USDA Forest Service

Pacific Southwest Research Station

Pacific Southwest
Research Station

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Albany, CA 94710-0011
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The publications below were posted from Pacific Southwest Research Station researchers between August and November 2020. There are many more publications produced by our scientists available through Treesearch.

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Featured publications:

Trees that line city streets and grow in front yards provide beauty, color, shade and a multitude of other benefits to urban areas, but their health and longevity depend heavily on the urban foresters, citizen scientists and volunteers who monitor and take care of them.

Researchers from Pacific Southwest Research Station and Northern Research Station partnered to author two publications and have produced companion videos that serve as guides for monitoring urban trees and helping ensure viability of urban forests over the long run.

Urban tree monitoring: a resource guide. van Doorn, Natalie S.; Roman, Lara A.; McPherson, E. Gregory; Scharenbroch, Bryant C.; Henning, Jason G.; Östberg, Johan P.A.; Mueller, Lee S.; Koeser, Andrew K.; Mills, John R.; Hallet, Richard A.; Sanders, John E.; Battles, John; Boyer, Debra J.; Fristensky, Jason P.; Mincey, Sarah K.; Peper, Paula J.; Vogt, Jessica M. 2020. Gen. Tech. Rep. PSW-GTR-266. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 132 p.

Urban tree monitoring: a field guide. Roman, Lara A.; van Doorn, Natalie S.; McPherson, E. Gregory; Scharenbroch, Bryant C.; Henning, Jason G.; Ӧstberg, Johan P.A.; Mueller, Lee S.; Koeser, Andrew K.; Mills, John R.; Hallett, Richard A.; Sanders, John E.; Battles, John J.; Boyer, Deborah J.; Fristensky, Jason P.; Mincey, Sarah K.; Peper, Paula J.; Vogt, Jess. 2020. Gen. Tech. Rep. NRS-194. Madison, WI: U.S. Department of Agriculture, Forest Service, Northern Research Station. 48 p.

Wildlife crossing structures have been shown to be one of the most effective means of reducing animal-vehicle collisions on highways, while facilitating essential animal movement across the landscape. Yet the widespread implementation of such structures, especially wildlife overpasses, has been hindered by their perceived and actual expense. This document compiles the resulting strategies and considerations to reduce or avoid costs, while maintaining or improving the overall efficacy of wildlife overpasses.

Innovative strategies to reduce the costs of effective wildlife overpasses. McGuire, Terry M.; Clevenger, Anthony P.; Ament, Robert; Callahan, Renee; Jacobson, Sandra 2020. Gen. Tech. Rep. PSW-GTR-267. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 30 p.

Featured news:

This study compared two different types of thinning – a 'High Variability' method that restored a structure with more of the trees in groups and groups intermixed with small gaps, similar to what forests of California, shaped by fire, once looked like, and a 'Low Variability' method with relatively evenly spaced individual trees. One goal of the 'High Variability' method was to create and accentuate habitat for forest dwelling plant and animal species. Half of the study units were also treated with prescribed fire. The study found both thinning methods were equally effective at reducing tree mortality and increasing tree growth.

Variable thinning and prescribed fire influence tree mortality and growth during and after a severe drought. Knapp, Eric E.; Bernal, Alexis A.; Kane, Jeffrey M.; Fettig, Christopher J.; North, Malcolm P. 2021. Conservation Biology. 479: 118595.

Publications by research area:

Inventory and Monitoring

Climatic sensitivity of species’ vegetative and reproductive phenology in a Hawaiian montane wet forest. Pau, Stephanie; Cordell, Susan; Ostertag, Rebecca; Inman, Faith; Sack, Lawren. 2020. Biotropica. 25(2): 143.

Pre-emptive detection of mature pine drought stress using multispectral aerial imagery. Grulke, Nancy; Maxfield, Jason; Riggan, Phillip; Schrader-Patton, Charlie. 2020. Remote Sensing. 12(14): 2338.

