USDA Forest Service

Pacific Southwest Research Station

Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
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Research Spotlight

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The publications below were posted from Pacific Southwest Research Station researchers between May 2021 and July 2021. There are many more publications produced by our scientists available through Treesearch.

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Featured publications:

This report explores the opportunity to renovate an extensive road network from one that is designed to serve the needs of people to one that also proactively accounts for the needs of wildlife, while increasing the safety of both. The many challenges to implementing a systematic approach to wildlife mitigation are explored, including how long-range transportation plans often lack information on wildlife needs and easily implementable opportunities that are often missed.

Highway crossing structures for wildlife: opportunities for improving driver and animal safety. Ament, R.; Jacobson, Sandra; Callahan, R.; Brocki, M. 2021. Gen. Tech. Rep. PSW-GTR-271. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 51 p.

Field monitoring of urban trees is essential to learning how urban forests change over time. Many arborists and urban forest managers worldwide seek to understand how their tree systems are faring in terms of growth, health, and mortality. How successful is an urban tree planting program with respect to mortality and survival? Has the tree species composition or total number of trees changed across a city or neighborhood? How much have the trees themselves grown? Long-term data collection can provide valuable information for urban forestry practitioners and researchers interested in these questions.

New USDA Forest Service monitoring guides emphasize tracking individual trees to assess change over time. van Doorn, Natalie S.; Roman, Lara A. 2021. Arborist News. 30(3): 46-51.

Publications by research area:

Inventory and Monitoring

Arbuscular mycorrhizal trees influence the latitudinal beta-diversity gradient of tree communities in forests worldwide. Zhong, Yonglin; Chu, Chengjin; Myers, Jonathan A.; Gilbert, Gregory S.; Lutz, James A.; Stillhard, Jonas; Zhu, Kai; Thompson, Jill; Baltzer, Jennifer L.; He, Fangliang; LaManna, Joseph A.; Davies, Stuart J.; Aderson-Teixeira, Kristina J.; Burslem, D. 2021. Nature Communications. 12(1): 3137.

Density dependence influences competition and hybridization at an invasion front. Wood, Connor M.; Kryshak, Nick; Gustafson, Michaela; Hofstadter, Daniel F.; Hobart, Brendan K.; Whitmore, Sheila A.; Dotters, Brian P.; Roberts, Kevin N.; Keane, John J.; Sawyer, Sarah C.; Gutiérrez, Rocky J.; Peery, M. Zachariah. 2021. Diversity and Distributions. 27(5): 901-912.

Disruption of the competitive balance between foundational tree species by interacting stressors in a temperate deciduous forest. Cleavitt, Natalie L.; Battles, John J.; Fahey, Timothy J.; van Doorn, Natalie S. 2021. Journal of Ecology. 18(547): 660.

Genome-wide variation in DNA methylation predicts variation in leaf traits in an ecosystem-foundational oak species. Browne, Luke; MacDonald, Brandon; Fitz-Gibbon, Sorel; Wright, Jessica W.; Sork, Victoria L. 2021. Forests. 12(5): 569.

Species mixture effects and climate influence growth, recruitment and mortality in Interior West USA Populus tremuloides-conifer communities. Looney, Christopher E.; Previant, Wilfred J.; Bradford, John B.; Nagel, Linda M. 2021. Journal of Ecology.

Pests and Pathogens

Conifer bark beetles. Fettig, Christopher J.; Audley, Jackson P. 2021. Current Biology. 31(9): R419-R420.

Nutrient-use strategy and not competition determines native and invasive species response to changes in soil nutrient availability. Knauf, Amanda E.; Litton, Creighton M.; Cole, Rebecca J.; Sparks, Jed P.; Giardina, Christian P.; Gerow, Kenneth G.; Quiñones-Santiago, Melanie. 2021. Restoration Ecology. 6: 52.

Successful management of invasive rats across a fragmented landscape. Barney, Sarah; Leopold, Devin; Francisco, Kainana; Flaspohler, David; Fukami, Tadashi; Giardina, Christian; Gruner, Daniel; Knowlton, Jessie; Pitt, William; Wilson Rankin, Erin E. 2021. Environmental Conservation. Environmental Conservation. 30: 1-8.

The scope and severity of white-nose syndrome on hibernating bats in North America. Cheng, Tina L.; Reichard, Jonathan D.; Coleman, Jeremy T. H.; Weller, Theodore J.; Thogmartin, Wayne E.; Reichert, Brian E.; Bennett, Alyssa B.; Broders, Hugh G.; Campbell, Joshua; Etchison, Katherine; Feller, Daniel J.; Geboy, Richard; Hemberger, Trac. 2021. Conservation Biology.

