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Displaying 3,331 - 3,340 of 64,772 Publications- Rationale. Pine needles represent an important fuel source in coniferous forest systems in the western United States. During forest fires, they can be easily ignited and help sustain flame on the ground. Methodology. In this study, a comprehensive chemical analysis was conducted to examine oxygenated organic compounds (OOCs) present in PM2.5 (particles ≤ 2.5 μm in aerodynamic diameter) formed from burning dry and moist ponderosa pine (Pinus ponderosa) needles (PPN) in the presence and absence of fine woody debris (FWD). The effect of fuel moisture content (FMC), a key parameter that...AuthorsMohammed Jaoui, Shawn P. Urbanski, Russell W. Long, Matthew S. LandisKeywordsSourceEnvironmental Chemistry. 20(8): 319-338.Year2023
- In this study, we investigate how seasonal streamflow and soil moisture patterns have responded to variability in vegetation phenology in humid, temperate forested watersheds without significant seasonal snowmelt over the last four decades. We characterize spring streamflow peaks using 50th percentiles of cumulative daily precipitation, streamflow, and soil moisture measurements, and investigate interactions with remotely sensed, greenup anomalies. After removing a dominant precipitation control, 1-day earlier greenup is usually associated with about 1-day early spring flow peak at four...AuthorsTaehee Hwang, Lawrence E. Band, A. Christopher Oishi, Hojeong KangSourceWater Resources ResearchYear2023
- Wetlands cover a small portion of the world, but have disproportionate influence on global carbon (C) sequestration, carbon dioxide and methane emissions, and aquatic C fluxes. However, the underlying biogeochemical processes that affect wetland C pools and fluxes are complex and dynamic, making measurements of wetland C challenging. Over decades of research, many observational, experimental, and analytical approaches have been developed to understand and quantify pools and fluxes of wetland C. Sampling approaches range in their representation of wetland C from short to long timeframes and...AuthorsSheel Bansal, Irena F. Creed, Brian A. Tangen, Scott D. Bridgham, Ankur R. Desai, Ken W. Krauss, Scott C. Neubauer, Gregory B. Noe, Donald O. Rosenberry, Carl C. Trettin, Kimberly P. Wickland, Scott T. Allen, Ariane Arias-Ortiz, Anna R. Armitage, Dennis Baldocchi, Kakoli Banerjee, David Bastviken, Peter Berg, Matthew J. Bogard, Alex T. Chow, William H. Conner, Christopher Craft, Courtney Creamer, Tonya DelSontro, Jamie A. Duberstein, Meagan Eagle, M. Siobhan Fennessy, Sarah A. Finkelstein, Mathias Göckede, Sabine Grunwald, Meghan Halabisky, Ellen Herbert, Mohammad M. R. Jahangir, Olivia F. Johnson, Miriam C. Jones, Jeffrey J. Kelleway, Sara Knox, Kevin D. Kroeger, Kevin A. Kuehn, David Lobb, Amanda L. Loder, Shizhou Ma, Damien T. Maher, Gavin McNicol, Jacob Meier, Beth A. Middleton, Christopher Mills, Purbasha Mistry, Abhijit Mitra, Courtney Mobilian, Amanda M. Nahlik, Sue Newman, Jessica L. O’Connell, Patty Oikawa, Max Post van der Burg, Charles A. Schutte, Changchun Song, Camille L. Stagg, Jessica Turner, Rodrigo Vargas, Mark P. Waldrop, Marcus B. Wallin, Zhaohui Aleck Wang, Eric J. Ward, Debra A. Willard, Stephanie Yarwood, Xiaoyan ZhuKeywordsAccretion, Accumulation, Biomass, Bulk density, Carbon Cycling, Chambers, Core, Decomposition, Dissolved gas, Dissolved organic carbon, Eddy covariance, Greenhouse gas, Groundwater, Hydrology, Incubation, Lateral transport, Litter, Methane, Methods, Microbes, Models, Net primary productivity, Plants, Porewater, Radiometric dating, Remote sensing, Sediment, Soil organic carbon, Water, VegetationSourceWetlandsYear2023
- Blue carbon refers to carbon captured by marine and coastal ecosystems, such as mangroves, coastal wetlands, and seagrasses. Coastal ecosystems sequester carbon at a much faster rate than terrestrial ecosystems, and the carbon stored belowground can remain in place for decades to millennia if undisturbed by humans or extreme events. Conservation and restoration of coastal ecosystems can play a role in reducing carbon dioxide accumulations in the atmosphere by increasing sequestration of blue carbonAuthorsAllison R. Crimmins, Christine L. May, Sarah R. Cooley, Erica Fleishman, Eric E. Grossman, Brian Helmuth, Richard A. MacKenzie, Daisy R. Ramirez Lopez, Emily WasleySourceFifth National Climate AssessmentYear2023
