Leif Mortenson

Treesearch Publications

• Jackson Audley, Christopher J. Fettig, Jason E Moan, Jessie Moan, Leif Mortenson, Agenor Mafra-Neto. 2026. Dendroctonus rufipennis (Coleoptera: Curculionidae) responses to 4 doses of 3-methylcyclohex-2-en-1-one (MCH) in baited trapping assays
• Jackson Audley, Christopher J. Fettig, Jason Moan, Jessie Moan, Steve Swenson, Leif Mortenson, Agenor Mafra-Neto. 2025. Semiochemical interruption of Dendroctonus rufipennis (Coleoptera: Curculionidae) in Alaska and Colorado, U.S.
• Christopher J. Fettig, Jackson P. Audley, Leif Mortenson, Shakeeb Hamud, Robbie W. Flowers. 2025. The Lookout Mountain Thinning and Fuels Reduction Study, Central Oregon: Tree Mortality 2–9 Years After Treatments
• Jackson Audley, Christopher J. Fettig, Jason Moan, Jessie Moan, Steve Swenson, A Steven Munson, Leif Mortenson, Darren Blackford, Elizabeth Graham, Agenor Mafra-Neto. 2024. Developing semiochemical repellents for protecting Picea from Dendroctonus rufipennis (Coleoptera: Curculionidae) in Alaska and Utah, USA
• Emilio Vilanova, Leif Mortenson, Lauren E. Cox, Beverly M. Bulaon, Jamie Lydersen, Christopher J. Fettig, John J. Battles, Jodi N. Axelson. 2023. Characterizing ground and surface fuels across Sierra Nevada forests shortly after the 2012–2016 drought
• Zachary J. Robbins, Chonggang Xu, Alex Jonko, Rutuja Chitra-Tarak, Christopher J. Fettig, Jennifer Costanza, Leif Mortenson, Brian H. Aukema, Lara M. Kueppers, Robert M. Scheller. 2023. Carbon stored in live ponderosa pines in the Sierra Nevada will not return to pre-drought (2012) levels during the 21st century due to bark beetle outbreaks
• Zachary J. Robbins, Chonggang Xu, Brian H. Aukema, Polly C. Buotte, Rutuja Chitra‐Tarak, Christopher J. Fettig, Michael L. Goulden, Devin W. Goodsman, Alexander D. Hall, Charles D. Koven, Lara M. Kueppers, Gavin D. Madakumbura, Leif Mortenson, James A. Powell, Robert M. Scheller. 2022. Warming increased bark beetle‐induced tree mortality by 30% during an extreme drought in California
• Robert Progar, Christopher J. Fettig, A Steven Munson, Leif Mortenson, Cynthia Snyder, Sandra Kegley, Daniel Cluck, Brytten Steed, Agenor Mafra-Neto, Matthew J. Rinella. 2021. Comparisons of Efficiency of Two Formulations of Verbenone (4, 6, 6-trimethylbicyclo [3.1.1] hept-3-en-2-one) for Protecting Whitebark Pine, Pinus albicaulis (Pinales: Pinaceae) From Mountain Pine Beetle (Colopetera: Curculionidae)
• Michael J. Koontz, Andrew M. Latimer, Leif Mortenson, Christopher J. Fettig, Malcolm P. North. 2021. Cross-scale interaction of host tree size and climatic water deficit governs bark beetle-induced tree mortality
• Jackson P. Audley, Christopher J. Fettig, A. Steven Munson, Justin B. Runyon, Leif Mortenson, Brytten E. Steed, Kenneth E. Gibson, Carl L. Jørgensen, Stephen Mckelvey, Joel D. McMillin, Jose Negron. 2020. Impacts of mountain pine beetle outbreaks on lodgepole pine forests in the Intermountain West, U.S., 2004–2019
• Christopher J. Fettig, Leif Mortenson, Beverly M. Bulaon, Patra B. Foulk. 2019. Tree mortality following drought in the central and southern Sierra Nevada, California, U.S.
• Christopher J. Fettig, Laura Lowrey, Darren Blackford, Joel McMillin, A Steven Munson, Leif Mortenson. 2018. Efficacy of spring and fall treatments of carbaryl for protecting ponderosa pine from mortality attributed to mountain pine beetle (Coleoptera: Curculionidae)
• Leif Mortenson, Flint F. Hughes, James B. Friday, Lisa M. Keith, Jomar M. Barbosa, Nathanael J. Friday, Zhanfeng Liu, Travis Sowards. 2016. Assessing spatial distribution, stand impacts and rate of Ceratocystis fimbriata induced ‘ōhi‘a (Metrosideros polymorpha) mortality in a tropical wet forest, Hawai‘i Island, USA
• Christopher J. Fettig, Brytten Steed, Beverly Bulaon, Leif Mortenson, Robert Progar, Clifford Bradley, Steven Munson, Agenor Mafra-Neto. 2016. Efficacy of SPLAT® Verb for protecting individual Pinus contorta, Pinus ponderosa, and Pinus lambertiana from mortality attributed to Dendroctonus ponderosae
• Rich L. Turner, Leif Mortenson, James J. Halperin, Patricia N. Manley. 2013. Literature cited (PSW-GTR-246)
• Leif Mortenson, James J. Halperin, Patricia N. Manley, Rich L. Turner. 2013. Proceedings of the international workshop on monitoring forest degradation in Southeast Asia
• Patricia N. Manley, Leif Mortenson, James J. Halperin, Nguyen Hanh Quyen. 2013. Options for monitoring forest degradation in Northern Viet Nam: An assessment in systems design and capacity building needs in Con Cuong District, Nghe An Province
• Rick Turner, James Halperin, Patricia N. Manley, Leif Mortenson. 2013. Forest degradation sub-national assessments: Monitoring options for Cambodia, Lao PDR, and Vietnam
• Patricia N. Manley, Leif Mortenson, James Halperin, Rick Turner. 2013. Degradation activities, drivers, and emissions: US Forest Service LEAF Country Assessments

• Program
  

  Northern California Research Zone

  https://research.fs.usda.gov/psw/programs/northzone
  Station

  Pacific Southwest Research Station