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- NASA’s Global Ecosystem Dynamics Investigation (GEDI) is collecting spaceborne full waveform lidar data with a primary science goal of producing accurate estimates of forest aboveground biomass density (AGBD). This paper presents the development of the models used to create GEDI’s footprint-level (~25 m) AGBD (GEDI04_A) product, including a description of the datasets used and the procedure for final model selection. The data used to fit our models are from a compilation of globally distributed spatially and temporally coincident field and airborne lidar datasets, whereby we simulated...AuthorsLaura Duncanson, James R. Kellner, John Armston, Ralph Dubayah, David M. Minor, Steven Hancock, Sean P. Healey, Paul L. Patterson, Svetlana Saarela, Suzanne Marselis, Carlos E. Silva, Jamis Bruening, Scott J. Goetz, Hao Tang, Michelle Hofton, Bryan Blair, Scott Luthcke, Lola Fatoyinbo, Katharine Abernethy, Alfonso Alonso, Hans-Erik Andersen, Paul Aplin, Timothy R. Baker, Nicolas Barbier, Jean Francois Bastin, Peter Biber, Pascal Boeckx, Jan Bogaert, Luigi Boschetti, Peter Brehm Boucher, Doreen S. Boyd, David F. R. P. Burslem, Sofia Calvo-Rodriguez, Jerome Chave, Robin L. Chazdon, David B. Clark, Deborah A. Clark, Warren B. Cohen, David A. Coomes, Piermaria Corona, K. C. Cushman, Mark E. J. Cutler, James W. Dalling, Michele Dalponte, Jonathan Dash, Sergio de-Miguel, Songqiu Deng, Peter Woods Ellis, Barend Erasmus, Patrick A. Fekety, Alfredo Fernandez-Landa, Antonio Ferraz, Rico Fischer, Adrian G. Fisher, Antonio Garcia-Abril, Terje Gobakken, Jorg M. Hacker, Marco Heurich, Ross A. Hill, Chris Hopkinson, Huabing Huang, Stephen P. Hubbell, Andrew T. HudakSourceRemote Sensing of Environment. 270: 112845.Year2022
- Armillaria root disease causes tree stress and mortality worldwide, including in conifer forests of western North America. Armillaria-induced tree mortality is slower than other disturbances, such as fire, but persistent over time, and therefore difficult to detect across large areas. Hence methods to detect Armillaria-affected trees and identify infested stands are of great value to forest managers. We used high-density light detection and ranging (lidar), high-resolution aerial orthoimagery, and associated field observations to map individual tree health across an Armillaria-affected...AuthorsBrent W. Oblinger, Benjamin C. Bright, Ryan Hanavan, Mike Simpson, Andrew T. Hudak, Bruce D. Cook, Lawrence A. CorpKeywordsSourceForest Ecology and Management. 511: 120126.Year2022
- Soil erosion has been recognized as a significant environmental issue in the United States for over 200 years. Numerous attempts have been made to predict and quantify the phenomenon, yet significant issues remain that hinder the accuracy and effectiveness of such models. This article describes the application of the new generation Unit Stream Power Erosion and Deposition (USPED) model that estimates soil erosion and concomitant sediment deposition at Schofield Barracks, Hawai‘i, an active Army training installation. The model accurately placed modeled estimates of soil erosion and...AuthorsSteve D. Warren, Thomas L. RuzyckiSourcePacific Science. 76(1): 43-51.Year2022
- Public lands face growing demands to provide ecosystem services, while protecting species of conservation concern, like insect pollinators. Insect pollinators are critical for the maintenance of biodiversity and ecosystem function, but it is unclear how management of public lands influence pollinator conservation. We found 63 studies investigating the effects of prescribed burning, logging, grazing, invasive species removal, revegetation with wildflower mixes, and hosting commercial pollinators, on native insect pollinators on natural and semi-natural ecosystems in the US and summarized...AuthorsWill Glenny, Justin B. Runyon, Laura A. BurkleKeywordsSourceBiodiversity and Conservation. https://doi.org/10.1007/s10531-022-02399-5.Year2022
