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Research

  • Anthony, R. G., E. D. Forsman, A. B. Franklin, D. R. Anderson, K. P. Burnham, G. C. White, C. J. Schwarz, J. Nichols, J. E. Hines, G. S. Olson, S. H. Ackers, S. Andrews, B. L. Biswell, P. C. Carlson, L. V. Diller, K. M. Dugger, K. E. Fehring, T. L. Fleming, R. P. Gerhardt, S. A. Gremel, R. J. Gutiérrez, P. J. Happe, D. R. Herter, J. M. Higley, R. B. Horn, L. L. Irwin, P. J. Loschl, J. A. Reid, and S. G. Sovern. 2006. Status and trends in demography of northern spotted owls, 1985-2003. Wildlife Monographs 163:1-48.
  • Bourque, R.M. and J.B. Bettaso. 2011. Rana boylii (Foothill yellow-legged frog) Reproduction. Herpetological Review Natural History Notes. 42(4), 2011
  • Buchanan, J.B., K.A. Hamm, L.V. Diller, L. J. Salzer, and S. J. Chinnici. 2014. Tree-nesting by peregrine falcons in North America: Historical and additional records. Journal of Raptor Research 48(1):61-67.
  • Burkholder, L.L., and L.V. Diller. 2007. Life history of postmetamorphic coastal tailed frogs (Ascaphus truei) in northwestern California. Journal of Herpetology. 41:251-262.
  • Delheimer, M. S., K. M. Moriarty, K. M. Slauson, A. M. Roddy, D. A. Early, and K. A. Hamm. 2021. Comparative reproductive ecology of two subspecies of Pacific marten (Martes caurina) in California. Northwest Science 94:271-285.
  • Delheimer, M. S., K. M. Moriarty, H. L. Munro, D. A. Early, K. A. Hamm, and R. E. Green. 2022. Structural complexity characterizes fine-scale forest conditions used by Pacific martens. The Journal of Wildlife Management 87:e22388.
  • DeYoung, C. J. 2007. Effects of turbidity on foraging efficiency and growth of salmonids in natural settings. M.S. Thesis, Humboldt State University, Arcata, CA. 58 p.
  • Diller, L. V., and D. M. Thome. 1999. Population density of northern spotted owls in managed young-growth forests in coastal northern California. Journal of Raptor Research 33:275-286.
  • Diller, L., K. Hamm, D. Lamphear, and T. McDonald. 2011. Two decades of research and monitoring of the northern spotted owl on private timberlands in the redwood region: What do we know and what challenges remain? Proceedings of the Redwood Region Forest Science Symposium: The Coast Redwood Forests in a Changing California. PSW-GTR 238.
  • Diller, L. V., J. P. Dumbacher, R. P. Bosch, R. R. Bown, and R. J. Gutierrez. 2014. Removing barred owls from local areas: techniques and feasibility. Wildlife Society Bulletin 3:211-216.
  • Diller, L.V., K. A. Hamm and D.W. Lamphear. 2010. Green Diamond Resource Company Northern Spotted Owl Habitat Conservation Plan Ten-Year Review Report. April 7, 2010, US Fish and Wildlife Service, Arcata Field Office, Arcata, CA. 246pp.
  • Diller, L. V., K. A. Hamm, D. A. Early, D. W. Lamphear, K. M. Dugger, C. B. Yachulic, C. J. Schwarz, P. C. Carlson, and T. L. McDonald. 2016. Demographic response of northern spotted owls to barred owl removal. The Journal of Wildlife Management 80:691-707.
  • Diller, L. V., K. A. Hamm, D. W. Lamphear, and J. L. Thompson. 2008. Summary of fisher (Martes pennanti) studies on Green Diamond Resource Company timberlands, north coastal California. Unpublished report submitted to California Department of Fish and Game. 54pp.
  • Diller, L.V., K. A. Hamm, J. L. Thompson, and T. L. McDonald. 2007. Ecology and management of northern spotted owls on commercial timberlands in coastal northern California. In: R. B. Standiford, G. A. Giusti, Y. Valachovic, W. J. Zielinski, and M. J. Furniss. tech. editors. Proceedings of the redwood region forest science symposium: What does the future hold? PSW-GTR-194.
  • Diller, L. V. and R. L. Wallace. 1994 Distribution of Plethodon elongatus on managed, young growth forests in north coastal California. Journal of Herpetology 28(3):310-318.
  • Diller, L. V. and R. L. Wallace. 1999. Distribution and habitat of Ascaphus truei in streams on managed, young growth forests in north coastal California. Journal of Herpetology 33(1):71-79.
  • Diller, L. V. and R. L. Wallace. 1996. Distribution and habitat of Rhyacotriton variegatus on managed, young growth forests in north coastal California. Journal of Herpetology 30(2):184-191.