- Hurricanes, increasingly powerful storms, and rising sea levels are already harming human health, ecosystems, water and food supplies, and critical infrastructure in the US Caribbean, with underserved communities suffering disproportionate impacts. Effective adaptation to support resilience in the region could be enhanced by decentralization, shared governance, and stronger partnerships across the Caribbean region and the US mainland.AuthorsPablo A Méndez-Lazaro, Patricia Chardón-Maldonado, Nora Alvarez-Berrios, Barreto Maritza, Jared H. Bowden, Wanda I. Crespo-Acevedo, Ernesto L. Diaz,, Lloyd S. Gardner,, Grizelle Gonzalez, Gregory Guannel, Zack Guido, Eric W. Harmsen, Amanda J. Leinberger, Kathleen McGinley, Ana P. Ortiz, Roger S. Pulwarty, LaVerne E. Ragster,, Isabel C Rivera-Collazo, Ruth Santiago, Carlos Santos-Burgoa, Ingrid M. Vila-BiaggiKeywordsSourceFifth National Climate AssessmentYear2023
- For nearly two decades, stream baiting of northern and central California coastal streams has been an important tool in the management of sudden oak death, a devastating forest disease caused by the oomycete Phytophthora ramorum. Phytophthoraspecies are baited with floating rhododendron leaves, serving as an early detection tool for the presence of P. ramorumin watersheds across more than 800 km of California coastline. While this long-standing management tool is focused on a single species of Phytophthora, other species of Phytophthorahave been baited alongside P. ramorum, and this study...AuthorsTyler B. Bourret, Heather K. Mehl, Kamyar Aram, David M. RizzoKeywordsSourceMycological Progress. 22(8): 858Year2023
- Rapid climate change and invasive species introductions threaten ecological communities across the globe. Freshwaters are particularly vulnerable and impacted, especially when these stresses coincide. We document the migration of an invasive piscine predator, the Sacramento pikeminnow (Ptychocheilus grandis), within its introduced range, the South Fork Eel River, California, USA. Snorkel surveys and temperature monitoring in 2015–2019 showed that pikeminnow migrate upstream during spring and early summer, with earlier migration in warmer years. We developed a statistical temperature model...AuthorsPhilip B. Georgakakos, David Dralle, Mary E. PowerKeywordsSourceEnvironmental Biology of Fishes. 106(11): 2069-2082.Year2023
- Managing multiple forest insect pests and diseases is challenging. For example, in eastern white pine (Pinus strobus) stands whereas partial shading and high seedling density is encouraged to reduce damage by white pine blister rust (Cronartium ribicola) and white pine weevil (Pissodes strobi), dense conditions in the understory may increase damage by foliar diseases such as brown spot needle blight (Lecanosticta acicola) and Caliciopsis canker (Caliciopsis pinea). We evaluated the effect of silvicultural treatments, shelterwoods (residual basal area < 18 m2 ha−1), low density thinnings...AuthorsIsabel Alvarez Munck, Mariko Yamasaki, Jon JanelleKeywordsSourceFrontiers in Forests and Global ChangeYear2023
- Purpose. Nutrient and sediment pollution of surface waters remains a critical challenge for improving water quality. This study takes a user-friendly field-scale tool and assesses its ability to model at both the field and watershed scale within the Fox River Watershed (FRW), Wisconsin, USA, along with assessing how targeted vegetation implementation could attenuate nutrient and sediment exports. Methods. To assess potential load reductions, the nutrient tracking tool (NTT) was used with a scoring system to identify areas where vegetation mitigation could be implemented within three...AuthorsEthan D. Pawlowski, Diana L. Karwan, Randy KolkaKeywordsSourceJournal of Soils and SedimentsYear2023
- Red spruce (Picea rubens Sarg.) was a prized timber species in West Virginia during the era of resource exploitation in the late 1800s and early 1900s. As a result, central Appalachian red spruce comprise a much smaller component of high-elevation stand composition and a greatly constricted presence across the region. Widespread restoration efforts are underway to re-establish red spruce across this landscape. However, without benchmarks to gauge growth rates and stand developmental patterns, it is unclear whether these efforts are successful. Our goal was to develop reference curves...AuthorsJoseph M. Gray, Jamie L. Schuler, Melissa Thomas-Van Gundy, Sophan ChhinKeywordsSourceForestsYear2023