Treesearch
Displaying 21 - 30 of 62,077 Publications- Background and Aims - Hotter drought- and biotically driven tree mortality are expected to increase with climate change in much of the western USA, and species persistence will depend upon ongoing establishment in novel conditions or migration to track ecological niche requirements. High-elevation tree species might be particularly vulnerable to increasing water stress as snowpack declines, increasing the potential for adult mortality and simultaneous regeneration failures. Seedling survival will be determined by ecophysiological limitations in response to changing water availability and tempe...AuthorsLacey E. Hankin, Felipe H. Barrios-Masias, Alexandra K. Urza, Sarah M. BisbingKeywordsSourceAnnals of Botany. https://doi.org/10.1093/aob/mcae064.Year2024
- Nutrient limitation is widespread in terrestrial ecosystems. Accordingly, representations of nitrogen (N) limitation in land models typically dampen rates of terrestrial carbon (C) accrual, compared with C-only simulations. These previous findings, however, rely on soil biogeochemical models that implicitly represent microbial activity and physiology. Here we present results from a biogeochemical model testbed that allows us to investigate how an explicit versus implicit representation of soil microbial activity, as represented in the MIcrobial-MIneral Carbon Stabilization (MIMICS) and Carnegi...AuthorsWilliam R. Wieder, Melannie D. Hartman, Emily Kyker‐Snowman, Brooke Eastman, Katerina Georgiou, Derek Pierson, Katherine S. Rocci, A. Stuart. GrandyKeywordsSourceJournal of Advances in Modeling Earth Systems. 16: e2023MS004156.Year2024
- The US National Fire Danger Rating System (USNFDRS) supports wildfire management decisions nationwide, but it has not been updated since 1988. Here we implement new fuel moisture models, and we simplify the fuel models while maintaining the overall USNFDRS structure. Modeled and measured live fuel moisture content values were highly correlated (𝑟2 = 0.629 with defaults and 𝑟2 = 0.693 when species and location optimized). We also consolidated fuel models to five fuel types that eliminated significant index cross-correlation. Index seasonality compared between old (V2) and new USNFDRS models (v4...AuthorsW. Matt Jolly, Patrick H. Freeborn, Larry S. Bradshaw, Jon Wallace, Stuart BrittainKeywordsSourceEnvironmental Modelling and Software. 181: 106181.Year2024
- This scientific commentary refers to `Stem heating results in hydraulic dysfunction in Symplocos tinctoria: implications for post-fire tree death' by Hoffmann et al. (https://doi.org/10.1093/treephys/tpae023).How does fire kill trees? This is a fundamental question to which we surprisingly do not have the answer. The capacity to predict when and where trees will die due to fire is important for addressing a range of applied research problems, such as modelling fire effects on vegetation and dependent fauna, carbon emissions and modelling future fire regimes. As fire regimes continue to change ...AuthorsRachael H. Nolan, Charlotte C. Reed, Sharon M. HoodSourceTree Physiology. 44(7): tpae073.Year2024
- Long-term field studies are the gold standard for learning and proof-of- concept in applied forest ecology. In the northern Rocky Mountains, USA, researchers have showcased the enduring effects of fire hazard reduction and restoration treatments at the Lubrecht Fire and Fire Surrogate study. This study demonstrates the extra benefit of reduced severity to insect outbreak following mechanical treatments. Combined mechanical and fire treatments prove to have long-lasting restoration effects, including regenerating desirable tree species. Thanks to the simple design and clear results, this study ...AuthorsJustin S. Crotteau, Sharon M. HoodKeywordsSourceBulletin of the Ecological Society of America. 105(3): e02148.Year2024