  • Dugger, K. M., A. B. Franklin, D. B. Lesmeister, R. J. Davis, J. D. Wiens, G. C. White, J. D. Nichols, J. E. Hines, C. B. Yackulic, C. J. Schwarz, S. H. Ackers, L. S. Andrews, L. L. Bailey, R. Brown, J. Burgher, K. P. Burnhma, P. C. Carlson, T. Chestnut, M. M. Conner, K. E. Dilione, E. D. Forsman, S. A. Gremel, K. A. Hamm, D. R. Herter, J. M. Higley, R. B. Horn, J. M. Jenkins, W. L. Kendall, D. W. Lamphear, C. McCafferty, T. L. McDonald, J. A. Reid, J. T. Rockweit, D. C. Simon, S. G. Sovern, J. K. Swingle, and H. Wise. 2023. Estimating northern spotted owl (Strix occidentalis caurina) pair detection probabilities based on call-back surveys associated with long-term mark-recapture studies, 1993-2018. U.S. Geological Survey Open-File Report 2023–1012.
  • Dugger, K. M., E. D. Forsman, A. B. Franklin, R. J. Davis, G. C. White, C. J. Schwarz, K. P. Burnham, J. D. Nichols, J. E. Hines, C. B. Yackulic, P. F. Doherty, L. Bailey, D. A. Clark, S. H. Ackers, L. S. Andrews, B. Augustine, B. L. Biswell, J. Blakesley, P. C. Carlson, M. J. Clement, L. V. Diller, E. M. Glenn, A. Green, S. A. Gremel, D. R. Herter, J. M. Higley, J. Hobson, R. B. Horn, K. P. Huyvaert, C. McCafferty, T. McDonald, K. McDonnell, G. S. Olson, J. A. Reid, J. Rockweit, V. Ruiz, J. Saenz, and S. G. Sovern. 2016. The effects of habitat, climate, and barred owls on long-term demography of northern spotted owls. The Condor 118:57-116.
  • Early, D. A. 2010. Intraspecific black bear spatial patterns and interactions at a small spatio-temporal scale. M.S. Thesis, Humboldt State University, Arcata, CA. 43 p.
  • Folliard, L. B. 1993. Nest-site characteristics of northern spotted owls in managed forests of northwest California. M.S. thesis, University of Idaho, Moscow. 106p.
  • Folliard, L. B., K. P. Reese, and L. V. Diller. 2000. Landscape characteristics of northern spotted owl nest sites in managed forests of northwestern California. Journal of Raptor Research 34:75-84.
  • Forsman, E. D., R. G Anthony, K. M. Dugger, E. M. Glenn, A. B. Franklin, G. C. White, C. J. Schwarz, K. P. Burnham, D. R. Anderson, J. D. Nichols, J. E. Hines, J. B. Lint, R. J. Davis, S. H. Ackers, L. S. Andrews, B. L. Biswell, P. C. Carlson, L. V. Diller, S. A. Gremel, D. R. Herter, J. M. Higley, R. B. Horn, J. A. Reid, J. Rockweit, J. Schaberel, T. J. Snetsinger, and S. G. Sovern. 2011. Population demography of northern spotted owls. Studies in Avian Biology 40:1-106.
  • Hamm, K. A. 1995. Abundance of dusky-footed woodrats in managed forests of north coastal California. M.S. Thesis, Humboldt State University, Arcata, CA. 46 p.
  • Hamm, K. A. and L. V. Diller. 2009. Forest management effects on abundance of woodrats in northern California. Northwestern Naturalist 90:97-106.
  • Hamm, K. A., L. V. Diller, and D. W. Kitchen. 2002. Comparison of indices to estimate abundance of dusky-footed woodrats. Wildlife Society Bulletin. 30:64-70.
  • Hamm, K. A., L. V. Diller, R. R. Klug, and T. L. McDonald. 2002. Spatial independence of fisher (Martes pennanti) detections at track plates in northwestern California. American Midland Naturalist. 149: 201-210.
  • Hamm, K. A, L. V. Diller, and K. D. Hughes. Abundance and habitat associations of dusky-footed woodrats in managed redwood and Douglas-fir forests. In: R. B. Standiford, G. A. Giusti, Y. Valachovic, W. J. Zielinski, and M. J. Furniss. tech. editors. 2007. Proceedings of the redwood region forest science symposium: What does the future hold? PSW-GTR-194.
  • Hamm, K. A., L. V. Diller, D. W. Lamphear, and D. A. Early. 2012. Ecology and management of Martes on private timberlands in north coastal California. Pages 419–425 in R. B. Standiford, T. J. Weller, D. D. Piirto, and J. D. Stuart, editors. Proceedings of coast redwood forests in a changing California: a symposium for scientists and managers. General Technical Report PSW‐GTR‐238. USDA Forest Service, Pacific Southwest Research Station, Albany, California, USA.
