Treesearch
Displaying 1 - 10 of 63,160 Publications- Native bee populations are declining worldwide, threatening both natural ecosystems and agriculture as these insects pollinate about 80 percent of all flowering plants. Research at the Starkey Experimental Forest and Range, managed by the U.S. Department of Agriculture, Forest Service, points to strategies for supporting native bees while maintaining grazing and timber production. Scientists with the Forest Service’s Pacific Northwest Research Station and Oregon State University identified more than 300 native bee species at the study site in eastern Oregon. They found that bees rely heavily ...AuthorsSylvia Kantor, Mary Rowland, Sandy DeBanoKeywordsSourceScience Findings 273. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 6 p.Year2025
- ArrayAuthorsWilliam R.L. Anderegg, Steven A. KannenbergSourceAnderegg, William R.L.; Kannenberg, Steven A. 2025. Linking physiology to landscape-scale dieback of Utah juniper during an ongoing megadrought. In: Conkling, B.L.; Pandit, K., eds. Forest Health Monitoring: Evaluation Monitoring project summaries 2023. Gen. Tech. Rep. WO-105a. Washington, DC: U.S. Department of Agriculture, Forest Service. 75–79. Chapter 9.Year2025
- ArrayAuthorsKelly S. Burns, Megan M. DudleySourceBurns, Kelly S.; Dudley, Megan M. 2025. Health and abundance of five-needle pines in southern Colorado and northern New Mexico. In: Conkling, B.L.; Pandit, K., eds. Forest Health Monitoring: Evaluation Monitoring project summaries 2023. Gen. Tech. Rep. WO-105a. Washington, DC: U.S. Department of Agriculture, Forest Service. 63–74. Chapter 8.Year2025
- ArrayAuthorsGary Ervin, Adrián Lázaro-LoboSourceErvin, Gary; Lázaro-Lobo, Adrián. 2025. Evaluating distribution and impacts of invasive plant species on Southern U.S. Forests. In: Conkling, B.L.; Pandit, K., eds. Forest Health Monitoring: Evaluation Monitoring project summaries 2023. Gen. Tech. Rep. WO-105a. Washington, DC: U.S. Department of Agriculture, Forest Service. 53–61.Year2025
- ArrayAuthorsW. Andrew Whittier, Robert M. Jetton, James R. RheaSourceWhittier, W. Andrew; Jetton, Robert M.; Rhea, James R. 2025. Carolina hemlock distribution and health in the Southern Appalachian Mountains. Conkling, B.L.; Pandit, K., eds. Forest Health Monitoring: Evaluation Monitoring project summaries 2023. Gen. Tech. Rep. WO-105a. Washington, DC: U.S. Department of Agriculture, Forest Service. 31–39. Chapter 5. https://doi.org/10.2737/WO-GTR-105aChap5.Year2025
Long-term tree population growth can predict woody encroachment patterns
Formally Refereed
Recent increases in woody plant density in dryland ecosystems - or “woody encroachment”- around the world are often attributed to land-use changes such as increased livestock grazing and wildfire suppression or to global environmental trends (e.g., increasing atmospheric carbon dioxide). While such changes have undoubtedly impacted ecosystem structure and function, the evidence linking them to woody encroachment is mixed, and the underlying processes are not fully understood. To clarify the role of demographic processes in changing woody plant abundance, we conducted a meta-analysis of tree ag...AuthorsRobert K. Shriver, Elise Pletcher, Franco Biondi, Alexandra K. Urza, Peter J. WeisbergSourceProceedings of the National Academy of Science. 122(18): e2424096122.Year2025Fire directly affects tree carbon balance and indirectly affects hydraulic function: Consequences for post-fire mortality in two conifers
Formally Refereed
-- The mechanistic links between fire-caused injuries and post-fire tree mortality are poorly understood. Current hypotheses differentiate effects of fire on tree carbon balance and hydraulic function, yet critical uncertainties remain about the relative importance of each and how they interact. -- We utilize two prescribed burns with Douglas-fir and ponderosa pine to examine: the relative evidence for fire-caused changes in hydraulic function and carbon dynamics, and how such impacts relate to fire injuries; which impacts most likely lead to post-fire mortality; and how these impacts vary by ...AuthorsCharlotte C. Reed, Sharon M. Hood, Aaron R. Ramirez, Anna SalaKeywordsSourceNew Phytologist. https://doi.org/10.1111/nph.70212.Year2025- Survival of perennial grasses between wet seasons depends on the maintenance of belowground buds and root systems. Belowground bud and root traits were evaluated in three perennial grasses (Pennisetum mezianum (Leeke), Digitaria macroblephara (Hack. ex Schinz) Paoli, and Themeda triandra (Forssk.) in semi-arid Kenyan rangelands during the short dry season. Bud number remained stablae while bud size declined for all three grass species during the study period. Non-structural carbohydrates in roots and percent root dry matter had increased in all three species by the end of the dry season. Penni...AuthorsEdwin M. Kakusu, R.N. Kinuthia, Jacqueline P. Ott, O.K. KoechSourceJournal of Range and Forage Science. 42: 1-12.Year2025
- Myrtle rust caused by Austropuccinia psidii is one of the most important diseases affecting eucalypts (Eucalyptus spp. and Corymbia spp.) in Brazil. Asexual spores of the myrtle pathogen, urediniospores, give rise to infection of young tissues (e.g., leaf, stem, flower and fruit) of the myrtaceous hosts. Symptoms of myrtle rust disease are necrosis and leaf deformation, and death of the apical shoots, whereas the primary diagnostic signs of myrtle rust disease are yellow urediniospores, which are formed by the myrtle rust pathogen on the infected organs. Occasionally, teliospores are formed in...AuthorsRosiane F. Almeida, Joao Vitor P. V Ferreira, Vitor M. Sousa, Rafael F. Alfenas, Ned B. Klopfenstein, Acelino C. AlfenasKeywordsSourceForest Pathology. 55: e70023.Year2025
- Fuels treatments intended to reduce fuel loads and improve forest health on public lands offer one way to reduce wildfire hazards in the wildland-urban interface (WUI), where the natural and built environments meet. However, for fuels treatment implementation to be successful, it must comply with regulatory and scientific standards and be supported by local communities, as lack of acceptance can lead to alterations, delays, or abandonment. To foster support, public land managers can engage directly with residents in communities near treatment areas through various communication channels or eng...AuthorsKelly Wallace, Hannah Brenkert-Smith, Patricia A. Champ, James R. Meldrum, Grant Webster, Christine Taniguchi, Julia B. Goolsby, Colleen Donovan, Carolyn Wagner, Christopher M. Barth, Josh Kuehn, Suzanne WittenbrinkKeywordsSourceForest Policy and Economics. 176: 103537.Year2025