- Demasculinization, the reduction of male sexual characters due to parasitic nematode infection, is described in Nearctic Dolichopodidae. Five species are confirmed to be demasculinized (3 species of Dolichopus Latreille and 1 species each of Rhaphium Meigen and Tachytrechus Haliday) by nematodes in two families (apparent Mermithidae and Parasitylenchidae). The following nematode-infected males were inadvertently described as new species and are here proposed as synonyms: Dolichopus hurleyi Runyon, 2008 = D. dorycerus Loew, 1864, syn. nov.; Dolichopus frosti Runyon, 2008 = D. sincerus...AuthorsJustin B. RunyonKeywordsSourceZootaxa. 5092(5): 545-558.Year2022
- Spatial interactions between trees influence forest community succession. The objective of this study was to investigate how shifts in forest composition and proximity between tree species affect stand development over time in mixed forest systems. At six locations across the Fishlake National Forest, Utah, USA, in stands where facilitation has been documented previously, tree-ring samples were collected from aspen and subalpine fir trees. Basal area increment was calculated to characterize the effects of the proximity of overstory trees on multidecadal growth responses of aspen and...AuthorsRebecca Lee Molinari, Matthew F. Bekker, Benjamin D. St. Clair, Jason Bartholomew, R. Justin DeRose, Stanley G. Kitchen, Samuel B. St. ClairKeywordsSourceEcosphere. 13: e3957.Year2022
- We developed a new online interface for the Water Erosion Prediction Project (WEPP) model (WEPPcloud) with a framework that allows the incorporation and development of several other models and applications to make hydrologic models more accessible to land managers and facilitate the decision-making process. All inputs to WEPP, such as topography, soils, land use, and weather, are automatically created from publicly available online international databases and converted into input formats readable by the model. The WEPPcloud interface can be applied to forested, cropland, and rangeland...AuthorsRoger Lew, Mariana Dobre, Anurag Srivastava, Erin S. Brooks, William J. Elliot, Pete R. Robichaud, Dennis C. FlanaganKeywordsSourceJournal of Hydrology. 608: 127603.Year2022
- Water use in the United States reached its lowest level in 2015 in at least four decades. National trends, however, mask local challenges throughout the U.S. In some places, decreases in surface water use were more than offset by increases in groundwater use, leading to net increases in total withdrawals. Other places have seen increasing rates of water shortages caused by mixes of socioeconomic and climate forces. This study examines recent trends in freshwater use and makes projections in future freshwater use over the next 50 years. Projections are based on socioeconomic and climate...AuthorsTravis Warziniack, Mazdak Arabi, Thomas C. Brown, Pam M. Froemke, Rohini Ghosh, Shaunie Rasmussen, Ryan SwartzentruberSourceEarth’s Future. 10: e2021EF002222.Year2022
- Robust ecological forecasting of tree growth under future climate conditions is critical to anticipate future forest carbon storage and flux. Here, we apply three ingredients of ecological forecasting that are key to improving forecast skill: data fusion, confronting model predictions with new data, and partitioning forecast uncertainty. Specifically, we present the first fusion of tree-ring and forest inventory data within a Bayesian state-space model at a multi-site, regional scale, focusing on Pinus ponderosa var. brachyptera in the southwestern US. Leveraging the complementarity of...AuthorsKelly A. Heilman, Michael C. Dietze, Alexis A. Arizpe, Jacob Aragon, Andrew Gray, John D. Shaw, Andrew O. Finley, Stefan Klesse, R. Justin DeRose, Margaret E. K. EvansKeywordsSourceGlobal Change Biology. 28: 2442-2460.Year2022
- Numerous wildfire management agencies and institutions rely primarily on simple risk approaches to wildfire that focus on technical risk assessments that do not reflect the complexity of contemporary wildfire risk. This review paper argues that such insufficiently complex conceptualizations of risk, which do not account for the social and ecological diversity of fire-prone areas, are key contributors to the continued wildfire dilemma. We discuss distinctions between approaching wildfire as a simple and a complex risk and illuminate the need for expanded and complimentary ways to further...AuthorsMaureen Essen, Sarah M. McCaffrey, Jesse Abrams, Travis PaveglioKeywordsSourceJournal of Environmental Planning and Management. https://doi.org/10.1080/09640568.2021.2007861.Year2022