Resource Management and Use

A new remote sensing-based carbon sequestration potential index (CSPI): A tool to support land carbon management. Pascual, Adrián; Giardina, Christian P.; Selmants, Paul C.; Laramee, Leah J.; Asner, Gregory P. 2021. Forest Ecology and Management. 494(3): 119343.

Effects of postfire climate and seed availability on postfire conifer regeneration. Stewart, Joseph A. E.; Mantgem, Phillip J.; Young, Derek J. N.; Shive, Kristen L.; Preisler, Haiganoush K.; Das, Adrian J.; Stephenson, Nathan L.; Keeley, Jon E.; Safford, Hugh D.; Wright, Micah C.; Welch, Kevin R.; Thorne, James H. 2021. Ecological Applications. 31(3): e02280.

Live fast, die young: Climate shifts may favor Great Basin bristlecone pine or limber pine in sub-alpine forest establishment. Smithers, Brian V; Alongi, Franklin; North, Malcolm P. 2021. Forest Ecology and Management. 494(3): 119339.

Plant your street! A research game exploring tree selection and placement in an urban neighborhood. Davis, Nora; Winter, Patricia L. 2021. Urban Forestry & Urban Greening. 64(1): 127244.

Tree canopies reflect mycorrhizal composition. Sousa, Daniel; Fisher, Joshua B.; Galvan, Fernando Romero; Pavlick, Ryan P.; Cordell, Susan; Giambelluca, Thomas W.; Giardina, Christian P.; Gilbert, Gregory S.; Imran-Narahari, Faith; Litton, Creighton M.; Lutz, James A.; North, Malcolm P.; Orwig, Dav. 2021. Geophysical Research Letters. 48(10): e2021GL092764.

Technical note: Accounting for snow in the estimation of root zone water storage capacity from precipitation and evapotranspiration fluxes. Dralle, David N.; Hahm, W. Jesse; Chadwick, K. Dana; McCormick, Erica; Rempe, Daniella M. 2021. Hydrology and Earth System Sciences. 25(5): 2861-2867.

Valuing the impacts of forest disturbances on ecosystem services: An examination of recreation and climate regulation services in U.S. national forests Sánchez, José J.; Marcos-Martinez, Raymundo; Srivastava, Lorie; Soonsawad, Natthanij. 2021. Trees, Forests and People. 5(6): 100123.

Wild bee response to application of the Douglas-fir beetle anti-aggregation pheromone, 3-methylcyclohex-2-en-1-one. Foote, Gabriel; Runyon, Justin; Fettig, Christopher; Foote, Nathaniel; Ross, Darrell W. 2021. Journal of Economic Entomology.

Water, Air and Soil

A complex patterned-ground ecosystem in the Sierra Nevada, California, USA supports unusual habitat for American pika. Millar, Constance I; Westfall, Robert D. 2021. Arctic, Antarctic, and Alpine Research. 53(1): 148-176.

A field-based experiment on the influence of stand density reduction on watershed processes at the Caspar Creek Experimental Watersheds in Northern California. Dymond, Salli F.; Richardson, Paul W.; Webb, Lynn A.; Keppeler, Elizabeth T.; Arismendi, Ivan; Bladon, Kevin D.; Cafferata, Peter H.; Dahlke, Helen E.; Longstreth, David L.; Brand, Patrick K.; Ode, Peter R.; Surfleet, Christopher G.; Wagenbrenner, Joseph. 2021. Frontiers in Forests and Global Change. 4: 691732.

Climate-driven divergence in plant-microbiome interactions generates range-wide variation in bud break phenology. Ware, Ian M.; Van Nuland, Michael E.; Yang, Zamin K.; Schadt, Christopher W.; Schweitzer, Jennifer A.; Bailey, Joseph K. 2021. Communications Biology. 4(1): 748.

How realistic are water-balance closure assumptions? A demonstration from the southern sierra critical zone observatory and kings river experimental watersheds. Safeeq, Mohammad; Bart, Ryan R.; Pelak, Norman F.; Singh, Chandan K.; Dralle, David N.; Hartsough, Peter; Wagenbrenner, Joseph W. 2021. Hydrological Processes. 35(5): e14199.

Interannual variation in rainfall modulates temperature sensitivity of carbon allocation and flux in a tropical montane wet forest. Lyu, Maokui; Giardina, Christian P.; Litton, Creighton M. 2021. Global Change Biology. 27(16): 3824-3836.

Investigating linkages between the size-growth relationship and drought, nitrogen deposition, and structural complexity in western U.S. Forests. Looney, Christopher E.; D'Amato, Anthony W.; Jovan, Sarah. 2021. Forest Ecology and Management. 497(40): 119494.

