Treesearch
Displaying 871 - 880 of 65,140 Publications- The Anthropocene is defined by rapid environmental changes such as biological invasions and shifting disturbance regimes that threaten native species. Understanding the drivers of endangerment for species facing multiple simultaneous threats is challenging without experimental methods. Here, we examined the relative and combined effects of severe wildfires and an early‐stage barred owl ( Strix varia ) invasion on an assemblage of three native forest owl species in the Sierra Nevada, California, USA, leveraging manipulative (lethal barred owl removals) and natural (severe wildfires)...AuthorsJoshua M. Barry, Connor M. Wood, Gavin M. Jones, Kate A. McGinn, Kevin G. Kelly, H. Anu Kramer, Daniel F. Hofstadter, Stefan Kahl, Holger Klinck, Nicholas F. Kryshak, Brian P. Dotters, Kevin N. Roberts, John J. Keane, Elizabeth Ng, M. Zachariah PeeryKeywordsSourceEcological ApplicationsYear2025
- Disturbance creates structural legacies that are important drivers of functional and compositional stabilities in forested ecosystems. We used an experimental ice storm disturbance to evaluate effects of disturbance severity on structural legacies and their functional consequences. We evaluated canopy structural characteristics (height, density, openness, and complexity) before and after disturbance using data from terrestrial LiDAR. We compared trajectories of structural characteristics and functional outcomes (composition, mortality, and productivity) among treatments and relative to...AuthorsRobert T. Fahey, John Campbell, Lindsey Rustad, Charles T. Driscoll, Paul SchabergSourceCanadian Journal of Forest ResearchYear2025
- Many small mammal populations exhibit dramatic annual fluctuations, with abundance sometimes varying by orders of magnitude across years. However, there remains much debate about the factors that drive changes in abundance. Long-term datasets provide important opportunities to further investigate these phenomena. Using 30 yr of data from a study at Bartlett Experimental Forest in north-central New Hampshire, USA, we compare the relative effects of pulsed food resources (beech mast), forest structure, and weather on the population dynamics of 5 rodents and 4 shrew species. We estimated...AuthorsJoshua S. Willems, Remington J. Moll, Mariko Yamasaki, Chris Costello, Mark J Ducey, Rebecca J RoweKeywordsSourceJournal of MammalogyYear2025
- Wood that is resistant to fungal degradation is highly desirable, and chemical acetylation is one way to inhibit wood decay. The open question is whether acetylation inhibits decay strictly by reducing moisture content within the cell wall or if specific interactions with the acetyl group hinder motion within the cell wall and further inhibit decay. We investigate these hypotheses through molecular simulation, acetylating exposed hemicellulose and lignin hydroxyl groups in a secondary plant cell wall model. By comparing diffusion within the model, we find that acetyl group interactions...AuthorsMurtaza Barkarar, Daipayan Sarkar, Christopher G. Hunt, Josh V. VermaasKeywordsSourceBiomacromoleculesYear2025
- Anoplophora glabripennis Motschulsky is an invasive woodboring beetle in North America and Europe that threatens a broad range of tree genera. Eradication is a costly and time-consuming process that requires visual surveys to detect beetle damage on host trees. Knowing the distribution of beetle damage within trees could directly benefit survey efforts by focusing surveys on high-risk areas and indirectly by identifying habitat factors that structure beetle populations. In the A. glabripennis infestation in South Carolina, we identified an isolated and actively growing subpopulation on an...AuthorsMeredith S. Bean, R. Talbot Trotter III, Robert Ritger, Kyle Barrett, Scott E. Pfister, David R. CoyleKeywordsSourceEnvironmental EntomologyYear2025