Pests and Pathogens

Evaluations of bole injections for protecting Engelmann spruce from mortality attributed to spruce beetle (Coleoptera: Curculionidae) in the Intermountain West. Fettig, Christopher J.; Munson, A. Steven; Grosman, Donald M.; Blackford, Darren C. 2020. Journal of Entomological Science. 55(3): 301-309.

Physical and chemical characteristics of blue and Engelmann spruce relative to spruce beetle host selection and colonization. Ott, Daniel S.; Fettig, Christopher J.; Munson, A. Steven; Runyon, Justin B.; Ross, Darrell W. 2020. Forest Ecology and Management. 479: 118577.

Verbenone inhibits attraction of Ips pini (Coleoptera: Curculionidae) to pheromone-baited traps in northern Arizona. Gaylord, Monica; McKelvey, Stephen; Fettig, Christopher; McMillin, Joel D. 2020. Journal of Economic Entomology. 19: 60.

Resource Management and Use

Assessing the ecological impacts of biomass harvesting along a disturbance severity gradient. Kurth, Valerie J.; D'Amato, Anthony W.; Bradford, John B.; Palik, Brian J.; Looney, Christopher E. 2020. Ecological Applications. 30(2): e02042. 11 p.

Characterization of fetterbush Lyonia lucida liquid extractions. Moore, Roderquita K.; Mann, Doreen; Matt, Frederick; Dietenberger, Mark; Weise, David. 2020. Res. Note FPL-RN-0385. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 10 p.

Evolutionary network genomics of wood formation in a phylogenetic survey of angiosperm forest trees. Zinkgraf, Matthew; Zhao, Shu‐Tang; Canning, Courtney; Gerttula, Suzanne; Lu, Meng‐Zhu; Filkov, Vladimir; Groover, Andrew. 2020. New Phytologist. 139: 963.

Forests on the edge: forest ecology in rapidly changing conditions. Waring, Kristen; Bradford, John; Looney, Christopher. 2020. Canadian Journal of Forest Research. 50(9): v-vi.

From treeline to species line: Thermal patterns and growth relationships across the krummholz zone of whitebark pine, Sierra Nevada, California, USA. Millar, Constance I; Delany, Diane L.; Westfall, Robert D. 2020. Arctic, Antarctic, and Alpine Research. 52(1): 390-407.

Host selection behavior mediated by differential landing rates of the walnut twig beetle, Pityophthorus juglandis, and associated subcortical insect species, on two western North American walnut species, Juglans californica and J. major. Lona, Irene D.; Miller, Donald G.; Hatfield, Colleen A.; Rosecrance, Richard C.; Nelson, Lori J.; Audley, Jackson P.; Siefker, Megan A.; Chen, Yigen; Seybold, Steven J. 2020. Entomologia Experimentalis et Applicata. 168(3): 240-258.

LANDISVIEW 2.0: An upgraded visualization and analytical tool for landscape modeling. Xi, Weimin; Zhou, Xiaohuan; Zhang, Jianwei. 2020. Environmental Modelling & Software. 134: 104849.

Measure twice, cut once: Optimal inventory and harvest under volume uncertainty and stochastic price dynamics. Sloggy, Matthew R.; Kling, David M.; Plantinga, Andrew J. 2020. Journal of Environmental Economics and Management. 103: 102357.

Precipitation is the most crucial factor determining the distribution of moso bamboo in Mainland China. Shi, Peijian; Preisler, Haiganoush K.; Quinn, Brady K.; Zhao, Jie; Huang, Weiwei; Röll, Alexander; Cheng, Xiaofei; Li, Huarong; Hölscher, Dirk 2020. Global Ecology and Conservation. 22: e00924.

Seedling response to water stress in valley oak (Quercus lobata) is shaped by different gene networks across populations. Mead, Alayna; Peñaloza Ramirez, Juan; Bartlett, Megan K.; Wright, Jessica W.; Sack, Lawren; Sork, Victoria L. 2019. Molecular Ecology. 28(24): 5248-5264.

