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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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Microbial diversity, genomics, and phage–host interactions of cyanobacterial harmful algal blooms Microbial diversity, genomics, and phage–host interactions of cyanobacterial harmful algal blooms
The occurrence of cyanobacterial harmful algal blooms (cyanoHABs) is related to their physical and chemical environment. However, less is known about their associated microbial interactions and processes. In this study, cyanoHABs were analyzed as a microbial ecosystem, using 1 year of 16S rRNA sequencing and 70 metagenomes collected during the bloom season from Lake Okeechobee (Florida...
Authors
Lauren E. Krausfeldt, Elizaveta Shmakova, Hyo Won Lee, Viviana Mazzei, Keith A. Loftin, Robert P Smith, Emily E. Karwacki, Eric Fortman, B.H. Rosen, Hidetoshi Urakawa, Manoj Dadlani, Rita Colwell, Jose V. Lopez
Egg mercury concentration and egg size varies with position in the laying sequence in two songbird species Egg mercury concentration and egg size varies with position in the laying sequence in two songbird species
In birds, mercury embryotoxicity can occur through the transfer of mercury from the female to her eggs. Maternal transfer of mercury can vary by egg position in the laying sequence, with first-laid eggs often exhibiting greater mercury concentrations than subsequently laid eggs. We studied egg mercury concentration, mercury burden (total amount of mercury in the egg), and egg...
Authors
C. Alex Hartman, Joshua T. Ackerman, Breanne Cooney, Mark P. Herzog
Climate change scenarios for air and water temperatures in the upper San Francisco Estuary: Implications for thermal regimes and Delta Smelt Climate change scenarios for air and water temperatures in the upper San Francisco Estuary: Implications for thermal regimes and Delta Smelt
Climate projections and their effects in the San Francisco Estuary have been evaluated as part of the US Geological Survey’s CASCaDE2 project. Understanding the ecological effects of climate change can help manage and maintain the ecological health and productivity of the San Francisco Estuary. In this study, we assessed downscaled air temperature data from 10 global climate models (GCMs...
Authors
Brock Huntsman, Larry R. Brown, Marissa L. Wulff, Noah Knowles, R. Wayne Wagner, Frederick V. Feyrer
A circumpolar study unveils a positive non-linear effect of temperature on arctic arthropod availability that may reduce the risk of warming-induced trophic mismatch for breeding shorebirds A circumpolar study unveils a positive non-linear effect of temperature on arctic arthropod availability that may reduce the risk of warming-induced trophic mismatch for breeding shorebirds
Seasonally abundant arthropods are a crucial food source for many migratory birds that breed in the Arctic. In cold environments, the growth and emergence of arthropods are particularly tied to temperature. Thus, the phenology of arthropods is anticipated to undergo a rapid change in response to a warming climate, potentially leading to a trophic mismatch between migratory insectivorous...
Authors
Aurelie Chagnon-Lafortune, Eliane Duchesne, Pierre Legagneux, Laura McKinnon, Jeroen Reneerkens, Nicolas Casajus, Kenneth F. Abraham, Elise Bolduc, Glen S. Brown, Stephen C. Brown, H. River Gates, Olivier Gilg, Marie-Andrée Giroux, Kirsty Gurney, Steve Kendall, Eunbi Kwon, Richard B. Lanctot, David B. Lank, Nicolas Lecomte, Maria Leung, Joe Liebezeit, R.I.G. Morrison, Erica Nol, David C. Payer, Donald Reid, Daniel R. Ruthrauff, Sarah T. Saalfeld, Brett K. Sandercock, Paul Smith, Niels Martin Schmidt, Ingrid Tulp, David H. Ward, Toke Thomas Hoye, Dominique Berteaux, Joel Bety
Complex patterns of genetic population structure in the mouthbrooding marine catfish, Bagre marinus, in the Gulf of Mexico and U.S. Atlantic Complex patterns of genetic population structure in the mouthbrooding marine catfish, Bagre marinus, in the Gulf of Mexico and U.S. Atlantic
Patterns of genetic variation reflect interactions among microevolutionary forces that vary in strength with changing demography. Here, patterns of variation within and among samples of the mouthbrooding gafftopsail catfish (Bagre marinus, Family Ariidae) captured in the U.S. Atlantic and throughout the Gulf of Mexico were analyzed using genomics to generate neutral and non-neutral SNP...
Authors
David S. Portnoy, Shannon J. O’Leary, Andrew T. Fields, Christopher M. Hollenbeck, Dean Grubbs, Cheston T. Peterson, Jayne M. Gardiner, Douglas H. Adams, Brett J. Falterman, Marcus Drymon, Jeremy M. Higgs, Erin L. Pulster, Tonya R. Wiley, Steven A. Murawski
Time varying crustal anisotropy at Whakaari/White Island volcano Time varying crustal anisotropy at Whakaari/White Island volcano
Whakaari/White Island has been the most active New Zealand volcano in the 21st century, producing small phreatic and phreatomagmatic eruptions, which are hard to predict. The most recent eruption occurred in 2019, tragically claiming the lives of 22 individuals and causing numerous injuries. We employed shear-wave splitting analyses to investigate variations in anisotropy during...
Authors
D.M. Mengesha, M.K. Savage, A.D. Jolly, C.J. Ebinger
Comparing subduction ground-motion models to observations for Cascadia Comparing subduction ground-motion models to observations for Cascadia
We evaluate Cascadia subduction ground-motion models (GMMs), considered for the 2023 US National Seismic Hazard Model (NSHM) update, by comparing observations to model predictions. The observations comprise regional recordings from intraslab earthquakes, including contributions from 2021 and 2022 events in southern Cascadia and global records from interface earthquakes. Since the 2018...