  • Hobart, B.K., D.F. Hofstadter, J.M. Higley, K.A. Hamm, B.P. Dotters, K.N. Roberts, R.L. Cormier, A.B. Franklin, W.J. Berigan, J.J. Keane, W.W. Merkle, D.T. Press, and M.Z. Peery. 2025. Taking action to avoid extinction: Successful regional-scale lethal control of barred owls supports a federal strategy to save spotted owls. Conservation Letters, 2025; 18:e13121
  • House, M.R., 2001. Countersunk Culvert Hydraulics for Upstream Juvenile Fish Passage. M.S. Thesis, Department of Forest Engineering, Oregon State University, Corvallis, Oregon.
  • House, M. R., Pyles, M. R., White, D. 2005. Velocity distributions in stream bed simulation culverts used for fish passage. Journal of American Water Resources Association 41(1): 209-217.
  • Hughes, K. D. 2005. Habitat associations of dusky-footed woodrats in managed Douglas-fir / hardwood forests or northern California. M.S. Thesis, Humboldt State University, Arcata, CA. 40 p.
  • Johnson, D. H., G. C. White, A. B. Franklin, L. V. Diller, I. Blackburn, D. J. Pierce, G. S. Olson, J. B. Buchanan, J. Thrailkill, B. Woodbridge, and M. Ostwald. 2008. Study design for barred owl removal experiments to evaluate potential effects on northern spotted owls. Report prepared for the U.S. Fish and Wildlife Service, Lacey, Washington, and Yreka, California. Washington Department of Fish and Wildlife, Olympia, Washington. 32p.
  • Klug, R. R. 1997. Occurrence of Pacific fisher in the Redwood Zone of northern California and the habitat attributes associated with their detections. Thesis, Humboldt State University, Arcata, California.
  • Kluber, M. R., M.R. House, R.M. Bourque, P.T. Righter, and W.D. Devenport. 2024. Foothill yellow-legged frog (Rana boylii) distribution and oviposition sites on managed timberlands in coastal northwestern California, USA. Herpetological Conservation and Biology 19(2):161-172.
  • Knopf, C. M. 2010. A permeability study on salmonid spawning riffles in the Little River drainage and Canon Creek in northern Humboldt County, California. M.S. Thesis, Humboldt State University, Arcata, CA. 82 p.
  • Lamphear, D. W., Hamm, K., Early, D., & McDonald, T.W. 2024. Marbled Murrelet Habitat Suitability in Redwood Timberlands of Northern Coastal California Utilizing LiDAR-Derived Individual Tree Metrics. PlosOne .
  • Lewis, T. E., Lamphear, D. W., McCanne, D. R., Webb, A. S., Krieter, J. P., & Conroy, W. D. (2000). Regional assessment of stream temperatures across northern California and their relationship to various landscape-level and site-specific attributes (p. 400). Arcata, CA: Humboldt State University Foundation.
  • Martin, M. E., M. S. Delheimer, K. M. Moriarty, D. A. Early, K. A. Hamm, J. N. Pauli, T. N. McDonald, and P. N. Manley. 2022. Conservation of rare and cryptic species: challenges of uncertainty and opportunities for progress. Conservation Science and Practice 4:312809.
  • McDonald, T., House, M., Righter, P., & Lamphear, D. (2019, September). Effects of Riparian Canopy Reduction on Growth Rates of Salmonids and Amphibians in a Small Northern Coastal California Stream. In American Fisheries Society & The Wildlife Society 2019 Joint Annual Conference. AFS.
  • Miller, M. P., S. M. Haig, E. D. Forsman, R. G. Anthony, L. Diller, K. M. Dugger, A. B. Franklin, T. L. Fleming, S. Gremel, D. B. Lesmeister, M. Higley, D. R. Herter, and S. G. Sovern. 2018. Variation in inbreeding rates across the range of northern spotted owls (Strix occidentalis caurina); insights from over 30 years of monitoring data. The Auk: Ornithological Advances 135: 821-833. DOI: 10.1642/AUK-18-1.1.
  • Moriarty, K. M., J. Thompson, M. Delheimer, B. R. Barry, M. Linnell, T. Levi, K. Hamm, D. Early, H. Gamblin, M. S. Gunther, et al. 2021. Predicted distribution of a rare and understudied forest carnivore: Humboldt marten (Martes caurina humboldtensis). PeerJ 9:e11670.
  • Padgett, J. S., Kelsey, H. M., & Lamphear, D. (2019). Upper-plate deformation of Late Pleistocene marine terraces in the Trinidad, California, coastal area, southern Cascadia subduction zone. Geosphere, 15(4), 1323-1341.