- Remotely sensed data are frequently used for predicting and mapping ecosystem characteristics, and spatially explicit wall-to-wall information is sometimes proposed as the best possible source of information for decision-making. However, wall-to-wall information typically relies on model-based prediction, and several features of model-based prediction should be understood before extensively relying on this type of information. One such feature is that model-based predictors can be considered both unbiased and biased at the same time, which has important implications in several areas of applica...AuthorsGoran Stahl, Terje Gobakken, Svetlana Saarela, Henrik J. Persson, Magnus Ekstrom, Sean P. Healey, Zhiqiang Yang, Johan Holmgren, Eva Lindberg, Kenneth Nystroma, Emanuele Papucci, Patrik Ulvdal, Hans Ole Orka, Erik Naesset, Zhengyang Hou, Hakan Olsson, Ronald E. McRobertsKeywordsSourceForest Ecosystems. 11: 100164.Year2024
- Global changes in climate and land use are threatening natural ecosystems, biodiversity, and the ecosystem services people rely on. This is why it is necessary to track and monitor spatiotemporal change at a level of detail that can inform science, management, and policy development. The current constellation of multiple Landsat and Sentinel-2 satellites collecting imagery at predominantly ≤30-m spatial resolution affords an opportunity for the generation of global medium- resolution products every few days. Our goal is to both identify the information needs and provide direction towards the g...AuthorsVolker C. Radeloff, David P. Roy, Michael A. Wulder, Martha Anderson, Bruce Cook, Christopher J. Crawford, Mark Friedl, Feng Gao, Noel Gorelick, Matthew Hansen, Sean Healey, Patrick Hostert, Glynn Hulley, Justin L. Huntington, David M. Johnson, Chris Neigh, Alexei Lyapustin, Leo Lymburner, Nima Pahlevan, Jean-Francois Pekel, Theodore A. Scambos, Crystal Schaaf, Peter Strobl, Curtis E. Woodcock, Hankui K. Zhang, Zhe ZhuKeywordsSourceRemote Sensing of Environment. 300: 113918.Year2024
- The recovery of biomass in secondary forests plays a vital role in global carbon sequestration processes and carbon emission mitigation. However, accurately quantifying the accumulation rate of aboveground biomass density in these forests is challenging owing to limited longitudinal field data. An alternative monitoring strategy is characterizing the mean biomass at a single point in time across stands with a range of known ages. This chronosequence approach can also be used with remotely sensed data by combining biomass measured with platforms such as NASA’s Global Ecosystem Dynamics Investig...AuthorsNidhi Jha, Sean P. Healey, Zhiqiang Yang, Goran Stahl, Matthew G. BettsKeywordsSourceEnvironmental Research Letters. 19(4): 044062.Year2024
- Two major recent policy developments aim to eliminate or reduce forest degradation. The European Union’s Deforestation Regulation1 (EUDR) aims to prevent forest degradation through import bans on forest products that originate from degraded forests. The core goal of the EUDR is to reduce carbon emissions and biodiversity loss1. An objective of the 2023 COP28 United Nations Climate Change Conference, signed by 100 countries, is “halting and reversing” deforestation and forest degradation by 2030. These policies bring into sharp relief a need for clear definition of the term ‘forest degradation’...AuthorsMatthew G. Betts, Zhiqiang Yang, Adam S. Hadley, Jessica Hightower, Fangyuan Hua, David Lindenmayer, Eugene Seo, Sean P. HealeySourceNature Ecology and Evolution. 8: 1054-1057.Year2024
- Panelists discussed the development and use of a research strategy to cultivate communities of practice for the mitigation of risks associated with the catastrophic effects of wildfires on communities. Two primary goals of the authors were to: (a) contribute theoretically to the understanding and application of communities of practice, specifically around risk management and (b) contribute to understanding in the form of lessons learned from the United States Forest Service.AuthorsDavid Flores, Rebekah L. Fox, Jody Jahn, Joel O. Iverson, Steven J. VenetteKeywordsSourceIn: Proceedings of the International Crisis and Risk Communication Conference, Volume 6; March 11-13, 2024; Orlando, FL. Orlando, FL: International Crisis and Risk Communication Association. p. 66-69.Year2024