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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Rising sea level reduces carbon sequestration and CO2 and N2O fluxes while promoting CH4 flux from mangroves Rising sea level reduces carbon sequestration and CO2 and N2O fluxes while promoting CH4 flux from mangroves
Sea-level rise (SLR) may reduce mangrove carbon sequestration by increasing greenhouse gas (GHG) emissions—a key factor in forecasting the trajectory of blue carbon reserves. Nonetheless, predictions of future GHG fluxes under SLR remain uncertain. Unlike prior studies limited to controlled or single-site settings, we deploy cross-latitude “marsh-organ” designs in China to access GHG...
Authors
Peiyang Qiao, Luzhen Chen, Ken W. Krauss, Xudong Guo, Lian Xu, Xiaoxuan Gu, Ying Dong
Validation of gridded precipitation datasets for flood-typing in select conterminous U.S. basins Validation of gridded precipitation datasets for flood-typing in select conterminous U.S. basins
Gridded precipitation datasets are required for flood-typing historical annual peak streamflow events in basins across the Conterminous United States. Selected gridded precipitation datasets were validated over the period 1981–2013 through comparisons with gage data from the NOAA Global Historical Climatology Network daily (GHCNd). The ability of each gridded dataset to capture the...
Authors
Michelle M. Irizarry-Ortiz, Sarah Yvette Murphy
Quantifying landscape-level biodiversity change in an island ecosystem: A 50-year assessment of shifts in the Hawaiian avian community Quantifying landscape-level biodiversity change in an island ecosystem: A 50-year assessment of shifts in the Hawaiian avian community
Hawaii has experienced profound declines in native avifauna alongside the introduction of numerous bird species. While site-specific population studies are common, landscape-level analyses of avian population dynamics are rare, particularly in island ecosystems. To address this gap, we used a density surface model to create a spatio-temporal projection of population densities and...
Authors
Trevor Bak, Lucas Berio Fortini, Noah Hunt, Paul C. Banko, Lena Schnell, Richard J. Camp
A global database of soil microbial phospholipid fatty acids and enzyme activities A global database of soil microbial phospholipid fatty acids and enzyme activities
Soil microbes drive ecosystem function and play a critical role in how ecosystems respond to global change. Research surrounding soil microbial communities has rapidly increased in recent decades, and substantial data relating to phospholipid fatty acids (PLFAs) and potential enzyme activity have been collected and analysed. However, studies have mostly been restricted to local and...
Authors
Laura G. van Galen, Gabriel Reuben Smith, Andrew J. Margenot, Mark P. Waldrop, Thomas W. Crowther, Kabir G. Peay, Robert B. Jackson, Kailiang Yu, Anna Abrahão, Talaat A. Ahmed, Sten Anslan, Mark A. Anthony, Ademir Sergio Ferreira Araujo, Judith Ascher-Jenull, Elizabeth M. Bach, Mohammad Bahram, Christopher C.M. Baker, Petr Baldrian, Richard D. Bardgett, M. Noelia Barrios-Garcia, Felipe Bastida, Francesca Beggi, Liane G. Benning, Luca Bragazza, Arth A.D. Broadbent, Concha Cano-Díaz, Anna M. Cates, Carlos E.P. Cerri, Simone Cesarz, Baodong Chen, Amy T. Classen, Mathilde Borg Dahl, Manuel Delgado-Baquerizo, Nico Eisenhauer, Svetlana Evgrafova, Nicolas Fanin, Flavio Fornasier, Romeu Francisco, Andre L.C. Franco, Serita D. Frey, Hannu Fritze, Carlos García, Pablo García-Palacios, Maria Gómez-Brandón, Marina Gonzalez-Polo, Beatriz Gozalo, Robert Griffiths, Carlos Guerra, Moritz Hallama, Inga Hiiesalu, Hossain, Yajun Hu, Heribert Insam, Vincent E.J. Jassey, Lili Jiang, Ellen Kandeler, Petr Kohout, Urmas Kõljalg, Valentyna Krashevska, Xiaofei Li, Jing-Zhong Lu, Xiankai Lu, Shan Luo, Stefanie Lutz, Kathleen Allison Mackie-Haas, Fernanado T. Maestre, Minna Malmivaara-Lämsä, Kai Mangelsdorf, Maria Manjarrez, Sven Marhan, Ashley Martin, Kelly E. Mason, Jordan Mayor, Rebecca L. McCulley, Mari Moora, Paula V. Morais, Miriam Muñoz-Rojas, Rajasekaran Murugan, Andrew T. Nottingham, Victoria Ochoa, Raul Ochoa-Hueso, Jane Oja, Pål Axel Olsson, Maarja Öpik, Nick Ostle, Krista Peltoniemi, Taina Pennanen, David S. Pescador, G. Kenny Png, Christian Poll, Sergei Põlme, Anton M. Potapov, Anders Priemé, William Pritchard, Jeremy Puissant, Sandra Mara Barbosa Rocha, Christoph Rosinger, Liliane Ruess, Emma J. Sayer, Stefan Scheu, Robert L. Sinsabaugh, Lindsey C. Slaughter, Nadejda A. Soudzilovskaia, Jose Paulo Sousa, Lee Stanish, Shu-ichi Sugiyama, Leho Tedersoo, Pankaj Trivedi, Tanel Vahter, Jana Voriskova, Dirk Wagner, Cong Wang, David A. Wardle, Jeanette Whitaker, Yuanhe Yang, Zhiwei Zhong, Kai Zhu, Lori A. Ziolkowski, Martin Zobel, Johan van den Hoogen
Unveiling coseismic deformation from differenced legacy aerial photography and modern lidar topography: The 1983 M6.9 Borah Peak earthquake, Idaho, USA Unveiling coseismic deformation from differenced legacy aerial photography and modern lidar topography: The 1983 M6.9 Borah Peak earthquake, Idaho, USA
The 1983 M6.9 Borah Peak, Idaho, earthquake is one of the largest historical normal fault earthquakes in the western United States. We quantified meter-scale vertical change along the 35 km-long rupture using topographic differencing of 1966 aerial imagery and 2019 lidar-derived data. The initial differencing results are largely obscured by horizontal and vertical georeferencing errors...