Authors
James Andrew Smith, Morgan P. Moschetti, Eric M. Thompson
Taking heat (downstream): Simulating groundwater and thermal equilibrium controls on annual paired air–water temperature signal transport in headwater streams Taking heat (downstream): Simulating groundwater and thermal equilibrium controls on annual paired air–water temperature signal transport in headwater streams
Headwater stream temperature often exhibits spatial variation at the kilometer-scale, but the relative importance of the underlying hydrogeological processes and riverine perturbations remains poorly understood. In this study, we investigated the relative importance of groundwater (GW) and other processes on downstream annual stream temperature signal characteristics using deterministic...
Authors
Zachary Johnson, Martin A. Briggs, Craig D. Snyder, Brittany G. Johnson, Nathaniel P. Hitt
Rainfall intensification amplifies exposure of American Southwest to conditions that trigger postfire debris flows Rainfall intensification amplifies exposure of American Southwest to conditions that trigger postfire debris flows
Short-duration, high-intensity rainfall can initiate deadly and destructive debris flows after wildfire. Methods to estimate the conditions that can trigger debris flows exist and guidance to determine how often those thresholds will be exceeded under the present climate are available. However, the limited spatiotemporal resolution of climate models has hampered efforts to characterize...
Authors
Matthew A. Thomas, Allison C. Michaelis, Nina S. Oakley, Jason W. Kean, Victor A. Gensini, Walker S. Ashley
Systematic assessment of long-read RNA-seq methods for transcript identification and quantification Systematic assessment of long-read RNA-seq methods for transcript identification and quantification
The Long-read RNA-Seq Genome Annotation Assessment Project Consortium was formed to evaluate the effectiveness of long-read approaches for transcriptome analysis. Using different protocols and sequencing platforms, the consortium generated over 427 million long-read sequences from complementary DNA and direct RNA datasets, encompassing human, mouse and manatee species. Developers...
Authors
Francisco J. Pardo-Palacios, Dingjie Wang, Fairlie Reese, Mark Diekhans, Silvia Carbonell-Sala, Brian Williams, Jane E. Loveland, Maite De María, Matthew S. Adams, Gabriela Balderrama-Gutierrez, Amit K. Behera, Jose M. Gonzalez Martinez, Toby Hunt, Julien Lagarde, Cindy E. Liang, Haoran Li, Marcus Jerryd Meade, David A. Moraga Amador, Andrey D. Prjibelski, Inanc Birol, Hamed Bostan, Ashley M. Brooks, Muhammed Hasan Celik, Ying Chen, Mei R.M. Du, Colette Felton, Jonathan Goke, Saber Hafezqorani, Ralf Herwig, Hideya Kawaji, Joseph Lee, Jian-Liang Li, Matthias Lienhard, Alla Mikheenko, Dennis Mulligan, Ka Ming Nip, Mihaela Pertea, Matthew E. Ritchie, Andre D. Sim, Alison D. Tang, Yuk Kei Wan, Changqing Wang, Brandon Y. Wong, Chen Yang, If Barnes, Andrew E. Berry, Salvador Capella-Gutierrez, Alyssa Cousineau, Namrita Dhillon, Jose M. Fernandez-Gonzalez, Luis Ferrandez-Peral, Natàlia Garcia-Reyero, Stefan Gotz, Carles Hernandez-Ferrer, Liudmyla Kondratova, Tianyuan Liu, Alessandra Martinez-Martin, Carlos Menor, Jorge Mestre-Tomas, Jonathan M. Mudge, Nedka G. Panayotova, Alejandro Paniagua, Dmitry Repchevsky, Xingjie Ren, Eric Rouchka, Brandon Saint-John, Enrique Sapena, Leon Sheynkman, Melissa Laird Smith, Marie-Marthe Suner, Hazuki Takahashi, Ingrid A. Youngworth, Piero Carninci, Nancy D. Denslow, Roderic Guigo, Margaret Hunter, Rene Maehr, Yin Shen, Hagen U. Tilgner, Barbara J. Wold, Christopher Vollmers, Adam Frankish, Kin Fai Au, Gloria M. Sheynkman, Ali Mortazavi, Ana Conesa, Angela N. Brooks
Earthquake scenario development in conjunction with the 2023 USGS National Seismic Hazard Model Earthquake scenario development in conjunction with the 2023 USGS National Seismic Hazard Model
We present earthquake scenarios developed to accompany the release of the 2023 update to the US Geological Survey National Seismic Hazard Model (NSHM). Scenarios can serve a range of local and regional needs, from developing proactive-targeted mitigation strategies for minimizing impending risk to aiding emergency management planning. These deterministic scenarios can also be used to...
Authors
Robert Edward Chase, Kishor S. Jaiswal, Mark D. Petersen
Subducting plate structure and megathrust morphology from deep seismic imaging linked to earthquake rupture segmentation at Cascadia Subducting plate structure and megathrust morphology from deep seismic imaging linked to earthquake rupture segmentation at Cascadia
The origin of rupture segmentation along subduction zone megathrusts and linkages to the structural evolution of the subduction zone are poorly understood. Here, regional-scale seismic imaging of the Cascadia margin is used to characterize the megathrust spanning ~900 km from Vancouver Island to the California border, across the seismogenic zone to a few tens of kilometers from the coast...
Authors
Suzanne M. Carbotte, Brian Boston, Shuoshuo Han, Brandon Shuck, Jeffrey Beeson, Juan Pablo Canales, Harold Tobin, Nathaniel C. Miller, Mladen Nedimovic, Anne M. Trehu, Michelle Lee, Madelaine Lucas, Hanchao Jian, Danqi Jiang, Liam Moser, Christine S. Anderson, Darren Judd, Jaime Fernandez, Chuck Campbell, Antara Goswami, Rajendra Gahlawat