Restoration benefits of soil nutrient manipulation and weeding in invaded dry and wet tropical ecosystems in Hawai'i. Cole, Rebecca J.; Soper, Fiona M.; Litton, Creighton M.; Knauf, Amanda E.; Sparks, Kimberlee; Gerow, Kenneth G.; Giardina, Christian P.; Sparks, Jed P. 2021. Restoration Ecology. 18: 1464.

Stream water chemistry in mixed-conifer headwater basins: Role of water sources, seasonality, watershed characteristics, and disturbances. Yang, Yang; Hart, Stephen C.; McCorkle, Emma P.; Stacy, Erin M.; Barnes, Morgan E.; Hunsaker, Carolyn T.; Johnson, Dale W.; Berhe, Asmeret Asefaw. 2021. Ecosystems.

The Kings River Experimental Watersheds: Infrastructure and data. Wagenbrenner, Joseph W.; Dralle, David N.; Safeeq, Mohammad; Hunsaker, Carolyn T. 2021. Hydrological Processes. 35(5): e2254.

The relationship between topography, bedrock weathering, and water storage across a sequence of ridges and valleys. Pedrazas, Michelle A.; Hahm, W. Jesse; Huang, Mong-Han; Dralle, David; Nelson, Mariel D.; Breunig, Rachel E.; Fauria, Kristen E.; Bryk, Alexander B.; Dietrich, William E.; Rempe, Daniella M. 2021. Journal of Geophysical Research: Earth Surface. 126(4): 217.

Wildland Fire and Fuels

Contrasting the role of human- and lightning-caused wildfires on future fire regimes on a Central Oregon landscape. Barros, Ana M. G.; Day, Michelle A.; Preisler, Haiganoush K.; Abatzoglou, John T.; Krawchuk, Meg A.; Houtman, Rachel; Ager, Alan A. 2021. Environmental Research Letters. 16: 064081.

Do forest fuel reduction treatments confer resistance to beetle infestation and drought mortality? Steel, Z. L.; Goodwin, M. J.; Meyer, M. D.; Fricker, G. A.; Zald, H. S. J.; Hurteau, M. D.; North, M. P. 2021. Ecosphere. 12(1): e03344.

Longer-term impacts of fuel reduction treatments on forest structure, fuels, and drought resistance in the Lake Tahoe Basin. Low, Kathryn E.; Collins, Brandon M.; Bernal, Alexis; Sanders, John E.; Pastor, Dylan; Manley, Patricia; White, Angela M.; Stephens, Scott L. 2021. Forest Ecology and Management. 479: 118609.

Quantifying pyrodiversity and its drivers. Steel, Zachary L.; Collins, Brandon M.; Sapsis, David B.; Stephens, Scott L. 2021. Proceedings of the Royal Society B: Biological Sciences. 288(1948): 20203202.

Spatial simulation of forest road effects on hydrology and soil erosion after a wildfire. Cao, Longxi; Elliot, William; Long, Jonathan W. 2021. Hydrological Processes. 35(6): e14139.

Wildlife and Fish

Elevational gradients strongly mediate habitat selection patterns in a nocturnal predator? Kramer, H. Anu; Jones, Gavin M.; Kane, Van R.; Bartl-Geller, Bryce; Kane, Jonathan T.; Whitmore, Sheila A.; Berigan, William J.; Dotters, Brian P.; Roberts, Kevin N.; Sawyer, Sarah C.; Keane, John J.; North, Malcolm P.; Gutierrez, R. J.; Peery, M. Zachar. 2021. Ecosphere. 12(5): e03500.

Genomic signatures of demographic declines in an imperiled amphibian inform conservation action. Hardy, B. M.; Pope, K. L.; Latch, E. K. 2021. Animal Conservation. 19: 341.

Growth response of Great Basin limber pine populations to climate variability over the past 4002 years. Millar, Constance I; Delany, Diane L.; King, John C.; Westfall, Robert D. 2021. Quaternary Research. 8: 1-22.

Importance of the daily light cycle in population–habitat relations: A simulation study. Railsback, Steven F.; Harvey, Bret C.; Ayllón, Daniel. 2021. Transactions of the American Fisheries Society. 150(1): 130-143.

Landscape use by fishers (Pekania pennanti): core areas differ in habitat than the entire home range. Kordosky, Jennifer R.; Gese, Eric M.; Thompson, Craig M.; Terletzky, Patricia A.; Purcell, Kathryn L.; Schneiderman, Jon D. 2021. Canadian Journal of Zoology. 99(4): 289-297.

Recent, small beginnings: genetic analysis suggests Catostomus rimiculus (Klamath smallscale sucker) in the Smith River, California, are introduced. Kinziger, Andrew P.; White, Jason L.; Nakamoto, Rodney J.; Harvey, Bret C. 2021. Journal of Fish Biology. 98(5): 1321-1328.

U.S. Forest Service Research and Development Monthly News and Highlights