Shifting perspectives in assessing socio-environmental vulnerability. Long, Jonathan W.; Steel, E. Ashley. 2020. Sustainability. 12(7): 2625.

Woody plant evolution: exceptional lianas reveal rules of woody growth. Groover, Andrew 2020. Current Biology. 30(2): R76-R78.

Water, Air and Soil

Ambient concentrations and total deposition of inorganic sulfur, inorganic nitrogen and base cations in the Athabasca Oil Sands Region. Edgerton, Eric S.; Hsu, Yu-Mei; White, Emily M.; Fenn, Mark E.; Landis, Matthew S. 2020. Science of The Total Environment. 706: 134864.

Analytical solutions to runoff on hillslopes with curvature: numerical and laboratory verification. Lapides, Dana A.; David, Cy; Sytsma, Anneliese; Dralle, David; Thompson, Sally. 2020. Hydrological Processes. 3(3): 142.

Changes in soil bacterial community diversity following the removal of invasive feral pigs from a Hawaiian tropical montane wet forest. Wehr, Nathaniel H.; Kinney, Kealohanuiopuna M.; Nguyen, Nhu H.; Giardina, Christian P.; Litton, Creighton M. 2019. Scientific Reports. 9(1): S3.

Effect of Silviculture on Carbon Pools during Development of a Ponderosa Pine Plantation. Zhang, Jie; Zhang, Jianwei; Mattson, Kim; Finley, Kaelyn. 2020. Forests. 11(9): 997.

Long-term hydrological response to forest harvest during seasonal low flow: Potential implications for current forest practices. Coble, Ashley A.; Barnard, Holly; Du, Enhao; Johnson, Sherri; Jones, Julia; Keppeler, Elizabeth; Kwon, Hyojung; Link, Timothy E.; Penaluna, Brooke E.; Reiter, Maryanne; River, Mark; Puettmann, Klaus; Wagenbrenner, Joseph. 2020. Science of The Total Environment. 730: 138926.

Mean annual temperature influences local fine root proliferation and arbuscular mycorrhizal colonization in a tropical wet forest. Pierre, Suzanne; Litton, Creighton M.; Giardina, Christian; Sparks, Jed P.; Fahey, Timothy J. 2020. Ecology and Evolution. 267(3): e4794.

Measuring and modeling gravel transport at Caspar Creek, CA, to detect changes in sediment supply, storage, and transport efficiency. Richardson, P. W.; Wagenbrenner, J. W.; Sutherland, D. G.; Lisle, T. E. 2020. Water Resources Research. 56(6): e2019WR026389.

Predicting plant-soil feedback in the field: meta-analysis reveals that competition and environmental stress differentially influence PSF. Beals, Kendall K.; Moore, Jessica A. M.; Kivlin, Stephanie N.; Bayliss, Shannon L. J.; Lumibao, Candice Y.; Moorhead, Leigh C.; Patel, Megan; Summers, Jennifer L.; Ware, Ian M.; Bailey, Joseph K.; Schweitzer, Jennifer A. 2020. Frontiers in Ecology and Evolution. 8: 660.

Wildland Fire and Fuels

A computational study of burning of vertically oriented leaves with various fuel moisture contents by upward convective heating. Borujerdi, Peyman Rahimi; Shotorban, Babak; Mahalingam, Shankar. 2020. Fuel. 276: 118030.

Do fuel treatments in U.S. national forests reduce wildfire suppression costs and property damage? Sánchez, J.; Loomis, J.; González-Cabán, A.; Rideout, D.; Reich, R. 2019. Journal of Natural Resources Policy Research. 9(1): 42-73.

Forest stand and site characteristics influence fuel consumption in repeat prescribed burns. Levine, Jacob I; Collins, Brandon M.; York, Robert A.; Foster, Daniel E.; Fry, Danny L.; Stephens, Scott L. 2020. International Journal of Wildland Fire. 29(2): 148-159.