  • Rockweit, J. T., J. M. Jenkins, J. E. Hines, J. D. Nichols, K. T. Dugger, A. B. Franklin, P. C. Carlson, W. L. Kendall, D. B. Lesmeister, C. McCafferty, S. H. Ackers, L. S. Andrews, L. L. Bailey, J. Burgher, K. P. Burnham, T. Chestnut, M. M. Conner, R. J. Davis, K. E. Dilione, E. D. Forsman, E. M. Glenn, S. A. Gremel, K. A. Hamm, D. R. Herter. J. M. Higley, R. B. Horn, D. W. Lamphear, T. L. McDonald, J. A. Reid, C. J. Schwarz, D. C. Simon, S. G. Sovern, J. K. Swingle, J. D. Wiens, H. Wise, C. B. Yackulic. 2022. Range-wide sources of variation in reproductive rates of northern spotted owls. Ecological Applications 33 (1): e2726. doi.org/10.1002/eap.2726.
  • Slauson, K. M., G. A. Schmidt, W. J. Zielinski, P. J. Detrich, R. L. Callas, J. Thrailkill, B. Devlin-Craig, D. A. Early, K. A. Hamm, K. N. Schmidt, A. Transou, and C. J. West. 2019. A conservation assessment and strategy for the Humboldt marten in California and Oregon. Gen. Tech. Rep. PSW-GTR-260. Arcata, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 124 p.
  • Thome, D. M., C. J. Zabel and L. V. Diller. 1999. Forest stand characteristics and reproduction of northern spotted owls in managed north-coastal California forests. Journal of Wildlife Management 63(1):44-59.
  • Thome, D. M., C. J. Zabel and L. V. Diller. 2000. Spotted owl turnover and reproduction in managed forest of north-coastal California. Journal of Field Ornithology 71(1):140-146.
  • Thompson, J.L. 2008. Density of fisher on managed timberlands in north coastal California. Thesis, Humboldt State University, Arcata, California.
  • Thompson, J. L., and L. V. Diller. 2002. Relative abundance, nest site characteristics, and nest dynamics of Sonoma tree voles on managed timberlands in coastal northwest California. Northwest Naturalist 83:91-100.
  • Wallace, R. L. and L. V. Diller. 1998. Length of the larval Cycle of Ascaphus truei in coastal streams of the Redwood Region, Northern California. Journal of Herpetology 32(3):404-409.
  • Woodward, J. S., D. W. Lamphear, and M. R. House. 2012. Delineation of preventative landslide buffers along steep streamside slopes in northern California. Pages 213-223. in Proceedings of coast redwood forests in a changing California: A symposium for scientists and managers. R. B. Standiford, T. J. Weller, D. D. Piirto, J. D. Stuart, technical coordinators. U.S. Department of Agriculture., Forest Service, Pacific Southwest Research Station, General Technical Report PSW-GTR-238, Albany, CA, USA.
  • Woodward, J. S., M. R. House, and D. L. Lamphear. 2016. Development of preventative streamside landslide buffers on managed timberlands in Northern CA. pages 149-161 in Proceedings of the Coast Redwood Sciences Symposium, 2016: Past Successes and Future Directions. General Technical Report, PSW-GTR-258, U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, Albany, CA.
  • Woodward, J. S., M. R. House, and D. L. Lamphear. 2014, Final steep streamside slope delineation results, Humboldt and Del Norte Counties, California. Green Diamond Resource Co, Unpublished report submitted to U.S. Fish and Wildlife and National Marine Fisheries Service, dated December 19, 2014.
  • Woodward, J. S. 2023. Shallow landslide erosion rates on industrially managed timberlands: key factors affecting historical and contemporary rates. Environmental and Engineering Geoscience 23(2): 1-17. doi.org/10.2113/EEG-D-22-00005.
  • Wiens, J. D., K. M. Dugger, J. M. Higley, D. B. Lesmeister, A. B. Franklin, K. A. Hamm, G. C. White, K. E. Dilione, D. C. Simon, R. R. Brown, P. C. Carlson, C. B. Yackulic, J. D. Nichols, J. E. Hines, R. J. Davis, D. W. Lamphear, C. McCafferty, T. L. McDonald, and S. G. Sovern. 2021. Invader removal triggers competitive release in a threatened avian predator. PNAS 118.doi:10.1073/pnas.2102859118.
  • Yackulic, C. B., L. L. Bailey, K. M. Dugger, R. J. Davis, A. Franklin, E. D. Forsman, S. H. Ackers, L. S. Andrews, B. L. Biswell, L. V. Diller, S. A. Gremel, K. A. Hamm, D. R. Herter, J. Mark Higley, R. B. Horn, C. McCafferty, J. A. Reid, J. T. Rockweit, and S. G. Sovern. 2019. The past and future roles of competition and habitat in the range-wide occupancy dynamics of Northern Spotted Owls. Ecological Applications 29(3):e01861. 10.1002/eap.1861

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