areas of Pennsylvania November 2014
Snowshoe Hare Habitat Relationships in Response to Northern Forest Management December 2015
Structured Decision Making for Key Deer Management and Recovery June 2014
Fall harvest rates of female wild turkeys in New York March 2017
Deer abundance and its relationship to factors that affect forest vegetation conditions June 2022
Allegheny Woodrat: Identifying Strategies to Conserve a Declining Species September 2014
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 September 2014
Harvest Rates of Hen Wild Turkeys in Pennsylvania June 2014
Developing An Adaptive Management Approach For Meeting Deer And Forest Management Objectives September 2013
Methods of estimating deer abundance at Gettysburg National Military Park: Testing model assumptions December 2011
Dispersal of female white-tailed deer in Pennsylvania May 2012
Effects of shrub removal on breeding grassland sparrows December 2012
Dispersal rates, timing, and distances of Pennsylvania black bears June 2011
Movement and habitat use of sika and white-tailed deer on Assateague Island National Seashore August 2008
Incorporating radio telemetry data in tag-return studies May 2013
Evaluation of the PA Sex-Age-Kill Model for White-tailed Deer May 2010
Testing Assumptions of Distance Sampling to Estimate Abundance of White-tailed Deer December 2011
Changes in forest composition through time due to charcoal production for the iron industry, tree harvest, and deer browse September 2021
Snowshoe hare habitat relationships in response to prescribed burn and northern forest management December 2021
Bobcat population dynamics on Cumberland Island National Seashore December 2020
Fawn survival and predator abundance in Pennsylvania June 2020
Modeling potential habitat for pheasant population restoration December 2017
Jones, Phillip
Post Doc
pjj5186@psu.edu

Murphy, Asia
PhD
asiajmurphy@gmail.com

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. September 2017
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. October 2016
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. April 2017
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. April 2016
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. October 2014
Van Buskirk, A., C. S. Rosenberry, B. D. Wallingford, E. J. Domoto, M. E. McDill, P. Drohan, D. R. Diefenbach. 2021. Modeling how to achieve localized areas of reduced deer density. Southeast Deer Study Group Meeting, 23 February 2021. February 2021
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. April 2013
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. October 2019
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. October 2017
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. October 2018
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. July 2018
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> October 2018
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. April 2017
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 August 2016
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 October 2016
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 June 2013
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. October 2014
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. April 2013
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 April 2014
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. October 2012
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. October 2014
Gunderman, K. P., D. R. Diefenbach, W. D. Walter, and F. E. Buderman. Efficacy of positional and behavioral change-point models to determine ungulate parturition events. 31 May - 11 June 2021, EURING Technical Meeting, Quebec City, Quebec, Canada June 2021
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. February 2018
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. October 2018
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. September 2017
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. April 2016
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. April 2017
Gingery, T. M. and D. R. Diefenbach. 2021. Fawn survival patterns: looking beyond predators. Southeast Deer Study Group Meeting, 23 February 2021. February 2021
Drohan, P., S. Bayuzal, D. Diefenbach, M. McDill, T. Raab, F. Hirsch, and A. Bonhage. Northern Appalachian, USA relic charcoal hearths and their unique Ecological Fingerprint. Virtual EGU General Assembly 2021, 19-30 April 2021. April 2021
Diefenbach, D., Tess Gingery 2021. Glucocorticoid hormones associated with reduced White-tailed deer fawn survival. Friday Findings, USGS Ecosystems Mission Area. Virtual Webinar Series. 1 October, 2021.<br><br><b>USGS Friday’s Findings Webinar Approval Form</b><br><b> </b><br><i>Friday's Findings is a public webinar series hosted by the USGS Ecosystems Mission Area. Our webinars are typically the first Friday of each month at 2 p.m. eastern time. These half hour webinars are meant to provide listeners an overview of the science topic and chance to ask questions.</i><br><b> </b><br><b>Title:</b> Glucocorticoid hormones associated with reduced White-tailed deer fawn survival<br><br><b>USGS Presenter(s): Tess Gingery, PA Cooperative Fish and Wildlife Research Unit, Pennsylvania State University; Duane R. Diefenbach, U.S. Geological Survey, , PA Cooperative Fish and Wildlife Research Unit, Pennsylvania State University</b> October 2020
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. July 2014
Diefenbach, D. R., M. J. Casalena, P. L. Fackler. A Decision Model for Setting Fall Harvest Regulations for Wild Turkey. Annual Conference of the Northeast Association of Fish and Wildlife Agencies. Virtual conference, 26-28 April 2021. April 2021
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. June 2013
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. August 2018
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. October 2016
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. July 2017
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. April 2017
Diefenbach, D. R. Linking research and management to improve decision making. 20 February 2018. Southeast Deer Study Group Meeting, Nashville, TN. February 2018
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) October 2016
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. April 2013
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. January 2016
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. April 2013
Buderman, F. E., T. M. Gingery, D. R. Diefenbach, L. C. Gigliotti, D. Begley-Miller, M. E. McDill, B. D. Wallingford, C. S. Rosenberry, and P. D. Drohan. Guidance on inferring behavioral states from animal location data. 31 May - 11 June, 2021, EURING Technical Meeting, Quebec City, Quebec, Canada. June 2021
Buderman, F. E., T. M. Gingery, D. R. Diefenbach, L. C. Gigliotti, D. Begley-Miller, B. D. Wallingford, C. S. Rosenberry. Using animal space-use and movement to infer behavioral states: A cautionary tale. Southeast Deer Study Group Meeting, 23 February 2021. February 2021
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. October 2012
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. March 2018
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. October 2018
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. August 2018
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. September 2017
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. April 2016
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. April 2017
Bayuzick, S., P. Drohan, T. Raab, F. Hirsch, A. Bonhage, M. McDill, and D. Diefenbach. Relic charcoal hearths geomorphology and hydrology in mid-Appalachian region of Pennsylvania. Virtual EGU General Assembly 2021, 19 April 2021. April 2021
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. October 2003
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 August 2012
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 April 2008
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 July 2009
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. March 2011