Forest vegetation change and its impacts on soil water following 47 Years of managed wildfire. Stevens, Jens T.; Boisramé, Gabrielle F. S.; Rakhmatulina, Ekaterina; Thompson, Sally E.; Collins, Brandon M.; Stephens, Scott L. 2020. Ecosystems. 17(1): 180099.

Fuel dynamics and reburn severity following high-severity fire in a Sierra Nevada, USA, mixed-conifer forest. Lydersen, Jamie M.; Collins, Brandon M.; Coppoletta, Michelle; Jaffe, Melissa R.; Northrop, Hudson; Stephens, Scott L. 2019. Fire Ecology. 15: 43.

Land ownership impacts post-wildfire forest regeneration in Sierra Nevada mixed-conifer forests. Stephens, Connor W.; Collins, Brandon M.; Rogan, John 2020. Forest Ecology and Management. 468: 118161.

Local forest structure variability increases resilience to wildfire in dry western U.S. coniferous forests. Koontz, Michael J.; North, Malcolm P.; Werner, Chhaya M.; Fick, Stephen E.; Latimer, Andrew M. 2020. Ecology Letters. 23(3): 483-494.

Multi-scaled drivers of severity patterns vary across land ownerships for the 2013 Rim Fire, California. Povak, Nicholas A.; Kane, Van R.; Collins, Brandon M.; Lydersen, Jamie M.; Kane, Jonathan T. 2020. Landscape Ecology. 35(2): 293-318.

New methods for pyrolysis and combustion properties of forest litter: enhanced cone calorimetry with longleaf pine needles. Dietenberger, Mark A.; Boardman, Charles R.; Weise, David R. 2020. Proceedings of the Fire Continuum Conference. 21-24 May 2018, Missoula, MT. Proc. RMRS-P-78. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 358 p.

Perspectives from a long-term study of fuel reduction and forest restoration in the Sierra Nevada. Collins, Brandon M.; Stephens, Scott L.; York, Robert A. 2019. Tree Rings. 29: 7-9.

Potential wildfire and carbon stability in frequent‐fire forests in the Sierra Nevada: trade‐offs from a long‐term study. Foster, Daniel E.; Battles, John J.; Collins, Brandon M.; York, Robert A.; Stephens, Scott L. 2020. Ecosphere. 11(8): e03198.

Strong legacy effects of prior burn severity on forest resilience to a high-severity fire. Harris, Lucas B.; Drury, Stacy A.; Taylor, Alan H. 2020. Ecosystems. 113: 11770.

Thermal degradation modeling of live vegetation for fire dynamic simulator. Dietenberger, Mark A.; Boardman, Charles R.; Shotorban, Babak; Mell, William; Weise, David R. 2020. In: Proceedings, 2020 Spring Technical Meeting, Central States Section of the Combustion Institute: 1-20.

Wildfire severity and postfire salvage harvest effects on long‐term forest regeneration. Povak, Nicholas A.; Churchill, Derek J.; Cansler, C. Alina; Hessburg, Paul F.; Kane, Van R.; Kane, Jonathan T.; Lutz, James A.; Larson, Andrew J. 2020. Ecosphere. 11(8): 15.

Wildlife and Fish

Bridging levels from individuals to communities and ecosystems: including adaptive behavior and feedbacks in ecological theory and models. Railsback, Steven F.; Berger, Uta; Giske, Jarl; Hagstrom, George I.; Harvey, Bret C.; Semeniuk, Christina; Grimm, Volker 2020. The Bulletin of the Ecological Society of America. 101(1): e01648.

Contingent trade-off decisions with feedbacks in cyclical environments: testing alternative theories. Railsback, Steven; Harvey, Bret; Ayllón, Daniel 2020. Behavioral Ecology. 70: 980.