Authors
Chelsea P Scott, Nadine G. Reitman, Simone Bello
Fiber-imaged supershear dynamics in the 2024 Mw 7 Mendocino Fault earthquake Fiber-imaged supershear dynamics in the 2024 Mw 7 Mendocino Fault earthquake
Fault structure and rupture physics are deeply intertwined, and observations of this coupling are critical for understanding earthquake behavior. Rupture propagation is observable at fine scales using dense seismic networks. Fiber-optic sensing allows for long-term deployments of ultradense arrays that enable high-resolution measurements of infrequent, large earthquakes. We recorded the...
Authors
James William Atterholt, Jeffrey J. McGuire, Andrew J. Barbour, Connie Stewart, Morgan P. Moschetti
Gas emissions from the Sulphur Bank Mercury Mine hydrothermal system, Clear Lake volcanic field, California Gas emissions from the Sulphur Bank Mercury Mine hydrothermal system, Clear Lake volcanic field, California
The Sulphur Bank Mercury Mine (SBMM) hydrothermal system offers insights into active degassing processes in the Clear Lake volcanic field (CLVF), a high-threat region based on its record of Holocene eruptions and proximity to populated areas. Here we present chemical and isotopic analyses of gas samples collected between 2015 and 2023, along with the first comprehensive CO2 flux survey...
Authors
Jennifer L. Lewicki, Sara Peek, Laura E. Clor, Andrew G. Hunt
Future forest conditions under alternative management and hydrological scenarios in the Upper Mississippi River floodplain Future forest conditions under alternative management and hydrological scenarios in the Upper Mississippi River floodplain
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Authors
Matthew L. Trumper, Nathan R. De Jager, Molly Van Appledorn, Andrew R. Meier
Examining the compositional selectivity of hydrocarbon oxidation products using liquid–liquid extraction and solid-phase extraction techniques Examining the compositional selectivity of hydrocarbon oxidation products using liquid–liquid extraction and solid-phase extraction techniques
The effect of extraction methods on detecting hydrocarbon oxidation products (HOPs) in groundwater remains unclear. HOPs are polar, water-soluble byproducts of petroleum biodegradation. Our previous work showed that liquid–liquid extraction (LLE), a method commonly used in regulatory monitoring, has a significantly lower extraction efficiency for HOPs compared to solid-phase extraction...
Authors
Phoebe Zito, Rana Ghannam, Maxwell L. Harsha, Barbara Bekins, David C. Podgorski
Quantifying groundwater response and uncertainty in beaver-influenced mountainous floodplains using machine learning-based model calibration Quantifying groundwater response and uncertainty in beaver-influenced mountainous floodplains using machine learning-based model calibration
Beavers (Castor canadensis) alter river corridor hydrology by creating ponds and inundating floodplains, and thereby improving surface water storage. However, the impact of inundation on groundwater, particularly in mountainous alluvial floodplains with permeable gravel/cobble layers overlain by a soil layer, remains uncertain. Numerical modeling across various floodplain structures...
Authors
Lijing Wang, Tristan Babey, Zach Perzan, Samuel Pierce, Martin A. Briggs, Kristin Boye, Kate Maher
Quantifying the relative importance of survival threats to a long-lived reptile using expert elicitation Quantifying the relative importance of survival threats to a long-lived reptile using expert elicitation
Long-term survival of a conservation-reliant species requires understanding the impact of threats on population growth rate and the management actions that can help mitigate these threats. We used a threat assessment with expert-elicited estimates to determine the relative effect of each stage-specific threat on the population growth rate of the wood turtle Glyptemys insculpta. In...
Authors
Jennifer F. Moore, J. Hardin Waddle, Fred Johnson, Julien Martin, Evan H. Campbell Grant, Jillian E. Fleming, Thomas S. Akre, Donald J. Brown, Yu Man Lee, Jonathon Drescher-Lehman, John Kleopfer, Jessica R. Meck, Kevin J. Oxenrider, Jeff Tamplin, Anthony Tur, Lisabeth L. Willey
Identifying organic contaminants at trespass cannabis grows on federal land in California, USA Identifying organic contaminants at trespass cannabis grows on federal land in California, USA
Despite the legalization of recreational cannabis in California, USA, illegal cannabis cultivation remains pervasive, partly through the establishment of illegal cultivation on public lands (trespass grows). These operations often illegally divert water for irrigation and perform unauthorized applications of chemical fertilizers and pesticides. This work investigates a broad suite of...
Authors
Gabrielle Pecora Black, Matt De Parsia, Matthew Uychutin, Mourad W. Gabriel, Ivan Medel, Greta Wengert, Clayton D. Raines, Dana W. Kolpin, Laura E. Hubbard, Michelle L. Hladik