- In the national forest inventory of the USA, there is an ongoing issue with sample plots that are either completely or partially unmeasured due to access issues such as hazardous conditions or lack of permission. The nonrandom nature of the nonresponse in the general population potentially creates a bias in the sample and resulting estimations. A potential mitigation option is the use of response homogeneity groups in combination with ratio-to-size estimators. This paper presents an extension of this approach where per-unit area estimates commonly useful to practitioners, e.g. number of...AuthorsJim Westfall, Paul L. PattersonSourceForestry: An International Journal of Forest ResearchYear2025
- Background: Fires can alter soil properties via downward heat transfer. Numerous studies have examined effects of wildfires and prescribed burns on soils, yet knowledge of the soil temperatures and durations reached is limited. This can lead to erroneous assumptions regarding fire impacts, especially when laboratory heating results are extrapolated to field conditions.Aims and methods: We compiled new and published data on maximum temperatures and heating durations for mineral soils during wildfires and prescribed burns in forests, shrublands and grasslands around the globe, and compared...AuthorsStefan H. Doerr, Antonio Girona-García, Carmen Sánchez-García, David Badía-Villas, Rob Bryant, Matthew B. Dickinson, Jorge Mataix-Solera, Jessica R Miesel, Pete R. Robichaud, Cristina SantínKeywordsSourceInternational Journal of Wildland FireYear2025
- The genus Armillaria is a broad group of basidiomycete (Agaricales, Physalacriaceae) plant pathogens that can have detrimental effects on woody hosts in forested, urban, and horticultural landscapes. Several species are known as aggressive root pathogens on both conifers and deciduous woody plants. Armillaria species are considered white rot fungi due to their capacity to degrade both lignin and cellulose in woody tissues. Armillaria mexicana was recently described as a new species found in peach (Prunus persica) orchards of Coatepec Harinas, State of Mexico. However, a subsequent study...AuthorsJane E Stewart, Mee-Sook Kim, Jorge R Ibarra Caballero, Patrick I. Bennett, John W. Hanna, Rubén D Elías-Román, Ned B. KlopfensteinKeywordsSourceGenome Biology and EvolutionYear2025
- The critical role of forest carbon modeling in climate change mitigation and adaptation has brought it to the forefront of natural climate solutions (NCS) discussions. To facilitate scientific inquiry related to forest carbon and its climate change mitigation potential, we synthesize current challenges and recommend strategic advancements for quantifying and projecting forest carbon dynamics. A national collaborative effort, engaging stakeholders from academia, industry, and policy sectors, has identified key six areas for scientific development, including tree growth, mortality, and...AuthorsHolly L. Munro, Christopher W. W. Woodall, William R. L. Anderegg, Colin M. Beier, Bronson P. Bullock, Kendall DeLyser, David D. Diaz, Bianca N.I. Eskelson, Margaret E. K. Evans, Jeff W. Atkins, John D. Foppert, Bryan C. Foster, Thomas R. Fox, Jereme M. Frank, Robert E. Froese, George C. Gaines, Peter Gould, Temesgen Hailemariam, Edie Sonne Hall, Katherine A. Heckman, Eileen Helmer, J. Aaron Hogan, Coeli Hoover, Stephen M. Kinane, David W. MacFarlane, Lara T. Murray, Gregory Paradis, Krishna P. Poudel, Stephen P. Prisley, James L. Rakestraw, Hector Restrepo, Ajay Sharma, John D. Shaw, Erin Smith-Mateja, Curtis L. VanderSchaaf, Can Vatandaslar, Aaron R. Weiskittel, Sheng-I. YangKeywordsSourceJournal of ForestryYear2025
- Although Armillaria solidipes was described in 1900, confusion has surrounded the appropriate use of this taxonomic epithet, largely because DNA sequence–based characterization and an associated culture were unavailable for the original holotype. An epitype for A. solidipes (previously known as North American Biological Species I) is established herein, along with morphological descriptions and genetic characterization that clearly distinguish A. solidipes, which is found in North America, from A. ostoyae (previously known as European Biological Species C), which is found in Eurasia. Of...AuthorsVladimír Antonín, Ada J. Fitz Axen, Jorge R. Ibarra Caballero, James J. Worrall, Suzanne B. Marchetti, Jane E. Stewart, Ned B. Klopfenstein, Mee-Sook KimKeywordsSourceMycologiaYear2025