Designing environmental DNA surveys in complex aquatic systems: Backpack sampling for rare amphibians in Sierra Nevada meadows. Pope, Karen L.; Goldberg, Caren S.; Nelson, Nicolette L.; Cummings, Adam K.; Seaborn, Travis; Piovia‐Scott, Jonah 2020. Aquatic Conservation: Marine and Freshwater Ecosystems. 3: 28.

Detecting small changes in populations at landscape scales: a bioacoustic site-occupancy framework. Wood, Connor M.; Popescu, Viorel D.; Klinck, Holger; Keane, John J.; Gutiérrez, R.J.; Sawyer, Sarah C.; Peery, M. Zachariah. 2019. Ecological Indicators. 98: 492-507.

How to make meadow restoration work for California’s mountain frogs? Pope, Karen; Yarnell, Sarah; Piovia-Scott, Jonah 2019. Proceedings of the 4th Joint Federal Interagency Sedimentation and Hydrologic Modeling Conference, Reno, NV.

Identifying natural catchment landscape influences on tropical stream organisms: classifying stream reaches of the Hawaiian Islands. Tingley, Ralph W.; Infante, Dana M.; MacKenzie, Richard A.; Cooper, Arthur R.; Tsang, Yin-Phan 2019. Hydrobiologia. 826(1): 67-83.

Mechanistic simulations predict that thermal and hydrological effects of climate change on Mediterranean trout cannot be offset by adaptive behaviour, evolution, and increased food production. Ayllón, Daniel; Railsback, Steven F.; Harvey, Bret C.; García Quirós, Inmaculada; Nicola, Graciela G.; Elvira, Benigno; AlmodÓvar, Ana. 2019. Science of The Total Environment. 693: 133648.

Metrics of disturbance in a redwood forest ecosystem: responses of stream amphibians to repeated sediment infusions. Welsh, Hartwell H.; Cummings, Adam K.; Hodgson, Garth R. 2019. Ecosphere. 10(10): e02886.

Population dynamics of Rana sierrae at Dusy Basin: influence of non‐native predators, drought, and restoration potential. Wilkins, Laetitia G.E.; Matthews, Kathleen R.; Steel, Zachary L.; Nusslé, Sébastien C.; Carlson, Stephanie M. 2019. Ecosphere. 10(11): e02951.

Resource selection by GPS-tagged California spotted owls in mixed-ownership forests. Atuo, Fidelis A.; Roberts, Kevin; Whitmore, Sheila; Dotters, Brian P.; Raphael, Martin G.; Sawyer, Sarah C.; Keane, John J.; Gutiérrez, R.J.; Zachariah Peery, M. 2019. Forest Ecology and Management. 433: 295-304.

Stable isotopes reveal unexpected relationships between fire history and the diet of Spotted Owls. Hobart, Brendan K.; Kramer, H. Anu; Jones, Gavin M.; Dotters, Brian P.; Whitmore, Sheila A.; Keane, John J.; Peery, M. Zachariah. 2020. Ibis. 30: 1022.

The role of predictive model data in designing mangrove forest carbon programs. Bukoski, Jacob; Elwin, Angie; MacKenzie, Richard; Sharma, Sahadev; Purbopuspito, Joko; Kopania, Benjamin; Apwong, Maybeleen; Poolsiri, Roongreang; Potts, Matthew D. 2020. Environmental Research Letters. 15(8): 084019.

Using a space‐for‐time substitution approach to predict the effects of climate change on nutrient cycling in tropical island stream ecosystems. Frauendorf, Therese C.; MacKenzie, Richard A.; Tingley, Ralph W.; Infante, Dana M.; El‐Sabaawi, Rana W. 2020. Limnology and Oceanography. 49: 2.

Using the ecological significance of animal vocalizations to improve inference in acoustic monitoring programs. Wood, Connor M.; Klinck, Holger; Gustafson, Michaela; Keane, John J.; Sawyer, Sarah C.; Gutiérrez, R. J.; Peery, M. Zachariah. 2020. Conservation Biology.

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