Treesearch
Displaying 4,201 - 4,210 of 64,690 Publications- As society grapples with increasing wildfire damage to landscapes and communities, the capacity of the interagency system in the USA designed to protect landscapes and communities from wildfires is degrading. A stressed system will be less capable of protecting life, property, and resources, and increased workloads will likely increase hazards to fire personnel and amplify existing problems with recruitment and retention. We argue that solutions are attainable through increased attention to performance and through more anticipatory, adaptive, and intelligent deployment of fire personnel...AuthorsMatthew P. Thompson, Erin J. Belval, Jude Bayham, Dave E. Calkin, Crystal S. Stonesifer, David FloresKeywordsSourceJournal of Forestry. 2023: 121-124.Year2023
- Outbreaks of several bark beetle species can develop rapidly in response to drought and may result in large transfers of carbon (C) stored in live trees to C stored in dead trees (10s of Tg C yr-1in the western U.S. alone), which over time will be released back to the atmosphere. The western pine beetle (WPB) outbreak incited by the 2012–2015 mega-drought in the Sierra Nevada, California, U.S., could portend more frequent and/or severe bark beetle outbreaks as the temperature warms and drought frequency and intensity increase in the future. However, changes in the frequency and/or severity...AuthorsZachary J. Robbins, Chonggang Xu, Alex Jonko, Rutuja Chitra-Tarak, Christopher J. Fettig, Jennifer Costanza, Leif Mortenson, Brian H. Aukema, Lara M. Kueppers, Robert M. SchellerKeywordsSourceFrontiers in Environmental Science. 11: 772.Year2023
- AuthorsQinfeng Guo, Kevin M. Potter, Hai Ren, Peixia ZhangKeywordsSourceForestsYear2023
- Uncertainties about controls on tree mortality make forest responses to land-use and climate change difficult to predict. We tracked biomass of tree functional groups in tropical forest inventories across Puerto Rico and the U.S. Virgin Islands, and with random forests we ranked 86 potential predictors of small tree survival (young or mature stems 2.5–12.6 cm diameter at breast height). Forests span dry to cloud forests, range in age, geology and past land use and experienced severe drought and storms. When excluding species as a predictor, top predictors are tree crown ratio and height,...AuthorsEileen Helmer, Shannon Kay, Humfredo Marcano-Vega, Jennifer S. Powers, Tana E. Wood, Xiaolin Zhu, David Gwenzi, Thomas S. RuzyckiSourcePLOS ONEYear2023
- Ecological disturbance regimes across the globe are being altered via direct and indirect human influences. Biodiversity loss at multiple scales can be a direct outcome of these shifts. Fire, especially in dry forests, is an ecological disturbance that is experiencing dramatic changes due to climate change, fire suppression, increased human population in fire-prone areas, and alterations to vegetation composition and structure. Dry western conifer forests that historically experienced frequent, low-severity fires are now increasingly burning at high severity. Relatively little work has...AuthorsJonahMaria Weeks, Jesse E. D. Miller, Zachary Steel, Evan E. Batzer, Hugh D. SaffordKeywordsSourceEcosphere. 14( 2): e4409.Year2023
- Although fire is a fundamental ecological process in western North American forests, climate warming and accumulating forest fuels due to fire suppression have led to wildfires that burn at high severity across larger fractions of their footprint than were historically typical. These trends have spiked upwards in recent years and are particularly pronounced in the Sierra Nevada-Southern Cascades ecoregion of California, USA, and neighboring states. We assessed annual area burned (AAB) and percentage of area burned at high and low-to-moderate severity for seven major forest types in this...AuthorsJ. N. Williams, H. D. Safford, N. Enstice, Zachary Steel, A. K. PaulsonKeywordsSourceEcosphere. 14( 1): e4397.Year2023
- Assessing nutrient critical load exceedances requires complete and accurate atmospheric deposition budgets for reactive nitrogen (Nr). The exceedance is the total amount of Nr deposited to the ecosystem in excess of the critical load, which is the amount of Nr input below which harmful effects do not occur. Total deposition includes all forms of Nr (i.e., organic and inorganic) deposited to the ecosystem by wet and dry pathways. Here we present results from the Southern Appalachian Nitrogen Deposition Study (SANDS), in which a combination of measurements and field-scale modeling was used...AuthorsJohn T. Walker, Xi Chen, Zhiyong Wu, Donna Schwede, Ryan Daly, Aleksandra Djurkovic, A. Christopher Oishi, Eric Edgerton, Jesse Bash, Jennifer D. Knoepp, Melissa Puchalski, John Iiames, Chelcy F. MiniatKeywordsSourceBiogeosciences. 20: 971-995.Year2023
- Maintenance of connectivity is a commonly recommended strategy for species management and conservation as habitat loss and fragmentation continues. Therefore, functional connectivity modeling is needed for species over large geographic areas. However, sex-specific functional connectivity is rarely considered, even though the results of such an analysis have the potential to influence applied management practices.AuthorsKatherine Zeller, Claudia Wultsch, Lindsay S. Welfelt, Richard A. Beausoleil, Erin L. LandguthSourceLandscape Ecology. 38: 223-237.Year2023
- This study expands the spatial scope of the Subregional Timber Supply (SRTS) model to include states in the central hardwood region and examine critical market tipping points of high-grade (large diameter) white oak under a set of illustrative scheduled demand scenarios. In light of the growing concern for future white oak timber supply, we illustrate the sensitivity of future inventory tipping points to market structure and price responsiveness. Particularly, we examined the importance of market demand parameters, including growth rates for product demand and supply/demand elasticities,...AuthorsGaurav Dhungel, David Rossi, Jesse Henderson, Robert Abt, Ray Sheffield, Justin BakerSourceJournal of ForestryYear2023
- Increasing fire severity and warmer, drier postfire conditions are making forests in the western United States (West) vulnerable to ecological transformation. Yet, the relative importance of and interactions between these drivers of forest change remain unresolved, particularly over upcoming decades. Here, we assess how the interactive impacts of changing climate and wildfire activity influenced conifer regeneration after 334 wildfires, using a dataset of postfire conifer regeneration from 10,230 field plots. Our findings highlight declining regeneration capacity across the West over the...AuthorsLisa A. McCauley, Nicholas Povak, Kristen L. Shive, Edward Smith, Jens Stevens, Camille S. Stevens-Rumann, lan H. Taylor, Alan J. Tepley, Derek J. N. Young, Robert A. Andrus, Mike A. Battaglia, Julia K. Berkey, Sebastian Busby, Amanda R. Carlson, Marin E. Chambers, Erich Dodson, Daniel C. Donato, William M. Downing, Paula J. Fornwalt, Joshua S. Halofsky, Ashley Hoffman, Andres Holz, Jose Iniguez, Meg A. Krawchuk, Mark R. Kreider, Andrew J. Larson, Garrett W. Meigs, John Paul Roccaforte, Monica T. Rother, Hugh Safford, Michael Schaedel, Jason S. Sibold, Megan P. Singleton, Monica G. Turner, Alexandra K. Urza, Kyra D. Clark-Wolf, Larissa Yocom, Joseph B. Fontaine, John L. Campbell, Kimberley T. Davis, Marcos D. Robles, Kerry B. Kemp, Philip E. Higuera, Teresa Chapman, Kerry L. Metlen, Jamie L. Peeler, Kyle C. Rodman, Travis Woolley, Robert N. Addington, Brian J. Buma, C. Alina Cansler, Michael J. Case, Brandon M. Collins, Jonathan D. Coop, Solomon Z. Dobrowski, Nathan S. Gill, Collin Haffey, Lucas B. Harris, Brian J. Harvey, Ryan D. Haugo, Matthew D. Hurteau, Dominik Kulakowski, Caitlin E. LittlefieldKeywordsSourcePNAS. 120(11): e2208120120.Year2023